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Texas Instruments UCC21520/UCC27211A | Demoboard TIDA-00951
2kW, 48V to 400V, >93% Efficiency, Isolated Bidirectional DC-DC Converter Reference Design for UPS
Overview
| Topology | Full-Bridge Converter symmetrical isolated |
| Input voltage | 300-400 V |
| Switching frequency | 100 kHz |
| Output 1 | 60 V / 50 A |
| IC revision | E2 |
Description
The 2-kW isolated bidirectional DC-DC converter reference design (TIDA-00951) is capable of power transfer between a 400-V DC-BUS and a 12-14 cell lithium battery pack for use in UPS, battery backup and power storage applications. This reference design works as active clamped boost converter with ZVS in the backup mode, transferring power from the 48V battery to the 400V DC-BUS. Operating as a voltage fed full-bridge battery charger, this reference design enables you to achieve >93% efficiency when charging a 48V battery from the 400V DC BUS. This reference design also has built-in protection for DC BUS and battery overcurrent as well as overvoltage protection.
Features
- Digitally controlled isolated bidirectional DC/DC converter
- Operates as active clamp full bridge boost converter with ZCS turn on along with ZVS at high load for the low-voltage FET and ZVS for high-voltage switches
- Wide operating range from 36- to 60-V battery and 300- to 400-V DC bus
- Cost optimized design using 100-V FET on low-voltage side, eliminates need for paralleling multiple FETs up to 2kW
- Fast mode transfer from battery charging to back-up mode in less than 100uS
- Uses the TMS320F28033 digital controller present on the TIDA-01281 reference design for controlling the working
- High side current sensing for monitoring the battery current based on the INA240 on-board the TIDA-01141 reference design
- Uses the reinforced isolated gate-driver UCC21520 present in the TIDA-01159 design for driving the high voltage full-bridge
Typical applications
- Server PSUs and Telecom Rectifiers, Uninterruptible Power Supplies (UPS), Industrial Power Supplies, Battery Chargers, Energy Storage Systems
- UPS, battery backup and power storage
More information
Products
Order Code | Datasheet | Downloads | Status | Product series | VIN | VOut1(V (DC)) | IOut1(A) | Type of Insulation | fswitch(kHz) | ∫Udt(Vµs) | NPRI : NSEC | L(µH) | ISAT(A) | VT(V (RMS)) | L(mm) | Mount | W(mm) | H(mm) | IR(A) | Ti | Tl(mm) | Pins | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PPTI Push-Pull Transformers, 5 V (DC), 12.5 V (DC) | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PPTI Push-Pull Transformers | Input Voltage 5 V (DC) | Output Voltage 112.5 V (DC) | Output Current 10.35 A | Type of InsulationReinforced | Switching Frequency 400 - 700 | Voltage-µSecond7.8 Vµs | Turns Ratio1:2.6 | Inductance152 µH | – | Insulation Test Voltage5000 V (RMS) | Length9.14 mm | MountSMT | Width12.7 mm | Height7.62 mm | – | – | – | – | |||
 | 750343382 | Transformer, 36 - 60 V (DC), 300 V (DC) | Downloads5 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Transformer | Input Voltage 36 - 60 V (DC) | Output Voltage 1300 V (DC) | Output Current 15 A | – | Switching Frequency 100 | – | – | Inductance45 µH | – | Insulation Test Voltage1875 V (RMS) | Length55 mm | MountTHT | Width57 mm | Height40.1 mm | – | – | – | – | |
 | WP-BUCF REDCUBE PRESS-FIT with internal thread, circumference, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | – | – | – | – | – | – | – | – | – | – | – | MountPress-Fit | Width9 mm | Height6 mm | Rated Current175 A | Inner ThreadM4 | Thread Length6 mm | Pins12 | ||||
 | 750343383 | Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Inductor | – | – | – | – | – | – | – | Inductance4.5 µH | Saturation Current70 A | Insulation Test Voltage1000 V (RMS) | Length43 mm | MountTHT | Width46 mm | Height47 mm | – | – | – | – |