ADP1655 View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADP1655

Dual LED Flash Driver with I2C-Compatible Interface

Analog Devices 

STATE TRANSITIONS

When the ADP1655 is in flash mode, the TX_MASK pin can

be used to reduce the battery load. The device remains in flash

mode, but the LED driver output current is reduced to the assist

ADP1655

light level. In Figure 34, if the flash was triggered by the strobe

pin in level-sensitive mode, a timeout triggers a timeout fault,

as defined in the Safety Features section.

TX_MASK ENABLED

TX_MASK = 1

MODE = ASSIST LIGHT

OUTPUT ON

STROBE DISABLED

MODE = FLASH

OUTPUT ON

STROBE = 1

STROBE = 1

TX_MASK = 0

STROBE DISABLED

MODE = FLASH

TX_MASK = 0

FLASH

OUTPUT ON

STROBE = 1

EXTERNAL

TORCH

EN1 = 0

EN2 = 1

ASSIST

LIGHT

OUTPUT ON

MODE = ASSIST LIGHT

OUTPUT OFF

OUTPUT ON

STROBE DISABLED

MODE = FLASH

TIMEOUT

OUTPUT OFF

STANDBY

I2C/EN = 1

TORCH NOT

ALLOWED

TORCH = 0

TORCH ALLOWED

MODE = TORCH

Figure 34. I2C Interface Mode: State Transitions

Rev. 0 | Page 15 of 24

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