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PDF PCA9626 Data sheet ( Hoja de datos )
| Número de pieza | PCA9626 | |
| Descripción | 24-bit Fm+ I2C-bus 100 MA 40V LED Driver | |
| Fabricantes | NXP Semiconductors | |
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PCA9626
24-bit Fm+ I2C-bus 100 mA 40 V LED driver
Rev. 01 — 2 June 2009
Product data sheet
1. General description
The PCA9626 is an I2C-bus controlled 24-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 PCA9626 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 PCA9626 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 software control.
Software programmable LED Group and three Sub Call I2C-bus addresses allow all or
defined groups of PCA9626 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 PCA9626
through the I2C-bus, identical to the Power-On Reset (POR) that initializes the registers to
their default state causing the output NAND FETs to be OFF (LED off). This allows an
easy and quick way to reconfigure all device registers to the same condition.
In addition to these features found in PCA9633, PCA9634, PCA9635, PCA9622 and
PCA9624, a new feature to control LED output pattern is incorporated in the PCA9626. A
new control byte called ‘Chase Byte’ allows enabling or disabling of selective LED outputs
depending on the value of the Chase Byte. This feature greatly reduces the number of
bytes to be sent to the PCA9626 when repetitive patterns need to be displayed as in
creating a marquee chasing effect.
If the PCA9626 on-chip 100 mA NAND FETs do not provide enough current or voltage to
drive the LEDs, then the PCA9635 and the PCA9635 with larger current or higher voltage
external drivers can be used.
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6. Pinning information
6.1 Pinning
PCA9626
24-bit Fm+ I2C-bus 100 mA 40 V LED driver
VSS 1
LED0 2
LED1 3
LED2 4
LED3 5
VSS
VSS
LED4
6
7
8
LED5 9
LED6 10
LED7 11
VSS 12
PCA9626B
Fig 2. Pin configuration for LQFP48
36 VSS
35 LED19
34 LED18
33 LED17
32 LED16
31 VSS
30 VSS
29 LED15
28 LED14
27 LED13
26 LED12
25 VSS
002aad662
terminal 1
index area
VSS 1
LED0 2
LED1 3
LED2 4
LED3 5
VSS
VSS
LED4
6
7
8
LED5 9
LED6 10
LED7 11
VSS 12
PCA9626BS
Transparent top view
Fig 3. Pin configuration for HVQFN48
PCA9626_1
Product data sheet
Rev. 01 — 2 June 2009
36 VSS
35 LED19
34 LED18
33 LED17
32 LED16
31 VSS
30 VSS
29 LED15
28 LED14
27 LED13
26 LED12
25 VSS
002aad609
© NXP B.V. 2009. All rights reserved.
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PCA9626
24-bit Fm+ I2C-bus 100 mA 40 V LED driver
Table 4. Register summary[1][2] …continued
Register number D5 D4 D3 D2 D1 D0 Name
(hex)
Type
Function
14
0 1 0 1 0 0 PWM18
read/write brightness control LED18
15
0 1 0 1 0 1 PWM19
read/write brightness control LED19
16
0 1 0 1 1 0 PWM20
read/write brightness control LED20
17
0 1 0 1 1 1 PWM21
read/write brightness control LED21
18
0 1 1 0 0 0 PWM22
read/write brightness control LED22
19
0 1 1 0 0 1 PWM23
read/write brightness control LED23
1A
0 1 1 0 1 0 GRPPWM
read/write group duty cycle control
1B 0 1 1 0 1 1 GRPFREQ read/write group frequency
1C
0 1 1 1 0 0 CHASE
read/write chase control
1D
0 1 1 1 0 1 LEDOUT0
read/write LED output state 0
1E
0 1 1 1 1 0 LEDOUT1
read/write LED output state 1
1F
0 1 1 1 1 1 LEDOUT2
read/write LED output state 2
20
1 0 0 0 0 0 LEDOUT3
read/write LED output state 3
21
1 0 0 0 0 1 LEDOUT4
read/write LED output state 4
22
1 0 0 0 1 0 LEDOUT5
read/write LED output state 5
23
1 0 0 0 1 1 SUBADR1
read/write I2C-bus subaddress 1
24
1 0 0 1 0 0 SUBADR2
read/write I2C-bus subaddress 2
25
1 0 0 1 0 1 SUBADR3
read/write I2C-bus subaddress 3
26 1 0 0 1 1 0 ALLCALLADR read/write LED All Call I2C-bus address
[1] Only D[5:0] = 00 0000 to 10 0110 are allowed and will be acknowledged. D[5:0] = 10 0111 to 11 1111 are reserved and may not be
acknowledged.
[2] When writing to the Control register, bit 6 should be programmed with logic 0 for proper device operation.
PCA9626_1
Product data sheet
Rev. 01 — 2 June 2009
© NXP B.V. 2009. All rights reserved.
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet PCA9626.PDF ] | |
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