PCA9685PW Datasheet, PDF (36/51 Pages) NXP Semiconductors – 16-channel, 12-bit PWM Fm+ I2C-bus LED controller

NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I²C-bus LED controller
PCA9685
Product data sheet
LED supply
V_IN
CONSTANT
CURRENT
SWITCH MODE
REGULATOR
FB
OUT
I_constant
V_DD = 2.5 V, 3.3 V or 5.0 V
ASIC/MICRO
SDA
SCL
(1)
(1)
OE
LIGHT
SENSOR
10 kΩ⁽²⁾
SDA
SCL
OE
V_DD
LED0
LED1
LED2
LED3
PCA9685
EXTCLK
LED4
LED5
LED6
LED7
LED
string
Rsense
LED8
LED9
LED10
LED11
A0
A1
A2
A3
LED12
A4
LED13
A5
LED14
V_SS
LED15
002aac828
I²C-bus address = 1010 101x.
Remark: Set INVRT = 0, OUTDRV = 1, OUTNE = 01 (MODE2 register bits) for this configuration.
(1) Resistor value should be chosen by referencing Section 7 of UM10204, “I²C-bus specification and
user manual”.
(2) OE requires pull-up resistor if control signal from the master is open-drain.
Fig 27. LCD backlighting application
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 2 September 2010
© NXP B.V. 2010. All rights reserved.
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