The APW7008 is a high efficiency charge pump white LED driver; the device drives up four white LEDs with regulated constant current for uniform intensity.

FeaturesQjg嘉泰姆

±1.5% LED Current MatchingQjg嘉泰姆

High Efficiency Up to 90% Over Li-ion BatteryQjg嘉泰姆

DischargeQjg嘉泰姆

Output Current Up to 30mA per LEDQjg嘉泰姆

2.7V to 5.5V Operating VoltageQjg嘉泰姆

Allow to Turn On or Off a Combination of LEDsQjg嘉泰姆

1x/1.5x/2x Charge Pump ModesQjg嘉泰姆

Low Shutdown Current: 2µA MaximumQjg嘉泰姆

Low Input Ripple and EMIQjg嘉泰姆

Internal Soft-Start Limits Inrush CurrentQjg嘉泰姆

Short Circuit Current-LimitQjg嘉泰姆

Thermal Shutdown ProtectionQjg嘉泰姆

Output Over-Voltage ProtectionQjg嘉泰姆

3mmx3mm 16-Pin QFN (QFN3X3-16) PackageQjg嘉泰姆

Lead Free and Green Devices AvailableQjg嘉泰姆

(RoHS Compliant)Qjg嘉泰姆

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General DescriptionQjg嘉泰姆

The APW7008 is a high efficiency charge pump whiteQjg嘉泰姆

LED driver; the device drives up four white LEDs withQjg嘉泰姆

regulated constant current for uniform intensity. The sup-Qjg嘉泰姆

ply voltage ranges from 2.7V to 5.5V and it is optimized forQjg嘉泰姆

a Li-ion battery application. The APW7008 operates in 1x,Qjg嘉泰姆

1.5x, and 2x charge pump modes and automaticallyQjg嘉泰姆

switches the charge pump modes depend on the inputQjg嘉泰姆

voltage to maintain the required power for high powerQjg嘉泰姆

efficiency. The APW7008 provides up to 30mA per LEDQjg嘉泰姆

for a total of 120mA and allows several methods, such asQjg嘉泰姆

a PWM signal on the CTRL0 pin for LED dimming. ThreeQjg嘉泰姆

control logic pins allow to disable or enable a combina-Qjg嘉泰姆

tion of LEDs. The supply current is only 2mA in 2x mode,Qjg嘉泰姆

and the EN pin allows the device to enter shutdown modeQjg嘉泰姆

with 2µA quiescent current. The APW7008 switches atQjg嘉泰姆

1MHz frequency and only requires four 1µF ceramic ca-Qjg嘉泰姆

pacitors and one resistor, and ensures low input currentQjg嘉泰姆

ripple and EMI.Qjg嘉泰姆

The APW7008 is available in a 16-pin QFN package.Qjg嘉泰姆

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