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B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 BlueChips Technology.

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Presentation on theme: "B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 BlueChips Technology."— Presentation transcript:

1 B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 BlueChips Technology A Premier Design Solutions Company ….. DC/DC Controller for High Current LED Camera Flash BCT 3521Q DC/DC Controller for High Current LED Camera Flash BCT 3521Q

2 B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 The Features: BCT 3521Q On chip DC/DC converter with current mode control Maximum continuous DC current: 350mA Maximum pulsed output current: 450mA (Duration < 200mS) Integrated thermal protection circuit O/P current adjustable by external resistor at pin CS On Chip Oscillator Low power consumption Wide operation temperature: -20 0 C to 70 0 C Available in QFN16L package (3mm x 3mm) Applications: Camera flash in mobile phone, PDAs Camera flash in low end digital camera Emergency light, Flash Light

3 B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 System Advantages: High Output dc current: 350mA High Output pulsed current: 450mA High Output pulsed current: 450mA Charge Pump vs. PWM controller One 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. 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) Current regulator (irrelevant to the LED forward voltage) High efficiency and lower power consumption Extend the battery life Extend the battery life

4 B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 Camera Phone with LED Flash Sanyo SCP5300 Motorola V690 Sony Ericsson SC003 Siemens SL65

5 B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 The performance Without Flash With Flash

6 B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 BCT3521Q Application One Current Setting 10 F VOUT GND VIN FLASH CS C1PC1N C2P C2N BCT3521Q 1~10 F SHDNB LED Flash MCU I/O 10 F 8, 95, 6 12 2 10 F 3.6V Re-chargeable Lithium-ion Battery LED ON LED OFF 0.01 ~ 0.2Sec 1 ~ 3 Sec

7 B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 BCT3521Q Application Two Current Settings LED ON LED OFF 0.01 ~ 0.2Sec 1 ~ 3 Sec M2 ON M1 OFF 3.6V Re-chargeable Lithium-ion Battery 10 F VOUT GND VIN FLASH CS C1PC1N C2P C2N BCT3521Q 1~10 F SHDNB LED Flash MCU ON /OFF Current 1 Current 2 10 F 8, 95, 6 12 2 10 F M2 M1 I/O

8 B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 BCT 3511S Status E/S: Available NOW Demo board: Available NOW Production: Now

9 B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 LED vs Xenon Flash LED FlashXenon Flash Minimal External Components I. 2x 0805 1uF ceramic cap ~US0.01 II. Output Filter capacitor I. External MOSFET / BJT ? ~US0.12 Volume 1.3mm3 Recycle Time No3 ~ 4 sec Resvior capacitor No need 10uF 10V filter capacitor 0.5 ~ 1.5 mm3 8uF ~ 35uF 330V Angle of light coverage 20 ~ 25 deg Thermal Protection Yes (@110 deg C)May have EMI Interference Good, can be used in RF applicationNoise Efficiency 60 ~85 %75 ~ 85% Package SOP14SOP8 System Cost $$$$$$$

10 B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 Flash light Control One shot Flash Correct exposure value at 2 ~ 6 points Correct exposure value at 2 ~ 6 pointsPre-flash Continuous Mode

11 B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Solid State Lighting B L U E CHIPS w w w. b l u e c h i p s t e c h. c o m Jan2005 Thank You ! Questions & Answer


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