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Datasheet

Datasheet

BM2PX1A/BM2PX1B Series

TSZ02201-0F1F0A200100-1-2

22. Mar.2017.Rev.002

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TSZ22111・15・001

(3) VCC pin protection function

The IC has a built-in VCC low voltage protection function VCCUVLO (Under Voltage Lock Out), an over voltage

protection function VCCOVP (Over Voltage Protection), and a VCC recharge function that operates in case of a drop

in VCC voltage.

The VCC charge function stabilizes the secondary output voltage charging from high voltage lines by the start circuit

when the VCC voltage drops.

VCC UVLO / VCC OVP function

VCCUVLO is an auto recovery comparator with a voltage hysteresis. And VCCOVP is a latch Type or auto restart

Type comparator. (The type of a latch or auto restart is different by products series.)

showed about the time chart of VCC OVP latch Type

VCC charge function

This IC has the recharge function.

start circuit. Through this operation, BM2PXXA/BM2PXXB prevents failure.

Figure 4. VCC UVLO / OVP Timing Chart

A: The VH voltage input, VCC pin voltage starts rising.

rises.

switching is stopped by the VCCOVP function.

function.

G: The high voltage line VH is drops.

H: Same as C

I:

Same as D

J: