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NCP1562A Datasheet(PDF) 4 Page - ON Semiconductor |
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NCP1562A Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 26 page NCP1562A, NCP1562B http://onsemi.com 4 PIN FUNCTION DESCRIPTION (continued) Pin Symbol Description 15 OUT1 Main output of the PWM Controller. OUT1 has a source resistance of 4.0 Ω (typ.) and a sink resistance of 2.5 Ω (typ.). OUT1 is designed to handle up to 2.5 A. OUT1 trails OUT2 during a low to high transition and leads OUT2 during a high to low transition. 16 VAUX Positive input supply. This pin connects to an external capacitor for energy storage. An internal current source supplies current from Vin to this pin. Once the voltage on VAUX reaches approximately 10.3 V, the current source turns OFF and the outputs are enabled. It turns ON again once VAUX falls to 8.0 V. If the bias current consumption exceeds the startup current, VAUX will continue to discharge. Once VAUX reaches 7.0 V, the outputs are disabled allowing VAUX to charge. During normal operation, power is supplied to the IC via this pin by means of an auxiliary winding. The startup circuit is disabled once the voltage on the VAUX pin exceeds 10.3 V. If the VAUX voltage drops below 1.2 V (typ), the startup current is reduced to 200 mA. |
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Similar Description - NCP1562A |
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