ROHM open drain-type LED drivers feature 16 channels for driving up to 16 lines at once. This enables support for a variety of LED systems, from monochrome and multicolor LEDs to 7-segment types and LED displays.

The internal Nch MOS transistor provides up to 80mA for each channel. Multiple channels can be combined (connected in parallel) to drive high power LEDs.

The voltage resistance of the LED driver terminals (MOS transistor) is 20V (max.). This allows 3 LEDs to be connected in series* (3.2V V_F). Utilizing all 16 channels makes it possible to drive up to 48 LEDs. Or 144 LEDs can be connected in parallel (48 × 3).

*1 : Up to 3 LEDs can be connected in series after taking into account the LED supply voltage and V_F variation of each LED.

The LED current for each channel can be set via external resistor to ensure uniform brightness.

The internal software-based PWM dimming function eliminates the need for PWM signal generation by the microcontroller (for dimming). Only digital instructions are required, making it unnecessary for the microcontroller to be always ON during dimming operation.

256-step (8bit) PWM dimming is possible for smooth adjustment. In addition, each channel can be independently set to achieve a variety of lighting effects.

Select between I²C or 2-line serial bus interface based on set requirements

4 different reset methods ensure proper use based on conditions

The thermal shutdown circuit is activated once the chip temperature exceeds a threshold value, stopping operation while performing a reset. This prevents damage to the device and peripheral components, resulting in a greater level of reliability.

ROHM ICs integrate a backside heat sink into a compact form factor for improved heat dissipation. The result is a permissible loss of only 1.45W (single-layer board). In addition, no external heat sink is required, contributing to greater miniaturization.