PCA9550DP,118 NXP Semiconductors, PCA9550DP,118 Datasheet - Page 12

• Manufacturer Part Number: PCA9550DP,118
• Description: IC LED DRIVER BLINKER 8-TSSOP
• Manufacturer: NXP Semiconductors
• Type: LED Blinkerr

Specifications of PCA9550DP,118

• Package / Case: 8-TSSOP
• Topology: Open Drain, PWM
• Number Of Outputs: 2
• 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 Supply Current: 500 uA
• Maximum Power Dissipation: 400 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage (typ): 2.5/3.3/5V
• Number Of Segments: 2
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: TSSOP
• Pin Count: 8
• Mounting: Surface Mount
• Power Dissipation: 400mW
• Operating Supply Voltage (min): 2.3V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: OM6285 - EVAL BOARD I2C-2002-1A568-4002 - DEMO BOARD I2C
• Voltage - Output: -
• Efficiency: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-3387-2; 935272881118; PCA9550DP-T

NXP Semiconductors
9. Limiting values
PCA9550_5
Product data sheet
8.2 Programming example
The following example will show how to set LED0 to blink at 1 Hz at a 50 % duty cycle.
LED1 will be set to blink at 4 Hz and at a 25 % duty cycle.
Table 11.
Table 12.
In accordance with the Absolute Maximum Rating System (IEC 60134).
Program sequence
START
PCA9550 address with A0 = LOW
PSC0 subaddress + Auto-Increment
Set prescaler PSC0 to achieve a period of 1 second:
PSC0 = 43
Set PWM0 duty cycle to 50 %:
PWM0 = 128
Set prescaler PSC1 to achieve a period of 0.25 seconds:
PSC1 = 10
Set PWM1 output duty cycle to 25 %:
PWM1 = 192
Set LED0 to PWM0, and set LED1 to blink at 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 PCA9550
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. 05 — 13 October 2008
=
PSC1
----------------------- -
44
+
44
1
+
2-bit I
1
2
C-bus LED driver with programmable blink rates
Conditions
operating
Min
V
-
-
-
0.5
65
40
SS
0.5
PCA9550
© NXP B.V. 2008. All rights reserved.
Max
+6.0
5.5
50
400
+150
+85
I
S
C0h
11h
2Bh
80h
0Ah
C0h
0Eh
P
25
2
C-bus
12 of 26
Unit
V
V
mA
mA
mW
C
C