ST STP16CPP05低电压16位恒流LED驱动方案

ST 公司的STP16CPP05是低电压16位恒流LED驱动器,包括有16位串进并出移位寄存器,输出级有16个可调整3-40mA恒流源,工作电压3.3V或5V,最大时钟频率30MHz.本文介绍STP16CPP05主要特性, 方框图, DC和AC特性测试电路,以及典型应用电路.

STP16CPP05: Low voltage 16-bit constant current LED sink driver

The STP16CPP05 is a monolithic, low voltage, low current power 16-bit shift register designed for LED panel displays. The STP16CPP05 contains a 16-bit serial-in, parallel-out shift register that feeds a 16-bit, D-type storage register. In the output stage, sixteen regulated current sources provide from 3 mA to 40 mA constant current to drive the LEDs.

The output current setup time is 40 ns (typ), thus improving the system performance.

The LEDsbrightness can be controlled by using an external resistor to adjust the STP16CPP05 output current.

The STP16CPP05 guarantees a 20 V output driving capability, allowing users to connect more LEDs in series.The high clock frequency, 30 MHz, makes the device suitable for high data rate transmission. The 3.3 V voltage supply is useful in applications that interface with a 3.3 V micro controller.

STP16CPP05主要特性:

■ 16 constant current output channels

■ Adjustable output current through external resistor

■ Output current: 3-40 mA

■ Serial data in/parallel data ouT

■ 3.3 V or 5 V supply voltage

■ Max clock frequency 30 MHz

■ Schmitt-trigger input

■ ESD protection 2 kV HBM

■ Thermal shutdown

图1.STP16CPP05方框图

图2.STP16CPP05 DC特性测试电路

图3.STP16CPP05 AC特性测试电路

图4.STP16CPP05 典型应用电路