tl494-s16-t Unisonic Technologies, tl494-s16-t Datasheet

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tl494-s16-t

Manufacturer Part Number
tl494-s16-t
Description
Voltage Mode Pwm Control Ic
Manufacturer
Unisonic Technologies
Datasheet
TL494
VOLTAGE MODE PWM
CONTROL CIRCUIT
construction of a pulse-width modulation switching circuit.
Designed primarily for switching power supply control or DC-DC
convectors, it offers the systems engineer the flexibility to tailor
control circuitry to its own application.
*Complete PWM power control circuitry
*Uncommitted outputs for 200mA sink or source current
*Output control selects single ended or push pull operation
*Internal circuitry prohibits double pulses over total range
*Easy synchronization
www.unisonic.com.tw
Copyright © 2007 Unisonic Technologies Co., Ltd
The UTC TL494 incorporates all the functions required in the
ORDERING INFORMATION
DESCRIPTION
FEATURES
TL494-D16-T
TL494-S16-R
TL494-S16-T
Normal
UNISONIC TECHNOLOGIES CO., LTD
Ordering Number
Lead Free Plating
TL494L-S16-R
TL494L-D16-T
TL494L-S16-T
Package
SOP-16
SOP-16
DIP-16
LINEAR INTEGRATED CIRCUIT
Tape Reel
*Pb-free plating product number: TL494L
Packing
Tube
Tube
SOP-16
DIP-16
QW-R103-004,E
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tl494-s16-t Summary of contents

Page 1

... ORDERING INFORMATION Ordering Number Normal Lead Free Plating TL494-D16-T TL494-S16-R TL494-S16-T www.unisonic.com.tw Copyright © 2007 Unisonic Technologies Co., Ltd Package TL494L-D16-T DIP-16 TL494L-S16-R SOP-16 TL494L-S16-T ...

Page 2

... TL494 PIN CONFIGURATION BLOCK DIAGRAM oscillator T 5 dead time comparator 4 dead time control 0.7mA 1 2 Error Amplifier UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LINEAR INTEGRATED CIRCUIT 13 Input control Pulse Steering Flip-Flop reference PWM comparator 16 15 Error Amplifier ...

Page 3

... TL494 ABSOLUTE MAXIMUM RATINGS (Unless otherwise noted all is over operating free air temperature range) PARAMETER Supply Voltage(Note 3) Amplifier Input Voltage Collector Output Voltage Collector Output Current Continuous Total Dissipation Junction Temperature Operating Temperature Storage Temperature Note 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. ...

Page 4

... TL494 ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range, V PARAMETER Reference Section Output Voltage Input Regulation Output Regulation Output Voltage Change with Temperature Short-Circuit Output Current Oscillator Section Frequency Standard Deviation of Frequency Frequency Change with Voltage Frequency Change with Temperature Amplifier Section ...

Page 5

... TL494 TEST CIRCUIT TEST INPUTS 12k 0.01 F 50k VOLTAGE at C1 VOLTAGE at C2 VOLTAGE at CT DEAD-TIME THRESHOLD VOLTAGE CONTROL INPUT FEEDBACK FIG 1. OPERATIONAL TEST CIRCUIT AND WAVEFORMS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LINEAR INTEGRATED CIRCUIT Vcc=15V 2W 150 12 4 Vcc DEAD-TIME C1 3 FEEDBACK ...

Page 6

... TL494 TEST CIRCUIT(Cont.) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LINEAR INTEGRATED CIRCUIT ERROR AMPLIFIER 1 Vin FEEDBACK 2 TERMINAL 16 Vref 15 ERROR AMPLIFIER FIG 2. AMPLIFIER CHARACTERISTICS QW-R103-004,E ...

Page 7

... TL494 TYPICAL PERFORMANCE CHARACTERISTICS UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury ...

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