TPS61305数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The TPS6130xx device is based on a high-frequency synchronous boost topology with constant current sinks to drive up to three white LEDs in parallel (400-mA, 800-mA, and 400-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 TPS6130xx 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 flashlight synchronization with the camera module, the device offers a trigger pin (FLASH_SYNC) for zero latency LED turnon time.

特性 Features

• Four Operational Modes
• DC Light and Flashlight
• Voltage Regulated Converter: 3.8 V to 5.7 V
• Standby: 2 µA (Typical)

• 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 3.4 Mbits/s
• Zero Latency Tx-Masking Input
• Hardware Voltage Mode Selection Input (TPS61300, TPS61301)
• DC Light Mode Selection Input (TPS61300, TPS61306)
• Hardware Reset Input (TPS61301, TPS61305)
• LED Temperature Monitoring (TPS61305)
• Privacy Indicator LED Output
• Integrated LED Safety Timer
• Total Solution Size of Less Than 25 mm2 (height)
• Available in a 20-Pin NanoFree™ (DSBGA)