WMSIC Electronic Components

PCA9957HNMP

ModelPCA9957HNMP
PackageVQFN-40-EP(5x5)
BrandNXP
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 24+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
NXP PCA9957HNMP
Type
NXP
Minimum package
6000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
NXP
Electronic Component
PCA9957HNMP
Electronic Component
1
Package
VQFN-40-EP(5x5)
Type
DC-DC
Electronic Component
LEDDriver
Electronic Component
PWM
Electronic Component
0.38g
Electronic Component
1
Channel Count
24
Features
(SCP); LED; (OTP)
Electronic Component
BM0265872422
Operating Temperature
40℃~+85℃
Switching Frequency
31.25kHz
Electronic Component
6.5%

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

NXP PCA9957HNMP LED驱动器IC产品概述

PCA9957HNMP是恩智浦(NXP)推出的一款24通道线性PWM调光LED驱动器IC,专为需要多通道LED精确控制、调光及安全保护的应用场景设计,兼具小封装、宽温适应性与高可靠性,可满足工业、消费电子等领域的多样化需求。

一、核心身份与定位

该器件属于恩智浦LED驱动产品线,聚焦多通道LED恒流驱动+PWM调光的核心需求,针对单芯片需控制24路LED的场景优化设计,解决了多LED通道亮度一致性、调光稳定性及系统安全保护等关键问题,是替代传统离散驱动方案的集成化优选器件。

二、关键技术参数解析

PCA9957HNMP的技术参数覆盖了LED驱动的核心性能指标,关键参数及实际意义如下:

  • 工作电压范围:2.7V~5.5V DC,兼容主流MCU(如3.3V、5V系统)的供电,无需额外电平转换;
  • PWM调光频率:31.25kHz,处于人眼无闪烁感知区间(通常20kHz以上),保证调光时视觉舒适度;
  • 输出电流:32mA(恒流模式),满足常规小功率LED的驱动需求,避免过流损坏;
  • 恒流精度:±6.5%(典型值),确保24个输出通道的LED亮度差异极小,提升显示/指示均匀性;
  • 通信接口:SPI(串行外设接口),支持高速数据传输,便于多器件级联或与MCU快速交互。

三、核心功能特性

1. 24通道精准恒流驱动

芯片集成24个独立恒流输出通道,每通道32mA恒流能力,通过内部补偿电路实现±6.5%的精度,可直接驱动24路LED(无需额外电阻或离散恒流元件),简化PCB布局,降低系统成本。

2. 线性PWM调光

采用线性PWM调光技术,结合31.25kHz的固定频率,实现从0%到100%的宽范围调光(调光比可灵活配置),无颜色偏移问题(相比模拟调光),同时避免人眼感知闪烁,适合需要精细亮度调节的场景(如指示灯、小显示面板)。

3. 多重安全保护机制

内置三大核心保护功能,提升系统可靠性:

  • 过温保护(OTP):当芯片结温超过阈值时,自动关断输出或降低电流,防止过热损坏;
  • 开路保护:检测到某通道LED开路时,自动关断该通道,避免电流异常;
  • 短路保护(SCP):输出短路时快速响应,限制电流并关断对应通道,保护IC及下游LED。

4. 灵活的系统集成

  • SPI通信:支持标准SPI协议,可与主流MCU(如ARM、AVR)直接通信,实现通道使能、调光比设置、状态读取等功能;
  • 小封装设计:HVQFN-40(5×5mm)封装,厚度薄、引脚间距紧凑,适合高密度PCB布局(如小型设备、面板)。

四、环境适应性与可靠性

  • 宽工作温度范围:-40℃~+85℃,覆盖工业级环境(如户外设备、车间控制面板)及消费电子的极端温度场景;
  • 高可靠性:集成保护机制+恩智浦成熟的半导体工艺,降低系统故障率,适合长期稳定运行的应用。

五、典型应用场景

PCA9957HNMP的特性使其适用于以下场景:

  1. 工业控制面板:多通道LED状态指示(如设备运行、故障报警),需宽温、调光及保护;
  2. 消费电子显示:小型LED矩阵(如键盘背光、小尺寸信息屏),需均匀亮度与无闪烁调光;
  3. 智能家居设备:智能开关、传感器的LED指示灯,需低功耗(2.7V供电)与稳定调光;
  4. 医疗设备:状态指示面板(如监护仪、分析仪),需高可靠性与宽温适应性;
  5. 车载辅助显示:车载小尺寸LED指示(如仪表盘辅助灯),宽温特性适配车载环境需求。

综上,PCA9957HNMP通过集成化设计、精准调光、多重保护及小封装优势,为多通道LED驱动提供了高效、可靠的解决方案,是工业、消费电子等领域的实用型器件。

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