Data Sheet

ADP1649

Rev. 0 | Page 7 of 28

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

Figure 4. Pin Configuration

Table 6. Pin Function Descriptions

Pin No.

Mnemonic

Description

A1

PGND

Power Ground.

A2

SGND

Signal Ground.

A3

VIN

Input Voltage for the Device. Connect an input bypass capacitor close to this pin.

B1

SW

Boost Switch. Connect the power inductor between SW and the input capacitor.

B2

GPIO2

General-Purpose Input/Output for the ILED/TxMASK2/ADC Modes. These modes are register selectable. This is

a multifunction pin for the red indicator LED current source, TxMASK2, or ADC input.

ILED Mode. For the ILED mode, connect this pin to the red LED anode. Connect the LED cathode to power

ground.

TxMASK2 Mode. TheTxMASK2 function of this pin reduces the current to the programmable TxMASK2 current.

ADC Mode. The ADC function of this pin is used as the input pin for the ADC.

B3

GPIO1

General-Purpose Input/Output for the Torch/TxMASK1 Modes. These modes are register selectable. This is a

multifunction pin for the external torch mode or TxMASK1 input.

Torch Mode. Enables the integrated circuit (IC) in direct torch mode.

TxMASK1 Mode. Reduces the flash current to the programmable TxMASK1 current.

C1

VOUT

Boost Output. Connect an output bypass capacitor very close to this pin. VOUT is the output for the 5 V

external voltage mode.

C2

STROBE

Strobe Signal Input. STROBE synchronizes the flash pulse to the image capture. In most cases, this signal

comes directly from the image sensor.

C3

EN

Enable. Set EN low to bring the quiescent current (I

brought from low to high.

D1

LED_OUT

LED Current Source. Connect the LED_OUT pin to the anode of the flash LED.

D2

SDA

D3

SCL

TOP VIEW

(BALL SIDE DOWN)

Not to Scale

PGND

SGND

VIN

SW

GPIO2

GPIO1

VOUT

STROBE

EN

LED_OUT

SDA

SCL

1

A

B

C

D

2

3

BALL A1

INDICATOR