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PDF PCA9622 Data sheet ( Hoja de datos )
| Número de pieza | PCA9622 | |
| Descripción | 16-bit Fm I2C-bus 100 mA 40 V LED driver | |
| Fabricantes | NXP Semiconductors | |
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PCA9622
16-bit Fm+ I2C-bus 100 mA 40 V LED driver
Rev. 4 — 6 September 2012
Product data sheet
1. General description
The PCA9622 is an I2C-bus controlled 16-bit LED driver optimized for voltage switch
dimming and blinking 100 mA Red/Green/Blue/Amber (RGBA) LEDs. Each LED output
has its own 8-bit resolution (256 steps) fixed frequency individual PWM controller that
operates at 97 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 190 Hz and an adjustable frequency
between 24 Hz to once every 10.73 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 LED 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 PCA9622 operates with
a supply voltage range of 2.3 V to 5.5 V and the 100 mA open-drain outputs allow
voltages up to 40 V.
The PCA9622 is one of the first LED controller devices in a new Fast-mode Plus (Fm+)
family. Fm+ devices offer higher frequency (up to 1 MHz) and more densely populated
bus operation (up to 4000 pF).
The active LOW Output Enable input pin (OE) blinks all the LED 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 softwarewww.DataSheet.net/ control.
Software programmable LED Group and three Sub Call I2C-bus addresses allow all or
defined groups of PCA9622 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. Seven hardware address pins allow up to
126 devices on the same bus.
The Software Reset (SWRST) Call allows the master to perform a reset of the PCA9622
through the I2C-bus, identical to the Power-On Reset (POR) that initializes the registers to
their default state causing the outputs to be set HIGH (LED off). This allows an easy and
quick way to reconfigure all device registers to the same condition.
The PCA9622, PCA9625 and PCA9635 software is identical and if the PCA9622 on-chip
100 mA NAND FETs do not provide enough current or voltage to drive the LEDs, then the
PCA9635 with larger current or higher voltage external drivers can be used.
Datasheet pdf - http://www.DataSheet4U.co.kr/
1 page  
NXP Semiconductors
PCA9622
16-bit Fm+ I2C-bus 100 mA 40 V LED driver
Table 2.
Symbol
VSS
LED10
LED11
LED12
LED13
VSS
LED14
LED15
OE
A5
A6
SCL
SDA
VDD
Pin description …continued
Pin Type
19 power supply
20 O
21 O
22 O
23 O
24 power supply
25 O
26 O
27 I
28 I
29 I
30 I
31 I/O
32 power supply
Description
supply ground
LED driver 10
LED driver 11
LED driver 12
LED driver 12
supply ground
LED driver 14
LED driver 15
active LOW output enable
address input 5
address input 6
serial clock line
serial data line
supply voltage
7. Functional description
Refer to Figure 1 “Block diagram of PCA9622”.
7.1 Device addresses
www.DataSheet.net/
Following a START condition, the bus master must output the address of the slave it is
accessing.
There are a maximum of 128 possible programmable addresses using the 7 hardware
address pins. Two of these addresses, Software Reset and LED All Call, cannot be used
because their default power-up state is ON, leaving a maximum of 126 addresses. Using
other reserved addresses, as well as any other Sub Call address, will reduce the total
number of possible addresses even further.
7.1.1 Regular I2C-bus slave address
The I2C-bus slave address of the PCA9622 is shown in Figure 3. To conserve power, no
internal pull-up resistors are incorporated on the hardware selectable address pins and
they must be pulled HIGH or LOW.
Remark: Using reserved I2C-bus addresses will interfere with other devices, but only if
the devices are on the bus and/or the bus will be open to other I2C-bus systems at some
later date. In a closed system where the designer controls the address assignment these
addresses can be used since the PCA9622 treats them like any other address. The
LED All Call, Software Rest and PCA9564 or PCA9665 slave address (if on the bus) can
never be used for individual device addresses.
• PCA9622 LED All Call address (1110 000) and Software Reset (0000 0110) which are
active on start-up
• PCA9564 (0000 000) or PCA9665 (1110 000) slave address which is active on
start-up
PCA9622
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 September 2012
© NXP B.V. 2012. All rights reserved.
5 of 39
Datasheet pdf - http://www.DataSheet4U.co.kr/
5 Page 
NXP Semiconductors
PCA9622
16-bit Fm+ I2C-bus 100 mA 40 V LED driver
7.3.3 PWM0 to PWM15, individual brightness control
Table 7. PWM0 to PWM15 - PWM registers 0 to 15 (address 02h to 11h) bit description
Legend: * default value.
Address Register Bit Symbol Access Value
Description
02h PWM0 7:0 IDC0[7:0] R/W 0000 0000* PWM0 Individual Duty Cycle
03h PWM1 7:0 IDC1[7:0] R/W 0000 0000* PWM1 Individual Duty Cycle
04h PWM2 7:0 IDC2[7:0] R/W 0000 0000* PWM2 Individual Duty Cycle
05h PWM3 7:0 IDC3[7:0] R/W 0000 0000* PWM3 Individual Duty Cycle
06h PWM4 7:0 IDC4[7:0] R/W 0000 0000* PWM4 Individual Duty Cycle
07h PWM5 7:0 IDC5[7:0] R/W 0000 0000* PWM5 Individual Duty Cycle
08h PWM6 7:0 IDC6[7:0] R/W 0000 0000* PWM6 Individual Duty Cycle
09h PWM7 7:0 IDC7[7:0] R/W 0000 0000* PWM7 Individual Duty Cycle
0Ah PWM8 7:0 IDC8[7:0] R/W 0000 0000* PWM8 Individual Duty Cycle
0Bh PWM9 7:0 IDC9[7:0] R/W 0000 0000* PWM9 Individual Duty Cycle
0Ch PWM10 7:0 IDC10[7:0] R/W 0000 0000* PWM10 Individual Duty Cycle
0Dh PWM11 7:0 IDC11[7:0] R/W 0000 0000* PWM11 Individual Duty Cycle
0Eh PWM12 7:0 IDC12[7:0] R/W 0000 0000* PWM12 Individual Duty Cycle
0Fh PWM13 7:0 IDC13[7:0] R/W 0000 0000* PWM13 Individual Duty Cycle
10h PWM14 7:0 IDC14[7:0] R/W 0000 0000* PWM14 Individual Duty Cycle
11h PWM15 7:0 IDC15[7:0] R/W 0000 0000* PWM15 Individual Duty Cycle
A 97 kHz fixed frequency signal is used for each output. Duty cycle is controlled through
www.DataSheet.net/
256 linear steps from 00h (0 % duty cycle = LED output off) to FFh
(99.6 % duty cycle = LED output at maximum brightness). Applicable to LED outputs
programmed with LDRx = 10 or 11 (LEDOUT0 to LEDOUT3 registers).
duty cycle = I---D-----C----x-----7----:--0----
256
(1)
PCA9622
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 September 2012
© NXP B.V. 2012. All rights reserved.
11 of 39
Datasheet pdf - http://www.DataSheet4U.co.kr/
11 Page | ||
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