UC1843-DIE
www.ti.com SLUSBN6 – JULY 2013 CURRENT MODE PWM CONTROLLER
Check for Samples: UC1843-DIE FEATURES 1 Optimized For Off-line and DC-to-DC
Converters
Low Start-Up Current
Automatic Feed Forward Compensation
Pulse-by-Pulse Current Limiting Enhanced Load Response Characteristics
Under-Voltage Lockout With Hysteresis
Double Pulse Suppression
High Current Totem Pole Output
Low RO Error Amp DESCRIPTION
The UC1843-DIE provides the necessary features to implement off-line or dc-to-dc fixed frequency current mode
control schemes with a minimal external parts count. Internally implemented circuits include under-voltage
lockout featuring start up current, logic to insure latched operation, a PWM comparator which also provides
current limit control, and a totem pole output stage designed to source or sink high peak current. The output
stage, suitable for driving N-Channel MOSFETs, is low in the off state.
ORDERING INFORMATION (1) (1)
(2) PRODUCT PACKAGE
DESIGNATOR PACKAGE UC1843 TD Bare die in waffle pack (2) ORDERABLE PART NUMBER PACKAGE QUANTITY UC1843TD1 154 UC1843TD2 10 For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
Processing is per the Texas Instruments commercial production baseline and is in compliance with the Texas Instruments Quality
Control System in effect at the time of manufacture. Electrical screening consists of DC parametric and functional testing at room
temperature only. Unless otherwise specified by Texas Instruments AC performance and performance over temperature is not …