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TPS61050 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS61050 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 45 page CSP-12 QFN-10 www.ti.com FEATURES DESCRIPTION APPLICATIONS VOUT AVIN SW C IN SW LED PGND PGND P P P AGND GPIO SDA SCL I2CI/F FLASH_SYNC L P TPS61050 2.2 H m C 10 F OUT m +BATTERY LED ANODE PGND INDUCTOR C1 L1 C2 LED SENSE 4.7mm PGND TPS61050 TPS61052 SLUS525 – MARCH 2007 1.2-A HIGH POWER WHITE LED DRIVER 2-MHz SYNCHRONOUS BOOST CONVERTER WITH I2C COMPATIBLE INTERFACE • Four Operational Modes The TPS6105x device is based on a high-frequency synchronous-boost topology with constant current – Torch and Flash up to ILED = 1200 mA sink to drive single white LEDs. The device uses an – Voltage-Regulated Boost Converter: inductive fixed-frequency PWM control scheme using 4.5/5.0/5.25 V small external components, minimizing input ripple – Shutdown: 0.3 µA (typ) current. • Total Solution Circuit Area < 25 mm2 The 2-MHz switching frequency allows the use of • Up to 96% Efficiency small and low profile 2.2- µH inductors. To optimize overall efficiency, the device operates with only a • I2C-Compatible Interface up to 400 kbps 250 mV LED feedback voltage. • Integrated LED Turn-On Safety Timer The TPS6105x device not only operates as a • Zero Latency TX-Masking Input (TPS61050) regulated current source, but also as a standard • Hardware Voltage Mode Selection Input voltage-boost regulator. This additional operating (TPS61052) mode can be useful to supply other high-power • Integrated ADC for LED V F Monitoring devices in the system, such as a hands-free audio power amplifier, or any other component requiring a • Integrated Low Light Dimming Mode supply voltage higher than the battery voltage (refer • LED Disconnect During Shutdown to TPS61052). • Open/Shorted LED Protection For highest flexibility, the LED current or the desired • Over-Temperature Protection output voltage can be programmed via an I2C • Available in a 12-Pin NanoFree™ (CSP) and compatible interface. To simplify flash synchronization with the camera module, the device 10-Pin QFN Packaging offers a trigger pin (FLASH_SYNC) for fast LED turn-on time. • Camera White LED Torch/Flash for Cell When the TPS6105x is not in use, it can be put into Phones, Smart-Phones and PDAs shutdown mode via the I2C-compatible interface, reducing the input current to 0.3 µA (typ). During • Audio Amplifier Power Supply shutdown, the LED pin is high impedance to avoid leakage current through the LED. Figure 1. Typical Application Figure 2. Typical PC-Board Layout Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. NanoFree, PowerPAD are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2007, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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