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TEXAST INSTRUMENTS TL493 TL494 TL495 DATA SHEET

1. Zero duty cycle Input threshold voltage pin 4j P ge pir Maximum duty cycle pwm comparator section see Figure 1 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Input threshold votege pin 3j zemdwycyde a 48 v Input sink current pin 3 Wsaz07v 93 97 steering control TL495 only PARAMETER TEST CONDITIONS ELLE zener diode circuit TLA95 only PARAMETER TEST CONDITIONS Breakdown voltage U 1z 2mA total device TEST CONDITIONS MIN TYP Vcc 15V PARAMETER TEST CONDITIONS N Data Sheets UNIT L 39 _ mj Switching characteristics TA 25 Common emitter configuration 200 ms Emitterfollower configuration ro 300 ns 81 typical values except for temperature coefficient at TA 25 TEXAS 2 127 INSTRUMENTS POST OFFICE BOX 655012 DALLAS TEXAS 75265 http www chipdocs com TLA93 TL494 TL495 PULSE WIDTH MODULATION CONTROL CIRCUITS PARAMETER MEASUREMENT INFORMATION 15V DEAD TIME OUTPUT 1 TEST INPUTS FEEDBACK 2 OUTPUT 2 STEERING OPEN D 28 CONTROL ie ERROR V2 OPEN OUTPUT CONTROL our s GND o TEST CIRCUIT VOLTAGE AT C1 VOLTAGE AT C2 VOLTAGE AT
2. 10 L 1 1k 4k 10k 40k 100k 400k1M RT Timing Resistance Q FIGURE 5 AMPLIFIER VOLTAGE AMPLIFICATION vs FREQUENCY 100 7 4 15V 90 1 TA 25 Voltage Amplification dB m E l 10 100 1k 10 k 1M f Frequency Hz FIGURE 6 tFrequency variation Af is the change in oscillator frequency that occurs over the fuil temperature range j 2 130 INSTRUMENTS POST OFFICE BOX 655012 DALLAS TEXAS 75265 http www chipdocs com
3. 0 c ie prete ers is Lead temperature 1 6 mm 1 16 inch from case for 60 seconds J package Lead temperature 1 6 mm 1 16 inch from case for 10 seconds D or N package 2g o NOTE 1 All voltage values except differential voltages are with respect to the network ground terminal o lt DISSIPATION RATING TABLE o PACKAGE TA 25 DERATING DERATE TA 70 TA 85 C 2 POWER RATING FACTOR ABOVE TA POWER RATING POWER RATING D 900 7 6 mw C 25 608 mw 494 mw J 1000 8 2 mw C 28 C 656 mw 533 mw N 1000 9 2 mW C 41 736 mw 598 mw recommended operating conditions TL493C 4941 TL494C TL495C MN MAX min Supiy vee U U C j Amplifier input voltages V 0 3 Vcc L y m nr o UNIT 2 Collector output voltage Vo 40 7 200 200 Current into feedback terminal 0 3 0 3 Timing capacitor 0 47 10 000 Oscillator frequency 1 30 1 km Operating free air temperature TA e o TEXAS bue INSTRUMENTS POST OFFICE BOX 655012 DALLAS TEXAS 75265 http www chipdocs com TL493 1494 T1495 PULSE WIDTH MODULATION CONTROL CIRCUITS electrical characteristics over recommended operating free air temperature range vec 15 V f 10 kHz unless
4. DEAD TIME THRESHOLD VOLTAGE CONTROL INPUT 1 1 i THRESHOLD VOLTAGE I FEEDBACK i i I H ja MAX a 0 DUTY CYCLE T VOLTAGE WAVEFORMS FIGURE 1 OPERATIONAL TEST CIRCUIT AND WAVEFORMS 2 128 I EXAS NSTRUMENTS POST OFFICE BOX 655012 DALLAS TEXAS 75265 http www chipdocs com lI TL493 TL494 TL495 PULSE WIDTH MODULATION CONTROL CIRCUITS PARAMETER MEASUREMENT INFORMATION AMPLIFIER UNDER TEST pc AMPLIFIER FIGURE 2 AMPLIFIER CHARACTERISTICS FEEDBACK TERMINAL EACH OUTPUT CIRCUIT OUTPUT CL 15 pF includes probe and jig capacitance TEST CIRCUIT OUTPUT VOLTAGE WAVEFORM FIGURE 3 COMMON EMITTER CONFIGURATION 15V 2 I EACH OUTPUT I CIRCUIT OUTPUT 68 0 2W EU E EE CL 15 pF includes probe and jig capacitance TEST CIRCUIT OUTPUT VOLTAGE WAVEFORM FIGURE 4 EMITTER FOLLOWER CONFIGURATION EXAS M INSTRUMENTS POST OFFICE BOX 655012 DALLAS TEXAS 75265 http www chipdocs com Data Sheets B 2 129 TL493 TL434 TL495 PULSE WIDTH MODULATION CONTROL CIRCUITS TYPICAL CHARACTERISTICS OSCILLATOR FREQUENCY AND FREQUENCY VARIATIONT vs TIMING RESISTANCE 400 Oscillator Frequency Hz _ 100 40 s us WN
5. TL493 TL494 TLA95 PULSE WIDTH MODULATION CONTROL CIRCUITS D2535 JANUARY 1983 REVISED OCTOBER 1988 Complete PWM Power Control Circuitry TL493C D OR N PACKAGE TOP VIEW Uncommitted Outputs for 200 mA Sink or ERROR Source Current iNPUT T Cis CURRENT 1 INVINPUT z is INV INPUT EIMETTAME Output Control Selects Single Ended or FEEDBACK s OUT Push Puil Operation DEAD TIME CONTROL a 3 JOUTPUT CONTROL Cr s s2 Vcc Internal Circuitry Prohibits Double Pulse at Ri je nDe Either Output enoi 2 1 Variable Dead Time Provides Control over Total Range TL4941 TL494C D J OR N PACKAGE 2 internal Regulator Provides a Stable 5 V VIEWI Reference Supply 596 Y NONINV INPUT T Noninv ror S Y AMPS INVINPUT 2 s JiNV INPUT AMP 2 vo Circuit Architecture Allows Easy FEEDBACK s u REF OUT t Synchronization DEAD TIME CONTROL a ss oUTPUT CONTROL o DS cr 2 Vcc lt TL493 has Output Current Limit Sensing Rr je nc 7 GND 7 10 E2 TL495 has On Chip 39 V Zener and External cile 901 S Control of Output Steering TLA95C N PACKAGE TOP VIEW The TL493 TL494 TL495 each incorporate ERROR J INPUT Uiel noninv description on a single monolithic chip all the functions AMP 1 iNViNPUT 2 17DINV INPUT 2 required in the constr
6. oth input _ PWM Output at Q2 to CrT pin 5 or it may be used to drive the common circuits in synchronous multiple rail power supplies Single ended or parallel output PRODUCTION DATA documents contain information Copyright 1983 Texas Instruments Incorporated current of publication date Products conform to J specifications per the terms of Texas Instruments TEXAS standard warranty Production processing doss nat 2 123 necessarily include testing of all parameters INsT RUMENTS POST OFFICE BOX 655012 DALLAS TEXAS 75265 http www chipdocs com TL493 TL494 TLA495 PULSE WIDTH MODULATION CONTROL CIRCUITS M M upa H n s M r ac description continued The uncommited output transistors provide either common emitter or emitter follower output capability Each device provides for push pull or single ended output operation which may be selected through the output control function The architecture of these devices prohibits the possibility of either output being pulsed twice during push pull operation The TL493 and TL494 are similar except that an additional error amplifier is included in the TL494 instead of a current limiting amplifier The TL495 provides the identical functions found in the TL494 In addition it contains an on chip 39 volt diode for high voltage applications where VCC is greater than 40 volts and an output steering control that over
7. otherwise noted reference section TL493C 4941 TLA94C R TEST CONDITIONST PARAMETEI S TERUSE MIN TET T L Sima 45 E TETTE v vesv S Output regulation lg 110 10 mA 3 8 v It h 2 Qutput voltage change ATA MIN to MAX 02 196 with temperature p Sensei g oscillator section see Figure 1 to o TL493C 14941 TL494G PARAMETER TEST CONDITIONS T UNIT TL495C MIN TYP MAX Z CELOT t fe val f Vcc and Standard deviation of frequency f o CG Sn TA constant Frequency change with voltage 7 V to 40 V TA 25 Z A 0 01 aF 12 change with temperature requenev change wiin temparature ATA MIN to MAX amplifier sections see Figure 2 PARAMETER TEST CONDITIONS MIN MAX UNIT Input offset voltage Current timit Vo pin 3 2 5 V mV TL493 only Input offset current Vonsi 28v OO J 25 250 n oa 1 Comi mode input Vcc vec 7 V to 40 V cc 2 voltage range Current limit 0 3103 TL493 only ba Emo 70 95 Open loop voltage amplification Current limit 2kQ Vo 0 5 V to 3 5 V 1 1 493 only Unity gain bandwidth Vo 0 5Vto3 5V RL 2k0 so xm Common mode 65 89 rejection ratio Current mit 70 TL493 only Output sink curren
8. rides the internal control of the pulse steering flip flop 2 The TL494l is characterized for operation from 25 to 85 The TLA93C TL494C and TLA95C are characterized for operation from O C to 70 C OQ functional block diagram t e r r o STEERING INPUT OUTPUT CONTROL a TL495 ONLY pg SEE FUNCTION TABLE SEE FUNCTION TABLE Fl i RT _ o e OSCILLATOR i DEAD TIME CONTROL o COMPARATOR E1 DEAD j gt TIME 02 CONTROL ERROR AMPLIFIER NONINVERTING PWM PULSESSTEERING ES INPUT COMPARATOR FLIP FLOP INVERTING INPUT purccb x ERROR AMPLIFIER E Eum NONINVERTING 1 M I l cc INPUT 1 INVERTING 1 REFERENCE I I REGULATOR VREF L T1494 AND TL495 1 CURRENT HMMIT 1 NONINVERTING AMPLIFIER 145 7 GND INPUT i 20 08 V D 1 TR I INVERTING l 07 mA y INPUT T L maos L T493 _ FEEDBACK 2 124 I NSTRUMENTS POST OFFICE BOX 655012 DALLAS TEXAS 75265 http www chipdocs com M 1TL493 TL494 TL495 PULSE WIDTH MODULATION CONTROL CIRCUITS absolute maximum ratings over operating free air temperature range unless otherwise noted TL493C TL4941 TL UNIT Supply voltage VCC see Note 1 cx 4 Amplifier input voltage Vcc 0 3 Vcc 0 3 Vcc 0 3 Lv Collector output voltage 41 4 CCCII 01 80 Ses Dissipation Rating Table Operating free air temperature range 25to85 0 57
9. t pin 3 VID 15 mV to 5 V Vipin 3 0 7 V 03 07 Output source current pin 3 Vip 15 mV to 5 V Vipin 3 3 5 V 2 mA t For conditions shown as MIN or MAX use the appropriate value specified under recommended operating conditions All typical values except for parameter changes with temperature are at TA 25 8 Duration of the short circuit should not exceed one second E ixn x2 q Standard deviation is a measure of the statistical distribution about the mean as derived from the formula n 1 Temperature coefficient of timing capacitor and timing resistor not taken into account N 1 TEXAS 2 126 NSTRUMENTS POST OFFICE BOX 655012 DALLAS TEXAS 75265 http www chipdocs com TL493 TL494 TLA95 PULSE WIDTH MODULATION CONTROL CIRCUITS electrical characteristics over recommended operating free air temperature range Vcc 15 V f 10 kHz unless otherwise noted output section TL493C 4941 TL494C TL495C Collector off state current 40 V Vcc 40 V 12 Vec 40 V VE 0 m Collector emitter Ve 0 200 mA 0 03131 1 3 v saturation voltage Emitter follower 15V ig 200 mA 115 25 dead time control section see Figure 1 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Input bias current pin 4 vows 40 Maximum duty cycle each output VI pin 4 0 0 1 kF RT 12 KQ 45
10. uction of a pulse width N QE C SUBACRLIS pner OUT modulation control circuit Designed primarily for DEADTIMECONTROLLI amp 2 i Cr Js a ouTPUT CONTROL power supply control these devices offer the Rr s i3 STEERING INPUT systems engineer the flexibility to tailor the GND 2 Vcc power supply control circuitry to his application cils The TL493 contains an error amplifier current limiting amplifier an on chip adjustable oscillator a dead time control comparator pulse steering control flip flop a 5b volt 596 precision regulator and output control circuits DEVICE TYPES SUFFIX VERSIONS AND PACKAGES maf taos TL49 I D J N TL49 C D J N The error amplifier exhibits a common mode voltage range from O 3 volts to 2 volts These combinations are not defined by this data sheet The current limit amplifier exhibits a common mode voltage range from volts to volts FUNCTION TABLE with an offset voltage of approximately 80 INPUTS millivolts in series with the inverting input to ease STEERING ircui i i ti TPUT circuit design requirements The dead time OUTPU INPUT OUTPUT FUNCTION control comparator has a fixed offset that CONTROL 1 495 provides approximately 596 dead time when externally altered The on chip oscillator may be Normal push pull operation bypassed by terminating RT pin 6 to the PWM Output at Q1 reference output and providing a sawto

TEXAST INSTRUMENTS TL493 TL494 TL495 DATA SHEET

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