LED Drivers Stable With Car-Battery Input

ROHM Electronics' LED drivers offer the capability to withstand high input voltages up to 36V for automotive applications.

The BD8109FMand BD8118FMhave integrated current-mode DC/DC controllers to ensure stable operation against unstable car-battery input voltages, and also to remove constraints on the number of LEDs allowed in series connection.

The devices support Pulse Width Modulation (PWM) LED luminance control and can also be controlled in applications where an external signal is used for output control using the VDAC interface.

The on-board LED drivers are protected against open-circuit conditions if any of the driver outputs are left open. The devices also have multiple builtin protection functions, such as under-voltage lockout, over-voltage protection, and over-current protection.

 

FEATURES Input range: 4.5V to 30V (BD8118FM) 5.0V to 30V (BD8109FM) Integrated DC/DC controller: Step-up (BD8118FM) Buck-boost current-mode (BD8109FM) Abnormal-status detection function HSOP-M28 package Four integrated LED current driver channels (maximum 150mA per channel)

APPLICATIONS Car-navigation backlights Small- and medium-sized LCD panels Dashboard panels

 

 

 

• Exar’s SP6699, page 081110
• Vishay’s TEMD6010FX01 & TEMD5510FX01, page 081130
• Melexis’ SensorEyeC, page 081131

 

Rohm / BD8109FM / BD8118FM