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PDF PCA9633 Data sheet ( Hoja de datos )
| Número de pieza | PCA9633 | |
| Descripción | 4-bit Fm I2C-bus LED driver | |
| Fabricantes | NXP Semiconductors | |
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PCA9633
4-bit Fm+ I2C-bus LED driver
Rev. 03 — 20 December 2006
Product data sheet
1. General description
The PCA9633 is an I2C-bus controlled 4-bit LED driver optimized for
Red/Green/Blue/Amber (RGBA) color mixing applications. 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. A fifth 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 LED output driver is
programmed to be either open-drain with a 25 mA current sink capability at 5 V or
totem-pole with a 25 mA sink, 10 mA source capability at 5 V. The PCA9633 operates with
a supply voltage range of 2.3 V to 5.5 V and the outputs are 5.5 V tolerant. LEDs can be
directly connected to the LED output (up to 25 mA, 5.5 V) or controlled with external
drivers and a minimum amount of discrete components for larger current or higher voltage
LEDs.
The PCA9633 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) allows asynchronous control of the LED
outputs and can be used to set all the outputs to a defined I2C-bus programmable logic
state. The OE can also be used to externally PWM the outputs, which is useful when
multiple devices need to be dimmed or blinked together using software control. This
feature is available for the 16-pin version only.
Software programmable LED Group and three Sub Call I2C addresses allow all or defined
groups of PCA9633 devices to respond to a common I2C 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.
The PCA9633 is offered with 3 different I2C-bus address options: fixed I2C-bus address
(8-pin version), 4 different I2C-bus addresses from 2 programmable address pins (10-pin
version), and 126 different I2C-bus addresses from 7 programmable address pins (16-pin
version). They are software identical except for the different number of address
combinations.
The Software Reset (SWRST) Call allows the master to perform a reset of the PCA9633
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.
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6. Pinning information
6.1 Pinning
PCA9633
4-bit Fm+ I2C-bus LED driver
LED0 1
LED1 2
LED2 3
LED3 4
PCA9633DP1
8 VDD
7 SDA
6 SCL
5 VSS
002aab314
Fig 2. Pin configuration for TSSOP8
LED0 1
LED1 2
LED2 3
LED3 4
A0 5
PCA9633DP2
10 VDD
9 SDA
8 SCL
7 A1
6 VSS
002aab315
Fig 3. Pin configuration for TSSOP10
A0 1
A1 2
LED0 3
LED1 4
LED2 5
LED3 6
A2 7
A3 8
PCA9633PW
16 VDD
15 A6
14 A5
13 SDA
12 SCL
11 A4
10 OE
9 VSS
002aab316
Fig 4. Pin configuration for TSSOP16
A0 1
A1 2
16 VDD
15 A6
LED0 3
14 A5
LED1 4
13 SDA
PCA9633D16
LED2 5
12 SCL
LED3 6
11 A4
A2 7
10 OE
A3 8
9 VSS
002aab313
Fig 5. Pin configuration for SO16
terminal 1
index area
LED0 1
LED1 2
LED2 3
LED3 4
PCA9633BS
12 A5
11 SDA
10 SCL
9 A4
002aab317
Transparent top view
Fig 6. Pin configuration for HVQFN16
terminal 1
index area
LED0 1
LED1 2
LED2 3
LED3 4
PCA9633TK
8 VDD
7 SDA
6 SCL
5 VSS
002aab807
Transparent top view
Fig 7. Pin configuration for HVSON8
PCA9633_3
Product data sheet
Rev. 03 — 20 December 2006
© NXP B.V. 2006. All rights reserved.
5 of 42
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PCA9633
4-bit Fm+ I2C-bus LED driver
When the Control register is written, the register entry point determined by D[3:0] is the
first register that will be addressed (read or write operation), and can be anywhere
between 0000 and 1100 (as defined in Table 7). When AI[2] = 1, the Auto-Increment flag
is set and the rollover value at which the point where the register increment stops and
goes to the next one is determined by AI[2:0]. See Table 6 for rollover values. For
example, if the Control register = 1110 1000 (E8h), then the register addressing sequence
will be (in hex):
08 → … → 0C → 00 → … → 07 → 02 → … → 07 → 02 → … → 07 → 02 → … as long
as the master keeps sending or reading data.
7.3 Register definitions
Table 7. Register summary[1][2]
Register number (hex) D3 D2 D1 D0 Name
00h 0 0 0 0 MODE1
01h 0 0 0 1 MODE2
02h 0 0 1 0 PWM0
03h 0 0 1 1 PWM1
04h 0 1 0 0 PWM2
05h 0 1 0 1 PWM3
06h 0 1 1 0 GRPPWM
07h 0 1 1 1 GRPFREQ
08h 1 0 0 0 LEDOUT
09h 1 0 0 1 SUBADR1
0Ah 1 0 1 0 SUBADR2
0Bh 1 0 1 1 SUBADR3
0Ch 1 1 0 0 ALLCALLADR
Type
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
Function
Mode register 1
Mode register 2
brightness control LED0
brightness control LED1
brightness control LED2
brightness control LED3
group duty cycle control
group frequency
LED output state
I2C-bus subaddress 1
I2C-bus subaddress 2
I2C-bus subaddress 3
LED All Call I2C-bus address
[1] Only D[3:0] = 0000 to 1100 are allowed and will be acknowledged. D[3:0] = 1101, 1110, or 1111 are reserved and will not be
acknowledged.
[2] When writing to the Control register, bit 4 must be programmed with logic 0 for proper device operation.
PCA9633_3
Product data sheet
Rev. 03 — 20 December 2006
© NXP B.V. 2006. All rights reserved.
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| PDF Descargar | [ Datasheet PCA9633.PDF ] | |
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