PCA9532 系列 16 位 I2C总线和SMBus I/O 扩展器 LED 调光器 - SOIC - 24
Overview
The PCA9532 is a 16-bit I²C-bus and SMBus I/O expander optimized for dimming LEDs in 256 discrete steps for Red/Green/Blue RGB color mixing and back light applications.
The PCA9532 contains an internal oscillator with two user programmable blink rates and duty cycles coupled to the output PWM. The LED brightness is controlled by setting the blink rate high enough > 100 Hz that the blinking cannot be seen and then using the duty cycle to vary the amount of time the LED is on and thus the average current through the LED.
The initial setup sequence programs the two blink rates/duty cycles for each individual PWM. From then on, only one command from the bus master is required to turn individual LEDs ON, OFF, BLINK RATE 1 or BLINK RATE 2. Based on the programmed frequency and duty cycle, BLINK RATE 1 and BLINK RATE 2 will cause the LEDs to appear at a different brightness or blink at periods up to 1.69 second. The open-drain outputs directly drive the LEDs with maximum output sink current of 25 mA per bit and 200 mA per package 100 mA per octal.
To blink LEDs at periods greater than 1.69 second the bus master MCU, MPU, DSP, chip set, etc. must send repeated commands to turn the LED on and off as is currently done when using normal I/O expanders like the Semiconductors PCF8575 or PCA9555. Any bits not used for controlling the LEDs can be used for General Purpose parallel Input/Output GPIO expansion, which provides a simple solution when additional I/O is needed for ACPI power switches, sensors, push-buttons, alarm monitoring, fans, etc.
The active LOW hardware reset pin RESET and Power-On Reset POR initializes the registers to their default state, all zeroes, causing the bits to be set HIGH LED off.
Three hardware address pins on the PCA9532 allow eight devices to operate on the same bus.
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## Features
* 16 LED drivers on, off, flashing at a programmable rate
* Two selectable, fully programmable blink rates frequency and duty cycle between 0.591 Hz and 152 Hz 1.69 second and 6.58 milliseconds
* 256 brightness steps
* 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
* Noise filter on SCL/SDA inputs
* Active LOW reset input
* 16 open-drain outputs directly drive LEDs to 25 mA
* Controlled edge rates to minimize ground bounce
* No glitch on power-up
* Supports hot insertion
* Low standby current
* Operating power supply voltage range of 2.3 V to 5.5 V
* 0 Hz to 400 kHz clock frequency
* ESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
* Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
* Packages offered: SO24, TSSOP24, HVQFN24
## Features
频率 400 kHz
输出接口数 16
针脚数 24
耗散功率 400 mW
开关频率 400 kHz
输入电压Max 5.5 V
输入电压Min 2.3 V
输出电流Max 200 mA
工作温度Max 85 ℃
工作温度Min -40 ℃
电源电压 2.3V ~ 5.5V
输入电压 2.3V ~ 5.5V
安装方式 Surface Mount
引脚数 24
封装 SOIC-24
封装 SOIC-24
工作温度 -40℃ ~ 85℃
产品生命周期 Active
包装方式 Bulk
制造应用 背光
RoHS标准 RoHS Compliant
含铅标准 Lead Free
ECCN代码 EAR99
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
PCA9532D,112 NXP 恩智浦 | 当前型号 | 当前型号 |
PCA9532D 恩智浦 | 完全替代 | PCA9532D,112和PCA9532D的区别 |
PCA9532D,118 恩智浦 | 功能相似 | PCA9532D,112和PCA9532D,118的区别 |