Test Report
Interleaved and Multiphase Inverting Buck-Boost Converter Reference Design
Description
This reference design uses the UCD3138064A device as a digital controller to control inverting buck-boost. The design is capable of supporting two-phase peak current mode control or three-phase voltage mode control. The soft-switching technology is used in this design to improve the power efficiency. The input voltage is from –36 V to –62 V. The output voltage is adjustable from 28 V to 52 V. The default output voltage is 48 V and the maximum current is 14 A in two-phase peak current mode control or 21 A in three-phase voltage mode control.
Features
- High efficiency above 97.1%
- Interleaved two-phase peak current mode (PCM) control or three-phase with voltage mode control
- Zero voltage switching of MOSFETs
- Prebias start-up
- Current balancing between phases
- GUI-configurable to design a power supply based on requirements
Applications
Top Side
Bottom Side1 System Specification
1.1 Input Characteristic
Table 1-1 details the input characteristics.
Table 1-1 Input Characteristics
| Parameter | Symbols | Conditions | MIN | TYP | MAX | Units |
|---|---|---|---|---|---|---|
| Input Voltage Range | VIN | Normal Operating | –62 |
–36 |
V | |
| Minimum Input Voltage | VIN minimum | Continuous | –65 | V | ||
| Input Current | IIN | VIN = 36 V; VOUT = 48 V; IOmax = 21 A |
29 | A | ||
| VOUT = 48 V; VIN = 48 V; No Load |
0.23 | A | ||||
| Undervoltage Lockout | VOFF | VIN Decreasing | –34 | V | ||
| VON | VIN Increasing | –36 | V |
