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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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G5920 bảng dữ liệu(PDF) 1 Page - Global Mixed-mode Technology Inc |
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G5920 bảng dữ liệu(HTML) 1 Page - Global Mixed-mode Technology Inc |
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1 / 9 page  Ver: 0.4 Preliminary Feb 03, 2005 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G5920/G5921 Global Mixed-mode Technology Inc. Ultra Low-Dropout, Constant-Current White LED Bias Features Ultra Low 150mV Dropout at 20mA 0.6% High Accuracy Current Matching 20mA Full Scale Current 32 Level Linear Current Brightness Control PWM Brightness Control 2.5V to 5.5V Supply Voltage Range SOT-23-6 Package (G5920) MSOP-8 Package (G5921) Applications Mobile Phones White LED backlighting General Description The G5920/G5921 is a high performance ultra low- dropout constant current bias supply for white LEDs. It can be used as an alternative to the simple ballast resistors in conventional parallel white LEDs applica- tions. Each white LED bias current is matching to 0.6%. For dimming control, an enable input pin is controlled by processor GPIO output pulses for 32 level linear current. Using a low frequency PWM waveform to this enable input pin also controls the average LED current which is proportional to the PWM duty. The G5920/G5921 is suitable for single cell Li-ion bat- tery power device that using low forward voltage white LEDs. The white LEDs can be powered directly from battery without extra external components. This takes an advantage of highest efficiency and creates no EMI problem. Ordering Information ORDER NUMBER ORDER NUMBER (Pb free) MARKING TEMP. RANGE PACKAGE G5920TB1U G5920TB1Uf 5920x -40°C to 85°C SOT-23-6 G5921P8U G5921P8Uf 5921x -40°C to 85°C MSOP-8 Note:TB : SOT23-6 P8: MSOP-8 U: Tape & Reel Pin Configuration Typical Application Circuit EN VCC GND LED2 1 2 34 5 6 G5920 SOT-23-6 LED3 LED1 PWM Dimming Linear Current Dimming EN LED1 GND G5920 LED2 LED3 VCC V BAT 0.1µF EN LED1 GND G5920 LED2 LED3 VCC V BAT 0.1µF 8 6 5 1 2 3 4 LED3 LED1 LED2 MSOP-8 G5921 7 VCC N.C. GND LED4 EN EN VCC GND LED2 1 2 34 5 6 G5920 SOT-23-6 LED3 LED1 PWM Dimming Linear Current Dimming EN LED1 GND G5920 LED2 LED3 VCC V BAT 0.1µF EN LED1 GND G5920 LED2 LED3 VCC V BAT 0.1µF 8 6 5 1 2 3 4 LED3 LED1 LED2 MSOP-8 G5921 7 VCC N.C. GND LED4 EN |
Số phần tương tự - G5920 |
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Mô tả tương tự - G5920 |
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