UC2843BD

high performance fixed frequency current mode controller, 30mA, 30V, 500 kHz, SOP

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Price:: US $0.30~0.50 / piece [Get Latest Price]

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	US $0.30~0.50

PartNumber:: UC2843BD

Brand:: ON Semiconductor - ON | Pack: SOP | D/C: 12+

Availability:: Supply Ability: 10000/Week Can Ship Immediately
Delivery: 10-15 Business Days (ships out within 3 Business days)

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Products Upload time: 2012-11-13

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Product Summary

The UC2843BD is a high performance fixed frequency current mode controller. The UC2843BD is specifically designed for Off-Line and DC-DC converter applications offering the designer a cost-effective solution with minimal external components. Theseintegrated circuits feature a trimmed oscillator for precise duty cyclecontrol, a temperature compensated reference, high gain erroramplifier, current sensing comparator, and a high current totem poleoutput ideally suited for driving a power MOSFET. The UC2843BD has UVLO thresholds of 16 V (on) and 10 V (off),ideally suited for off-line converters.

Parametrics

UC2843BD absolute maximum ratings: (1)Bias and Driver Voltages (Zero Series Impedance, see also Total Device spec)VCC, VC: 30V; (2)Total Power Supply and Zener Current(ICC + IZ): 30mA; (3)Output Current, Source or SinkIO: 1.0A; (4)Output Energy (Capacitive Load per Cycle)W: 5.0mJ; (5)Current Sense and Voltage Feedback InputsVin: 0.3 to + 5.5V; (6)Error Amp Output Sink CurrentIO: 10mA.

Features

UC2843BD features: (1)Trimmed Oscillator for Precise Frequency Control; (2)Oscillator Frequency Guaranteed at 250 kHz; (3)Current Mode Operation to 500 kHz; (4)Automatic Feed Forward Compensation; (5)Latching PWM for Cycle-By-Cycle Current Limiting; (6)Internally Trimmed Reference with Undervoltage Lockout; (7)High Current Totem Pole Output; (8)Undervoltage Lockout with Hysteresis; (9)Low Startup and Operating Current; (10)Pb-Free Packages are Available.