Avago ACPL-M71T 高速低功耗光学隔离方案

Avago公司的 ACPL-M71T和 ACPL-M72T是高速低功耗符合AEC-Q100 Grade 1资质的数字光学隔离器,工作温度从–40℃ 到125℃.ACPL-M71T采用高速LED, 最大延迟(IF =10 mA)35ns,ACPL-M72T采用低电流LED,4 mA LED驱动电流.主要应用在汽车CANBus通信接口,IGBT和功率MOSFET绝缘高速栅极驱动器,MCU接口,ADC和DAC数字绝缘.本文介绍ACPL-M71T和 ACPL-M72T主要特性, 功能方框图, ACPL-M71T高速模式和CMH,CML测试电路图,以及ACPL- M72T低功耗模式开关, 高CMR,CMH测试电路图, ACPL- M71T高速应用电路图与ACPL- M72T低功耗应用电路图.

High Speed/Low Power R2CouplerTM Digital Optocouplers with AEC-Q100 Grade 1 Qualification The Avago ACPL-M71T and ACPL-M72T are high temperature, digital CMOS optocouplers in SOIC-5 packages. Suitable for hybrid and electric vehicle applications,the optocouplers use the latest CMOS IC technology to achieve outstanding performance and very low power consumption. All devices are AEC-Q100 compliant and operate over the –40℃ to 125℃ temperature range.

The ACPL-M71T uses a high speed LED, and the ACPL-M72T uses a low current LED for lower power dissipation. The high speed ACPL-M71T featuring a 35 ns maximum propagation delay (IF =10 mA). The ACPL-M72T optocoupler features very low power. With a low 4 mA LED drive current, ACPL-M72L typical propagation delay is 60 ns.

Each digital optocoupler has a CMOS detector IC, an integrated photodiode, a high speed transimpedance amplifier, and a voltage comparator with an output driver.

All Avago R2Coupler optocouplers feature reinforced insulation and reliability that delivers safe signal isolation in critical automotive and high temperature industrial applications.

ACPL-M71T /M72T主要特性:

5 V CMOS compatible

Common-Mode Rejection 40kV/_s @ VCM=1000V:

Wide automotive temperature range: –40℃ to 125℃

Low propagation delay :

High Speed ACPL-M71T: 26ns @ IF = 10 mA (Typical)

Low Power ACPL-M72T: 60ns @ IF = 4 mA (Typical)

Worldwide safety approval (pending):

UL 1577 recognized, 3750 Vrms / 1 min

CSA approved

IEC/EN/DIN EN 60747-5-5

Qualified to AEC-Q100 Grade 1 test guidelines

ACPL-M71T /M72T应用:

Automotive CANBus communications interface

Automotive isolated high speed gate drivers for IGBTs and Power MOSFETs

High temperature digital signal isolation

Microcontroller interface

Digital isolation for A/D and D/A conversion


图1.ACPL-M71T /M72T功能方框图

图2.ACPL-M71T高速模式测试电路图

图3.ACPL-M71T高速模式CMH测试电路图

图4.ACPL-M71T高速模式CML测试电路图

图5.ACPL- M72T低功耗模式开关测试电路图

图6.ACPL- M72T低功耗模式高CMR,CMH测试电路图

图7.ACPL- M72T低功耗模式高CMR,CML测试电路图

图8. 推荐的ACPL- M71T高速应用电路图


图9.推荐的ACPL- M72T低功耗应用电路图