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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.
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