Datasheet

DESCRIPTION (CONT.)
CONNECTION DIAGRAMS
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
+VIN
V (2.5V)
REF
GND
WINDOW ADJUST
SENSE4
INVERT INPUT
SENSE4
G.P.OP-AMP INV.
LINE/SWITCHERSENSE
POWEROK
UVDELAY
UVFAULT
SENSE3
SENSE2
SENSE1
G.P.OP-AMP N.I.
G.P.OP-AMP OUT
OVFAULT
OVDELAY
DIL-18,SOIC-18
JorN,DWPACKAGE
(TOP VIEW)
3 2 1 20 19
18
17
16
15
14
9 11 12 1310
4
5
6
7
8
+VIN
WINDOW ADJUST
V (2.5V)
REF
GND
GND
NC
SENSE4INVERT
INPUT
SENSE4
SENSE3
SENSE2 SENSE1
OVDELA
Y
OVFAULT
UVFAULT
UVDELAY
LINE/SWITCHER
SENSE
POWEROK
G.P.OP-AMP OUT
G.P.OP-AMP N.I.
G.P.OP-AMP INV
PLCC-20,LCC-20
Q,L PACKAGE
(TOP VIEW)
ABSOLUTE MAXIMUM RATINGS
(1)
UC1903
UC2903
UC3903
SLUS233A – OCTOBER 1999 – REVISED SEPTEMBER 2008 ........................................................................................................................................ www.ti.com
An additional, uncommitted, general purpose op-amp is also included. This op-amp, capable of sourcing 20 mA
of output current, can be used for a number of auxiliary functions including the sensing and amplification of a
feedback error signal when the 2.5-V output is used as a system reference.
These parts operate over an 8-V to 40-V input supply range and require a typical stand-by current of only 7 mA.
over operating free-air temperature range (unless otherwise noted)
VALUE UNIT
+VIN Supply Voltage +40 V
Open Collector Output Voltages. +40 V
Open Collector Output Currents. 50 mA
Sense 1-4 Input Voltages – 0.3 to +20 V
Line/Switcher Sense Input Voltage – 0.3 to +40 V
Op-Amp and Inverter Input Voltages – 0.3 to +40 V
Op-Amp and Inverter Output Currents . – 40 mA
Window Adjust Voltage. 0.0 to +10 V
Delay Pin Voltages 0.0 to +5 V
Reference Output Current – 40 mA
Power Dissipation at T
A
= 25 ° C
(1)
1000 mW
Power Dissipation at T
C
= 25 ° C
(1)
2000 mW
Operating Junction Temperature – 55 to +150 ° C
Storage Temperature – 65 to +150 C
Lead Temperature (Soldering, 10 Seconds) 300 ° C
(1) Voltages are referenced to ground (Pin 3). Currents are positive into, negative out of, the specified terminals. Consult Packaging Section
of Databook for thermal limitations and considerations of package.
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Product Folder Link(s): UC1903 UC2903 UC3903