Presentation on theme: "DC/DC Controller for High Current LED Camera Flash BCT 3521Q"— Presentation transcript:
1 DC/DC Controller for High Current LED Camera Flash BCT 3521Q BlueChips TechnologyA Premier Design Solutions Company…..DC/DC Controller forHigh Current LED Camera Flash BCT 3521QJan2005
2 The Features: BCT 3521QApplications: Camera flash in mobile phone, PDAsCamera flash in low end digital cameraEmergency light, Flash LightOn chip DC/DC converter with current mode controlMaximum continuous DC current: 350mAMaximum pulsed output current: 450mA(Duration < 200mS)Integrated thermal protection circuitO/P current adjustable by external resistor at pin CSOn Chip OscillatorLow power consumptionWide operation temperature: -200C to 700CAvailable in QFN16L package (3mm x 3mm)Jan2005
3 System Advantages: High Output dc current: 350mA High Output pulsed current: 450mACharge Pump vs. PWM controllerOne single configuration vs. complicate boost-buck PWM controller.Advanced Switching Capacitor Technologies No external MOSFET/ BJT, Coil-less, no schottky diode, low EMI, in-expensive external components.Multi source of LEDs Current regulator (irrelevant to the LED forward voltage)High efficiency and lower power consumptionExtend the battery lifeJan2005
4 Camera Phone with LED Flash Sanyo SCP5300Motorola V690Siemens SL65Sony Ericsson SC003Jan2005
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