pca9635 NXP Semiconductors, pca9635 Datasheet - Page 17

• Manufacturer Part Number: pca9635
• Description: Pca9635 16-bit Fm I2c-bus Led Driver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 14.
[1]
[2]
[3]
[4]
Table 15.
PCA9635_5
Product data sheet
INVRT OUTDRV Direct connection to LEDn
0
0
1
1
LEDOUT
00
LED driver off
01
LED driver on
10
Individual
brightness
control
When OE = 1, LED output state is controlled only by OUTNE[1:0] bits (MODE2 register).
Correct configuration when LEDs directly connected to the LEDn outputs (connection to V
Optimum configuration when external N-type (NPN, NMOS) driver used.
Optimum configuration when external P-type (PNP, PMOS) driver used.
0
1
0
1
Use of INVRT and OUTDRV based on connection to the LEDn outputs when OE = 0
Output transistors based on LEDOUT registers, INVRT and OUTDRV bits when OE = 0
INVRT
0
0
1
1
0
0
1
1
0
0
1
1
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
[2]
[2]
OUTDRV
0
1
0
1
0
1
0
1
0
1
0
1
Upper transistor
(V
off
on
off
off
off
off
off
on
off
individual PWM
(non-inverted)
off
individual PWM
(inverted)
External
pull-up
resistor
LED current
limiting R
LED current
limiting R
LED current
limiting R
LED current
limiting R
DD
to LEDn)
Rev. 05 — 22 March 2007
[2]
[2]
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
Lower transistor
(LEDn to V
off
off
on
on
on
on
off
off
individual PWM
(non-inverted)
individual PWM
(non-inverted)
individual PWM
(inverted)
individual PWM
(inverted)
[3]
SS
)
External
pull-up
resistor
required
not required formulas and LED
required
not
required
LEDn state
high-Z
V
V
V
V
V
high-Z
V
V
V
high-Z
V
DD
SS
SS
SS
SS
DD
SS
SS
DD
DD
[3]
or high-Z
or V
or V
through current limiting resistor).
[2]
[2]
[2]
16-bit Fm+ I
DD
SS
or V
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
= PWMx value
= 1
SS
[2]
[4]
= PWMx value
= 1
PWMx value
[1]
PCA9635
PWMx value
2
© NXP B.V. 2007. All rights reserved.
C-bus LED driver
[1]
External
pull-up
resistor
required
not
required
required
not required
17 of 34
[4]