Especificações Técnicas

THE SY8284 DEVELOPS A HIGH EFFICIENCY SYNCHRONOUS STEP-DOWN DC/DC REGULATOR CAPABLE OF DELIVERING 4A CURRENT OVER A WIDE INPUT VOLTAGE RANGE OF 4V TO 23V. SILERGY-S PROPRIETARY INSTANT-PWM- FAST-RESPONSE, CONSTANT-ON-TIME (COT) PWM CONTROL METHOD SUPPORTS HIGH INPUT/OUTPUT VOLTAGE RATIOS (LOW DUTY CYCLES), AND FAST TRANSIENT RESPONSE MAINTAINING A NEAR CONSTANT OPERATING FREQUENCY OVER LINE, LOAD AND OUTPUT VOLTAGE RANGES.   THIS CONTROL METHOD PROVIDES STABLE OPERATION WITHOUT COMPLEX COMPENSATION AND EVEN WITH LOW ESR CERAMIC CAPACITORS. INTERNAL 85M- POWER AND 35M- SYNCHRONOUS RECTIFIER SWITCHES PROVIDE EXCELLENT EFFICIENCY OVER A RANGE OF APPLICATIONS, ESPECIALLY FOR LOW OUTPUT VOLTAGES AND LOW DUTY CYCLES. SY8284 ALSO INTEGRATES A BYPASS SWITCH WHICH ALLOWS THE IC TO BE POWERED BY EXTERNAL DC SOURCE.   CYCLE-BY-CYCLE CURRENT LIMIT, INPUT UNDER VOLTAGE LOCK-OUT, INTERNAL SOFT-START, OUTPUT UNDER VOLTAGE PROTECTION AND OVER VOLTAGE PROTECTION, AND THERMAL SHUTDOWN PROVIDE SAFE OPERATION IN ALL OPERATING CONDITIONS. THE SY8284 IS AVAILABLE IN A COMPACT QFN3×3-20 PACKAGE.   FEATURES - LOW RDS(ON) FOR INTERNAL SWITCHES (TOP/BOTTOM): 85/35M- - WIDE INPUT VOLTAGE RANGE: 4~23V - INSTANT PWM ARCHITECTURE TO ACHIEVE FAST TRANSIENT RESPONSES - INTERNAL 600µS SOFT-START LIMITS THE INRUSH CURRENT - PSEUDO-CONSTANT FREQUENCY: 500KHZ - 4A OUTPUT CURRENT CAPABILITY - ±1% INTERNAL REFERENCE VOLTAGE - OPTIONAL BYPASS INPUT - POWER GOOD INDICATOR - OUTPUT DISCHARGE FUNCTION - OUTPUT CURRENT LIMIT PROTECTION - LATCH OFF MODE OUTPUT UNDER VOLTAGE PROTECTION - LATCH OFF MODE OUTPUT OVER VOLTAGE PROTECTION - PROGRAMMABLE BOTTOM FET CURRENT LIMIT - INPUT UNDER VOLTAGE LOCK-OUT(UVLO) - LATCH OFF MODE OVER TEMPERATURE PROTECTION - ROHS COMPLIANT AND HALOGEN FREE - COMPACT PACKAGE: QFN3×3-20   APPLICATIONS - LCD-TV/NET-TV/3DTV - SET TOP BOX - NOTEBOOK - HIGH POWER AP SY8284RAC HIGH EFFICIENCY FAST RESPONSE 4A 23V INPUT MAIORES DETALHES DE SY8284RAC NO SITE DO FABRICANTE: HTTPS://WWW.SILERGY.COM/ZH/DOWNLOAD/DOWNLOADFILE?ID=3858&TYPE=PRODUCT&FTYPE=DATA TAGS DE SY8284RAC: SY8204C, SY8284RAC, SY8284BL, SY8284B, SY8284CRAC, SY8284C, SY8284BRAC, BIEAQC, B1EAQC, BLEAQC, BIDCDA, HIGH EFFICIENCY FAST RESPONSE, 4A, 23V INPUT SYNCHRONOUS STEP DOWN REGULATOR

Informações Adicionais