Data Sheet

PCA9685 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved.
Product data sheet Rev. 3 — 2 September 2010 34 of 51
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I
2
C-bus LED controller
10. Application design-in information
I
2
C-bus address = 1010 101x.
All 16 of the LEDn outputs configurable as either open-drain or totem pole. Mixing of configuration is not possible.
Remark: Set INVRT = 0, OUTDRV = 1, OUTNE = 01 (MODE2 register bits)
(1) Resistor value should be chosen by referencing section 7 of UM10204, “I
2
C-bus specification and user manual”.
(2) OE
requires pull-up resistor if control signal from the master is open-drain.
Fig 26. Typical application
PCA9685
LED0
LED1
SDA
SCL
OE
V
DD
= 2.5 V, 3.3 V or 5.0 V
I
2
C-BUS/SMBus
MASTER
002aac827
SDA
SCL
(1)
OE
(1)
LED2
LED3
A0
A1
A2
V
DD
A3
A4
A5
V
SS
5 V
10 kΩ
(2)
12 V
LED4
LED8
LED9
LED10
LED11
LED12
LED13
LED14
LED15
EXTCLK
5 V
12 V
LED5
LED6
LED7
5 V
12 V
5 V
12 V