The TPS60231 is a white LED charge pump current source with PWM brightness control, which provides a constant current for each LED and the initial value can be set by an external resistor. The operating input voltage range is 2.7V to 6.5V and it is ideal for all applications powered by a single LI-Ion battery cell or three to four NiCd, NiMH, or alkaline battery cells.
The TPS60231 is a white LED charge pump designed for backlight and keypad applications. It provides a regulated current per LED (up to 25 mA) and supports PWM dimming. The device operates from 2.7 V to 6.5 V and switches at 1 MHz, offering high efficiency in a compact 3 mm × 3 mm QFN package.
Typical applications include color display backlights for mobile phones, PDAs, digital cameras, and camcorders, as well as keypad illumination. The data sheet includes electrical characteristics, pin assignments, recommended operating conditions, and layout guidelines.
| Input voltage range | 2.7 V to 6.5 V |
|---|---|
| Switching frequency | 1 MHz |
| Operating temperature range | 40 °C to 85 °C (free‑air) |
The device operates from 2.7 V up to 6.5 V.
The charge pump switches at 1 MHz.