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FAN5612

Fairchild Semiconductor
Part Number FAN5612
Manufacturer Fairchild Semiconductor
Description Low-Dropout LED Drivers
Published Mar 30, 2005
Detailed Description www.fairchildsemi.com FAN5611/FAN5612/FAN5613/FAN5614 Low-Dropout LED Drivers for White, Blue or any Color LED Features...
Datasheet PDF File FAN5612 PDF File

FAN5612
FAN5612

Overview
www.
fairchildsemi.
com FAN5611/FAN5612/FAN5613/FAN5614 Low-Dropout LED Drivers for White, Blue or any Color LED Features • LED Drivers for parallel-connected LEDs • Ultra-low voltage drop (< 300mV) to support direct Li-ion applications • No EMI, no switching noise • No external components needed for current matching • Both analog and PWM brightness control • FAN5611, FAN5613 feature up to 160mA bias current (up to 40mA for each LED) • FAN5612 features up to 120mA bias current (up to 40mA for each LED) • FAN5614 features up to 160mA bias current (up to 80mA for each LED) • Enable/Shutdown control (FAN5612, FAN5613, FAN5614) • Shutdown current < 1µA • Small footprint SC-70 and 2x2 MLP General Description The FAN5611/FAN5612/FAN5613/FAN5614 driver family provides matched current source bias for white, blue or any color LEDs.
The current in the LEDs can be programmed by an external resistor.
The individual LED currents are 200 x ISET, where ISET is the current through the external resistor connected to the CTRL pin.
The FAN5611 and the FAN5613 are capable of driving four LEDs, while the FAN5612 can drive three LEDs.
The FAN5614 is designated to drive two high current LEDs.
In any case, at least I1 should be always connected to an LED in order to have the other LEDs driven with a matched current to I1.
The FAN5612, FAN5613 and FAN5614 have Enable pin.
When these devices are disabled, the supply current drops to less than 1µA.
The FAN5611, FAN5612 and FAN5614 drivers are available in a 6-lead SC-70 package.
The FAN5613 is available in an 8-lead MLP package.
Applications • • • • • • Cell Phones PDA, DSC, MP3 Players Handheld Computers LCD Display Modules Keyboard Backlight LED Displays Typical Applications VIN VIN VIN ISET VCONTROL (3V) RSET I4 CTRL I3 I2 I1 VCONTROL (3V) ISET RSET ENABLE I3 CTRL ON/OFF I2 I1 ISET VCONTROL (3V) RSET ENABLE I4 CTRL ON/OFF I3 I2 I1 FAN5611 GND FAN5612 GND FAN5613 GND Four Diode Control Three Diode Control with ON/OFF F...


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