The ZXLD1101 is a PFM inductive boost converter designed for driving 2, 3 or 4 series connected white LEDs from a Li-Ion cell and up to 8 LEDs from a 5V supply. The device operates from an input supply of between 2.5V and 5.5V and provides an adjustable output current of up to 50mA. The ZXLD1101 includes the output switch and peak current sense resistor, and can operate with a maximum output voltage of 28V. Quiescent current is typically 60μA and a shutdown function is provided to reduce this current to less than 500nA in the 'off' state.
The ZXLD1101 is a PFM inductive boost converter designed to drive white LEDs from a Li‑Ion cell or a 5 V supply. It operates from 2.5 V to 5.5 V, provides an adjustable output current up to 50 mA, and includes an internal switch, peak‑current sense resistor, and PWM‑dimming capability. The device is supplied in a 1 mm‑high TSOT23‑5 package.
Typical applications include mobile phones, digital cameras, PDAs, LCD modules and other portable electronics where a compact, efficient LED driver is required. Output current can be set by a PWM signal on the EN pin or by selecting a resistor value for the feedback network.
| Maximum output current | 50 mA |
|---|---|
| Maximum output voltage | 28 V |
| Switching frequency | up to 1 MHz |
| Power dissipation | 300 mW |
| Operating temperature range | -40 °C to 85 °C |
| Storage temperature range | -55 °C to 150 °C |
| Maximum junction temperature | 125 °C |
The output current is adjusted by applying a PWM control signal to the EN (Enable) pin or by selecting the feedback resistor R1.
The device is supplied in a TSOT23‑5 surface‑mount package with a maximum height of 1 mm.