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FAN5606DMPX Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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FAN5606DMPX Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 9 page www.fairchildsemi.com REV. 1.0.3 1/7/05 VOUT CIN VExternal 4.7 µF L = 6.8 µH IN GND A IND V IN V OUT CAT B R 2.7V to 5.5V VOUT CIN 4.7 µF 2.7V to 5.5V DAC Inputs L = 6.8 µH IN GND A IND V IN CAT B Features • Drives Up to Six LEDs in Series • Pulse Skip PWM Mode of Operation of the Boost Circuit • Up to 90% Peak Efficiency • No External Schottky Diode Required • Up to 25mA Output • Built-in DAC for Digital Brightness Control • LED’s Current Can be Duty-Cycle-Modulated • Digital, Analog, and PWM Brightness Control • 2.7V to 5.5V Input Voltage Range • 0.5MHz Operating Frequency (8MHz internal clock) • Soft Start • Low Shutdown Current: ICC < 1µA • LED Short Circuit Protection • Minimal External Components Needed • Available in an 8-lead MLP Package Applications • Cell Phones • Handheld Computers • PDAs, DSCs, MP3 Players • Keyboard Backlights • LED Display Description The FAN5606 LED driver generates regulated output cur- rents from a battery with input voltage varying between 2.7V to 5V. An internal NMOS switch drives an external inductor, and a Schottky diode delivers the inductor’s stored energy to the load. Soft start circuitry prevents excessive current drawn from the supply during power on. Any number of LEDs can be connected in series as long as the summed forward volt- ages do not lead to exceeding the specified operating output voltage range. In the FAN5606 device, the internal two-bit D/A converters provide programmability of the output channel current. Analog programming of the output current is also possible in the FAN5606. To do this, ground the “B” pin and connect a resistor between the “A” pin and a fixed supply voltage. The output current can then be programmed to any desired value within its specified range. The analog version uses a single external resistor to set the current, and to turn the device ON and OFF. The device is available in an 8-lead MLP package. FAN5606 Serial LED Driver with Current-Regulated, Step-Up DC/DC Converter Typical Applications Digital Brightness Control Analog Brightness Control |
Similar Part No. - FAN5606DMPX |
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