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TL494_08

更新时间： 2024-02-20 03:00:11
品牌 Logo 应用领域
韩国泰进 - HTC /
页数 文件大小 规格书
6页 138K
描述
Pulse-Width-Modulation Control Circuits

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TL494_08 数据手册

 浏览型号TL494_08的Datasheet PDF文件第2页浏览型号TL494_08的Datasheet PDF文件第3页浏览型号TL494_08的Datasheet PDF文件第4页浏览型号TL494_08的Datasheet PDF文件第5页浏览型号TL494_08的Datasheet PDF文件第6页 
Pulse-Width-Modulation Control Circuits  
TL494  
FEATURES  
● Complete PWM Power Control Circuitry  
SOP16/DIP16  
(TOP VIEW)  
NONINV  
INPUT  
NONINV  
INPUT  
● Uncommitted Outputs for 200 mA Sink or Source Current  
Error  
AMP 1  
Error  
AMP 2  
1
2
16  
15  
● Output Control Selects Single-Ended or Push-Pull Operation  
● Internal Circuitry Prohibits Double Pulse at Either Output  
● Variable Dead-Time Provides Control over Total Range  
● Internal Regulator Provides a Stable 5-V Reference Supply,5%  
● Circuit Architecture Allows Easy Synchronization  
● Moisture Sensitivity Level 3  
INV INPUT  
INV INPUT  
REF OUT  
FEEDBAC  
K
3
4
5
6
7
14  
13  
12  
11  
10  
DEAD-TIME  
CONTROL  
CT  
OUTPUT  
CONTROL  
Vcc  
C2  
E2  
RT  
GND  
C1  
E1  
8
9
DESCRIPTION  
The TL494 incorporate on a single monolithic chip all the functions  
required in the construction of a pulse-width-modulation control,  
these devices offer the systems engineer the flexibility to tailor  
the power supply control circuitry to his application.  
ORDERING INFORMATION  
Device  
TL494D  
TL494N  
Package  
16 SOP  
16 DIP  
The TL494 contains an error amplifier, an on-chip adjustable  
oscillator, a dead-time control comparator, pulse-steering control  
flip-flop, a 5-volt, 5% precision regulator, and output-control circuit.  
The error amplifier exhibits a common-mode voltage range from -0.3 volts to Vcc -2 volts. The dead-time control  
comparator has a fixed offset that provides approximately 5% dead time when externally altered. The on-chip  
oscillator may be bypassed by terminating RT (pin 6) to the reference output and providing a sawtooth in put to  
CT (pin 5), or it may be used to drive the common circuits in synchronous multiple-rail power supplies. 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 funct  
-ion. The architecture of these devices prohibits the possibility of either output being pulsed twice during push  
-pull operation.  
Functional Block Diagram  
OUTPUT CONTROL  
RT  
OSCILLATOR  
CT  
Q1  
C1  
E1  
DEAD  
DEAD-TIME CONTROL COMPARATOR  
0.1V  
C1  
TIME  
CONTROL  
Q2  
C2  
E2  
PULSE-STEERING FLIP-FLOP  
PWM COMPARATOR  
ERROR AMPLIFIER  
+
-
NONINVERTING INPUT  
1
INVERTING INPUT  
Vcc  
ERROR AMPLIFIER  
Vref  
NONINVERTING INPUT  
INVERTING INPUT  
REFERENCE  
+
FEEDBACK  
2
-
GND  
2008 - Ver. 1.2  
HTC  
1 / 6  
123456

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