TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 1 8 2 7 3 6 4 5 GND RT DTC SCP 3 2 1 20 19 NC GND FK PACKAGE (TOP VIEW) NC D OUT VCC COMP FB OUT D D, JG OR P PACKAGE (TOP VIEW) Complete PWM Power Control 3.6-V to 40-V Operation Internal Undervoltage-Lockout Circuit Internal Short-Circuit Protection Oscillator Frequency . . . 20 kHz to 500 kHz Variable Dead Time Provides Control Over Total Range 3% Tolerance on Reference Voltage (TL5001A) Available in Q-Temp Automotive HighRel Automotive Applications Configuration Control / Print Support Qualification to Automotive Standards NC D D D D D D NC 4 18 NC VCC 5 17 RT NC 6 16 NC COMP 7 15 DTC description NC SCP NC FB NC The TL5001 and TL5001A incorporate on a single NC 8 14 NC monolithic chip all the functions required for a 9 10 11 12 13 pulse-width-modulation (PWM) control circuit. Designed primarily for power-supply control, the TL5001/A contains an error amplifier, a regulator, an oscillator, a PWM comparator with a dead-time-control input, undervoltage lockout (UVLO), short-circuit protection (SCP), and an open-collector output transistor. The TL5001A has a typical reference voltage tolerance of 3% compared to 5% for the TL5001. The error-amplifier common-mode voltage ranges from 0 V to 1.5 V. The noninverting input of the error amplifier is connected to a 1-V reference. Dead-time control (DTC) can be set to provide 0% to 100% dead time by connecting an external resistor between DTC and GND. The oscillator frequency is set by terminating RT with an external resistor to GND. During low VCC conditions, the UVLO circuit turns the output off until VCC recovers to its normal operating range. The TL5001C and TL5001AC are characterized for operation from - 20C to 85C. The TL5001I and TL5001AI are characterized for operation from - 40C to 85C. The TL5001Q and TL5001AQ are characterized for operation from - 40C to 125C. The TL5001M and TL5001AM are characterized for operation from - 55C to 125C. AVAILABLE OPTIONS PACKAGED DEVICES TA - 20C to 85C - 40C to 85C - 40C to 125C SMALL OUTLINE (D) PLASTIC DIP (P) CERAMIC DIP (JG) CHIP CARRIER (FK) TL5001CD TL5001CP -- -- TL5001ACD TL5001ACP -- -- TL5001ID TL5001IP -- -- TL5001AID TL5001AIP -- -- -- -- TL5001QD -- TL5001AQD -- -- -- TL5001MJG TL5001MFK -- -- TL5001AMJG TL5001AMFK - 55C to 125C -- -- The D package is available taped and reeled. Add the suffix R to the device type (e.g., TL5001CDR). Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright 2002, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. * DALLAS, TEXAS 75265 1 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 schematic for typical application VI + TPS1101 VO + 2 VCC 5 SCP VO COMP 1 3 TL5001/A 6 7 DTC FB 4 RT GND 8 functional block diagram VCC 2 DTC 6 RT 7 OUT 1 UVLO IDT 2.5 V 1V 1.5 V Error Amplifier Reference Voltage 1V SCP Comparator 1 OSC PWM/DTC Comparator + FB COMP 4 - 3 SCP Comparator 2 SCP 5 8 GND 2 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 detailed description voltage reference A 2.5-V regulator operating from VCC is used to power the internal circuitry of the TL5001 and TL5001A and as a reference for the error amplifier and SCP circuits. A resistive divider provides a 1-V reference for the error amplifier noninverting input which typically is within 2% of nominal over the operating temperature range. error amplifier The error amplifier compares a sample of the dc-to-dc converter output voltage to the 1-V reference and generates an error signal for the PWM comparator. The dc-to-dc converter output voltage is set by selecting the error-amplifier gain (see Figure 1), using the following expression: VO = (1 + R1/R2) (1 V) Compensation Network R1 VI(FB) 3 COMP 4 FB TL5001/A - R2 + 8 GND To PWM Comparator Vref = 1 V Figure 1. Error-Amplifier Gain Setting The error-amplifier output is brought out as COMP for use in compensating the dc-to-dc converter control loop for stability. Because the amplifier can only source 45 A, the total dc load resistance should be 100 k or more. oscillator/PWM The oscillator frequency (fosc) can be set between 20 kHz and 500 kHz by connecting a resistor between RT and GND. Acceptable resistor values range from 15 k to 250 k. The oscillator frequency can be determined by using the graph shown in Figure 5. The oscillator output is a triangular wave with a minimum value of approximately 0.7 V and a maximum value of approximately 1.3 V. The PWM comparator compares the error-amplifier output voltage and the DTC input voltage to the triangular wave and turns the output transistor off whenever the triangular wave is greater than the lesser of the two inputs. dead-time control (DTC) DTC provides a means of limiting the output-switch duty cycle to a value less than 100 %, which is critical for boost and flyback converters. A current source generates a reference current (IDT) at DTC that is nominally equal to the current at the oscillator timing terminal, RT. Connecting a resistor between DTC and GND generates a dead-time reference voltage (VDT), which the PWM/DTC comparator compares to the oscillator triangle wave as described in the previous section. Nominally, the maximum duty cycle is 0 % when VDT is 0.7 V or less and 100 % when VDT is 1.3 V or greater. Because the triangle wave amplitude is a function of frequency and the source impedance of RT is relatively high (1250 ), choosing RDT for a specific maximum duty cycle, D, is accomplished using the following equation and the voltage limits for the frequency in question as found in Figure 11 (Voscmax and Voscmin are the maximum and minimum oscillator levels): POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 dead-time control (DTC) (continued) R DT + Rt ) 1250 ) Voscmin D V oscmax - V oscmin Where RDT and Rt are in ohms, D in decimal Soft start can be implemented by paralleling the DTC resistor with a capacitor (CDT) as shown in Figure 2. During soft start, the voltage at DTC is derived by the following equation: V DT [ IDTRDT 1- e -t R C DT DT 6 DTC CDT TL5001/A RDT Figure 2. Soft-Start Circuit If the dc-to-dc converter must be in regulation within a specified period of time, the time constant, RDTCDT, should be t0/3 to t0/5. The TL5001/A remains off until VDT 0.7 V, the minimum ramp value. CDT is discharged every time UVLO or SCP becomes active. undervoltage-lockout (UVLO) protection The undervoltage-lockout circuit turns the output transistor off and resets the SCP latch whenever the supply voltage drops too low (approximately 3 V at 25C) for proper operation. A hysteresis voltage of 200 mV eliminates false triggering on noise and chattering. short-circuit protection (SCP) The TL5001/A includes short-circuit protection (see Figure 3), which turns the power switch off to prevent damage when the converter output is shorted. When activated, the SCP prevents the switch from being turned on until the internal latching circuit is reset. The circuit is reset by reducing the input voltage until UVLO becomes active or until the SCP terminal is pulled to ground externally. When a short circuit occurs, the error-amplifier output at COMP rises to increase the power-switch duty cycle in an attempt to maintain the output voltage. SCP comparator 1 starts an RC timing circuit when COMP exceeds 1.5 V. If the short is removed and the error-amplifier output drops below 1.5 V before time out, normal converter operation continues. If the fault is still present at the end of the time-out period, the timer sets the latching circuit and turns off the TL5001/A output transistor. 4 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 short-circuit protection (SCP) (continued) 2.5 V RSCP 185 k 12 k CSCP SCP 5 From Error Amp 1.5 V SCP Comparator 2 To Output Drive Logic Q1 Vref = 1 V SCP Comparator 1 Q2 Figure 3. SCP Circuit The timer operates by charging an external capacitor (CSCP), connected between the SCP terminal and ground, towards 2.5 V through a 185-k resistor (RSCP). The circuit begins charging from an initial voltage of approximately 185 mV and times out when the capacitor voltage reaches 1 V. The output of SCP comparator 2 then goes high, turns on Q2, and latches the timer circuit. The expression for setting the SCP time period is derived from the following equation: V SCP + (2.5 * 0.185) 1 * e-t ) 0.185 t Where = RSCPCSCP The end of the time-out period, tSCP, occurs when VSCP = 1 V. Solving for CSCP yields: C SCP + 12.46 t SCP Where t is in seconds, C in F. tSCP must be much longer (generally 10 to 15 times) than the converter start-up period or the converter will not start. output transistor The output of the TL5001/A is an open-collector transistor with a maximum collector current rating of 21 mA and a voltage rating of 51 V. The output is turned on under the following conditions: the oscillator triangle wave is lower than both the DTC voltage and the error-amplifier output voltage, the UVLO circuit is inactive, and the short-circuit protection circuit is inactive. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 5 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 V Amplifier input voltage, VI(FB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V Output voltage, VO, OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 V Output current, IO, OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 mA Output peak current, IO(peak), OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mA Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating ambient temperature range, TA: TL5001C, TL5001AC . . . . . . . . . . . . . . . . . . . . . . - 20C to 85C TL5001I, TL5001AI . . . . . . . . . . . . . . . . . . . . . . . . - 40C to 85C TL5001Q, TL5001AQ . . . . . . . . . . . . . . . . . . . . . - 40C to 125C TL5001M, TL5001AM . . . . . . . . . . . . . . . . . . . . . - 55C to 125C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to 150C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260C Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltage values are with respect to network ground terminal. DISSIPATION RATING TABLE PACKAGE TA 25C POWER RATING DERATING FACTOR ABOVE TA = 25C TA = 70C POWER RATING TA = 85C POWER RATING TA = 125C POWER RATING D 725 mW 5.8 mW/C 464 mW 377 mW 145 mW FK 1375 mW 11.0 mW/C 880 mW 715 mW 275 mW JG 1050 mW 8.4 mW/C 672 mW 546 mW 210 mW P 1000 mW 8.0 mW/C 640 mW 520 mW 200 mW recommended operating conditions Supply voltage, VCC Amplifier input voltage, VI(FB) MIN MAX 3.6 40 UNIT V 0 1.5 V Output voltage, VO, OUT 50 V Output current, IO, OUT 20 mA COMP source current 45 COMP dc load resistance 100 A k Oscillator timing resistor, Rt 15 250 k Oscillator frequency, fosc 20 500 kHz TL5001C, TL5001AC - 20 85 TL5001I, TL5001AI - 40 85 TL5001Q, TL5001AQ - 40 125 TL5001M, TL5001AM - 55 125 Operating ambient temperature, temperature TA 6 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 C TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 electrical characteristics over recommended operating free-air temperature range, VCC = 6 V, fosc = 100 kHz (unless otherwise noted) reference PARAMETER TEST CONDITIONS Output voltage COMP connected to FB Input regulation VCC = 3.6 V to 40 V TA = - 20C to 25C (C suffix) Output voltage change with temperature TA = - 40C to 25C (I suffix) TA = 25C to 85C TL5001C, TL5001I MIN TYP MAX 0.95 1 1.05 2 12.5 - 10 -1 10 - 10 -1 10 - 10 -2 10 TL5001AC, TL5001AI MIN TYP MAX 0.97 UNIT 1 1.03 V 2 12.5 mV - 10 -1 10 - 10 -1 10 - 10 -2 10 mV/V All typical values are at TA = 25C. undervoltage lockout PARAMETER Upper threshold voltage TEST CONDITIONS TL5001C, TL5001I MIN TYP MAX Lower threshold voltage TA = 25C TA = 25C Hysteresis TA = 25C 100 200 TA = 25C 2.1 2.55 Reset threshold voltage All typical values are at TA = 25C. TL5001AC, TL5001AI MIN TYP MAX UNIT 3 3 2.8 2.8 V V 100 200 mV 2.1 2.55 V short-circuit protection PARAMETER SCP threshold voltage TEST CONDITIONS SCP voltage, latched TA = 25C No pullup SCP voltage, UVLO standby No pullup Input source current TA = 25C TL5001C, TL5001I MIN TYP MAX TL5001AC, TL5001AI MIN TYP MAX UNIT 0.95 1.00 1.05 0.97 1.00 1.03 V 140 185 230 140 185 230 mV 60 120 60 120 mV -15 -20 -15 -20 A -10 SCP comparator 1 threshold voltage All typical values are at TA = 25C. -10 1.5 1.5 V oscillator PARAMETER Frequency TEST CONDITIONS TL5001C, TL5001I MIN TYP MAX Rt = 100 k Standard deviation of frequency Frequency change with voltage Frequency change with temperature VCC = 3.6 V to 40 V TA = - 40C to 25C TA = - 20C to 25C TA = 25C to 85C UNIT 100 100 kHz 15 15 kHz 1 1 kHz -4 - 0.4 4 -4 - 0.4 4 kHz -4 - 0.4 4 -4 - 0.4 4 kHz -4 - 0.2 4 -4 - 0.2 4 kHz Voltage at RT All typical values are at TA = 25C. 1 POST OFFICE BOX 655303 TL5001AC, TL5001AI MIN TYP MAX * DALLAS, TEXAS 75265 1 V 7 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 electrical characteristics over recommended operating free-air temperature range, VCC = 6 V, fosc = 100 kHz (unless otherwise noted) (continued) dead-time control PARAMETER Output (source) current TL5001C, TL5001I MIN TYP MAX TEST CONDITIONS TL5001C TL5001I V(DT) = 1.5 V V(DT) = 1.5 V 0.9 x IRT 0.9 x IRT Duty cycle = 0% Input threshold voltage 0.5 Duty cycle = 100% 1.1 x IRT 1.2 x IRT 0.7 TL5001AC, TL5001AI MIN TYP MAX 0.9 x IRT 0.9 x IRT 1.1 x IRT 1.2 x IRT 0.5 1.3 UNIT 0.7 1.5 1.3 A V 1.5 All typical values are at TA = 25C. Output source current at RT error amplifier PARAMETER TEST CONDITIONS Input voltage TL5001C, TL5001I MIN TYP MAX VCC = 3.6 V to 40 V 0 Input bias current 1.5 - 160 Output voltage swing Positive 1.5 Negative 0 - 500 2.3 0.3 Open-loop voltage amplification TL5001AC, TL5001AI MIN TYP MAX - 160 1.5 0.4 Unity-gain bandwidth 1.5 Output (sink) current VI(FB) = 1.2 V, COMP = 1 V VI(FB) = 0.8 V, COMP = 1 V Output (source) current All typical values are at TA = 25C. 1.5 V - 500 nA 2.3 0.3 80 UNIT V 0.4 V 80 dB 1.5 MHz 100 600 100 600 A - 45 - 70 - 45 - 70 A output PARAMETER TEST CONDITIONS Output saturation voltage IO = 10 mA VO = 50 V, Off state current Off-state TL5001C, TL5001I MIN TYP MAX 1.5 VCC = 0 VO = 50 V VO = 6 V Short-circuit output current All typical values are at TA = 25C. 2 TL5001AC, TL5001AI MIN TYP MAX 1.5 2 10 10 10 10 40 40 UNIT V A mA total device PARAMETER Standby supply current Average supply current All typical values are at TA = 25C. 8 TEST CONDITIONS TL5001C, TL5001I MIN TYP MAX Off state Rt = 100 k POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TL5001AC, TL5001AI MIN TYP MAX UNIT 1 1.5 1 1.5 mA 1.4 2.1 1.4 2.1 mA TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 electrical characteristics over recommended operating free-air temperature range, VCC = 6 V, fosc = 100 kHz (unless otherwise noted) reference PARAMETER TEST CONDITIONS Output voltage TA = 25C TA = MIN to MAX COMP connected to FB Input regulation TA = MIN to MAX VCC = 3.6 V to 40 V Output voltage change with temperature All typical values are at TA = 25C. *Not production tested. TA = MIN to MAX TL5001Q, TL5001M MIN TYP MAX TL5001AQ, TL5001AM MIN TYP MAX 0.95 1.00 1.05 0.97 1.00 1.03 0.93 0.98 1.07 0.94 0.98 1.06 2 12.5 2 12.5 2 *6 2 *6 *- 6 *- 6 UNIT V mV % undervoltage lockout PARAMETER TL5001Q, TL5001M TEST CONDITIONS MIN TYP TL5001AQ, TL5001AM MAX MIN TYP Upper threshold voltage TA = MIN, 25C TA = MAX 3.00 3.00 2.55 2.55 Lower threshold voltage TA = MIN, 25C TA = MAX 2.8 2.8 2.0 2.0 Hysteresis TA = MIN to MAX 100 200 100 200 Reset threshold voltage TA = MIN, 25C TA = MAX 2.10 2.55 2.10 2.55 0.35 0.63 0.35 0.63 UNIT MAX V V mV V All typical values are at TA = 25C. short-circuit protection PARAMETER SCP threshold voltage SCP voltage, latched SCP voltage, UVLO standby Equivalent timing resistance SCP comparator 1 threshold voltage All typical values are at TA = 25C. TEST CONDITIONS TA = MIN, 25C TA = MAX TA = MIN to MAX TA = MIN to MAX No pullup TL5001Q, TL5001M MIN TYP MAX TL5001AQ, TL5001AM MIN TYP MAX 0.95 1.00 1.05 0.97 1.00 1.03 0.93 0.98 1.07 0.94 0.98 1.06 140 185 230 140 185 230 mV 60 120 60 120 mV No pullup TA = MIN to MAX TA = MIN to MAX POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 UNIT V 185 185 k 1.5 1.5 V 9 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 electrical characteristics over recommended operating free-air temperature range, VCC = 6 V, fosc = 100 kHz (unless otherwise noted) (continued) oscillator PARAMETER TEST CONDITIONS Frequency TL5001Q, TL5001M MIN TYP MAX TL5001AQ, TL5001AM MIN TYP MAX UNIT 100 100 kHz 2 2 kHz 1 1 kHz TA = MIN to MAX TA = MIN to MAX Rt = 100 k Standard deviation of frequency Frequency change with voltage TA = MIN to MAX Frequency change with temperature TA = MIN to MAX VCC = 3.6 V to 40 V Q suffix *- 6 3 *6 *- 6 3 *6 M suffix *- 9 5 *9 *- 9 5 *9 Voltage at RT All typical values are at TA = 25C. *Not production tested. TA = MIN to MAX 1 1 kHz V dead-time control PARAMETER TEST CONDITIONS Output (source) current TA = MIN to MAX TA = 25C Input threshold voltage TA = MIN to MAX V(DT) = 1.5 V Duty cycle = 0% TL5001Q, TL5001M MIN TYP MAX 0.9 x IRT 0.5 Duty cycle = 100% Duty cycle = 0% 1.1 x IRT 0.7 1.3 0.4 Duty cycle = 100% 0.9 x IRT 1.1 x IRT 0.5 UNIT A 0.7 1.5 0.7 1.3 TL5001AQ, TL5001AM MIN TYP MAX 1.3 0.4 1.5 0.7 1.7 1.3 V 1.7 All typical values are at TA = 25C. Output source current at RT error amplifier PARAMETER TL5001Q, TL5001M TEST CONDITIONS MIN Input bias current Output Out ut swing voltage TA = MIN to MAX Positive Negative Open-loop voltage amplification Unity-gain bandwidth Output (sink) current Output (source) current 1.5 TA = MIN to MAX TYP MAX - 160 - 500 2.3 0.3 MIN 1.5 0.4 UNIT TYP MAX - 160 - 500 2.3 0.3 nA V 0.4 V TA = MIN to MAX 80 80 dB TA = MIN to MAX TA = MIN to MAX 1.5 1.5 MHz A TA = MIN, 25C TA = MAX VI(FB) = 1.2 V, COMP = 1 V VI(FB) = 0 0.8 8 V, V COMP = 1 V 100 600 100 600 - 45 - 70 - 45 - 70 - 30 - 45 - 30 - 45 All typical values are at TA = 25C. 10 TL5001AQ, TL5001AM POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 A TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 electrical characteristics over recommended operating free-air temperature range, VCC = 6 V, fosc = 100 kHz (unless otherwise noted) (continued) output PARAMETER TL5001Q, TL5001M MIN TYP MAX TL5001AQ, TL5001AM MIN TYP MAX UNIT IO = 10 mA VO = 50 V, VCC = 0 VO = 50 V 1.5 1.5 V VO = 6 V 40 TEST CONDITIONS Output saturation voltage TA = MIN to MAX Off state current Off-state TA = MIN to MAX Short-circuit output current All typical values are at TA = 25C. TA = MIN to MAX 2 2 10 10 10 10 40 A mA total device PARAMETER TL5001Q, TL5001M TEST CONDITIONS MIN Standby supply current Off state Average supply current All typical values are at TA = 25C. TA = MIN to MAX TA = MIN to MAX Rt = 100 k POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TL5001AQ, TL5001AM TYP MAX 1 1.4 UNIT TYP MAX 1.5 1 1.5 mA 2.1 1.4 2.1 mA MIN 11 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 PARAMETER MEASUREMENT INFORMATION 2.3 V COMP 1.5 V DTC OSC PWM/DTC Comparator OUT SCP Comparator 1 1V SCP SCP Timing Period SCP Comparator 2 VCC 0V 3V NOTE A: The waveforms show timing characteristics for an intermittent short circuit and a longer short circuit that is sufficient to activate SCP. Figure 4. PWM Timing Diagram 12 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 TYPICAL CHARACTERISTICS OSCILLATION FREQUENCY vs AMBIENT TEMPERATURE OSCILLATOR FREQUENCY vs TIMING RESISTANCE 100 VCC = 6 V DT Resistance = Rt TA = 25C fosc - Oscillation Frequency - kHz fosc - Oscillator Frequency - Hz 1M 100 k 10 k 10 k 100 k VCC = 6 V Rt = 100 k DT Resistance = 100 k 98 96 94 92 90 88 - 50 1M - 25 REFERENCE OUTPUT VOLTAGE vs POWER-SUPPLY VOLTAGE V ref - Reference Output Voltage Fluctuation - % V ref - Reference Output Voltage - V 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0 1 2 3 4 5 50 75 100 REFERENCE OUTPUT VOLTAGE FLUCTUATION vs AMBIENT TEMPERATURE TA = 25C FB and COMP Connected Together 1.8 25 Figure 6 Figure 5 2 0 TA - Ambient Temperature - C Rt - Timing Resistance - 6 7 8 9 10 VCC - Power-Supply Voltage - V 0.6 0.4 0.2 0 - 0.2 - 0.4 - 0.6 IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII - 0.8 - 50 VCC = 6 V FB and COMP Connected Together - 25 0 25 50 75 TA - Ambient Temperature - C 100 Figure 8 Figure 7 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 13 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 TYPICAL CHARACTERISTICS AVERAGE SUPPLY CURRENT vs POWER-SUPPLY VOLTAGE AVERAGE SUPPLY CURRENT vs AMBIENT TEMPERATURE 2 1.3 I CC - Average Supply Current - mA I CC - Average Supply Current - mA Rt = 100 k TA = 25 C 1.5 1 0.5 0 0 10 20 30 VCC = 6 V Rt = 100 k DT Resistance = 100 k 1.2 1.1 1 0.9 0.8 0 - 50 40 - 25 Figure 9 50 75 100 ERROR AMPLIFIER OUTPUT VOLTAGE vs OUTPUT (SINK) CURRENT 3 1.8 VCC = 6 V TA = 25 C VO - Error Amplifier Output Voltage - V PWM Triangle Wave Amplitude Voltage - V 25 Figure 10 PWM TRIANGLE WAVE AMPLITUDE VOLTAGE vs OSCILLATOR FREQUENCY 1.5 1.2 Voscmax (100% duty cycle) 0.9 Voscmin (zero duty cycle) 0.6 0.3 0 10 k VCC = 6 V VI(FB) = 1.2 V TA = 25 C 2.5 2 1.5 1 0.5 0 100 k 1M fosc - Oscillator Frequency - Hz 10 M 0 0.2 Figure 12 POST OFFICE BOX 655303 0.4 IO - Output (Sink) Current - mA Figure 11 14 0 TA - Ambient Temperature - C VCC - Power-Supply Voltage - V * DALLAS, TEXAS 75265 0.6 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 TYPICAL CHARACTERISTICS ERROR AMPLIFIER OUTPUT VOLTAGE vs AMBIENT TEMPERATURE ERROR AMPLIFIER OUTPUT VOLTAGE vs OUTPUT (SOURCE) CURRENT 2.46 VCC = 6 V VI(FB) = 0.8 V TA = 25 C 2 1.5 1 0.5 60 80 100 20 40 IO - Output (Source) Current - A 2.44 2.43 2.42 2.41 2.40 - 50 0 0 2.45 VCC = 6 V VI(FB) = 0.8 V No Load 120 25 50 75 - 25 0 TA - Ambient Temperature - C Figure 14 Figure 13 ERROR AMPLIFIER OPEN-LOOP GAIN AND PHASE SHIFT vs FREQUENCY ERROR AMPLIFIER OUTPUT VOLTAGE vs AMBIENT TEMPERATURE 40 VCC = 6 V VI(FB) = 1.2 V No Load AV - Error Amplifier Open-Loop Gain - dB VO - Error Amplifier Output Voltage - mV 240 220 100 200 180 160 140 120 - 50 - 25 0 25 50 75 TA - Ambient Temperature - C 100 VCC = 6 V TA = 25 C - 180 30 - 210 20 - 240 AV - 270 10 0 - 330 - 10 - 20 10 k - 300 100 k 1M Error Amplifier Open-Loop Phase Shift 2.5 VO - Error Amplifier Output Voltage - V VO - Error Amplifier Output Voltage - V 3 - 360 10 M f - Frequency - Hz Figure 15 Figure 16 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 15 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 TYPICAL CHARACTERISTICS OUTPUT DUTY CYCLE vs DTC VOLTAGE SCP TIME-OUT PERIOD vs SCP CAPACITANCE 12 120 Output Duty Cycle - % 100 t SCP - SCP Time-Out Period - ms VCC = 6 V Rt = 100 k TA = 25 C 80 60 40 20 VCC = 6 V Rt = 100 k DT Resistance = 200 k TA = 25 C 10 8 6 4 2 0 0 0 0.5 1.5 1 DTC Voltage - V 2 0 20 40 100 120 OUTPUT SATURATION VOLTAGE vs OUTPUT (SINK) CURRENT DTC OUTPUT CURRENT vs RT OUTPUT CURRENT 2 - 60 VCC = 6 V TA = 25 C DT Voltage = 1.3 V TA = 25 C - 50 VCE - Output Saturation Voltage - V IO(DT) - DTC Output Current - A 80 Figure 18 Figure 17 - 40 - 30 - 20 - 10 0 1.5 1 0.5 0 0 - 10 - 20 - 30 - 40 - 50 - 60 0 IO - RT Output Current - A Figure 19 16 60 CSCP - SCP Capacitance - nF 5 10 15 IO - Output (Sink) Current - mA Figure 20 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 20 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 APPLICATION INFORMATION VI 5V C1 100 F 10 V R1 470 + Q1 TPS1101 GND L1 20 H 3.3 V C3 0.1 F CR1 MBRS140T3 C2 100 F 10 V 2 C4 1 F + VCC 5 SCP VO C5 0.1 F R2 56 k R3 43 k COMP 1 7 GND 3 U1 TL5001/A 6 C6 0.012 F DTC R5 7.50 k 1% FB R7 2.0 k C7 0.0047 F R4 5.1 k 4 RT R6 3.24 k 1% GND 8 Partial Bill of Materials: U1 TL5001/A Q1 TPS1101 LI CTX20-1 or 23 turns of #28 wire on Micrometals No. T50-26B core C1 TPSD107M010R0100 C2 TPSD107M010R0100 CR1 MBRS140T3 NOTES: A. B. C. D. + Texas Instruments Texas Instruments Coiltronics AVX AVX Motorola Frequency = 200 kHz Duty cycle = 90% max Soft-start time constant (TC) = 5.6 ms SCP TC = 70 msA Figure 21. Step-Down Converter POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 17 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 MECHANICAL DATA D (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PIN SHOWN 0.050 (1,27) 0.020 (0,51) 0.014 (0,35) 14 0.010 (0,25) M 8 0.008 (0,20) NOM 0.244 (6,20) 0.228 (5,80) 0.157 (4,00) 0.150 (3,81) Gage Plane 0.010 (0,25) 1 7 0- 8 A 0.044 (1,12) 0.016 (0,40) Seating Plane 0.069 (1,75) MAX 0.010 (0,25) 0.004 (0,10) PINS ** 0.004 (0,10) 8 14 16 A MAX 0.197 (5,00) 0.344 (8,75) 0.394 (10,00) A MIN 0.189 (4,80) 0.337 (8,55) 0.386 (9,80) DIM 4040047 / D 10/96 NOTES: B. C. D. E. 18 All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15). Falls within JEDEC MS-012 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TL5001, TL5001A PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS084F - APRIL 1994 - REVISED JANUARY 2002 MECHANICAL DATA FK (S-CQCC-N**) LEADLESS CERAMIC CHIP CARRIER 28 TERMINALS SHOWN 18 17 16 15 14 13 NO. OF TERMINALS ** 12 19 11 20 10 A B MIN MAX MIN MAX 20 0.342 (8,69) 0.358 (9,09) 0.307 (7,80) 0.358 (9,09) 28 0.442 (11,23) 0.458 (11,63) 0.406 (10,31) 0.458 (11,63) 21 9 22 8 44 0.640 (16,26) 0.660 (16,76) 0.495 (12,58) 0.560 (14,22) 23 7 52 0.740 (18,78) 0.761 (19,32) 0.495 (12,58) 0.560 (14,22) 24 6 68 25 5 0.938 (23,83) 0.962 (24,43) 0.850 (21,6) 0.858 (21,8) 84 1.141 (28,99) 1.165 (29,59) 1.047 (26,6) 1.063 (27,0) B SQ A SQ 26 27 28 1 2 3 4 0.080 (2,03) 0.064 (1,63) 0.020 (0,51) 0.010 (0,25) 0.020 (0,51) 0.010 (0,25) 0.055 (1,40) 0.045 (1,14) 0.045 (1,14) 0.035 (0,89) 0.045 (1,14) 0.035 (0,89) 0.028 (0,71) 0.022 (0,54) 0.050 (1,27) 4040140 / C 11/95 NOTES: A. B. C. D. E. All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. This package can be hermetically sealed with a metal lid. The terminals are gold-plated. Falls within JEDEC MS-004 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 19 MECHANICAL DATA MCER001A - JANUARY 1995 - REVISED JANUARY 1997 MECHANICAL DATA JG (R-GDIP-T8) CERAMIC DUAL-IN-LINE 0.400 (10,16) 0.355 (9,00) 8 5 0.280 (7,11) 0.245 (6,22) 1 0.063 (1,60) 0.015 (0,38) 4 0.065 (1,65) 0.045 (1,14) 0.310 (7,87) 0.290 (7,37) 0.020 (0,51) MIN 0.200 (5,08) MAX Seating Plane 0.130 (3,30) MIN 0.023 (0,58) 0.015 (0,38) 0-15 0.100 (2,54) 0.014 (0,36) 0.008 (0,20) 4040107/C 08/96 NOTES: A. B. C. D. E. 20 All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. This package can be hermetically sealed with a ceramic lid using glass frit. Index point is provided on cap for terminal identification. Falls within MIL STD 1835 GDIP1-T8 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 MECHANICAL DATA MCER001A - JANUARY 1995 - REVISED JANUARY 1997 MECHANICAL INFORMATION P (R-PDIP-T8) PLASTIC DUAL-IN-LINE PACKAGE 0.400 (10,60) 0.355 (9,02) 8 5 0.260 (6,60) 0.240 (6,10) 1 4 0.070 (1,78) MAX 0.310 (7,87) 0.290 (7,37) 0.020 (0,51) MIN 0.200 (5,08) MAX Seating Plane 0.125 (3,18) MIN 0.100 (2,54) 0.021 (0,53) 0.015 (0,38) 0- 15 0.010 (0,25) M 0.010 (0,25) NOM 4040082 / B 03/95 NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. Falls within JEDEC MS-001 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 21 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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