Charge pump for White LED
|Rev. 1.2 (1.27MB)
RN5T659 contains a constant frequency charge pump, which is optimized for White LED application.
Output enable/disable, LEDs current and LDOs ON/OFF are individually controllable through single wire serial pulse I/F.
- White LED Charge Pump
- Current capability: Up to 115mA
- 1x/1.33x/1.5x switchable charge pump mode
- Power up five LEDs for backlight: Up to 23mA/LED
- Luminance control with 32steps from 0.25mA to 23mA
- Power Supply Function
- LDO (150mA) × 2 (ON/OFF control through single wire serial pulse I/F)
- LDO output voltage is settable in 0.05V step in range of 1.2V to 3.3V
- Over current protection (All Regulators) and thermal shutdown
- Short-circuit protection
- 20pin QFN package (Body size: 3.0 x 3.0 x 0.75mm, Pin pitch 0.4mm)
- ・Wireless Handset
- ・MP3 players, PDA
- ・Digital Still Cameras
- ・Portable GPS
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