TPS61043 - TPS61043：恒流 LED 驱动器

TPS61043是TI德州仪器公司的一款背光产品，TPS61043是TPS61043：恒流 LED 驱动器，本站介绍了TPS61043的封装应用图解、特点和优点、功能等，并给出了与TPS61043相关的TI元器件型号供参考。

TPS61043 - TPS61043：恒流 LED 驱动器 - 背光 - LED驱动器 - 德州仪器

产品特性

Current Source With 18-V Overvoltage Protection
Powers up to 4 LEDs in Series
Input Voltage Range: 1.8 V to 6 V
Internal 30-V Switch
Up to 85% Efficiency
Precise Brightness Control Using PWM Signal or Analog Signal
Switching Frequency up to 1 MHz
Internal Power MOSFET Switch 400 mA
Operates With Small Output Capacitors Down to 100 nF
Disconnects LEDs During Shutdown
No Load Quiescent Current 38 µA Typical
Shutdown Current 0.1 µA Typical
Available in a Small 3-mm × 3-mm QFN Package

产品应用

White LED Supply for Display Backlight and Sidelight in
- PDAs, Pocket PCs, Smart Phones
- Handheld Devices
- Cellular Phones

产品说明

The TPS61043 is a high-frequency boost converter with constant current output that drives white LEDs or similar. The LED current is set with the external sense resistor (RS) and is directly regulated by the feedback pin (FB) that regulates the voltage across the sense resistor RS to 252 mV (typical). To control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a frequency range of 100 Hz to 50 kHz to the control pin (CTRL). To allow higher flexibility, the device can be configured so that the brightness is controlled by an analog signal as well, as described in Application Information. To avoid possible leakage currents through the LEDs during shutdown, the control pin (CTRL) disables the device and disconnects the LEDs from ground. For maximum safety during operation, the output has integrated overvoltage protection that prevents damage to the device by limiting the output voltage to typically 18 V in case of a high-impedance output (for example, faulty LED). The TPS61043 device provides a solution for applications where higher LED currents or more than four LEDs in series must be powered.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS61043	VSON (8)	3.00 mm × 3.00 mm

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