PCA9634PW NXP Semiconductors, PCA9634PW Datasheet - Page 17

• 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 14.
When OE = 1, LED output state is controlled only by OUTNE[1:0] bits (MODE2 register).
[1]
[2]
[3]
PCA9634_6
Product data sheet
INVRT OUTDRV Direct connection to LEDn
0
0
1
1
Correct configuration when LEDs directly connected to the LEDn outputs (connection to V
Optimum configuration when external P-type (PNP, PMOS) driver used.
Optimum configuration when external N-type (NPN, NMOS) driver used.
0
1
0
1
Use of INVRT and OUTDRV based on connection to the LEDn outputs when OE = 0
7.7 Using the PCA9634 with and without external drivers
Firmware
formulas and LED
output state values
apply
formulas and LED
output state values
apply
formulas and LED
output state values
inverted
formulas and LED
output state values
inverted
The PCA9634 LED output drivers are 5.5 V only tolerant and can sink up to 25 mA at 5 V.
If the device needs to drive LEDs to a higher voltage and/or higher current, use of an
external driver is required.
[1]
[1]
•
•
INVRT bit (MODE2 register) can be used to keep the LED PWM control firmware the
same (PWMx and GRPPWM values directly calculated from their respective formulas
and the LED output state determined by LEDOUT register value) independently of the
type of external driver. This bit allows LED output polarity inversion/non-inversion only
when OE = 0.
OUTDRV bit (MODE2 register) allows minimizing the amount of external components
required to control the external driver (N-type or P-type device).
External
pull-up
resistor
LED current
limiting R
LED current
limiting R
LED current
limiting R
LED current
limiting R
Rev. 06 — 12 September 2008
[1]
[1]
External N-type driver
Firmware
formulas and LED
output state
values inverted
formulas and LED
output state
values inverted
formulas and LED
output state
values apply
formulas and LED
output state
values apply
[3]
External
pull-up
resistor
required
not required formulas and LED
required
not
required
DD
[3]
through current limiting resistor).
8-bit Fm+ I
External P-type driver
Firmware
formulas and LED
output state values
apply
output state values
apply
formulas and LED
output state values
inverted
formulas and LED
output state values
inverted
[2]
PCA9634
2
© NXP B.V. 2008. All rights reserved.
C-bus LED driver
External
pull-up
resistor
required
not
required
required
not required
17 of 38
[2]