NCP9003 is a high efficiency white LED boost driver, which is a current mode regulator based on a PFM mode to drive White LED. The current mode regulation allows a uniform brightness of the LEDs. The chip has been optimized for small ceramic capacitors, capable to supply up to 1.0 W output power.
This handbook describes the NCP9003 compact backlight LED boost driver, a high‑efficiency boost converter that operates in current‑loop mode to drive white LEDs. It includes features such as a wide input range, built‑in over‑voltage protection, dimming via PWM, and low standby current.
The document provides pin‑function descriptions, maximum ratings, electrical specifications, typical application circuits, and package dimensions. It also lists ordering information and safety notices for designers integrating the device into LED backlight or keyboard illumination designs.
| Input Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Output Voltage Compliance | up to 24 V (allows up to 5 LEDs in series) |
| Standby Quiescent Current | 0.3 µA |
| Power Dissipation (Ta = +85 °C) | 160 mW |
| Thermal Resistance (Junction‑to‑Air) | 250 °C/W |
| Maximum Junction Temperature | +150 °C |
The device operates from 2.7 V to 5.5 V input.
Up to five LEDs can be connected in series.
It includes built‑in over‑voltage protection, thermal shutdown protection, and full ESD protection on all pins.
The standby quiescent current is 0.3 µA.