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
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
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