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SGM37891

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单路,无电感具有手电筒模式的 LED 闪光驱动器

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SGM37891是一款单路LED闪光灯驱动器,其内部包括一个最大输出可达720mA(SGM37891A支持到1240mA)的受控恒流源和必要的保护及控制电路。SGM37891基于NMOSFET电流控制结构,配合新型的低正向压降LED,在锂充电电池的平台电压范围内可不必配套升压电路维持恒流,这在减少系统成本的同时避免了开关电磁干扰。其内部恒流源结构允许LED负极接地,有利于散热

SGM37891根据输入脉冲个数设置输出电流。闪光灯模式通过闪光灯超时保护计时器(650ms,典型值)限制最大连续输出时间,进而防止LED灯珠过热。此过程中若ON引脚出现低脉冲(50μs,典型值)则重置芯片内部计时器。电源电压低于3.45V或芯片温度高于165时,SGM37891自动按比例降低驱动电流直到电源电压稳定或片芯温度回落。手电筒模式输出时可缓慢开启和缓慢关闭。

SGM37891采用UTDFN-1.5×2-6L和TSOT-23-6绿色封装,额定工作温度范围为-40至+85

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FEATURES
  • 输入电源电压范围:2.7V至5.5V

  • 最大闪光灯驱动电流

    720mA(SGM37891)

    1240mA(SGM37891A)

  • 闪光超时保护时间:650ms(典型值)

  • 闪光灯超时保护计时器可灵活复位,更好支持连拍应用

  • 6级调光(SGM37891),8级调光(SGM37891A)

  • 闪光灯模式与手电筒模式驱动电流之比约为4:1

  • 手电筒模式下缓慢开启和缓慢关闭

  • 碰撞躲避监测

  • 在低电源电压和过温条件下依次按比例降低闪光灯驱动电流(100%、66%、33%、0%)

  • 绿色UTDFN-1.5×2-6L和TSOT-23-6封装

APPLICATIONS

智能电话

平板电脑

网络相机

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)
SGM37891AYTN6G/TR
Active
TSOT-23-6
6
Yes
YesYesYesMSL3
-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 : 35 days
100K-999K : 70 days
1000K and above : 91 days
SGM37891AYUDT6G/TR
Active
UTDFN-1.5×2-6L
6
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 : 35 days
100K-999K : 70 days
1000K and above : 98 days
SGM37891YTN6G/TR
Active
TSOT-23-6
6
Yes
YesYesYesMSL3
-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 : 35 days
100K-999K : 70 days
1000K and above : 91 days
SGM37891YUDT6G/TR
Active
UTDFN-1.5×2-6L
6
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 : 35 days
100K-999K : 70 days
1000K and above : 98 days

* 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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