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AS3647/47B
Datasheet, Confidential - P i n o u t
Pin Description
Table 1. Pin Description for AS3647
serial clock input for I C interface
serial data input/output for I C interface (needs external pullup resistor)
Function 2: Operate torch current level without using the I C interface to
Pin Number
A1
A2
A3
B1
B2
C1
C2
C3
D1
D2
E1
E2
E3
Pin Name
VOUT1
GND
LED_OUT1
SW1
GND
VOUT2
SW2
LED_OUT2
SCL
VIN
SDA
STROBE
TXMASK/
TORCH
Description
DCDC converter output capacitor - make a short connection to C VOUT / VOUT2
Power and analog ground; make a short connection between both balls
Flash LED current sink
DCDC converter switching node - make a short connection to SW2 / coil L DCDC
Power and analog ground; make a short connection between both balls
DCDC converter output capacitor - make a short connection to C VOUT / VOUT1
DCDC converter switching node - make a short connection to SW1 /coil L DCDC
Flash LED current sink
2
Positive supply voltage input - connect to supply and make a short connection
to input capacitor C VIN and to coil L DCDC
2
Digital input with pulldown to control strobe time for flash function
Function 1: Connect to RF power amplifier enable signal - reduces currents
during flash to avoid a system shutdown due to parallel operation of the RF PA
and the flash driver
2
operate the torch without need to start a camera processor (if the I C is
2
connected to the camera processor
Table 2. Pin Description for AS3647B
serial clock input for I C interface
serial data input/output for I C interface (needs external pullup resistor)
Pin Number
A1
A2
A3
B1
B2
B3
C1
C2
C3
D1
D2
D3
E1
Pin Name
VOUT1
GND
LED_OUT1
VOUT2
SW2
GND
SW1
SW3
LED_OUT2
SCL
GNDA
VIN
SDA
Description
DCDC converter output capacitor - make a short connection to C VOUT / VOUT2
Power ground; make a short connection between both balls
Flash LED current sink
DCDC converter output capacitor - make a short connection to C VOUT / VOUT1
DCDC converter switching node - make a short connection to SW1 /coil L DCDC
Power ground; make a short connection between both balls
DCDC converter switching node - make a short connection to SW2 / coil L DCDC
DCDC converter switching node - make a short connection to SW3 /coil L DCDC
Flash LED current sink
2
Analog ground - internally connected to GND ball A2; for improving thermal
performance connect to ground plane (optional)
Positive supply voltage input - connect to supply and make a short connection
to input capacitor C VIN and to coil L DCDC
2
www.austriamicrosystems.com/AS3647
1.5-4
3 - 37
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