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SGM37895

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独立双路,无电感具有手电筒模式的 LED 闪光驱动器

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SGM37895是一款双路LED闪光灯驱动器,其内部集成了两个由I2C设置的电流源(可设置的闪光灯驱动电流为750mA/1000mA,默认值750mA)。

因为采用线性闪光驱动结构而无需电感,同时其输出允许LED负极接地,所以可实现紧凑的PCB布局并具有极低的EMI和良好的散热特性。

闪光期间SGM37895可通过I2C指令降低任一通道驱动电流,共有四个级别:100%/80%/64%/51%。
为防LED闪光灯过热,当闪光灯驱动电流连续输出超过575ms后,闪光灯超时保护计时器会强制关闭输出。而闪光期间若温度超过168或电源电压低于设定的阈值电压(通过I2C设置,默认值3.4V),芯片会自动按比例(100%/66%/33%/0%)降低闪光灯驱动电流。

在手电筒模式下,其电流为闪光灯驱动电流的10%。当设置为100%额定电流时,具有缓慢开启功能,而设置为80%/64%/51%时则正常启动。

SGM37895的16进制I2C地址为0xA7(读)/0xA6(写)。SGM37895采用TDFN-3×3-10L以及UTQFN-2.6×1.8-10AL绿色封装,工作温度范围为-40至+85。为增强散热性能建议尽可能增加VIN, LED1与LED2引脚覆铜的面积。

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FEATURES
  • 输入电源电压范围:2.7V至5.5V

  • 闪光灯模式与手电筒模式驱动电流之比为10:1

  • 精确的闪光灯额定电流:750mA/1000mA

  • 用I2C降低额定电流(100%/80%/64%/51%)

  • 精确的闪光超时保护时间:575ms(典型值)

  • 通过I2C设置低电池电压检测的阈值(3.0V ~ 3.7V)

  • 在电源电压过低或过热的条件下自动降低闪光灯驱动电流(100%/66%/33%/0%)

  • 碰撞躲避监测

  • 闪光期间状态监视

  • I2C接口

  • 绿色TDFN-3×3-10L与UTQFN-2.6×1.8-10AL封装

APPLICATIONS

所有支持照相功能的便携设备,如手机、数码相机、摄像机和平板电脑等

Ordering Information
Part Number
StatusPackagePinsPd-Free
RoHS
REACH
Green
MSL RatingOperating Temperature RangeMaterial ContentReliability Report
Unit Resale Price*
(Volume Range: in USD)
Lead Time**
(Volume Range: Days)
SGM37895YTD10G/TR
Active
TDFN-3×3-10L
10
Yes
YesYesYesMSL1
-40℃ to +85℃
View
View
1-24 units : $0.7/unit
25-99 units : $0.6/unit
100-249 units : $0.5/unit
250-499 units : $0.4/unit
500-999 units : $0.35/unit
1000-9999 units : $0.26/unit
3K-9K : 14 days
10K-99K : 28 days
100K-999K : 70 days
1000K and above : 91 days
SGM37895YUQP10G/TR
Active
UTQFN-2.6×1.8-10AL
10
Yes
YesYesYes
-40℃ to +85℃
View
View

* The unit resale price is for reference purposes only. Please contact our distributors for a formal quotation.

** The lead time provided is for reference purposes only and is subject to change based on different circumstances.

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SG Micro Corp (SGMICRO) specializes in the development, manufacturing and sales of high-performance and high-reliability integrated circuits for analog signal conditioning and system power management, offering innovative solutions to a broad range of applications in the industrial, automotive, communication, computing, consumer electronics, and medical equipment markets.
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