HSFM140 Series Transient Suppression DC/ DC Converters

1 Features of HSFM140 Series Transient Suppression DC/ DC Converters

High reliability
Maximum input transient voltage：80V/50ms or 8V/50ms
Output power PO：140W
Operating temperature range :Tc：-55℃～+125℃
Efficiency：95%	Size：36.83×28.44×8.40mm（Without flange） 50.80×28.44×8.40mm（With flange）
Match with DC/DC converter with Input voltage range of 16-40V	Weight：31g（Without flange） 34g（With flange)
Hermetically sealed metal cases

2 Scope of application of HSFM140 Series Transient Suppression DC/ DC Converters

High-reliability electronic system for aviation and aerospace, etc.

3 Description of HSFM140 Series Transient Suppression DC/ DC Converters

HSFM-140 surge protection front-end module is matched with DC/DC converter.

It is used to treat the Instantaneous input voltage（80V/50ms，8V/50ms），after processing , it provides a reliable input voltage for DC/DC converter. The module is made of thick-film hybrid integrated process, bare chip assembly and full metal case sealed package.

Two operating modes for HSFM-140 surge protection front-end module：

Normal operating mode：When the bus voltage at 16V~40V，the module output voltage follows the input voltage and lower than the input voltage of about △V, while the internal DC/DC converter charge the external capacitor.

Surge maintenance mode:：When the bus voltage reaches 80V/50ms or 8V/50ms,

The output part of the modules will be switched back .The external capacitor discharged to supply power for thehigh voltage dc dc converter