PCA9550DP,118 NXP Semiconductors, PCA9550DP,118 Datasheet - Page 11

• 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
8. Application design-in information
PCA9550_5
Product data sheet
8.1 Minimizing I
When the I/Os are used to control LEDs, they are normally connected to V
resistor as shown in
I/O V
lower than V
Designs needing to minimize current consumption, such as battery power applications,
should consider maintaining the I/O pins greater than or equal to V
Figure 15
than the LED supply voltage by at least 1.2 V. Both of these methods maintain the I/O V
at or above V
Fig 14. Typical application
Fig 15. High value resistor in parallel with
I
is about 1.2 V less than V
the LED
shows a high value resistor in parallel with the LED.
V
DD
LEDn
DD
DD
.
DD
I
and prevents additional supply current consumption when the LED is off.
2
C-BUS/SMBus
MASTER
when the I/Os are used to control LEDs
Figure
5 V
Rev. 05 — 13 October 2008
LED
SDA
SCL
14. Since the LED acts as a diode, when the LED is off the
2-bit I
002aac189
100 k
DD
10 k
. The supply current, I
V
DD
2
C-bus LED driver with programmable blink rates
10 k
10 k
Fig 16. Device supplied by a lower voltage
SDA
SCL
RESET
A0
V
SS
PCA9550
V
DD
DD
, increases as V
LED0
LED1
3.3 V
V
DD
LEDn
Figure 16
DD
002aad271
5 V
when the LED is off.
PCA9550
5 V
002aac190
© NXP B.V. 2008. All rights reserved.
shows V
DD
I
LED
becomes
through a
DD
11 of 26
less
I