MAX20446ATG/V+

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The MAX20446ATG/V+ is an integrated PMIC-LED driver that provides efficient, robust, and space-saving LED supply power. Designed for automotive, IoT, and general industry applications, this device enables direct constant-current regulation of up to 12 LEDs from a narrow input voltage range of 2.7 V to 5.5 V, without the need for external components. Its low-noise converter topology allows for excellent min/max LED current linearity, delivering~1.25% max LED current ripple and ~3% max current accuracy. In addition, the MAX20446ATG/V+ provides short-circuit, thermal overload protection along with automatic load disconnect, and hiccup-mode current-limit protection.

The MAX20446ATG/V+ application field can be used in automotive, IoT, and general industry applications. This PMIC-LED driver is used for automotive, automotive signal, and automotive backlighting applications such as front and rear lighting, instrument panels, rearview mirrors, door-trim lighting, floor lighting, interior lighting, and turn signal lighting. In IoT applications, it can be used for dust-sensor, wearable, health-monitoring, smart home, and automotive-infotainment applications.

The MAX20446ATG/V+ working principle is based on a low-noise converter topology that provides direct constant-current regulation of up to 12 LEDs. This converter topology enables a wide input voltage range of 2.7 V to 5.5 V, without the need for external components. It also enables excellent min/max LED current linearity, delivering a ~1.25% max LED current ripple and ~3% max current accuracy. In addition, the device features short-circuit, thermal overload protection along with automatic load disconnect, and hiccup-mode current-limit protection.

The MAX20446ATG/V+ operates with a constant-current drive for optimum efficiency and to support a wide dynamic range for improving LED illumination. It provides an efficient linear regulation of up to 12 high-power LEDs from a narrow input voltage range of 2.7 V to 5.5 V. This device also enables LED dimming control to reduce the LED brightness without impairing device performance. This dimming can be achieved either by changing the sense voltage, or by changing the frequency of the oscillator within defined limits.

The MAX20446ATG/V+ is provided in 8×8 mm, 0.5 mm pitched QFN packages and is qualified over the -40°C to 125°C temperature range. This PMIC-LED driver also features an over-temperature protection, short-circuit protection, under-voltage lockout protection, overload protection, and hiccup-mode current-limit protection. These features make the MAX20446ATG/V+ ideal for space-constrained applications needing increased efficiency, robustness, and dimming capabilities.

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