PCA9532D NXP Semiconductors, PCA9532D Datasheet - Page 14

• Manufacturer Part Number: PCA9532D
• Description: LED Drivers I2C LED DIMMER 16BIT
• Manufacturer: NXP Semiconductors

Specifications of PCA9532D

• Number Of Digits: 16
• Low Level Output Current: 6.5 mA
• Operating Supply Voltage: 2.3 V to 5.5 V
• Maximum Supply Current: 200 mA
• Maximum Power Dissipation: 400 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-137
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PCA9532D,112

NXP Semiconductors
PCA9532_4
Product data sheet
8.2 Programming example
The following example will show how to set LED0 to LED3 on. It will then set LED4 and
LED5 to blink at 1 Hz at a 50 % duty cycle. LED6 and LED7 will be set to be dimmed at
25 % of their maximum brightness (duty cycle = 25 %). LED8 to LED15 will be set to off.
Table 11.
Program sequence
START
PCA9532 address with A0 to A2 = LOW
PSC0 subaddress + Auto-Increment
Set prescaler PSC0 to achieve a period of 1 second:
PSC0 = 151
Set PWM0 duty cycle to 50 %:
PWM0 = 128
Set prescaler PCS1 to dim at maximum frequency:
PSC1 = 0
Set PWM1 output duty cycle to 25 %:
PWM1 = 64
Set LED0 to LED3 on
Set LED4 and LED5 to PWM0, and LED6 or LED7 to PWM1
Set LED8 to LED11 off
Set LED12 to LED15 off
STOP
Fig 15. High value resistor in parallel with
Blink period
PWM0
-----------------
Blink period
PWM1
-----------------
256
256
the LED
=
=
V
Programming PCA9532
DD
0.5
0.25
LEDn
=
=
1
max
=
PSC0
----------------------- -
Rev. 04 — 17 March 2009
152
LED
+
1
002aac189
100 k
V
DD
Fig 16. Device supplied by a lower voltage
3.3 V
V
16-bit I
DD
LEDn
2
C-bus LED dimmer
PCA9532
5 V
002aac190
© NXP B.V. 2009. All rights reserved.
LED
I
S
C0h
12h
97h
80h
00h
40h
55h
FAh
00h
00h
P
2
C-bus
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