Advanced 12 Channel
Constant Current LED Driver IC
The BD18378EFV-M is a serial input controlled constant
current LED driver with 8 V output rating. 6 bit current
calibration is available for each output while a selected
PWM input performs dimming on the corresponding
output. The BD18378EFV-M is able to perform diagnostic
(open / short / temperature) checks to detect LED failure
and over temperature on chip. Fault detection is
performed also during LED deactivated state. The
settings of all internal registers can be read out to verify
written information at any time.
AEC-Q100 Qualified (Note1)
Current capability: 50mA per output channel.
4-line SPI Control.
External resistor current setting.
Limp Home capability.
PWM dimming 0.2-99.2% at 200Hz
Diagnostic of all PWM inputs.
Programmable output mapping to each PWM input.
6 Bit LED brightness adjustment on each channel.
Diagnostic output on LED OPEN and SHORT for
each channel during PWM on & off time.
True LED voltage measurement.
Over Temperature Protection and Thermal
Open Drain Fault indicator.
Read-back of all register settings.
Outputs can be connected in parallel to achieve
more than 50mA into the load.
Slew Rate limited switching reduces
radiated Noise (EMI).
Daisy chain compatible.
(Note1: Operating Temperature Grade 2)
Typical Application Circuit Diagram
Input voltage range:
Output voltage range:
Output Current range:
Output Current accuracy
Maximum clock frequency:
Operating temperature range:
3V to 5.5V
0.5V to 8V
10mA to 50mA
- 40°C to +105°C
L(Typ.) x W(Typ.) x H(Max.)
9.70mm x 6.40mm x 1.00mm
Automotive illumination & ambient light
Consumer electronics illumination
0 1 2 3 4 5 6 7 8 9 10 11 SENSE
SDI CLK SDO LATCH
Figure 1. Typical application diagram
○Product structure：Silicon monolithic integrated circuit
©m 2015 ROHM Co., Ltd. All rights reserved.
○This product is not designed protection against radioactive rays
04. Dec. 2015 Rev.004