ADP1655 Analog Devices, ADP1655 Datasheet - Page 15

• Manufacturer Part Number: ADP1655
• Description: Dual LED Flash Driver with I2C Compatible Interface
• Manufacturer: Analog Devices

Specifications of ADP1655

• Product Description: Serial 2 WLED Flash Driver
• Led #: 2
• Led Configuration: Serial
• Topology: Inductive
• Application: Flash
• I2c Support: Yes
• Max Iout (ma): 400mA
• Brightness Control: I2C
• Peak Efficiency (%): n/a
• Switching Frequency: 2MHz
• Over Volt Protection (v): 10V
• Vin Min (v): 2.5V
• Vout (v): Current Output
• Synchronous: Yes
• Package: 12-Bump WLCSP

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
OUTPUT ON
STROBE = 1
EXTERNAL
TORCH
STROBE DISABLED
MODE = FLASH
OUTPUT ON
EN1 = 0
EN2 = 1
MODE = ASSIST LIGHT
OUTPUT ON
TORCH NOT
ALLOWED
Figure 34. I
ASSIST
LIGHT
OUTPUT OFF
TORCH = 0
2
C Interface Mode: State Transitions
Rev. 0 | Page 15 of 24
MODE = ASSIST LIGHT
TX_MASK ENABLED
TX_MASK = 1
TX_MASK = 0
STROBE = 1
STROBE DISABLED
TORCH ALLOWED
MODE = TORCH
MODE = FLASH
TX_MASK = 0
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.
STROBE DISABLED
MODE = FLASH
OUTPUT ON
FLASH
OUTPUT ON
STROBE = 1
STANDBY
I2C/EN = 1
TIMEOUT
OUTPUT OFF
ADP1655