Datasheet > BD18378EFV-M

BD18378EFV-M

更新时间： 2024-11-05 01:16:19

品牌	Logo	应用领域
罗姆 - ROHM		/
页数	文件大小	规格书
30页	1246K
描述
Advanced 12 Channel Constant Current LED Driver IC

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中文翻译

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数据手册

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BD18378EFV-M 数据手册

Advanced 12 Channel

Constant Current LED Driver IC

BD18378EFV-M

General Description

Key Specifications

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.

 Input voltage range:

3V to 5.5V

0.5V to 8V

10mA to 50mA

3.5%

1.25MHz

4mA (Typ.)

- 40°C to +105°C

 Output voltage range:

 Output Current range:

 Output Current accuracy

 Maximum clock frequency:

 Operating current:

 Operating temperature range:

Package

HTSSOP-B28

L(Typ.) x W(Typ.) x H(Max.)

9.70mm x 6.40mm x 1.00mm

Features

 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

Feedback.

Applications

 Automotive illumination & ambient light

 Consumer electronics illumination

 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

8V max

LEDs

R_P

V_LED

C_LED

11 SENSE

V_CCERR

CHANNEL

5.5V max

V_CC

C_IN

BD18378EFV-M

Heat Sink

Noisy

ground line

Quiet

ground line

PWM

SDI CLK SDO LATCH

PGND

IREF

AGND

R_EXT

to Controller

Figure 1. Typical application diagram

○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays

.www.rohm.co

TSZ22111・14・001

TSZ02201-0W1W0C500020-1-2

04. Dec. 2015 Rev.004

1/26

12 3 4 5 6 7...30

中文翻译

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