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TL494BD Scheda tecnica(PDF) 1 Page - ON Semiconductor

Il numero della parte TL494BD
Spiegazioni elettronici  SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT
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© Semiconductor Components Industries, LLC, 2004
April, 2004 − Rev. 5
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.
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
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
1. Maximum thermal limits must be observed.
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
Device
Package
Shipping
ORDERING INFORMATION
TL494CD
SO−16
48 Units/Rail
SO−16
D SUFFIX
CASE 751B
16
1
1
16
TL494xD
AWLYWW
MARKING
DIAGRAMS
x
= B, C or I
A
= Assembly Location
WL, L
= Wafer Lot
YY, Y
= Year
WW, W = Work Week
1
16
PDIP−16
N SUFFIX
CASE 648
TL494xN
AWLYYWW
16
1
TL494CDR2
2500 Tape & Reel
SO−16
TL494CN
25 Units/Rail
PDIP−16
TL494IN
25 Units/Rail
PDIP−16
SO−16
TL494BD
48 Units/Rail
TL494BDR2
2500 Tape & Reel
SO−16
http://onsemi.com
*
*This marking diagram also applies to NCV494.
NCV494BDR2*
2500 Tape & Reel
SO−16
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
*NCV494: Tlow = −40°C, Thigh = +125°C.
Guaranteed by design. NCV prefix is for
automotive and other applications requiring site
and change control.


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