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Datasheet

Datasheet

BM1P105FJ

TSZ02201-0F2F0A200170-1-2

2.Oct.2013.Rev.001

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www.rohm.com

TSZ22111・15・001

(4) ACMONI pin protection function

ACMONI(1pin) pin is for brown-out protection. When AC voltage falls, the brown-out function stops switching operation.

The usage is shown in Figure 13. The voltage divide AC voltage by resistors is applied to ACMONI pin.

The release condition of this function is different by DC detection and AC detection. (Fig-13 shows AC detection method)

period.

AC

85-265Vac

FUSE

+

-

ERROR

AMP

AC monitor

Discharge

Figure 13. Application circuit

The detection value of brown-out sets by external resistors of AMMONI pin.

The setting method is below:

○The setting : When AC line voltage is higher than the voltage “VHstart”, IC starts to operate

VHstart value is calculated by below equation.

Please set RH and RL by the equation.

Then brown-out protection voltage “VHend” is calculated by below equation.

When brown-out function does not use, ACMONI pin voltage needs to be set the voltage from 1.3V to 5.0V

As the applied method, apply from outside or apply the voltage divided resistors from VCC.

Np

Nb

Ns

Vout

Figure 14. The setting of ACMONI pin in the case not to use brown-out function

RH

RL