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See Technical Specifications

UC3843A +BOM

Efficient current control for a wide range of load

Manufacturer:

Texas Instruments
Mfr.Part #:

UC3843A
Datasheet:

UC3843A Datasheet (PDF)
Topology:

Boost, Buck, Flyback, Forward
Control Mode:

Current
Duty Cycle (max) (%):

100
Switching Frequency (max) (kHz):

500
EDA/CAD Models:

Request Free CAD Models for UC3843A

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UC3843A General Description

IV. The UC3843A is an upgraded version of the UC3843, featuring enhanced capabilities for controlling current-mode or switched-mode power supplies. With a startup current of less than 0.5 mA and a trimmed oscillator discharge of 8.3 mA, this device offers improved performance compared to its predecessors in the UCx84x family. During UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V, making the UC3843A a reliable choice for power supply applications

Key Features

Pulse Width Modulation for Power Control
Temperature Compensation for Wide Range Operation
Overcurrent Protection to Prevent Damage
Safe Shutdown on Overheat or Fault
Low Quiescent Current for Efficiency
Adjustable Undervoltage Lockout Level

Specifications

Topology	Boost, Buck, Flyback, Forward	Control mode	Current
Duty cycle (max) (%)	100	Switching frequency (max) (kHz)	500
Features	Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology	UVLO thresholds on/off (V)	8.4/7.6
Operating temperature range (°C)	0 to 70	Rating	Catalog
Gate drive (typ) (A)	1	Vin (max) (V)	28