Transient Suppression DC Converter

1 Features of HSDF28D Series Transient Suppression DC DC Converters
High reliability                                         
Wide input voltage range: 15V～50V, Typical
DC input voltage: 28V
Surge protection 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)
                     50.8×28.44×8.40mm3 (with flange)
No output overshoot Weight：31g(without flange)
                   34g (with flange)
Inhibit function Table 1 Device models
Input under-voltage locked function
and output short circuit protection HSDF28D5, HSDF28D5F
Maximum power density: 38Win3 HSDF28D12, HSDF28D12F
Hermetically sealed metal case HSDF28D15, HSDF28D15F
2 Scope of application of HSDF28D Series Transient Suppression DC DC Converters
High-reliability electronic system for aviation and aerospace, etc
3 Descriptions of HSDF28D Series Transient Suppression DC DC Converters
This series device is high reliable and is featured with surge protection (80v, 1s) for DCDC converter. Single ended flyback, pulse width modulated and transformer magnetic feedback topology design are 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 HSDF28D Series of converters with high reliability and optimum miniaturization. The design and manufacturing process of HSDF28D series converters are in compliance with MIL-PRF-38534 and detailed specifications