The MAX16822A/MAX16822B step-down constant-current high-brightness LED (HB LED) drivers provide a cost-effective design solution for automotive interior/exterior lighting, architectural and ambient lighting, LED bulbs, and other LED illumination applications. They operate from a wide input-voltage range and support pulsed LED dimming and constant current control. They have excellent input supply rejection and fast response capability, supporting PWM dimming and negative temperature coefficient thermal-foldback feature.
The MAX16822A and MAX16822B are step‑down constant‑current high‑brightness LED drivers that operate from a 6.5 V to 65 V input range and deliver up to 350 mA of output current. They feature an integrated MOSFET, high‑side current‑sense resistor, and a PWM dimming input for pulsed LED control. The devices provide +3 % LED current accuracy, thermal‑foldback, and thermal‑shutdown protection, and they can switch at frequencies up to 2 MHz, allowing the use of small inductors.
These drivers are intended for automotive interior/exterior lighting, architectural and ambient lighting, heads‑up displays, indicator and emergency lighting, and other LED illumination applications. The 8‑pin SO package, wide operating temperature range (‑40 °C to +125 °C), and various protection features make them suitable for demanding environments.
| Input Voltage Range | 6.5 V to 65 V |
|---|---|
| Maximum Output Current | 350 mA |
| Switching Frequency | up to 2 MHz |
| Operating Temperature Range | -40 °C to +125 °C |
| Package | 8‑Pin SO |
| Current Ripple (MAX16822A) | 10 % |
| Current Ripple (MAX16822B) | 30 % |
The drivers operate from 6.5 V up to 65 V.
They can switch at frequencies up to 2 MHz.
Each driver can deliver up to 350 mA of LED current.