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TL494BD Datenblatt(PDF) 1 Page - ON Semiconductor

Teile-Nr. TL494BD
Beschreibung  SWITCHMODE TM Pulse Width Modulation Control Circuit
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Hersteller  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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TL494BD Datenblatt(HTML) 1 Page - ON Semiconductor

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© Semiconductor Components Industries, LLC, 2005
June, 2005 − Rev. 6
1
Publication Order Number:
TL494/D
TL494, NCV494
SWITCHMODE™ Pulse Width
Modulation Control Circuit
The TL494 is a fixed frequency, pulse width modulation control
circuit designed primarily for SWITCHMODE power supply control.
Features
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
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
Pb−Free Packages are Available*
MAXIMUM RATINGS (Full operating ambient temperature range applies,
unless otherwise noted.)
Rating
Symbol
Value
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
RqJA
80
°C/W
Operating Junction Temperature
TJ
125
°C
Storage Temperature Range
Tstg
−55 to +125
°C
Operating Ambient Temperature Range
TL494B
TL494C
TL494I
NCV494B
TA
−40 to +125
0 to +70
− 40 to +85
−40 to +125
°C
Derating Ambient Temperature
TA
45
°C
Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits are
exceeded, device functional operation is not implied, damage may occur and
reliability may be affected.
1. Maximum thermal limits must be observed.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
http://onsemi.com
MARKING
DIAGRAMS
SOIC−16
D SUFFIX
CASE 751B
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
ORDERING INFORMATION
TL494xDG
AWLYWW
x
= B, C or I
A
= Assembly Location
WL
= Wafer Lot
YY, Y
= Year
WW, W
= Work Week
G
= Pb−Free Package
1
16
PDIP−16
N SUFFIX
CASE 648
*This marking diagram also applies to NCV494.
PIN CONNECTIONS
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
Contro
l
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
TL494xN
AWLYYWWG
*
1
16


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