SGM3146

停产

8-Channel Charge Pump White LED Driver with Low Dropout Current Source

SGM3146.pdf

SGM3146 的状态是不推荐用于新设计或已停产。您可选用下面的类似产品：

SGM3122

量产

PWM Dimming, Charge Pump White LED Driver with Low Dropout Current Source

SGM3124

量产

PWM Dimming, Charge Pump White LED Driver with Low Dropout Current Source

The SGM3146 is a current-regulated white LED driver with integrated low dropout current sources and a high efficiency charge pump. The charge pump has automatically selectable 1×/1.5× fractional operation modes. The SGM3146 is well suited for white LED applications powered by a Li-Ion battery due to small equivalent open-loop resistance in 1× mode.

The supply voltage operates from 2.7V to 5.5V. The SGM3146 supports up to 8 LEDs for 27mA maximum current per string. The LED reference current is set through an internal resistor. The SGM3146 contains a 4-bit digital-to-analog converter for 16-step LED current control. The LED current can be set between 1.65mA and 27mA by a serial pulse input signal into the EN/SET pin. Built-in soft-start circuitry avoids excessive inrush current during startup and mode transition.

The SGM3146 is available in a Green TQFN-3×3-20L package. It operates over an ambient temperature range of -40℃ to +85℃.

特性

Input Voltage Range: 2.7V to 5.5V
Support up to 8 LEDs at 27mA Each
16-Step LED Brightness Control through One-Wire Interface
1× and 1.5× Charge Pump for High Conversion Efficiency
Switching Frequency: 0.93MHz
±4.8% Regulated LED Current Matching
Built-in Soft-Start for Reducing Inrush Current
Low Input Ripple and Low EMI
Protection Features
Over-Current Protection
Under-Voltage Lockout
Thermal Shutdown
Operating Temperature Range: -40℃ to +85℃
Available a in Green TQFN-3×3-20L Package

应用

White LED Backlighting

Mobile Phones, MP3s

Digital Still Cameras

LCD Displays

订购信息

Part Number	Status	Package	Pins	Pd-Free	RoHS	REACH	Green	MSL Rating	Operating Temperature Range	Material Content	Reliability Report	Unit Resale Price* (Volume Range: in USD)	Lead Time** (Volume Range: Days)
SGM3146YTQG20G/TR	停产	TQFN-3×3-20L	20	Yes	Yes	Yes	Yes		-40℃ to +85℃	查看	查看

* 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。