Inverting buck-boost reference design
PMP20587
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Key Document
Description
This reference design uses UCD3138064A as a digital controller to control two-phase two-rail inverting buck-boost. This non-isolated converter is used for wireless radio power. The input voltage is from -35 V to -60 V. There are two outputs. The default output voltage of rail 1 is 32 V and max current is 8.5 A; the default output voltage of rail 2 is 48 V and max current is 5.5 A. The output voltage is adjustable from 30 V to 56 V. With some component changes and firmware changes, the hardware can be used for current mode control or transition mode control to increase power and improve load transient. Test results of three controls are provided respectively.
Features
- Inverting buck boost for -48-V to 48-V system
- Transient response with less than +/- 3% overshoot/undershoot voltage
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Schematic/Block Diagram
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Design Guide
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TI Devices (8)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| LM5161 |
Wide Input 4.5-V to 100-V, 1-A Synchronous Buck / Fly-Buck Converter |
Offline & isolated DC/DC controllers & converters |
Sample & Buy |
View Design Kits & Evaluation Modules |
| LM60 |
±2°C analog output temperature sensor with 6.25mV /°C gain and TO-92 option |
Temperature sensors |
Sample & Buy |
Not Available |
| LMV393-N |
Dual General Purpose, Low Voltage, Tiny Pack Comparator |
Amplifiers |
Sample & Buy |
Not Available |
| LP2985-N |
150-mA, 16-V, low-dropout voltage regulator with enable |
Power management |
Sample & Buy |
View Design Kits & Evaluation Modules |
| OPA344 |
Single 1MHz, single-supply, rail-to-rail operational amplifiers MicroAmplifier™ series |
Operational amplifiers (op amps) |
Sample & Buy |
View Design Kits & Evaluation Modules |
| OPA365 |
2.2V, 50MHz, Low-Noise, Single-Supply Rail-to-Rail Operational Amplifier |
Operational amplifiers (op amps) |
Sample & Buy |
View Design Kits & Evaluation Modules |
| UCC21225A |
4-A/6-A, 2.5-kVRMS dual-channel isolated gate driver with 5-V UVLO, dual input, LGA package |
Gate drivers |
Sample & Buy |
View Design Kits & Evaluation Modules |
| UCD3138064A |
Highly Integrated Digital Controller for Isolated Power |
Digital power ICs |
Sample & Buy |
View Design Kits & Evaluation Modules |
CAD/CAE symbols
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Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1: Download and install the free download.
Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
Step 3: Open the .bxl file with the Ultra Librarian software.
You can always access the complete CAD/CAE Symbols database at https://webench.ti.com/cad/
Both PCB footprints and schematic symbols are available for download in a vendor neutral format, which can then be exported to the leading EDA CAD/CAE design tools using the Ultra Librarian Reader. The reader is available as a (free download.).
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Technical documentation
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User guide (1)
| Title | Type | Size (KB) | Date |
| | PDF | 7524 |
21 Jul 2020
|
Design files (6)
| | ZIP | 2969 |
21 Jul 2020
|
| | ZIP | 2284 |
21 Jul 2020
|
| | PDF | 3921 |
21 Jul 2020
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| | PDF | 628 |
21 Jul 2020
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| | PDF | 320 |
21 Jul 2020
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| | PDF | 728 |
21 Jul 2020
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