HSTR28D Series Transient Suppression DC/ DC Converters

1 Features of HSTR28D Series Transient Suppression DC/ DC Converters

High reliability
Wide input voltage range：15V～50V，Nominal DC input voltage: 28V
Surge protection voltage：80V，1s
Output Power PO：40W
Operating temperature range Tc：-55℃～+125℃	Dimensions: 54.40×29.00×10.66mm(without flange)
Low Startup current	Dimensions:74.00×29.00×10.66mm (with flange)
No output overshoot	Weight：47g(without flange) 55g (with flange)
Inhibit function	Table1 Device models
Input under-voltage locked function and output short circuit protection	HSTR28D5、HSTR28D5F
Maximum power density：41W/in3	HSTR28D12、HSTR28D12F
Hermetically sealed metal case	HSTR28D15、HSTR28D15F

2 Scope ofdc dc converter applications

High reliability electronic system for aviation and aerospace, etc

3 Descriptions of HSTR28D Series Transient Suppression DC/ DC Converters

This series device is highly reliable and is featured with surge protection (80v, 1s) for DC/DC converter. Single ended, pulse width modulated and transformer magnetic feedback topology design is used in this device. The operating principle is that the sampling signal of output voltage, coupled by the opto-coupler, works together with the sampling signal of input loop current to regulate the pulse width of the controller. The double loop control creates constant voltage output and short circuit protection.

Thick film hybrid techniques provide the HTR 28 Series of converters with high reliability and optimum miniaturization. The design and manufacturing process of HTR 28 Series of converters are in compliance with MIL-PRF-38534 and detailed specifications.