Overview
The PCA9551BS,118 is an 8-bit I²C-bus LED driver produced by NXP USA Inc. This component is designed to control LEDs in I²C-bus and SMBus applications, particularly where it is necessary to limit bus traffic or free up the I²C-bus controller. It features programmable blink rates, making it versatile for various lighting applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 2.3 to 5.5 | V |
| Output Current per Bit | 25 | mA |
| Total Output Current per Package | 100 | mA |
| Operating Temperature (Tamb) | -40 to 85 | °C |
| Storage Temperature (Tstg) | -65 to 150 | °C |
| Clock Frequency | 0 Hz to 400 kHz | |
| ESD Protection | 2000 V HBM, 150 V MM, 1000 V CDM | |
| Package Type | 28-VQFN Exposed Pad |
Key Features
- 8-bit I²C-bus LED driver with programmable blink rates
- Two selectable, fully programmable blink rates (frequency and duty cycle) between 0.148 Hz and 38 Hz
- Input/outputs not used as LED drivers can be used as regular GPIOs
- Internal oscillator requires no external components
- I²C-bus interface logic compatible with SMBus
- Internal power-on reset and active LOW reset input
- No glitch on power-up and supports hot insertion
- Low standby current and edge rate control on outputs
- Eight open-drain outputs directly drive LEDs to 25 mA
Applications
- LED lighting in various consumer and industrial devices
- Backlighting for displays and panels
- Indicator lights in automotive and industrial control systems
- General-purpose LED control in embedded systems
Q & A
- What is the PCA9551BS,118 used for?
The PCA9551BS,118 is used to control LEDs in I²C-bus and SMBus applications, allowing for programmable blink rates and GPIO expansion.
- What is the operating voltage range of the PCA9551BS,118?
The operating voltage range is from 2.3 V to 5.5 V.
- How many LEDs can the PCA9551BS,118 control?
The PCA9551BS,118 can control up to 8 LEDs.
- What is the maximum output current per bit?
The maximum output current per bit is 25 mA.
- Does the PCA9551BS,118 support hot insertion?
Yes, it supports hot insertion.
- What is the clock frequency range of the I²C-bus interface?
The clock frequency range is from 0 Hz to 400 kHz.
- Can unused I/O pins be used as GPIOs?
Yes, input/outputs not used as LED drivers can be used as regular GPIOs.
- What is the storage temperature range for the PCA9551BS,118?
The storage temperature range is from -65°C to 150°C.
- Does the PCA9551BS,118 have ESD protection?
Yes, it has ESD protection exceeding 2000 V HBM, 150 V MM, and 1000 V CDM.
- What package type is the PCA9551BS,118 available in?
The PCA9551BS,118 is available in a 28-VQFN Exposed Pad package.
