UC2844BDR2G

The UC2844BDR2G is a high performance current mode controller in 14 pin SOIC package. This is a high performance fixed frequency current mode controller. It is specifically designed for off-line and dc-dc converter applications offering the designer a cost effective solution with minimal external components. This integrated circuit features 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. It also included are protective features consisting of 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 from 50% to 70%. It has UVLO thresholds of 16V (on) and 10V (off) ideally suited for off-line converter.

• Trimmed oscillator for precise frequency control
• Oscillator frequency of 250KHz
• Current mode operation to 500KHz output switching frequency
• 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 start-up and operating current

Applications

Power Management

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Notes

It contains ESD protection and exceeds the following tests, human body model 4000 V per JEDEC standard JESD22-A114B, machine model method 200 V per JEDEC standard JESD22-A115-A.