VOLTAGE MODE CONTROL CIRCUIT TL494 incorporates functions require

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VOLTAGE MODE CONTROL CIRCUIT TL494 incorporates functions require

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UNISONIC TECHNOLOGIES CO., TL494
VOLTAGE MODE CONTROL CIRCUIT
TL494 incorporates functions required construction pulse-width modulation switching circuit. Designed primarily switching power supply control DC-DC convectors, offers systems engineer flexibility tailor control circuitry application.
DIP-16 SOP-16
LINEAR INTEGRATED CIRCUIT
FEATURES
*Complete power control circuitry *Uncommitted outputs 200mA sink source current *Output control selects single ended push pull operation *Internal circuitry prohibits double pulses over total range *Easy synchronization *Pb-free plating product number: TL494L
ORDERING INFORMATION
Normal TL494-D16-T TL494-S16-R TL494-S16-T Order Number Lead Free Plating TL494L-D16-T TL494L-S16-R TL494L-S16-T Package DIP-16 SOP-16 SOP-16 Packing Tube Tape Reel Tube
TL494L-D16-T (1)Packing Type (2)Package Type (3)Lead Plating Tape Reel, Tube D16: DIP-16, S16: SOP-16 Lead Free Plating, Blank: Pb/Sn
www.unisonic.com.tw Copyright 2005 Unisonic Technologies Co.,
QW-R103-004,D
TL494
CONFIGURATIONS
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
Pulse Steering Flip-Flop oscillator
Input control
dead time comparator dead time control comparator 0.7mA Error Amplifier Error Amplifier
VREF reference regulation
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R103-004,D
TL494
ABSOLUTE MAXIMUM RATINGS
LINEAR INTEGRATED CIRCUIT
(Unless otherwise noted over operating free temperature range) PARAMETER SYMBOL Supply Voltage(Note Amplifier Input Voltage Collector Output Voltage VOUT Collector Output Current Ta=25°C Continuous Total Dissipation Derate Ta25°C
RATINGS UNIT VCC+0.3 1000 mW/°C Junction Temperature Operating Temperature TOPR Storage Temperature TSTG +150 Note Absolute maximum ratings those values beyond which device could permanently damaged. Absolute maximum ratings stress ratings only functional device operation implied. voltage values, except differential voltages with respect network ground terminal.
RECOMMENDED OPERATING CONDITIONS
PARAMETER Supply Voltage Amplifier Input Voltage Collector Output Voltage Collector Output Current(each Transistor) Current into Feedback Timing Capacitor Timing Resistor Oscillator Frequency Operating Free-Air Temperature SYMBOL VOUT fosc RATINGS -0.3 Vcc-2 10000 UNIT
0.47
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R103-004,D
TL494
ELECTRICAL CHARACTERISTICS
LINEAR INTEGRATED CIRCUIT
(Over recommended operating free-air temperature range, VCC=15V,f=1kHz,Unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS Reference Section Output Voltage VOUT IOUT=1mA 4.75 Input Regulation VCC=7V Output Regulation VOUT IOUT=1 10mA Output Voltage Change with Temperature Ta=MIN MAX(note Short-Circuit Output Current IO(SC) VREF=0 Oscillator Section Frequency CT=0.01F, RT=120k Values Standard Deviation Frequency constant Frequency Change with Voltage VCC=7v 40V,Ta=25°C CT=0.01F, RT=12k, Ta=MIN Frequency Change with Temperature Amplifier Section Input Offset Voltage Error VI(OFF) VOUT(pin 3)=2.5V Input Offset Current II(OFF) VOUT (pin 3)=2.5V Input Bias Current II(BIAS) VOUT (pin 3)=2.5V Common-Mode Input Voltage Range Error Open-Loop Voltage Amplification Unity-Gain Bandwidth Common-Mode Rejection Ratio Output Sink Current(pin Output source Current(pin Output Section Collector off-state current Emitter off-state Current Collector -emitter Common-emitter Saturation Voltage Emitter-Follower Output Control Input Current Dead Time Control Section Input bias (pin Maximum duty cycle, each output Input threshold Voltage(pin comparator Section Input Threshold Voltage(pin Input Sink Current (pin Total Device Standby Supply Current =15V =40V VCC=7V VOUT=3V, VOUT=0.5V 3.5V CMRR VCC=40V,TA=25°C VID=-15mV IO(SINK) V(pin 3)=0.5V IO(SOURCE) VID=15mV -5V, V(pin 3)=3.5V IC(OFF) IE(OFF) VCE=40V, VCC=40V VCC=VC=40V, VE=0 VE=0, IC=200mA VC=15V, IE=-200mA VIN=VREF VIN=0 5.25V VIN(pin 40=0 Zero duty Cycle Maximum duty cycle Zero Duty cycle Vpin 0.7V VREF, other Inputs outputs open
-0.3 Vcc-2
UNIT 5.25
Error
-100
II(BIAS) VTHR
VTHR II(SINK) IST-BY
Average supply current Vpin 4=2V Switching Characteristics, Ta=25°C Output Voltage Rise Time Common-emitter configuration Output Voltage Fall Time Output Voltage Rise Time Emitter-follower configuration Output Voltage Fall Time Note 1:All typical Values except temperature coefficient Ta=25°C. Note 2:For conditions shown MAX, appropriate value under recommended operating conditions. Note 3:Duration short-circuit should exceed second. Note 4:Standard deviation measure statistical distribution mean derived from formula:
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R103-004,D
TL494
TEST CIRCUIT
LINEAR INTEGRATED CIRCUIT
Vcc=15V
TEST INPUTS
0.01
DEAD-TIME FEEDBACK
OUTPUT
OUTPUT
ERROR AMPLIFIER
OUTPUT CONTROL VREF OUTPUT
VOLTAGE
VOLTAGE
VOLTAGE
DEAD-TIME CONTROL INPUT
THRESHOLD VOLTAGE
THRESHOLD VOLTAGE FEEDBACK
OPERATIONAL TEST CIRCUIT WAVEFORMS
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R103-004,D
TL494
TEST CIRCUIT(Cont.)
LINEAR INTEGRATED CIRCUIT
Vref
ERROR AMPLIFIER FEEDBACK TERMINAL
ERROR AMPLIFIER
AMPLIFIER CHARACTERISTICS
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R103-004,D
TL494
TYPICAL PERFORMANCE CHARACTERISTICS
LINEAR INTEGRATED CIRCUIT
assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges, other parameters) listed products specifications products described contained herein. products designed life support appliances, devices systems where malfunction these products reasonably expected result personal injury. Reproduction whole part prohibited without prior written consent copyright owner. information presented this document does form part quotation contract, believed accurate reliable changed without notice.
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R103-004,D

VOLTAGE MODE CONTROL CIRCUIT TL494 incorporates functions require

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