3-CHANNEL WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT)

The S-8813 Series is a PFM control charge pump DC-DC converter with a built-in constant-current circuit, and was developed using CMOS technology. Its constant current output makes this series ideal as a power supply for current drive LEDs.

The S-8813 Series features three output channels and can drive three LEDs.

This series is available in two types: a variable voltage type and a variable current setting resistance type.

Moreover, since small ceramic capacitors can be used as external capacitors (pump capacitors, input capacitors, output capacitors), the S-8813 Series contributes to set miniaturization.

Features

• PFM control CMOS charge pump

• Built-in constant-current circuit

• Power supply voltage: 2.7 V to 4.5 V

• Output current value: A current variable is possible between 5.0 mA and 18 mA

(At VIOUT1,2,3≤4.0 V, VIN=3.0 V)

Variable voltage type and Variable current setting resistance type are available.

• Terminal output current matching: ±1 max.

• Built-in soft start circuit: 1.5 ms typ.

• Constant current output pins: 3 channels, ±5 accuracy

• Oscillation frequency: 600 kHz typ.

• ON/OFF function provided (During standby: 1 µA max.)

• Ultra-small package: 10-Pin SON(B)

• Lead-free products

Applications

• Power supply for white LED display backlights

• Constant-current circuit

• Cellular phones and PDAs using 1-cell lithium batteries

• Power supply for flat panel displays