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HA17384 Datasheet(PDF) 13 Page - Hitachi Semiconductor |
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HA17384 Datasheet(HTML) 13 Page - Hitachi Semiconductor |
13 / 31 page HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP 13 Power OFF At power OFF, the input voltage of the transformer gradually decreases and then V IN of IC also decreases according to the input voltage. When V IN becomes lower than 10 V* 2 or Vref becomes lower than 4.7 V, UVL1 (UVL2) operates again and the PWM pulse stops. Note: 2. The value is for the HA17384S/H. The value is 7.6 V for the HA17385H. Commercial AC voltage Power switch Line filter Rectifier bridge diode DC output Floating ground Power MOSFET ex. 2SK1567 SBD ex. HRP24 OVP input (Ex: from photocoupler) 20k 3.6k 100 µ 200V 1000 µ 10V RT 10k VCS RB 220k 1/4W CB 10 µ 50V VIN 0.1 µ 51 1k − + B P S HRP32 Vref VIN OUT GND COMP FB HA17384H, HA17385H CS RT/CT + − + − + − + − RCS 1 2W 100p 150k 330p CT 3300p Figure 2 Mounting Circut Diagram for Operation Expression |
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Similar Description - HA17384 |
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