bd94130efv-m is embedded 24-channel constant current drivers with 12bit pwm dimming and max 8-line switch controllers. this device can set led constant current value by setting external iset resistor. communication with μ-controller via spi is feasible.

主要规格

 
型号 | bd94130efv-me2
status | 推荐品
封装 | htssop-b54
包装数量 | 1500
最小独立包装数量 | 1500
包装形态 | taping
rohs |

功能安全:

凯发k8一触即发
类别 : fs supportive
a product that has been developed for automotive use and is capable of supporting safety analysis with regard to the functional safety.

特性:

topology

constant current

series

parallel output led driver

led configuration

24 parallel

dimming

pwm / dac

pwm dimming steps

4096

analog dimming steps

64

number of outputs

24

per channel drive(max.)[ma]

80

ch to ch accuracy(typ.)[±%]

3

vout(max.)[v]

20

data input

spi

data transfer rate(max.)[mhz]

20

data vin(min.)[v]

1.6

data vin(max.)[v]

3.5

led open detection

yes

vin(min.)[v]

3

vin(max.)[v]

5.5

operating temperature (min.)[°c]

-40

operating temperature (max.)[°c]

125

package size [mm]

18.5x9.5 (t=1)

common standard

aec-q100 (automotive grade)

特点:

  • aec-q100 qualified (grade 1)
  • functional safety supportive automotive products
  • integrated 24-channel led constant current drivers
  • integrated 4/6/8-line switch controllers
  • spi interface (cascade connection feasible)
  • 12bit pwm dimming
  • led constant current setting by iset resistor
  • phase shift function
  • 6bit dot correct (50% to 100%)
  • led open detection and led short detection
  • adjacent ledch short detection
  • pgate short protection
  • vinsw over voltage protection
  • slew rate control for pmos gate driver
  • abnormality output failb pin

产品概要

 

背景

近年来,随着adas(高级驾驶辅助系统)的发展和车载信息娱乐功能的增加,车载显示器需要具备更高的清晰度以便提高视认性。针对这种需求,具有局部调光功能的led驱动器可以只关闭液晶显示器暗部的背光,有助于提高液晶显示的清晰度并降低功耗,因此开发新一代驾驶舱的各制造商正在考虑采用这种led驱动器。而以往的直接式led驱动器,一枚ic可以控制的分区数不足100个,在随着显示器尺寸增大而分区数日益增加的车载显示器领域,面临着led驱动器和外围元器件面积增加的挑战。

概要

“bd94130xxx-m”是由8路开关控制器和24通道电流驱动器组成的矩阵式led驱动器,仅由这一枚ic即可将背光用的mini led分割为多达192个分区进行控制(调光)。另外,每个分区的mini led还可通过局部调光功能独立控制,有助于提高显示器的清晰度并降低功耗。目前,在车载显示器领域,分区数量与日俱增,而且已成为市场发展趋势,“bd94130xxx-m”与直接式的普通产品相比,一枚ic能够控制的分区数量更多,因此可以大幅削减安装面积和所需控制器数量。例如,目前主流的采用了10英寸级车载显示器的车载信息娱乐系统,需要控制大约600个分区,本产品与直接式的普通产品(支持48个分区)相比,仅需1/4的led驱动器数量即可进行控制,led驱动器所占的安装面积可以缩减多达84%。另外,随着新一代驾驶舱所用显示器尺寸的增大,分区数也日益增加,因此采用“bd94130xxx-m”所带来的好处越发凸显。

应用示例

具有局部调光功能,可实现高对比度的车载显示器。
・电子后视镜(倒车镜、后视镜)
・车载信息娱乐系统
・仪表盘
・抬头显示系统(hud)

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