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SGM3759

量产

38V High Efficiency, Boost White LED Driver with Strobe Interface for Flash Mode

Preview Image
Preview Image

The SGM3759 is a high efficiency white LED driver with a 1.2MHz boost converter. With the fixed switching frequency and an internal 40V/3A switch FET, the SGM3759 is designed for powering single or parallel LED strings for various size panel backlighting and ideal for smart phone image capture using display device as a flash mode light source, as it is capable of driving up to 200mA current at 30V for 320ms when the strobe signal is active.

The FB feedback voltage is regulated at 200mV typically. The backlight mode default LED current is programmed by an external RSET resistor. During the operation, the LED current can be controlled by applying a PWM signal to the CTRL pin. The feedback voltage depends on the PWM signal duty cycle. For PWM dimming control, there are no audible noises on the output capacitor.

The SGM3759 integrates LED open protection. It prevents the device from damaging due to the over-voltage during LED open conditions.

When the device is in operation and the STROBE pin is pulled up, the SGM3759 will enter flash mode within 100μs. The feedback voltage is regulated to 5× of thebacklight mode voltage that is determined by the PWM signal duty cycle. When the STROBE pin is pulled down or the strobe signal remains high for longer than the 320ms timer, the SGM3759 will enter backlight mode within 100μs.

The SGM3759 is available in a Green TSOT-23-6 package. It operates over an ambient temperature range of -40 to +85.

More
特性
  • Input Voltage Range: 2.7V to 5.5V

  • Integrated 40V/3A Switch

  • Up to 200mA Output Current at 30V

  • Accumulated 320ms Flash Timer Control

  • Switching Frequency: 1.2MHz

  • PWM Dimming Control

  • PWM Dimming Frequency: 20kHz to 100kHz

  • Strobe Interface for Image Capture Mode

  • Up to 87% Efficiency for 7S2P LEDs

  • Up to 92% Efficiency for 3S20P LEDs

  • Dimming Stable in 1:500 Range

  • Feedback Voltage

    Backlight Mode: 200mV

    Flash Mode: 1000mV

  • Flash Mode Under-Voltage Lockout

  • Automatic Soft-Start for Reducing Inrush Current

  • PFM Mode at Light Load

  • Protection Features

    38V Over-Voltage Protection

    LED Open or Short Protection

    Thermal Shutdown

  • -40 to +85 Operating Temperature Range

  • Available in a Green TSOT-23-6 Package

应用

PDAs, Handheld Computers

Backlight for Media Form Factor LCD Displays with 1-Cell Battery Input

订购信息
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)
SGM3759YTN6G/TR
量产
TSOT-23-6
6
Yes
YesYesYesMSL3
-40℃ to +85℃
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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

* 价格仅供参考。请联系我们的经销商获取正式报价。

** 交货时间仅供参考,可能会根据不同情况而发生变化。

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圣邦微电子 (SGMICRO) 是一家综合性的高性能和高可靠性模拟及混合信号处理和系统电源管理集成电路供应商,为工业自动化、新能源、汽车、通信、计算机、消费电子和医疗设备等应用提供各类模拟信号调理和电源创新解决方案。
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