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PCA9952-Q900 데이터시트 PDF




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부품번호 PCA9952-Q900 기능
기능 16-channel constant current LED driver
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PCA9952-Q900 데이터시트, 핀배열, 회로
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




PCA9952-Q900 pdf, 반도체, 판매, 대치품
NXP Semiconductors
5. Block diagram
PCA9952/Q900; PCA9955/Q900
16-channel Fm+ I2C-bus 57 mA constant current LED driver, AEC-Q100
SCL
SDA
VDD
VSS
RESET
A0 A1 A2 A3/OE(1) REXT
LED0
LED1
LED14
LED15
PCA9952/Q900,
PCA9955/Q900
INPUT FILTER
POWER-ON
RESET
200 kΩ
I2C-BUS
CONTROL
I/O
REGULATOR
DAC0
individual LED
current setting
8-bit DACs
DAC1
DAC
14
DAC
15
OUTPUT DRIVER, DELAY CONTROL
AND ERROR DETECTION
INPUT
FILTER
PWM
REGISTER X
BRIGHTNESS
CONTROL
repetion rate 31.25 kHz
LED STATE
SELECT
REGISTER
÷ 256
31.25 kHz
8 MHz
OSCILLATOR
GRPFREQ
REGISTER
DIM CLOCK
GRPPWM
REGISTER
(DUTY CYCLE
CONTROL)
'0' – permanently OFF
'1' – permanently ON
MUX/
CONTROL
Dim repetition rate = 122 Hz.
Blink repetition rate = 15 Hz to every 16.8 seconds.
(1) On PCA9955/Q900 this pin is address pin A3. On PCA9952/Q900 this pin is OE.
Fig 1. Block diagram of PCA9952/Q900, PCA9955/Q900
002aah646
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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PCA9952-Q900 전자부품, 판매, 대치품
NXP Semiconductors
PCA9952/Q900; PCA9955/Q900
16-channel Fm+ I2C-bus 57 mA constant current LED driver, AEC-Q100
Table 4.
Symbol
REXT
A0
A1
A2
OE
LED0
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
LED9
LED10
LED11
LED12
LED13
LED14
LED15
RESET
SCL
SDA
VSS
VDD
PCA9952/Q900 pin description
Pin Type
Description
1I
current set resistor input; resistor to ground
2I
address input 0[1]
3I
address input 1[1]
4I
address input 2[1]
5I
active LOW output enable
6O
LED driver 0
7O
LED driver 1
8O
LED driver 2
9O
LED driver 3
11 O
LED driver 4
12 O
LED driver 5
13 O
LED driver 6
14 O
LED driver 7
15 O
LED driver 8
16 O
LED driver 9
17 O
LED driver 10
18 O
LED driver 11
20 O
LED driver 12
21 O
LED driver 13
22 O
LED driver 14
23 O
LED driver 15
25 I
active LOW reset input
26 I
serial clock line
27 I/O
serial data line
10, 19, 24[2] ground
supply ground
28 power supply supply voltage
[1] In order to obtain the best system level ESD performance, a standard pull-up resistor (10 ktypical) is
required for any address pin connecting to VDD. For additional information on system level ESD
performance, please refer to application notes AN10897 and AN11131.
[2] HTSSOP28 package supply ground is connected to both VSS pins and exposed center pad. VSS pins must
be connected to supply ground for proper device operation. For enhanced thermal, electrical, and board
level performance, the exposed pad needs to be soldered to the board using a corresponding thermal pad
on the board and for proper heat conduction through the board, thermal vias need to be incorporated in the
PCB in the thermal pad region.
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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부품번호상세설명 및 기능제조사
PCA9952-Q900

16-channel constant current LED driver

NXP Semiconductors
NXP Semiconductors

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