Features W flyback SMPS demonstration board for alarm system based on the L99 and STPNKZ Input voltage: Vin: Vac (f: Hz) Output voltages: Vout =. V, Iout = A Vout = V, Iout= ma Vout =. V, Iout = ma (.9 A peak) Output signals: AC input check Low battery check Description This demonstration board is a multioutput SMPS which can be used to supply an alarm system. The circuit is composed of an ACDC single output converter with an approximate power capability of W, while the other outputs are obtained by means of DCDC converters. The power supply also integrates a battery charger circuit in order to charge a standard SLA V battery. Data Brief June Rev / For further information contact your local STMicroelectronics sales office. www.st.com
Circuit schematic Circuit schematic Figure. Schematic diagram / F N F F U S E A C _ S IG N A L DIODE BRIDGE D C 9 PGND uf V C PGND C. n. V R k. V. V D N R R 9 k D S T T H R k C n R R t J C O N N T C o hm L m H. R R N k k R 9. K C u C n C n V Q B C R k R D STPSH R k C u n V C C. nf R k L 9 9 9 C u V C. n R R C p R k R K W R R R M S T P N K Z R. C n V T T R A N S F O R M E R T R A N S IL D C o ut u J C O N N A C C n J W IR E J U M P R k R.9 k t Varistor C. n U P C T L U C u C o ut u C n R k D /
Circuit schematic Figure. Schematic diagram / P W R O U T. V B A T T C H A R G E R IN U L /T O V IN V O U T V B A T T C H A R G E R O U T A C _ S IG N A L C o ut U C 9 uf V uf V M S T S P F L R k U V B A T T C H A R G E R O U T BATT FAILURE V AC FAILURE B A T T C H A R G E R O U T IB A T T _ M E A S U R E J C O N. V B A T T C H A R G E R IN BATT FAILURE AC FAILURE O U T. V. V V G N D nf C C u V C uf V Ceramic U R k L 9 C p T S M U R k C n R. K C nf R k C n C 9 p F L D uh A S T P S L U uh L D S T P S L U C n S W S W K E YS P D T R. K R. K C o ut uf V R s e ns e. R s e ns e. R k R. k R. k R k R 9. k D 9 D IO D E R k W C u V Q P C R 9 k B C A R k F F U S E /S M A R. W J 9 C O N J B A T T.C H A R G E R 9 /
Circuit schematic / Figure. Schematic diagram / PWR PWR PWR DC_IN VBATT BATT CHARGER OUT.V.V BATT CHARGER OUT VBATT DC_IN VBATT BATT_OK BATT_OK VREF VREF VREF VREF IBATT_CTRL IBATT_CTRL VBATT_CTRL VBATT_CTRL VDC_CTRL VDC_CTRL IBATT_MEASURE U TL U TL R k R k R.K R.K R k R k UA TS9 UA TS9 u vnpt u vnpt R.k R.k UB HCFB UB HCFB UA HCFB UA HCFB UB TS9 UB TS9 J9 CONA J9 CONA C n C n R9 k R9 k U STPSLC U STPSLC a a k R R J CONA J CONA R.k R.k R k R k C n C n C n C n UA HCFB UA HCFB u9 vnpt u9 vnpt R R R R UB HCFB UB HCFB R k R k UC HCFB UC HCFB 9
Revision history Revision history Table. Document revision history Date Revision Changes June Initial release. /
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