This user’s guide contains information for the TPSM843B22EVM evaluation module (BSR228) and the TPSM843B22 buck power module. This user's guide also includes the performance characteristics, schematic, and bill of materials for the TPSM843B22EVM.
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The TPSM843B22 module is a synchronous buck power module designed to provide up to a 20-A output. The input (VIN) is rated for 4 V to 18 V. Table 1-1 provides the rated input voltage and output current range for the evaluation module.
The high-side and low-side MOSFETs are incorporated inside the TPSM843B22 package along with the gate-drive circuitry, inductor and basic passives. The low drain-to-source on-resistance of the MOSFET allows the TPSM843B22 to achieve high efficiencies and helps keep the junction temperature low at the rated output current. Fixed frequency advanced current mode control allows you to synchronize the module to an external clock source. An external divider allows for an adjustable output voltage. The TPSM843B22 FSEL and MSEL pins provide selectable switching frequency, soft-start time, current limit, and internal compensation. Lastly, the TPSM843B22 includes an enable pin and a power-good output, which can be used for sequencing multiple modules.
EVM | INPUT VOLTAGE RANGE | OUTPUT CURRENT RANGE |
---|---|---|
TPSM843B22EVM | VIN = 4 V to 18 V | 0 A to 20 A |
The following warnings and cautions are noted for the safety of anyone using or working close to the TPSM843B22EVM. Observe all safety precautions.
![]() | Caution | The TPSM843B22EVM may become
hot during operation due to dissipation of power
in some operating conditions. Avoid contact with
the board. Follow all applicable safety procedures
applicable to your laboratory. Caution Hot surface. Contact may cause burns. Do not touch! |
The circuit module has signal traces, components, and component leads on the bottom of the board. This may result in exposed voltages, hot surfaces or sharp edges. Do not reach under the board during operation.
Some power supplies can be damaged by application of external voltages. If using more than one power supply, check your equipment requirements and use blocking diodes or other isolation techniques, as needed, to prevent damage to your equipment.