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TI公司的ucc21225A是隔離雙路柵極驅動器，具有源電流4A和沉峰值電流6A，封裝為5-mm x 5-mm LGA-13.可以驅動高達5MHz的功率晶體管，具有業(yè)界最低的時延和脈寬失真。典型的傳輸時延為19ns，最大時延匹配為5ns，脈寬失真最大為6ns.兩個次級邊驅動器間內部功能隔離允許工作電壓高達700V，可配置成兩個低邊，兩個高邊，或有可編死區(qū)時間（DT）的半橋驅動器，器件的VDD電源電壓高達25V，寬輸入VCCI范圍從3V到18V，使得驅動非常適合于模擬和數(shù)字控制器間的接口，所有的電源引腳有欠壓鎖住（UVLO）保護。相關的安全規(guī)范包括3535-VPK Isolation per DIN V VDE V 0884-11:2017-01和2500-VRMS Isolation for 1 Minute per UL 1577.主要用在服務器，通信，IT和工業(yè)領域，DC/DC 轉換器和AC/DC轉換器，馬達驅動和DC/AC太陽能逆變器以及HEV和BEV電池充電器。本文介紹了UCC21225A主要特性，框圖和功能框圖，典型應用電路圖以及10kW三級三相連接電網(wǎng)的太陽能逆變器參考設計TIDA-0160610-kW主要特性和指標，框圖，電路圖和材料清單。

The UCC21225A is an isolated dual-channel gatedriver with 4-A source and 6-A sink peak current in a5-mm x 5-mm LGA-13 package. It is designed todrive power transistors up to 5-MHz with best-in-classpropagation delay and pulse-width distortion.

The input side is isolated from the two output driversby a 2.5-kVRMS isolation barrier， with 100-V/nsminimum common-mode transient immunity （CMTI）。

Internal functional isolation between the twosecondary side drivers allows working voltage up to700-VDC.This driver can be configured as two low-side， twohigh-side， or a half-bridge driver with programmabledead time （DT）。 A disable pin shuts down bothoutputs simultaneously when it is set high， and allowsnormal operation when left open or grounded.

The device accepts VDD supply voltages up to 25-V.A wide input VCCI range from 3-V to 18-V makes thedriver suitable for interfacing with both analog anddigital controllers. All the supply voltage pins haveunder voltage lock-out （UVLO） protection.

With all these advanced features， the UCC21225Aenables high power density， high efficiency， androbustness in a wide variety of power applications.

UCC21225A主要特性：

1? Universal： Dual Low-Side， Dual High-Side or Half-Bridge Driver

? 5 x 5 mm， Space-Saving LGA-13 Package

? Switching Parameters：

– 19-ns Typical Propagation Delay

– 5-ns Maximum Delay Matching

– 6-ns Maximum Pulse-Width Distortion

? CMTI Greater than 100-V/ns

? 4-A Peak Source， 6-A Peak Sink Output

? TTL and CMOS Compatible Inputs

? 3-V to 18-V Input VCCI Range

? Up to 25-V VDD with 5-V UVLO

? Programmable Overlap and Dead Time

? Rejects Input Transients Shorter than 5-ns

? Fast Disable for Power Sequencing

? Safety-Related Certifications：

– 3535-VPK Isolation per DIN V VDE V 0884-11:2017-01

– 2500-VRMS Isolation for 1 Minute per UL 1577

– CQC per GB4943.1-2011 （Planned）

UCC21225A應用：

? Server， Telecom， IT and Industrial Infrastructures

? DC-DC and AC-to-DC Power Supplies

? Motor Drive and DC-to-AC Solar Inverters

? HEV and BEV Battery Chargers

圖1. UCC21225A框圖

圖2. UCC21225A功能框圖

圖3. UCC21225A典型應用電路圖

10kW三級三相連接電網(wǎng)太陽能逆變器的參考設計TIDA-0160610-kW

This reference design provides an overview on how toimplement a three-level， three-phase， SiC-basedDC/AC grid-tie inverter stage. A higher switchingfrequency of 50 kHz reduces the size of magnetics forthe filter design and as a result a higher power density.SiC MOSFETs with switching loss ensures higher DCbus voltages of up to 1000 V and lower switchinglosses with a peak efficiency of 99%. This design isconfigurable to work as a two-level or three-levelinverter.

參考設計TIDA-0160610-kW主要特性：

? Rated Nominal and Max Input Voltage at 800-Vand 1000-V DC

? Max 10-kW/10-kVA Output Power at 400-V AC50- or 60-Hz Grid-Tie Connection

? Operating Power Factor Range From 0.7 Lag to0.7 Lead

? High-Voltage （1200-V） SiC MOSFET-Based Full-Bridge Inverter for Peak Efficiency of 98.5%

? Compact Output Filter by Switching Inverter at50 kHz

? 《2% Output Current THD at Full Load

?Isolated Driver ISO5852S With Reinforced Isolationfor Driving High-Voltage SiC MOSFET andUCC5320S for Driving Middle Si IGBT

? Isolated Current Sensing Using AMC1301 for LoadCurrent Monitoring

? TMS320F28379D Control Card for Digital Control

參考設計TIDA-0160610-kW應用：

? Solar String Inverters