PCA9551PW,112 NXP Semiconductors, PCA9551PW,112 Datasheet - Page 12

• Manufacturer Part Number: PCA9551PW,112
• Description: IC LED DRIVER BLINKER 16-TSSOP
• Manufacturer: NXP Semiconductors
• Type: LED Blinkerr

Specifications of PCA9551PW,112

• Package / Case: 16-TSSOP
• Topology: Open Drain, PWM
• Number Of Outputs: 8
• Internal Driver: Yes
• Type - Primary: LED Blinker
• Frequency: 400kHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 25mA
• Internal Switch(s): Yes
• Low Level Output Current: 6.5 mA
• Operating Supply Voltage: 2.3 V to 5.5 V
• 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
• For Use With: OM6285 - EVAL BOARD I2C-2002-1A568-4002 - DEMO BOARD I2C568-3615 - DEMO BOARD I2C
• Voltage - Output: -
• Efficiency: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-1048-5; 935271692112; PCA9551PW

NXP Semiconductors
9. Limiting values
PCA9551_8
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 blink at 4 Hz and
at a 25 % duty cycle.
Table 10.
Table 11.
In accordance with the Absolute Maximum Rating System (IEC 60134).
Program sequence
START
PCA9551 address with A0 to A2 = LOW
PSC0 subaddress + Auto-Increment
Set prescaler PSC0 to achieve a period of 1 second:
PSC0 = 37
Set PWM0 duty cycle to 50 %:
PWM0 = 128
Set prescaler PSC1 to achieve a period of 0.25 seconds:
PSC1 = 9
Set PWM1 output duty cycle to 25 %:
PWM1 = 192
Set LED0 to LED3 on
Set LED4 and LED5 to PWM0, and LED6 or LED7 to PWM1
STOP
Symbol
V
V
I
I
P
T
T
O(LEDn)
SS
stg
amb
DD
I/O
tot
Blink period
256 PWM0
--------------------------------
Blink period
256 PWM1
--------------------------------
–
–
256
256
Programming PCA9551
Limiting values
Parameter
supply voltage
voltage on an input/output pin
output current on pin LEDn
ground supply current
total power dissipation
storage temperature
ambient temperature
=
=
=
=
0.5
0.25
1
0.25
=
PSC0
----------------------- -
=
Rev. 08 — 31 July 2008
PSC1
----------------------- -
38
+
38
1
+
8-bit I
1
2
C-bus LED driver with programmable blink rates
Conditions
operating
Min
V
-
-
-
0.5
65
40
SS
0.5
PCA9551
© NXP B.V. 2008. All rights reserved.
Max
+6.0
5.5
100
400
+150
+85
I
S
C0h
11h
25h
80h
09h
C0h
00h
FAh
P
25
2
C-bus
12 of 26
Unit
V
V
mA
mA
mW
C
C