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TL494的详细信息

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Order this document by TL494/D  
SWITCHMODE  
PULSE WIDTH MODULATION  
CONTROL CIRCUIT  
The TL494 is a fixed frequency, pulse width modulation control circuit  
designed primarily for SWITCHMODE power supply control.  
Complete Pulse Width Modulation Control Circuitry  
On–Chip Oscillator with Master or Slave Operation  
On–Chip Error Amplifiers  
SEMICONDUCTOR  
TECHNICAL DATA  
On–Chip 5.0 V Reference  
Adjustable Deadtime Control  
D SUFFIX  
PLASTIC PACKAGE  
CASE 751B  
Uncommitted Output Transistors Rated to 500 mA Source or Sink  
Output Control for Push–Pull or Single–Ended Operation  
Undervoltage Lockout  
(SO–16)  
N SUFFIX  
PLASTIC PACKAGE  
CASE 648  
PIN CONNECTIONS  
Noninv  
Input  
Noninv  
Input  
1
2
+
+
16  
15  
Error  
Error  
MAXIMUM RATINGS (Full operating ambient temperature range applies,  
unless otherwise noted.)  
1
2
Amp  
Amp  
Inv  
Input  
Inv  
Input  
V
CC  
Compen/PWN  
Comp Input  
5.0 V  
REF  
Rating  
Power Supply Voltage  
Collector Output Voltage  
Symbol TL494C TL494I  
Unit  
V
3
4
14  
13  
V
ref  
0.1 V  
V
42  
42  
Deadtime  
Control  
Output  
Control  
CC  
V
C1  
,
V
C
T
5
12  
V
V
CC  
C2  
Oscillator  
Collector Output Current  
(Each transistor) (Note 1)  
I
, I  
500  
mA  
R
T
6
7
11 C2  
10 E2  
C1 C2  
Q2  
Ground  
C1  
Amplifier Input Voltage Range  
V
IR  
–0.3 to +42  
1000  
V
Q1  
8
9
E1  
Power Dissipation @ T 45°C  
P
D
mW  
°C/W  
A
Thermal Resistance,  
Junction–to–Ambient  
R
80  
θJA  
(Top View)  
Operating Junction Temperature  
Storage Temperature Range  
T
125  
°C  
°C  
°C  
J
T
stg  
–55 to +125  
ORDERING INFORMATION  
Operating  
Operating Ambient Temperature Range  
T
A
TL494C  
TL494I  
0 to +70  
25 to +85  
Temperature Range  
Device  
TL494CD  
TL494CN  
TL494IN  
Package  
SO–16  
Plastic  
T
A
= 0° to +70°C  
Derating Ambient Temperature  
T
A
45  
°C  
NOTE: 1. Maximum thermal limits must be observed.  
T
A
= – 25° to +85°C  
Plastic  
Motorola, Inc. 1996  
Rev 1