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PDF PCA9952-Q900 Datasheet ( Hoja de datos )

Número de pieza PCA9952-Q900
Descripción 16-channel constant current LED driver
Fabricantes NXP 
Logotipo NXP Logotipo

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PCA9952-Q900 Hoja de datos, Descripción, Manual
PCA9952/Q900; PCA9955/Q900
16-channel Fm+ I2C-bus 57 mA constant current LED driver,
AEC-Q100 compliant
Rev. 1 — 26 April 2013
Product data sheet
1. General description
The PCA9952/Q900 and PCA9955/Q900 are I2C-bus controlled 16-channel constant
current LED driver optimized for dimming and blinking 57 mA Red/Green/Blue/Amber
(RGBA) LEDs in amusement products. Each LEDn output has its own 8-bit resolution
(256 steps) fixed frequency individual PWM controller that operates at 31.25 kHz with a
duty cycle that is adjustable from 0 % to 99.6 % to allow the LED to be set to a specific
brightness value. An additional 8-bit resolution (256 steps) group PWM controller has both
a fixed frequency of 122 Hz and an adjustable frequency between 15 Hz to once every
16.8 seconds with a duty cycle that is adjustable from 0 % to 99.6 % that is used to either
dim or blink all LEDs with the same value.
Each LEDn output can be off, on (no PWM control), set at its individual PWM controller
value or at both individual and group PWM controller values. The PCA9952/Q900 and
PCA9955/Q900 operate with a supply voltage range of 3 V to 5.5 V and the constant
current sink LEDn outputs allow up to 40 V for the LED supply. The output peak current is
adjustable with an 8-bit linear DAC from 225 A to 57 mA.
These devices have built-in open, short load and overtemperature detection circuitry. The
error information from the corresponding register can be read via the I2C-bus. Additionally,
a thermal shutdown feature protects the device when internal junction temperature
exceeds the limit allowed for the process.
The PCA9952/Q900 and PCA9955/Q900 devices have Fast-mode Plus (Fm+) I2C-bus
interface. Fm+ devices offer higher frequency (up to 1 MHz) or more densely populated
bus operation (up to 4000 pF).
The PCA9952/Q900 is identical to PCA9955/Q900 except for the following differences:
The PCA9952/Q900 has only three hardware address pins compared to four on
PCA9955/Q900.
The PCA9952/Q900 has an output enable pin (OE) and the PCA9955/Q900 does not.
The active LOW output enable input pin (OE), available only on PCA9952/Q900, blinks all
the LEDn outputs and can be used to externally PWM the outputs, which is useful when
multiple devices need to be dimmed or blinked together without using software control.
Software programmable LED Group and three Sub Call I2C-bus addresses allow all or
defined groups of PCA9952/Q900, PCA9955/Q900 devices to respond to a common
I2C-bus address, allowing for example, all red LEDs to be turned on or off at the same
time or marquee chasing effect, thus minimizing I2C-bus commands. On power-up,
PCA9952/Q900, PCA9955/Q900 will have a unique Sub Call address to identify it as a
16-channel LED driver. This allows mixing of devices with different channel widths. Four

1 page

PCA9952-Q900 pdf
NXP Semiconductors
PCA9952/Q900; PCA9955/Q900
16-channel Fm+ I2C-bus 57 mA constant current LED driver, AEC-Q100
6. Pinning information
6.1 Pinning
REXT 1
A0 2
A1 3
A2 4
OE 5
LED0 6
LED1 7
LED2 8
LED3 9
VSS 10
LED4 11
LED5 12
LED6 13
LED7 14
PCA9952TW/Q900
(1)
28 VDD
27 SDA
26 SCL
25 RESET
24 VSS
23 LED15
22 LED14
21 LED13
20 LED12
19 VSS
18 LED11
17 LED10
16 LED9
15 LED8
002aah647
a. PCA9952/Q900
(1) Thermal pad; connected to VSS.
Fig 2. Pin configuration for HTSSOP28
REXT 1
A0 2
A1 3
A2 4
A3 5
LED0 6
LED1 7
LED2 8
LED3 9
VSS 10
LED4 11
LED5 12
LED6 13
LED7 14
PCA9955TW/Q900
(1)
28 VDD
27 SDA
26 SCL
25 RESET
24 VSS
23 LED15
22 LED14
21 LED13
20 LED12
19 VSS
18 LED11
17 LED10
16 LED9
15 LED8
002aah648
b. PCA9955/Q900
PCA9952Q900_PCA9955Q900
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 26 April 2013
© NXP B.V. 2013. All rights reserved.
5 of 45

5 Page

PCA9952-Q900 arduino
NXP Semiconductors
PCA9952/Q900; PCA9955/Q900
16-channel Fm+ I2C-bus 57 mA constant current LED driver, AEC-Q100
If MODE1 register bit AI1 = 0 and AI0 = 1 and if the Control register = 1000 0101, then the
register addressing sequence will be (in hexadecimal):
05 06 19 0A 0B 19 0A 0B … as long as the master
keeps sending or reading data.
Remark: Writing to registers marked ‘not used’ will return NACK.
7.3 Register definitions
Table 6. Register summary[1]
Register
D6 D5 D4 D3 D2 D1 D0 Name
number
(hexadecimal)
00h 0 0 0 0 0 0 0 MODE1
01h 0 0 0 0 0 0 1 MODE2
02h 0 0 0 0 0 1 0 LEDOUT0
03h 0 0 0 0 0 1 1 LEDOUT1
04h 0 0 0 0 1 0 0 LEDOUT2
05h 0 0 0 0 1 0 1 LEDOUT3
06h 0 0 0 0 1 1 0 -
07h 0 0 0 0 1 1 1 -
08h 0 0 0 1 0 0 0 GRPPWM
09h 0 0 0 1 0 0 1 GRPFREQ
0Ah 0 0 0 1 0 1 0 PWM0
0Bh 0 0 0 1 0 1 1 PWM1
0Ch 0 0 0 1 1 0 0 PWM2
0Dh 0 0 0 1 1 0 1 PWM3
0Eh 0 0 0 1 1 1 0 PWM4
0Fh 0 0 0 1 1 1 1 PWM5
10h 0 0 1 0 0 0 0 PWM6
11h 0 0 1 0 0 0 1 PWM7
12h 0 0 1 0 0 1 0 PWM8
13h 0 0 1 0 0 1 1 PWM9
14h 0 0 1 0 1 0 0 PWM10
15h 0 0 1 0 1 0 1 PWM11
16h 0 0 1 0 1 1 0 PWM12
17h 0 0 1 0 1 1 1 PWM13
18h 0 0 1 1 0 0 0 PWM14
19h 0 0 1 1 0 0 1 PWM15
1Ah to 21h
--------
22h 0 1 0 0 0 1 0 IREF0
23h 0 1 0 0 0 1 1 IREF1
24h 0 1 0 0 1 0 0 IREF2
25h 0 1 0 0 1 0 1 IREF3
26h 0 1 0 0 1 1 0 IREF4
Type
Function
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
Mode register 1
Mode register 2
LEDn output state 0
LEDn output state 1
LEDn output state 2
LEDn output state 3
not used[1]
not used[1]
group duty cycle control
group frequency
brightness control LED0
brightness control LED1
brightness control LED2
brightness control LED3
brightness control LED4
brightness control LED5
brightness control LED6
brightness control LED7
brightness control LED8
brightness control LED9
brightness control LED10
brightness control LED11
brightness control LED12
brightness control LED13
brightness control LED14
brightness control LED15
not used[1]
output gain control register 0
output gain control register 1
output gain control register 2
output gain control register 3
output gain control register 4
PCA9952Q900_PCA9955Q900
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 26 April 2013
© NXP B.V. 2013. All rights reserved.
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