TPS61325 - 具有 12C 兼容接口的 1.5A/4.1A 多个 LED 摄像机闪存驱动器

TPS61325是TI德州仪器公司的一款相机闪光灯LED驱动器产品，TPS61325是具有 12C 兼容接口的 1.5A/4.1A 多个 LED 摄像机闪存驱动器，本站介绍了TPS61325的封装应用图解、特点和优点、功能等，并给出了与TPS61325相关的TI元器件型号供参考。

TPS61325 - 具有 12C 兼容接口的 1.5A/4.1A 多个 LED 摄像机闪存驱动器 - 相机闪光灯LED驱动器 - LED驱动器 - 德州仪器

产品描述

The TPS6132x device is based on a high-frequency synchronous boost topology with constant current sinks to drive up to three white LEDs in parallel (445mA/890mA/445mA maximum flash current). The extended high-current mode (HC_SEL) allows up to 1025mA/2050mA/1025mA flash current out of the storage capacitor.

The high-capacity storage capacitor on the output of the boost regulator provides the high-peak flash LED current, thereby reducing the peak current demand from the battery to a minimum.

The 2-MHz switching frequency allows the use of small and low profile 2.2µH inductors. To optimize overall efficiency, the device operates with a 400mV LED feedback voltage.

The TPS6132x device not only operates as a regulated current source, but also as a standard voltage boost regulator. The device keeps the output voltage regulated even when the input voltage exceeds the nominal output voltage. The device enters power-save mode operation at light load currents to maintain high efficiency over the entire load current range.

To simplify DC light and flashlight synchronization with the camera module, the device offers a dedicated control interface (STRB0, STRB1) for zero latency LED turn-on time.

产品特性

Four Operational Modes
- DC Light and Flashlight
- Voltage Regulated Converter: 3.8V...5.7V
- Standby: 2µA (typ.)
Storage Capacitor Friendly Solution
Automatic VF and ESR Calibration
Power-Save Mode for Improved Efficiency at Low Output Power, Up to 95% Efficiency
Output Voltage Remains Regulated When Input Voltage Exceeds Nominal Output Voltage
I2C Compatible Interface up to 3.4Mbits/s
Dual Wire Camera Module Interface
Zero Latency Tx-Masking Input
LED Temperature Monitoring
Privacy Indicator LED Output
Integrated LED Safety Timer
GPIO/Flash Ready Output
Total Solution Size of Less Than 25 mm2 (<1mm height)
Available in a 20-Pin NanoFree (CSP)
APPLICATIONS
- Single/Dual/Triple White LED Flashlight Supply for Cell Phones and Smart-Phones
- LED Based Xenon "Killer" Flashlight

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