UC3844B - ON Semiconductor

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

UC3844B
Manufacturer

ON Semiconductor
ChipWorker Part#

CW234757692
RoHS

Lead free / RoHS Compliant
Description

High Performance Current Mode Controllers
Documentation

Datasheet

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UC3844B Specifications

Attribute	Attribute Value

Part Number	UC3844B
Manufacturer	ON Semiconductor
ChipWorker Part#	CW234757692
Documentation	Datasheet
	expand all
RoHS	RoHS Compliant

Product Description

High Performance Current Mode Controllers
The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and dc−dc converter applications offering the designer a cost−effective solution with minimal external components. These integrated circuits feature an oscillator, a temperaturecompensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.
Features
•Trimmed Oscillator for Precise Frequency Control
•Oscillator Frequency Guaranteed at 250 kHz
•Current Mode Operation to 500 kHz Output Switching Frequency
•Output Deadtime Adjustable from 50% to 70%
•Automatic Feed Forward Compensation
•Latching PWM for Cycle−By−Cycle Current Limiting
•Internally Trimmed Reference with Undervoltage Lockout
•High Current Totem Pole Output
•Undervoltage Lockout with Hysteresis
•Low Startup and Operating Current
•These Devices are Pb−Free and are RoHS Compliant
•NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable

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