LED DRVR 1Segment 3.3V/5V 10-Pin VSON EP T/R

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 via an I2C compatible interface. To simplify flash synchronization with the camera module, the device offers a trigger pin (FLASH_SYNC) for fast LED turn-on time. When the TPS6105x is not in use, it can be put into shutdown mode via the I2C-compatible interface, reducing the input current to 0.3 µA (typ). During shutdown, the LED pin is high impedance to avoid leakage current through the LED.

Four Operational Modes

• Torch and Flash up to I_LED = 1200 mA
• Voltage-Regulated Boost Converter: 4.5/5.0/5.25 V
• Shutdown: 0.3 µA (typ)

Total Solution Circuit Area < 25 mm²

Up to 96% Efficiency

I²C-Compatible Interface up to 400 kbps

Integrated LED Turn-On Safety Timer

Zero Latency TX-Masking Input (TPS61050)

Hardware Voltage Mode Selection Input (TPS61052)

Integrated ADC for LED V_F Monitoring

Integrated Low Light Dimming Mode

LED Disconnect During Shutdown

Open/Shorted LED Protection

Over-Temperature Protection

Available in a 12-Pin NanoFree™ (CSP) and 10-Pin QFN Packaging

APPLICATIONS

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