PCA9634PW,112 NXP Semiconductors, PCA9634PW,112 Datasheet - Page 13

• Manufacturer Part Number: PCA9634PW,112
• Description: IC LED DRIVER RGBA 20-TSSOP
• Manufacturer: NXP Semiconductors
• Type: RGBA LED Driverr

Specifications of PCA9634PW,112

• Package / Case: 20-TSSOP
• Topology: Open Drain, PWM
• Number Of Outputs: 8
• Internal Driver: Yes
• Type - Primary: Backlight, LED Blinker
• Type - Secondary: RGBA
• Frequency: 1MHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Voltage - Output: 5.5V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 25mA
• Internal Switch(s): Yes
• Low Level Output Current: 25 mA
• High Level Output Current: 50 uA
• Operating Supply Voltage: 2.3 V to 5.5 V
• Maximum Supply Current: 10 mA
• Maximum Power Dissipation: 400 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Lead Free Status / Rohs Status: Details
• Other names: 935282233112; PCA9634PW; PCA9634PW

NXP Semiconductors
PCA9634_6
Product data sheet
7.3.4 GRPPWM: Group duty cycle control
7.3.5 GRPFREQ: Group frequency
Table 8.
Legend: * default value.
When DMBLNK bit (MODE2 register) is programmed with 0, a 190 Hz fixed frequency
signal is superimposed with the 97 kHz individual brightness control signal. GRPPWM is
then used as a global brightness control allowing the LED outputs to be dimmed with the
same value. The value in GRPFREQ is then a ‘Don’t care’.
General brightness for the 8 outputs is controlled through 256 linear steps from 00h
(0 % duty cycle = LED output off) to FFh (99.6 % duty cycle = maximum brightness).
Applicable to LED outputs programmed with LDRx = 11 (LEDOUT0 and LEDOUT1
registers).
When DMBLNK bit is programmed with logic 1, GRPPWM and GRPFREQ registers
define a global blinking pattern, where GRPFREQ contains the blinking period (from
24 Hz to 10.73 s) and GRPPWM the duty cycle (ON/OFF ratio in %).
Table 9.
Legend: * default value.
GRPFREQ is used to program the global blinking period when DMBLNK bit (MODE2
register) is equal to 1. Value in this register is a ‘Don’t care’ when DMBLNK = 0.
Applicable to LED outputs programmed with LDRx = 11 (LEDOUT0 and LEDOUT1
registers).
Blinking period is controlled through 256 linear steps from 00h (41 ms, frequency 24 Hz)
to FFh (10.73 s).
duty cycle
global blinking period
Address
0Ah
Address
0Bh
GRPPWM - Group duty cycle control register (address 0Ah) bit description
Register
GRPPWM
GRPFREQ - Group Frequency register (address 0Bh) bit description
Register
GRPFREQ
=
GDC 7:0
-------------------------- -
256
Rev. 06 — 12 September 2008
Bit
7:0
Bit
7:0
=
GFRQ 7:0
--------------------------------------- - in
Symbol
GDC[7:0]
Symbol
GFRQ[7:0]
24
+
1
Access Value
R/W
Access Value
R/W
sec
onds
1111 1111
0000 0000* GRPFREQ register
8-bit Fm+ I
Description
GRPPWM register
Description
PCA9634
2
© NXP B.V. 2008. All rights reserved.
C-bus LED driver
13 of 38
(2)
(3)