1.5A/4.1A multiple LED Camera flash driver with I2CTM compatible interface

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 (HCSEL) 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 (FLASHSYNC) for zero latency LED turnon time.