TPS61050 - 具有 I2C 兼容接口的 1.2A 高功率白光 LED 驱动器

TPS61050是TI德州仪器公司的一款相机闪光灯LED驱动器产品，TPS61050是具有 I2C 兼容接口的 1.2A 高功率白光 LED 驱动器，本站介绍了TPS61050的封装应用图解、特点和优点、功能等，并给出了与TPS61050相关的TI元器件型号供参考。

TPS61050 - 具有 I2C 兼容接口的 1.2A 高功率白光 LED 驱动器 - 相机闪光灯LED驱动器 - LED驱动器 - 德州仪器

产品特性

Four Operational Modes
- Torch and Flash up to ILED = 1200 mA
- Voltage-Regulated Boost Converter: 4.5 V, 5 V, and 5.25 V
- Shutdown: 0.3 μA (Typical)
Total Solution Circuit Area < 25 mm2
Up to 96% Efficiency
I2C-Compatible Interface up to 400 kbps
Integrated LED Turnon Safety Timer
Zero Latency TX-Masking Input (TPS61050)
Hardware Voltage Mode Selection Input (TPS61052)
Integrated ADC for LED VF Monitoring
Integrated Low Light Dimming Mode
LED Disconnect During Shutdown
Open and Shorted LED Protection
Overtemperature Protection
Available in a 12-Pin NanoFree™ (CSP) and 10-Pin QFN Packaging

产品应用

Camera White LED Torch/Flash for Cell Phones, Smart-Phones and PDAs
Audio Amplifier Power Supply

Typical Application Schematic

产品说明

The TPS6105x device is based on a high-frequency synchronous-boost topology with constant current sink to drive single white LEDs. The device uses an inductive fixed-frequency PWM control scheme using small external components, minimizing input ripple current.

The 2-MHz switching frequency allows the use of small and low profile 2.2-μH inductors. To optimize overall efficiency, the device operates with only a 250-mV LED feedback voltage.

The TPS6105x device not only operates as a regulated current source, but also as a standard voltage-boost regulator. This additional operating mode can be useful to supply other high-power devices in the system, such as a hands-free audio power amplifier, or any other component requiring a supply voltage higher than the battery voltage (refer to TPS61052).

For highest flexibility, the LED current or the desired output voltage can be programmed through an I2C compatible interface. To simplify flash synchronization with the camera module, the device offers a trigger pin (FLASH_SYNC) for fast LED turnon time.

When the TPS6105x is not in use, it can be put into shutdown mode through the I2C-compatible interface, reducing the input current to 0.3 μA (typical). During shutdown, the LED pin is high impedance to avoid leakage current through the LED.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS61050 TPS61052	VSON (10)	3.00 mm × 3.00 mm
TPS61050 TPS61052	DSBGA (12)	1.96 mm × 1.46 mm

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