TPS61325 Series
1.5A/4.1A multiple LED Camera flash driver with I2C compatible interface
Manufacturer: Texas Instruments
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Key Features
• Four Operational ModesDC-Light and FlashlightVoltage Regulated Converter: 3.8 V to 5.7 VStandby: 2 μA (Typical)Storage Capacitor Friendly SolutionAutomatic VFand ESR CalibrationPower-Save Mode for Improved Efficiency at Low Output Power, Up to 95% EfficiencyOutput Voltage Remains Regulated When Input Voltage Exceeds Nominal Output VoltageI2C Compatible Interface up to 3.4 MbpsDual Wire Camera Module InterfaceZero Latency Tx-Masking InputLED Temperature MonitoringPrivacy Indicator LED OutputIntegrated LED Safety TimerGPIO/Flash Ready OutputTotal Solution Size of Less Than 25 mm2(< 1-mm height)Available in a 20-Pin NanoFree (DSBGA)All trademarks are the property of their respective owners.Four Operational ModesDC-Light and FlashlightVoltage Regulated Converter: 3.8 V to 5.7 VStandby: 2 μA (Typical)Storage Capacitor Friendly SolutionAutomatic VFand ESR CalibrationPower-Save Mode for Improved Efficiency at Low Output Power, Up to 95% EfficiencyOutput Voltage Remains Regulated When Input Voltage Exceeds Nominal Output VoltageI2C Compatible Interface up to 3.4 MbpsDual Wire Camera Module InterfaceZero Latency Tx-Masking InputLED Temperature MonitoringPrivacy Indicator LED OutputIntegrated LED Safety TimerGPIO/Flash Ready OutputTotal Solution Size of Less Than 25 mm2(< 1-mm height)Available in a 20-Pin NanoFree (DSBGA)All trademarks are the property of their respective owners.
Description
AI
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.
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.