TPS61325中文资料具有 I2C 兼容接口、支持驱动多个 LED 摄像机闪光灯的 1.5A/4.1A 驱动器数据手册TI规格书

描述 Description

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 (445-mA, 890-mA, 445-mA maximum flash current). The extended high-current mode (HC_SEL) allows up to 1025-mA, 2050-mA, and 1025-mA 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 2.2-μH inductors. To optimize overall efficiency, the device operates with a 400-mV 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 and STRB1 pins) for zero latency LED turnon time.

特性 Features

• Four Operational Modes
• Voltage Regulated Converter: 3.8 V to 5.7 V
• Storage Capacitor Friendly Solution
• Power-Save Mode for Improved Efficiency at Low Output Power, Up to 95% Efficiency
• I2C Compatible Interface up to 3.4 Mbps
• Zero Latency Tx-Masking Input
• Privacy Indicator LED Output
• GPIO/Flash Ready Output
• Total Solution Size of Less Than 25 mm2 (