The A8430 is a 2.5 V to 10 V input white LED driver constant current step-up converter that provides up to 36 V of programmable constant current output for driving white LEDs in series.
The A8430 is a non‑inverting boost converter that steps up 2.5 V‑10 V input to a programmable constant‑current output for white LEDs. It can drive up to four LEDs at 20 mA from a 2.5 V source, five LEDs from 3 V, and up to seven LEDs when the supply voltage is raised to 10 V. The device integrates a power switch and feedback amplifier, requiring only a sense resistor to set the LED current.
Key features include a 1.2 MHz switching frequency, 300 mA switch‑current limit, 95 mV feedback reference, and a 5‑pin 3 mm × 3 mm MLP package. The datasheet provides electrical characteristics, pin functions, application guidelines, component selection, dimming methods (PWM or voltage‑modulation), over‑voltage protection, and layout recommendations.
| Output voltage | up to 36 V |
|---|---|
| Input voltage range | 2.5 V to 10 V |
| Switch current limit | 300 mA |
| Switching frequency | 1.2 MHz |
| Shutdown current | 1 µA |
| Feedback reference voltage | 95 mV |
| Enable input low threshold | 0.4 V |
| Enable input high threshold | 1.5 V |
| Package | 5‑pin 3 mm × 3 mm MLP |
It can drive up to four LEDs at 20 mA from a 2.5 V source, up to five LEDs from 3 V, and up to seven LEDs when the supply voltage is increased to 10 V.
The output current is set by adjusting a single external sense resistor.
The device operates at a switching frequency of 1.2 MHz.