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TL494 Datasheet (HTML) - Motorola, Inc

Part No. TL494
Description  SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT
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Maker  MOTOROLA [Motorola, Inc]
Homepage  http://www.freescale.com
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 1 page
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Device
Operating
Temperature Range
Package
TL494
SEMICONDUCTOR
TECHNICAL DATA
SWITCHMODE
PULSE WIDTH MODULATION
CONTROL CIRCUIT
ORDERING INFORMATION
TL494CN
TL494IN
TA = 0° to +70°C
TA = – 25° to +85°C
Plastic
Plastic
PIN CONNECTIONS
Order this document by TL494/D
N SUFFIX
PLASTIC PACKAGE
CASE 648
CT
RT
Ground
C1
1
Inv
Input
C2
Q2
E2
E1
1
≈ 0.1 V
Oscillator
VCC
5.0 V
REF
(Top View)
Noninv
Input
Inv
Input
Vref
Output
Control
VCC
Noninv
Input
Compen/PWN
Comp Input
Deadtime
Control
Error
Amp
+
2
3
4
5
6
7
89
10
11
12
13
14
15
16
2
Error
Amp
+
Q1
D SUFFIX
PLASTIC PACKAGE
CASE 751B
(SO–16)
TL494CD
SO–16
1
MOTOROLA ANALOG IC DEVICE DATA
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
On–Chip 5.0 V Reference
Adjustable Deadtime Control
Uncommitted Output Transistors Rated to 500 mA Source or Sink
Output Control for Push–Pull or Single–Ended Operation
Undervoltage Lockout
MAXIMUM RATINGS (Full operating ambient temperature range applies,
unless otherwise noted.)
Rating
Symbol
TL494C
TL494I
Unit
Power Supply Voltage
VCC
42
V
Collector Output Voltage
VC1,
VC2
42
V
Collector Output Current
(Each transistor) (Note 1)
IC1, IC2
500
mA
Amplifier Input Voltage Range
VIR
–0.3 to +42
V
Power Dissipation @ TA ≤ 45°C
PD
1000
mW
Thermal Resistance,
Junction–to–Ambient
R
θJA
80
°C/W
Operating Junction Temperature
TJ
125
°C
Storage Temperature Range
Tstg
–55 to +125
°C
Operating Ambient Temperature Range
TL494C
TL494I
TA
0 to +70
– 25 to +85
°C
Derating Ambient Temperature
TA
45
°C
NOTE:
1. Maximum thermal limits must be observed.
© Motorola, Inc. 1996
Rev 1



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