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HA17385HRP Datasheet(PDF) 11 Page - Hitachi Semiconductor |
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HA17385HRP Datasheet(HTML) 11 Page - Hitachi Semiconductor |
11 / 31 page HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP 11 Timing Chart Waveform timing (Outline) Signal Name Input voltage VIN Pin 7 UVL1 Internal signal which cannot be externally monitored. Reference voltage Vref Pin 8 UVL2 Internal signal which cannot be externally monitored. Oscillation voltage of triangular wave RT/CT Pin 4 Start up signal Internal signal which cannot be externally monitored. PWM latch setting signal internal signal which cannot be externally monitored. Error amplifier input signal VFB Pin 2 Error amplifier output signal VCOMP Pin 1 ID *1 OVP latch signal Internal signal which cannot be externally monitored. Power ON IC turn ON Stationary operation OVP input OVP latched condition Power OFF Reset of OVP latch Start up latch release ( ) shows the case using HA17385H PWM output voltage VOUT Pin 6 Note: 1. ID indicates the power MOSFET drain current; it is actually observed as voltage VS generated by power MOSFET current detection source resistance RS. VCOMP indicates the error amp output voltage waveform. Current mode operation is performed so that a voltage 1/3 that of VCOMP is the current limiter level. 10 V (7.6 V) 7.0 V 2 V 16 V (8.4 V) 2 V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 5 V 4.7 V 2.8 V 1.2 V 7.0 V typ (OVP input) VCOMP ID VIN 4.7 V IC operates and PWM output stops. This voltage is determined by the transformer |
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Similar Description - HA17385HRP |
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