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UC3842BP-D08-T Arkusz danych(PDF) 1 Page - Unisonic Technologies |
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UC3842BP-D08-T Arkusz danych(HTML) 1 Page - Unisonic Technologies |
1 / 11 page UNISONIC TECHNOLOGIES CO., LTD UC3842B/3843B LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of 11 Copyright © 2008 Unisonic Technologies Co., Ltd QW-R103-012.D 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 8.4V(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 Lead-free: UC3842BL UC3843BL Halogen-free: UC3842BP UC3843BP ORDERING INFORMATION Ordering Number Normal Lead Free Halogen Free Package Packing UC3842B-D08-T UC3842BL-D08-T UC3842BP-D08-T DIP-8 Tube UC3842B-S08-R UC3842BL-S08-R UC3842BP-S08-R SOP-8 Tape Reel UC3843B-D08-T UC3843BL-D08-T UC3843BP-D08-T DIP-8 Tube UC3843B-S08-R UC3843BL-S08-R UC3843BP-S08-R SOP-8 Tape Reel |
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