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VHB75W Series Half Brick DC-DC Converter Rev. 07-2007
Features
*37.5W-75W isolated output *Efficiency to 85% *300KHz switching frequency *4:1 input range *Regulated outputs *Continuous short circuit protection *Industry standard half-brick package *Five-sided metal case
Model Number VHB75W-Q24-S3R3 VHB75W-Q24-S5 VHB75W-Q24-S12 VHB75W-Q24-S15 VHB75W-Q24-S24 VHB75W-Q48-S3R3 VHB75W-Q48-S5 VHB75W-Q48-S12 VHB75W-Q48-S15 VHB75W-Q48-S24
Input Voltage 9-36 VDC 9-36 VDC 9-36 VDC 9-36 VDC 9-36 VDC 18-75 VDC 18-75 VDC 18-75 VDC 18-75 VDC 18-75 VDC
Output Voltage 3.3 VDC 5 VDC 12 VDC 15 VDC 24 VDC 3.3 VDC 5 VDC 12 VDC 15 VDC 24 VDC
Output Current 15 A 15 A 6.25 A 5A 3.12 A 15 A 15 A 6.25 A 5A 3.12 A
I nput Current No Load Full Load 50 mA 2611 mA 50 mA 3811 mA 50 mA 3765 mA 50 mA 3720 mA 50 mA 3720 mA 50 mA 1320 mA 50 mA 1905 mA 50 mA 1860 mA 50 mA 1860 mA 50 mA 1860 mA
Efficiency 79% 82% 83% 84% 84% 78% 82% 84% 84% 84%
V-Infinity, LLC, 20050 SW 112th Ave., Tualatin, OR 97062
www.v-infinity.com
1-866-372-1258
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VHB75W Series Half Brick DC-DC Converter Rev. 07-2007
Input
Input Voltage Range Under Voltage Lockout 24V: 48V: 24V: 48Vin: ON/OFF Control Input Filter 9-36V 18-75V power up 8.8V power down 8V power up 17V power down 16V see notes 3&4 PI Type
Output
Voltage Accuracy Transient Response: 25% Step Load Change External Trim Adj. Range Ripple & Noise 3.3V, 5V 20MHz BW 12V & 15V 24V Temperature Coefficient Short Circuit Protection Safety Line Regulation 1 Load Regulation 2 Over Voltage Protection trip Range, % Vo nom. Current Limit 1% max. <500 sec. 10% 40mV RMS., max 100mV pk-pk., max 60mV RMS., max 150mV pk-pk., max 100mV RMS., max 240mV pk-pk, max. 0.03%/C Continuous approved to UL60950-1 (E222736) 0.2% max 0.2% max 115-140% 110%-160% Nominal Output
General Specifications
Efficiency Isolation Voltage Input/Output Input/Case Output/Case Isolation Resistance Switching Frequency Operating Case Temperature Storage Temperature Thermal Shutdown, Case Temp. Dimensions Case Material
NOTES: 1. Measured from high line to low line 2. Measured from full load to zero load 3. On/Off Control: Positive logic default. Referenced to -Vin. Open collector. Module ON...open circuit Module OFF...<0.8Vdc 4. For negative logic On/Off control, add suffix "N" to the model number
see table 1500VDC min. 1500VDC min. 1500VDC min. 10 7 Ohm min. 300KHz, Typ -40C to +100C -55C to +105C 100C Typ. 2.28x2.40x0.50 inches (57.9x61.0x12.7mm) aluminum
V-Infinity, LLC, 20050 SW 112th Ave., Tualatin, OR 97062
www.v-infinity.com
1-866-372-1258
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VHB75W Series Half Brick DC-DC Converter Rev. 07-2007
Application Notes
Derating: The operating case temperature range of the VHB75 series is -40C to +100C. When operating the VHB75, proper derating or cooling is needed. Following is the derating curve of VHB75 without heat sink.
Where: The power dissapation (Pd) is Pd= Pi - Po = Po (1- )/ The thermal resistances are listed below.
The temperature rise (D T): D T = Pd * Rca
V-Infinity, LLC, 20050 SW 112th Ave., Tualatin, OR 97062
www.v-infinity.com
1-866-372-1258
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VHB75W Series Half Brick DC-DC Converter Rev. 07-2007 Remote On/Off Control
The VHB75 series allows the user to switch the module on and off electronically with the remote on/off feature. Logic control defaults to "positive" logic. The diagram shows the recommentded curcuits for positive logic. The "negative logic" option is also available.
External Output Trimming
Output may optionally be trimmed (10%) with external fixed resistors or an external trimpot as shown.
Output Noise
The output noise is measured with a 10uF tantalum capacitor and a 1.0uF ceramic capacitor across the output.
V-Infinity, LLC, 20050 SW 112th Ave., Tualatin, OR 97062
www.v-infinity.com
1-866-372-1258

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