PCA9551PW,112 NXP Semiconductors, PCA9551PW,112 Datasheet - Page 11

• 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
8. Application design-in information
PCA9551_8
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
2
C-BUS/SMBus
MASTER
I
is about 1.2 V less than V
5 V
LED0 to LED5 are used as LED drivers.
LED6 and LED7 are used as regular GPIOs.
the LED
shows a high value resistor in parallel with the LED.
V
DD
SDA
SCL
LEDn
DD
DD
DD
and is specified as I
and prevents additional supply current consumption when the LED is off.
10 k
when the I/Os are used to control LEDs
Figure
Rev. 08 — 31 July 2008
10 k
LED
14. Since the LED acts as a diode, when the LED is off the
10 k
8-bit I
002aac189
100 k
DD
SDA
SCL
RESET
A2
A1
A0
V
V
. The supply current, I
SS
DD
2
DD
C-bus LED driver with programmable blink rates
PCA9551
in
V
DD
Table 12 “Static
002aac510
LED0
LED1
LED2
LED3
LED4
LED5
LED6
LED7
Fig 16. Device supplied by a lower voltage
DD
characteristics”.
, increases as V
3.3 V
V
DD
LEDn
Figure 16
DD
5 V
when the LED is off.
PCA9551
5 V
002aac190
© NXP B.V. 2008. All rights reserved.
shows V
DD
LED
I
becomes
through a
DD
GPIOs
11 of 26
less
I