This document outlines the procedures required to convert a TSP7H4001QEVM-CVAL, a 4-channel quadrature phase buck converter evaluation module, into a 1-channel buck converter EVM.
All other trademarks are the property of their respective owners.
The TPS7H4001-SP is a radiation-hardness-assured, 7-V, 18-A synchronous buck converter. Operation of the device is demonstrated on the TPS7H4001EVM-CVAL evaluation module, which contains a single buck converter capable of supplying 18-A of load current. A key feature of the TPS7H4001-SP is that it supports parallel operation easily allowing four buck converters to operate in quadrature phase and deliver up to 72-A of load current to a tightly regulated line. Parallel operation is demonstrated on the TPS7H4001QEVM-CVAL evaluation module.
As different applications call for unique load current requirements even within a single system, users may wish to evaluate these different applications with the same hardware, avoiding multiple hardware purchases. This document provides instructions on how to do just that; specifically, listing the modifications required on the 4-Channel EVM in order to realize a 1-channel design. Note, this application report is part of a series of reports showing how to convert 4-channel to 1-channel, 4-channel to 2-channel, and 4-channel to 3-channel designs. Please refer to other documents if 2-channel or 3-channel designs are desired.
The following steps must be taken to ensure proper operation of a 1-channel buck converter on a populated 4-channel EVM (TPS7H4001QEVM-CVAL). A summary of all changes is provided in Table 1.
Position on PCB | Component Designator | Action |
MASTER DUT U1 | R21, R17, R12, R11, R14 | DNI |
R7 | Replace with 10kohms | |
C14 | Replace with 150pF | |
C15 | Replace with 10nF | |
SLAVE1 DUT U2 | R30 | DNI |
C35, C36, C38, C39, C40, C41, C42, C43 | DNI | |
C52, C53, C54, C55, C56, C57, C58, C60 | DNI | |
SLAVE 2 DUT U3 | R39 | DNI |
C63, C64, C66, C67, C68, C69, C70, C71 | DNI | |
C80, C81, C82, C83, C84, C85, C86, C88 | DNI | |
SLAVE3 DUT U4 | R55 | DNI |
C91, C92, C94, C95, C96, C97, C98, C99 | DNI | |
C108, C109, C110, C111, C112, C113, C114, C116 | DNI |