RN5T649 is a constant frequency charge pump for white LED application. Its features include output enable/disable, LED current and LDO ON/OFF individually controllable through single wire serial pulse I/F.
The Ricoh RN5T649 is a CMOS integrated circuit designed specifically for White LED applications, particularly as a backlight driver. It features a constant frequency charge pump capable of driving up to four LEDs with a total current of 92mA, utilizing 1x, 1.33x, or 1.5x boost modes. The device also includes two Low Dropout (LDO) regulators, each providing up to 150mA of current with adjustable output voltages between 1.2V and 3.3V.
| Charge Pump Current Capability | Up to 92mA |
|---|---|
| LDO Output Current | 150mA |
| LDO Output Voltage Range | 1.2V to 3.3V |
| Package Type | 20pin QFN |
| Package Dimensions | 3.0 x 3.0 x 0.75mm |
| Operating Temperature Range | -40°C to +85°C |
| Process | CMOS |
The charge pump has a current capability of up to 92mA.
The device can power up to four LEDs for backlight.
The LDO output voltage is settable in the range of 1.2V to 3.3V.