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UC3842B Datasheet(PDF) 1 Page - Unisonic Technologies |
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UC3842B Datasheet(HTML) 1 Page - Unisonic Technologies |
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UTCUC3842B/3843B LINEARINTEGRATEDCIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R103-012,A HIGH PERFORMANCE CURRENT MODE CONTROLLERS DESCRIPTION The UTC UC3842B/3843B are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. The UC3842B has UVLO thresholds 16V (on) and 10V(off), ideally suited for off-line converters. The UC3843B is tailored for lower voltage applications having UVLO thresholds of 8.5V(on) and 7.6V(off). FEATURES *Trimmed Oscillator for Precise Frequency Control *Oscillator Frequency Guaranteed at 250kHz *Current Mode Operation to 500kHz *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 DIP-8 SOP-8 BLOCK DIAGRAM |
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