TPS61166 - 具有集成功率二极管和快速猝发明暗调节模式的白光 LED 驱动器

TPS61166是TI德州仪器公司的一款背光产品，TPS61166是具有集成功率二极管和快速猝发明暗调节模式的白光 LED 驱动器，本站介绍了TPS61166的封装应用图解、特点和优点、功能等，并给出了与TPS61166相关的TI元器件型号供参考。

TPS61166 - 具有集成功率二极管和快速猝发明暗调节模式的白光 LED 驱动器 - 背光 - LED驱动器 - 德州仪器

产品描述

The TPS61166 is a boost converter with a 20-V rated integrated switch FET and power diode that drives up to 5 LEDs in series. This device integrates a high side switch FET that can turn on/off the LED current within 1-µs of the applied external PWM signal. The high side switch also provides input-to-output isolation during IC shutdown.

The default white LED current is set with the external sensor resistor R1, and the feedback voltage is regulated to 200-mV, as shown in the typical application circuit. The LED current can be adjusted using a pulse width modulation (PWM) signal through the PWM pin. The LED current is synchronized to the PWM signal. The device does not discharge the output ceramic capacitor during dimming, thus reducing audible noise when dimming.

Separating the IC input (VIN pin) and power stage input (VBAT pin) makes the device flexible enough to support single- or two-cell Li-ion battery applications. Other protection features include 1.1-A peak-to-peak over current protection (OCP), over voltage protection (OVP), over load protection (OLP), and thermal shutdown. The TPS61166 is available in a 2.5 mm × 2.5 mm SON package with thermal pad.

产品特性

IC Supply Range: 2.5-V to 6-V
Power Stage Input Range: 4.5-V to 10-V
Integrated 1.1-A / 20-V Internal Switch FET and Power Diode
Drive up to 5 LEDs in Series
Fast on/off LED Current Within 1-µs in Brightness Dimming
Burst PWM Dimming Method With Frequency Range From 60-Hz to 40-kHz
Built-in Soft Start-up
Over Load Protection
Over Voltage Protection
2.5 × 2.5 × 0.8 mm SON Package
APPLICATIONS
- Small Form Factor LCD Backlight
- Mobile Phone
- Digital Camera
- Personal Camcorder
- Single Lens Reflex

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