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SGM37891

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單路,無電感具有手電筒模式的 LED 閃光驅動器

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SGM37891是一款單路LED閃光燈驅動器,其內部包括一個最大輸出可達720mA(SGM37891A支持到1240mA)的受控恒流源和必要的保護及控制電路。SGM37891基于NMOSFET電流控制結構,配合新型的低正向壓降LED,在鋰充電電池的平臺電壓范圍內可不必配套升壓電路維持恒流,這在減少系統成本的同時避免了開關電磁干擾。其內部恒流源結構允許LED負極接地,有利于散熱

SGM37891根據輸入脈沖個數設置輸出電流。閃光燈模式通過閃光燈超時保護計時器(650ms,典型值)限制最大連續輸出時間,進而防止LED燈珠過熱。此過程中若ON引腳出現低脈沖(50μs,典型值)則重置芯片內部計時器。電源電壓低于3.45V或芯片溫度高于165時,SGM37891自動按比例降低驅動電流直到電源電壓穩定或片芯溫度回落。手電筒模式輸出時可緩慢開啟和緩慢關閉。

SGM37891采用UTDFN-1.5×2-6L和TSOT-23-6綠色封裝,額定工作溫度范圍為-40至+85

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FEATURES
  • 輸入電源電壓范圍:2.7V至5.5V

  • 最大閃光燈驅動電流

    720mA(SGM37891)

    1240mA(SGM37891A)

  • 閃光超時保護時間:650ms(典型值)

  • 閃光燈超時保護計時器可靈活復位,更好支持連拍應用

  • 6級調光(SGM37891),8級調光(SGM37891A)

  • 閃光燈模式與手電筒模式驅動電流之比約為4:1

  • 手電筒模式下緩慢開啟和緩慢關閉

  • 碰撞躲避監測

  • 在低電源電壓和過溫條件下依次按比例降低閃光燈驅動電流(100%、66%、33%、0%)

  • 綠色UTDFN-1.5×2-6L和TSOT-23-6封裝

APPLICATIONS

智能電話

平板電腦

網絡相機

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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