|
| 型号： | TL494 |
| 厂商： |
 Motorola, Inc |
| 描述： | switchmode pulse width modulation control circuit |
| PDF： | 预览 |
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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
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