1.2 -A高功率白光LED驱动器2 - MHz的同步升压转换器,带有I2C兼容接口 1.2-A HIGH POWER WHITE LED DRIVER 2-MHz SYNCHRONOUS BOOST CONVERTER WITH I2C COMPATIBLE INTERFACE
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 .
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.
5 V, and 5.25 V
TPS61052
10-Pin QFN Packaging
型号 | 品牌 | 下载 |
---|---|---|
TPS61052 | TI 德州仪器 | 下载 |
TPS62204DBV | TI 德州仪器 | 下载 |
TPS62202DBV | TI 德州仪器 | 下载 |
TPS62207DBV | TI 德州仪器 | 下载 |
TPS62205DBV | TI 德州仪器 | 下载 |
TPS62120DCN | TI 德州仪器 | 下载 |
TPS62162DSG | TI 德州仪器 | 下载 |
TPS62203DBV | TI 德州仪器 | 下载 |
TPS62200DBV | TI 德州仪器 | 下载 |
TPS62201DBV | TI 德州仪器 | 下载 |
TPS65051EVM-195 | TI 德州仪器 | 下载 |