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TOP258LN Datasheet(PDF) 4 Page - Power Integrations, Inc. |
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TOP258LN Datasheet(HTML) 4 Page - Power Integrations, Inc. |
4 / 48 page Rev. F 01/09 4 TOP252-262 www.powerint.com Figure 3a. Functional Block Diagram (P and G Packages). Figure 3b. Functional Block Diagram (M Package). PI-4643-082907 SHUTDOWN/ AUTO-RESTART CLOCK CONTROLLED TURN-ON GATE DRIVER CURRENT LIMIT COMPARATOR INTERNAL UV COMPARATOR INTERNAL SUPPLY 5.8 V 4.8 V SOURCE (S) SOURCE (S) S R Q D MAX STOP SOFT START CONTROL (C) VOLTAGE MONITOR (V) - + 5.8 V I FB 1 V Z C V C + - + - + - LEADING EDGE BLANKING ÷ 16 1 HYSTERETIC THERMAL SHUTDOWN SHUNT REGULATOR/ ERROR AMPLIFIER + - DRAIN (D) ON/OFF DC MAX DC MAX 0 OV/ UV OVP V VI (LIMIT) CURRENT LIMIT ADJUST V BG + VT LINE SENSE SOFT START OFF F REDUCTION F REDUCTION STOP LOGIC EXTERNAL CURRENT LIMIT (X) OSCILLATOR WITH JITTER PWM K PS(UPPER) K PS(LOWER) SOFT START I FB I PS(UPPER) I PS(LOWER) K PS(UPPER) K PS(LOWER) PI-4508-120307 SHUTDOWN/ AUTO-RESTART CLOCK CONTROLLED TURN-ON GATE DRIVER CURRENT LIMIT COMPARATOR INTERNAL UV COMPARATOR INTERNAL SUPPLY 5.8 V 4.8 V K PS(UPPER) K PS(LOWER) SOURCE (S) SOURCE (S) S R Q D MAX STOP SOFT START CONTROL (C) MULTI- FUNCTION (M) - + 5.8 V I FB Z C V C + - + - + - LEADING EDGE BLANKING ÷ 16 1 HYSTERETIC THERMAL SHUTDOWN SHUNT REGULATOR/ ERROR AMPLIFIER + - DRAIN (D) ON/OFF DC MAX DC MAX 0 OV/ UV OVP V VI (LIMIT) CURRENT LIMIT ADJUST V BG + VT LINE SENSE SOFT START SOFT START I FB I PS(UPPER) I PS(LOWER) K PS(UPPER) K PS(LOWER) OFF F REDUCTION F REDUCTION STOP LOGIC OSCILLATOR WITH JITTER PWM |
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