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TL594 Datasheet PDF : 12 Pages
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TL594
Precision Switchmode
Pulse Width Modulation
Control Circuit
The TL594 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, 1.5% Accuracy
• Adjustable Deadtime Control
• Uncommitted Output Transistors Rated to 500 mA Source or Sink
• Output Control for Push−Pull or Single−Ended Operation
• Undervoltage Lockout
• Pb−Free Packages are Available*
MAXIMUM RATINGS
Rating
Power Supply Voltage
Collector Output Voltage
Collector Output Current
(Each Transistor) (Note 1)
Symbol
VCC
VC1,
VC2
IC1, IC2
Value
42
42
500
Unit
V
V
mA
Amplifier Input Voltage Range
Power Dissipation @ TA ≤ 45°C
Thermal Resistance
Junction−to−Ambient (PDIP)
Junction−to−Air (TSSOP)
Junction−to−Ambient (SOIC)
VIR
PD
RqJA
−0.3 to +42
1000
80
140
135
V
mW
°C/W
Operating Junction Temperature
Storage Temperature Range
Operating Ambient Temperature Range
TL594CD, CN, CDTB
TJ
125
°C
Tstg −55 to +125 °C
TA
°C
−40 to 85
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.
© Semiconductor Components Industries, LLC, 2005
1
November, 2005 − Rev. 5
http://onsemi.com
1
1
1
MARKING
DIAGRAMS
16
PDIP−16
N SUFFIX
CASE 648
1
TL594CN
AWLYYWWG
16
SO−16
D SUFFIX
CASE 751B
1
TL594CDG
AWLYWW
TSSOP−16
DTB SUFFIX
CASE 948F
16
TL59
4DTB
ALYWG
G
1
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
Noninv
Input
1
Inv
Input
2
+
Error
−Amp
1
Compen/PWN
Comp Input
3
Deadtime
Control
4
≈ 0.1 V
+
2
Error
Amp−
VCC
5.0 V
REF
16
Noninv
Input
15
Inv
Input
14 Vref
13
Output
Control
CT 5
RT 6
Ground 7
Oscillator
12 VCC
11 C2
Q2
10 E2
C1 8
Q1
9 E1
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
Publication Order Number:
TL594/D
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