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UC3844N Current Mode Controller IC Motorola

UC3844N Current Mode Controller IC Motorola

Manufacturer: Motorola
Part Number: UC3844N

Price: $1.80
200 available for immediate delivery
Code: IC442PE01
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Additional Information


Current Mode Controllers

FEATURES:
Current Mode Operation to 500 kHz Output Switching Frequency
Automatic Feed Forward Compensation
Internally Trimmed Reference with Undervoltage Lockout
Input Undervoltage Lockout with Hysteresis
Low Start up and Operating Current
Direct Interface with ON Semiconductor SENSEFET Products

The UC3844N is a high performance, fixed frequency current mode controller. They were specifically designed for Off-Line and dc-to-dc converter applications.These integrated circuits feature an oscillator, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.

Protective features include input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, a latch for single pulse metering, and a flip-flop which blanks the output off every other oscillator cycle, allowing output dead times to be programmed for 50% to 70%.

MAXIMUM RATINGS:
Total Power Supply and Zener Current: 30mA
Output Current, Source or Sink: 1.0A
Output Energy (Capacitive Load per Cycle): 5.0uJ
Current Sense and Voltage Feedback Inputs: -0.3V to 5.5V
Error Amp Output Sink Current: 10mA
Power Dissipation and Thermal Characteristics
- Maximum Power Dissipation @ TA = 25C: 862mW
- Thermal Resistance Junction-to-Air: 145C/W
Operating Junction Temperature: 150C
Operating Ambient Temperature: 0C to 70C

Manufactured by: Motorola
Part Number: UC3844N

Full Datasheet: UC3844N