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Remark: Only one LED output shown for clarity.

Fig 1.

Block diagram of PCA9625

A0

A1

A2

A3

A4

A5

A6

002aac786

CONTROL

INPUT FILTER

PCA9625

POWER-ON

RESET

SCL

SDA

LED

STATE

SELECT

REGISTER

PWM

REGISTER X

BRIGHTNESS

CONTROL

GRPFREQ

REGISTER

GRPPWM

REGISTER

MUX/

CONTROL

OE

'0' – permanently OFF

'1' – permanently ON

LEDn

190 Hz

24.3 kHz

97 kHz

25 MHz

OSCILLATOR

VOLTAGE

REGULATOR

FET

DRIVER