NCP1562BDBR2G datasheet(4/26 Pages) ONSEMI

Part #	NCP1562BDBR2G

Description	High Performance Active Clamp/Reset PWM Controller

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP1562A, NCP1562B

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4

PIN FUNCTION DESCRIPTION (continued)

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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