Low thermal resistance for industrial applications

24th February 2020

Alex Lynn

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Texas Instruments (TI) has introduced a small low thermal resistance 36V, four amps power module in a quad flat no-lead (QFN) package. The TPSM53604 DC/DC buck module’s 5x5.5mm footprint enables engineers to shrink the size of their power supply by 30% while reducing power loss by 50% when compared to similar competing modules.

The new power module comes with a single thermal pad to optimise heat transfer, enabling engineers to simplify board mounting and layout.

The TPSM53604 can operate in ambient temperatures as high as 105°C to support rugged applications in factory automation and control, grid infrastructure, test and measurement, industrial transport, and aerospace and defence.

By pairing the TPSM53604 with a compact step-down module such as the TPSM82813 and TPSM82810, engineers can create a complete power solution from a 24V input down to the point of load, while minimising design time and effort.

Key benefits and features:

Shrink and simplify the power solution: Its total area of 85mm2 for a single-sided layout is the smallest solution for common 24V, four amps industrial applications. The standard QFN footprint helps simplify design and thereby reduce time to market.
Efficiently dissipate heat at high ambient temperatures: Forty-two percent of the TPSM53604’s QFN package footprint touches the board, enabling more efficient heat transfer compared to competing ball-grid-array (BGA) packages. In addition, the module’s buck converter integrates MOSFETs with low drain-source on resistance (RDS(on)) to enable conversion efficiency of 90% at 24V to five volts. Watch the video, ‘Enhancing power supply performance with the TPSM53604 power module’, for more details.
Easily meet EMI standards: The TPSM53604’s integrated high-frequency bypass capacitors and lack of bond wires help engineers meet the electromagnetic interference (EMI) standard defined by CISPR (Comité International Spécial des Perturbations Radioélectriques) 11 Class B limits.

The TPSM53604 is now available from TI and authorized distributors in a 5x5.5mm QFN package. Pricing starts at $3.65 in 1,000-unit quantities.

Production quantities of the TPSM53602 (two amps) and TPSM53603 (three amps) modules are also now available from TI and authorised distributors. Pricing starts at $2.64 and $3.21 in 1,000-unit quantities, respectively.