Holtek 公司的HT1632C是 32x8 和 24x16 LED驱动器，工作电压2.4V 到5.5V，集成了16级PWM亮度控制，256kHz RC振荡器，以及串行MCU接口。HT1632C主要应用在工业控制指示器，数字钟，计数器，热调节器，电压计以及仪表读出，LED显示器和其它消费类电子。本文介绍了HT1632C的主要特性，方框图以及低功率，中功率和大功率的应用电路。此外还借调了级联应用电路。
HT1632C 32x8 & 24x16 LED Driver
The HT1632C is a memory mapping LED display controller/ driver, which can select a number of ROW and commons. These are 32 ROW & 8 commons and 24 ROW & 16 commons. The device supports 16-gradation LEDs for each out line usingPWMcontrol with software instructions.
A serial interface is conveniently provided for the command mode and data mode. Only three or four lines are required for the interface between the host controller and the HT1632C. The display can be extended by cascading the HT1632C for wider applications.
HT1632C 主要特性：
Operating voltage: 2.4V~5.5V
Multiple LED display _ 32 ROW /8 COM and 24 ROW & 16 COM
Integrated display RAM _ select 32 ROW & 8 COM for 64_4 display RAM, or select 24 ROW & 16 COM for 96_4 display RAM
16-level PWM brightness control
Integrated 256kHz RC oscillator
Serial MCU interface _ CS, RD, WR, DATA
Data mode & command mode instruction
Cascading function for extended applications
Selectable NMOS open drain output driver and PMOS open drain output driver for commons
52-pin QFP package
HT1632C 应用：
Industrial control indicator
Digital clock, thermometer, counter, voltmeter
Instrumentation readouts
Other consumer application
LED Displays
图1。HT1632C方框图
应用电路
1．低功耗 LED 应用 (直接驱动)
2．中功率 LED 应用 (COM 带晶体管缓冲器)
3．大功率LED 应用(ROW 和 COM 带晶体管缓冲器)
4．级联应用
