IZ1937 Description
The IZ1937 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive two, three or four LEDs in series from a Li-Ion battery. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors.
IZ1937 Key Features
- Internally determined LED current
- High Efficiency: 84% Typical
- Drives Up to 4 LEDs from a 3.2V Supply
- Drives Up to 6 LEDs from a 5V Supply
- 36V rugged bipolar switch
- Fast 1.2MHz switching frequency
- Uses tiny 1mm Tall Inductors
- Requires only 0.22uF output capacitor
- error amplifier; A2
- addrer; A3