MAX16821A/MAX16821B/MAX16821C are pulse-width-modulation (PWM) LED driver controllers with high output current capability and a compact package with a minimum number of external components.
The MAX16821A, MAX16821B and MAX16821C are high‑power synchronous HBLED driver controllers that provide up to 30 A of LED current in a compact package with minimal external components. They support both buck and boost operation, selectable via a MODE input, and include a 180° out‑of‑phase clock output for driving a second LED driver.
The devices operate from a 4.75 V‑5.5 V input when the internal LDO is disabled or from 7 V‑28 V when enabled, and feature programmable over‑voltage protection, thermal shutdown, and a wide switching‑frequency range of 125 kHz to 1.5 MHz. Detailed pin descriptions, electrical characteristics, and package information are provided for designers.
| Maximum Output Current | 30 A |
|---|---|
| Input Voltage Range (LDO disabled) | 4.75 V to 5.5 V |
| Input Voltage Range (LDO enabled) | 7 V to 28 V |
| Switching Frequency Range | 125 kHz to 1.5 MHz |
| Operating Temperature Range | -40 °C to +125 °C |
| Package Type | 28‑pin TQFN‑EP |
The devices can deliver up to 30 A of LED current.
The switching frequency is programmable from 125 kHz to 1.5 MHz.
The devices include programmable over‑voltage protection, thermal shutdown, and non‑latching output over‑voltage protection.