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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC622 датащи(PDF) 1 Page - Semtech Corporation |
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SC622 датащи(HTML) 1 Page - Semtech Corporation |
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1 / 21 page  POWER MANAGEMENT 1 SC622 LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and SemWireTM Interface © 2009 Semtech Corporation Features Input supply voltage range — 3.0V to 5.5V Charge pump modes — 1x, 1.5x and 2x Flash LED — 400mA max in flash mode, 250mA max continuous for spotlight Two programmable 200mA low-noise LDO regulators Charge pump frequency — 250kHz SemWireTM single wire interface — up to 75kbit/s External flash control pin to sync with camera Optional 1s flash time out Automatic sleep mode (LEDs off ) — I Q = 100μA Low shutdown current — 0.1μA (typical) Ultra-thin package — 3mm x 3mm x 0.6mm Lead-free and halogen-free WEEE and RoHS compliant Applications Cellular phone flash PDA flash Camera I/O and core power Description The SC622 is a high efficiency charge pump LED driver using Semtech’s proprietary mAhXLifeTM technology. Performance is optimized for use in single-cell Li-ion battery applications. The charge pump provides continuous or bursted current to a flash LED using a dedicated flash driver current sink. The load and supply conditions determine whether the charge pump operates in 1x, 1.5x, or 2x mode. A flash- timeout feature disables the flash if active for longer than 1 second. The SC622 also provides two low-dropout, low- noise linear regulators for powering a camera module or other peripheral circuits. The SC622 uses the proprietary SemWireTM single wire interface. The interface controls all functions of the device, including flash current and two LDO voltage outputs. The single wire implementation minimizes microcontroller and interface pin counts. The flash/spotlight output is triggered via either the SemWire interface or a dedicated pin. In sleep mode, the device reduces quiescent current to 100 μA while continuing to monitor the serial interface. The two LDOs can be enabled when the device is in sleep mode. Total current reduces to 0.1μA in shutdown. SC622 VIN SWIF FLEN BYP AGND PGND VOUT FL CIN 2.2μF LDO1 GREF C1+ SemWire Interface Flash Control VLDO1 = 2.5V to 3.3V VLDO2 = 1.5V to 1.8V VBAT CBYP 22nF COUT 4.7μF CLDO2 1.0μF CLDO1 1.0μF C2 2.2μF C1 2.2μF LDO2 C2+ C1- C2- FLASH US Patents: 6,504,422; 6,794,926 Typical Application Circuit October 20, 2009 |
Аналогичный номер детали - SC622 |
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Аналогичное описание - SC622 |
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