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UC3843A-BW

FCI
Part Number UC3843A-BW
Manufacturer FCI
Description Current Mode PWM Controller
Published Jan 19, 2016
Detailed Description UC384XA-BW Current Mode PWM Controller (UC3842A-BW/43A-BW/44A-BW/45A-BW) DESCRIPTION The UC3842A-BW/43A-BW/44A-BW/45A-...
Datasheet PDF File UC3843A-BW PDF File

UC3843A-BW
UC3843A-BW

Overview
UC384XA-BW Current Mode PWM Controller (UC3842A-BW/43A-BW/44A-BW/45A-BW) DESCRIPTION The UC3842A-BW/43A-BW/44A-BW/45A-BW are fixed frequency current mode PWM controller.
They are specially designed for OFF−Line and DC to DC converter applications with a minimal external components.
Internally implemented circuits include a trimmed PIN CONNECTION (TOP VIEW) oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totempole output ideally suited for driving a power MOSFET.
Protection circuitry includes built undervoltage lockout and current limiting.
The UC3842A-BW and UC3844A-BW have UVLO thresholds of 16 V (on) and 10 V (off).
The corresponding thresholds for the UC3843A-BW/45A-BW are 8.
4V (on) and 7.
6V (off).
The UC3842A-BW and UC3843A-BW can operate within 100% duty cycle.
The UC3844A-BW and UC3845A-BW can operate within 50% duty cycle.
The UC384XA-BW has Start-Up Current 0.
1...


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