Texas Instruments TPSM846C23, Руководство пользователя

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Description
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2 SLVUB26C – May 2017 – Revised June 2018
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Operating TPSM846C23 in Parallel
1 Description
The TPSM846C23 is a PMBus™ enabled, synchronous buck power module designed to provide up to 35
A of output current. The TPSM846C23 can be paralleled with two devices to achieve output current up to
70 A. The TPSM846C23 is a highly-integrated, PMBus-enabled DC-DC power module that combines a
35-A DC/DC converter with power MOSFETs, a shielded inductor, some input and output capacitors, and
passives into a low profile package. The input voltage range is 4.5 V to 15 V. The output voltage range is
0.35 V to 2 V. The PMBus interface provides for converter configuration as well as monitoring of key
parameters including output voltage, output current, and the internal die temperature, as well as many
user-programmable configuration options.
This evaluation module is designed to demonstrate the ease-of-use and small printed-circuit-board area
that may be achieved when paralleling two TPSM846C23 power modules. Monitoring test points are
provided to allow measurement of efficiency, power dissipation, input ripple, output ripple, line and load
regulation, and transient response. Additionally, control test points are provided for use of the power good,
and synchronization features of the device. The EVM uses a recommended PCB layout that maximizes
thermal performance and minimizes output ripple and noise.
2 Getting Started
Figure 1 highlights the user interface items associated with the EVM. The polarized input power terminal
block (TB1) is used for connection to the host input supply. TB2 and TB3 allow 4 terminals for VOUT and
TB4 and TB5 allow 4 terminals for PGND for connection to the load. These terminal blocks can except up
to 12 AWG wire.
Figure 1. EVM User Interface
The VIN Monitor (VIN and PGND) and VOUT Monitor (VS+ and VS–) test points located near the input
terminal block and the output terminal blocks are intended to be used as voltage monitoring points where
voltmeters can be connected to measure the input and output voltages.
Do not use these VIN and VOUT
monitoring test points as the input supply or output load connection points. The PCB traces
connecting to these test points are not designed to support high currents.