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BM1P102FJ-E2 Datasheet(PDF) 11 Page - Rohm |
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BM1P102FJ-E2 Datasheet(HTML) 11 Page - Rohm |
11 / 31 page 11/27 Datasheet Datasheet BM1P105FJ TSZ02201-0F2F0A200170-1-2 2.Oct.2013.Rev.001 © 2013 ROHM Co., Ltd. All rights reserved. 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. When ACMONI pin voltage exceeds VACOMONI (1.0Vtyp), IC detects normal state, and IC starts switching operation. The release condition of this function is different by DC detection and AC detection. (Fig-13 shows AC detection method) In DC detection, ACMONI pin voltage is lower than VACMONI2(0.7V typ) after switching operation, the internal timer of IC starts to operate. When the status which ACMONI pin voltage is lower than VACMONI2 ( 0.7V typ ) continues for TACMONI1(typ=256ms), the switching operation stops. In AC detection, when the status which ACMONI pin voltage is lower than VACMONI1(1.0V typ) continues for TACMONI1(typ=256ms), the switching operation stops. For that, even if AC voltage temporary disappearance occurs, the switching operation continues within TACMONI1(typ=256ms) 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. VHstart=(RH+RL)/RL×VACMONI1 *VACMONI1=1.0V Please set RH and RL by the equation. Then brown-out protection voltage “VHend” is calculated by below equation. VHend=(RH+RL)/RL×VACMONI2 *VACMONI1=0.7V 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 |
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