PCA9634PW NXP Semiconductors, PCA9634PW Datasheet - Page 12

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

Specifications of PCA9634PW

• No. Of Outputs: 8
• Output Current: 25mA
• Output Voltage: 5.5V
• Input Voltage: 2.3V To 5.5V
• Dimming Control Type: PWM
• Driver Case Style: TSSOP
• Switching Frequency: 1MHz
• Base Number: 9634
• Operating: RoHS Compliant
• Number Of Segments: 16
• Low Level Output Current: 200 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
• Package / Case: TSSOP-20
• Minimum Operating Temperature: - 40 C
• Led Driver Application: RGB Or RGBA LED Drivers, LED Status Information, Displays, Backlights
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Details

NXP Semiconductors
Table 6.
Legend: * default value.
[1]
[2]
[3]
PCA9634_6
Product data sheet
Bit
1 to 0
See
mode. Some newer LEDs include integrated Zener diodes to limit voltage transients, reduce EMI and protect the LEDs, and these must
be driven only in the open-drain mode to prevent overheating the IC.
Change of the outputs at the STOP command allows synchronizing outputs of more than one PCA9634. Applicable to registers from
02h (PWM0) to 0Dh (LEDOUT) only.
See
Section 7.7 “Using the PCA9634 with and without external drivers”
Section 7.4 “Active LOW output enable input”
Symbol
OUTNE[1:0]
MODE2 - Mode register 2 (address 01h) bit description
7.3.3 PWM0 to PWM7: Individual brightness control
[3]
Table 7.
Legend: * default value.
A 97 kHz fixed frequency signal is used for each output. Duty cycle is controlled through
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 and LEDOUT1 registers).
duty cycle
Access
R/W
Address
02h
03h
04h
05h
06h
07h
08h
09h
Register
PWM0
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
PWM7
PWM0 to PWM7 - PWM registers 0 to 7 (address 02h to 09h) bit description
=
Value
00
01*
10
11
------------------------
IDC 7:0
256
Description
when OE = 1 (output drivers not enabled), LEDn = 0
when OE = 1 (output drivers not enabled):
when OE = 1 (output drivers not enabled), LEDn = high-impedance
reserved
Rev. 06 — 12 September 2008
for more details.
Bit
7:0
7:0
7:0
7:0
7:0
7:0
7:0
7:0
LEDn = 1 when OUTDRV = 1
LEDn = high-impedance when OUTDRV = 0 (same as OUTNE[1:0] = 10)
Symbol
IDC0[7:0]
IDC1[7:0]
IDC2[7:0]
IDC3[7:0]
IDC4[7:0]
IDC5[7:0]
IDC6[7:0]
IDC7[7:0]
for more details. Normal LEDs can be driven directly in either
Access Value
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
…continued
0000 0000* PWM0 Individual Duty Cycle
0000 0000* PWM1 Individual Duty Cycle
0000 0000* PWM2 Individual Duty Cycle
0000 0000* PWM3 Individual Duty Cycle
0000 0000* PWM4 Individual Duty Cycle
0000 0000* PWM5 Individual Duty Cycle
0000 0000* PWM6 Individual Duty Cycle
0000 0000* PWM7 Individual Duty Cycle
8-bit Fm+ I
Description
PCA9634
2
© NXP B.V. 2008. All rights reserved.
C-bus LED driver
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