AS3643 datasheet(3/34 Pages) AMSCO

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AS3643

Datasheet, Confidential - P i n o u t

4 Pinout

Pin Assignment

Figure 2. Pin Assignments (Top View)

Pin Description

Table 1. Pin Description for AS3643

Pin Number

Pin Name

Description

VOUT1

DCDC converter output capacitor - make a short connection to CVOUT / VOUT2

GND

Power and analog ground; make a short connection between both balls

LED_OUT1

Flash LED current sink

SW1

DCDC converter switching node - make a short connection to SW2 / coil LDCDC

GND

Power and analog ground; make a short connection between both balls

VOUT2

DCDC converter output capacitor - make a short connection to CVOUT / VOUT1

SW2

DCDC converter switching node - make a short connection to SW1 /coil LDCDC

LED_OUT2

Flash LED current sink

SCL

serial clock input for I

2C interface

VIN

Positive supply voltage input - connect to supply and make a short connection

to input capacitor CVIN and to coil LDCDC

SDA

serial data input/output for I

2C interface (needs external pullup resistor)

STROBE

Digital input with pulldown to control strobe time for flash function

TXMASK/

TORCH

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

Function 2: Operate torch current level without using the I

2C interface to

operate the torch without need to start a camera processor (if the I

2C is

connected to the camera processor

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AS3643

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