HSDF28S Series Transient Suppression DC/ DC Converters

1 Features of HSDF28S Series Transient Suppression DC/ DC Converters

High reliability
Wide input voltage range:15V～50V, Typical DC input voltage: 28V
Maximum input transient voltage：80V,1s
Output Power PO：20W
Operating temperature range Tc：-55℃～+125℃
Low Startup current	Dimensions: 36.83×28.44×8.40mm3(without flange) 50.80×28.44×8.40mm3 (with flang)
No output overshoot	Weight：31g(without flange) 34g (with flange)
Inhibit function	Table 1 Product models
Input under-voltage locked function and output short circuit protection	HSDF28S5, HSDF28S5F
Maximum power density：38W/in3	HSDF28S12, HSDF28S12F
Hermetically sealed metal case	HSDF28S15, HSDF28S15F

2 Scope of application of HSDF28S Series Transient Suppression DC/ DC Converters

High-reliability electronic system for aviation and aerospace, etc

3 Descriptions of HSDF28S Series Transient Suppression DC/ DC Converters

This series product is high reliable and is featured with transient protection (80v, 1s) for DC/DC converter. Single ended flyback, pulse width modulated and transformer magnetic feedback topology design are used in this product. 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 provides the HSDF28S Seriesthick film DC DC Converterwith high reliability and optimum miniaturization. The design and manufacturing process of HSDF28S Series converters are in compliance with MIL-PRF-38534 and detailed specifications

1 Features of HSDF28S Series Transient Suppression DC/ DC Converters

High reliability
Wide input voltage range:15V～50V, Typical DC input voltage: 28V
Maximum input transient voltage：80V,1s
Output Power PO：20W
Operating temperature range Tc：-55℃～+125℃
Low Startup current	Dimensions: 36.83×28.44×8.40mm3(without flange) 50.80×28.44×8.40mm3 (with flang)
No output overshoot	Weight：31g(without flange) 34g (with flange)
Inhibit function	Table 1 Product models
Input under-voltage locked function and output short circuit protection	HSDF28S5, HSDF28S5F
Maximum power density：38W/in3	HSDF28S12, HSDF28S12F
Hermetically sealed metal case	HSDF28S15, HSDF28S15F

2 Scope of application of HSDF28S Series Transient Suppression DC/ DC Converters

High-reliability electronic system for aviation and aerospace, etc

3 Descriptions of HSDF28S Series Transient Suppression DC/ DC Converters

This series product is high reliable and is featured with transient protection (80v, 1s) for DC/DC converter. Single ended flyback, pulse width modulated and transformer magnetic feedback topology design are used in this product. 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 provides the HSDF28S Seriesthick film DC DC Converterwith high reliability and optimum miniaturization. The design and manufacturing process of HSDF28S Series converters are in compliance with MIL-PRF-38534 and detailed specifications