• VQB75- Single Output Brick DC-DC Converter Features ·50-75W isolated output ·Efficiency to 90% ·300KHz switching frequency ·2:1 input range ·Regulated outputs ·Continuous short circuit protection ·Industry standard half-brick package ·Open frame type option Input Input Voltage Range 24V 18-36V 48V 36-75V 24 Vin power up 17V power down 15.5V 48Vin power up 34V power down 32.5V Under Voltage Lockout Positive Logic Remote ON/OFF Input Filter (see note 4&5) PI Type Output Voltage Accuracy Transient Response: 75%-100% Step Load Change Error Band Recover Time External Trim Adj. Range Ripple & Noise 20MHz BW, 2.5V, 3.3V, 5V Temperature Coefficient Short Circuit Protection Line Regulation 1 Load Regulation 2 Over Voltage Protection trip Range, % Vo nom. Current Limit ±1% max. ±5% <500us ±10% 40mV RMS., max 100mV pk-pk., max ±0.03%/°C Continuous ±0.2% max ±0.2% max 115-140% 110-140% Nominal Output General Specifications Efficiency Isolation Voltage Input/Output Input/Case Output/Case Isolation Resistance see table 1500VDC min. 1500VDC min. 1500VDC min. 10 7 Ohm min. Switching Frequency 300KHz, Type Operating Case Temperature -40°C to +100°C Storage Temperature -40°C to +105°C Thermal Shutdown, Case Temp. 100°C Typ. Dimensions 1.45x2.28x0.50 inches Case Material aluminum baseplate with plastic case (36.8x57.9x12.7mm) V-Infinity, LLC, 9615 SW Allen Blvd Suite 103, Beaverton, OR 97005 www.v-infinity.com 1-866-372-1258 • VQB75- Single Output Brick DC-DC Converter NOTES: 1. Measured from high line to low line 2. Measured from full load to zero load 3. Logic compatibility...open collector ref to -input Module ON...open circuit Module OFF...<0.8Vdc 4. Suffix “O” to the model number with open frame type Model Number VQB75-D24-S1-R8 VQB75-D24-S2R5 VQB75-D24-S3R3 Input Voltage 18-36VDC 18-36VDC 18-36VDC Output Voltage 1.8VDC 2.5VDC 3.3VDC Output Current 0.5-25A 0.5-25A 0.5-20A VQB75-D24-S5 VQB75-D48-S1R8 VQB75-D48-S2R5 VQB75-D48-S3R3 18-36VDC 36-75VDC 36-75VDC 36-75VDC 5VDC 1.8VDC 2.5VDC 3.3VDC 0.5-15A 0.5-25A 0.5-25A 0.5-20A I nput Current No Load Full Load 60mA 2259mA 60mA 3064mA 70mA 3125mA 80mA 50mA 50mA 50mA 3472mA 1116mA 1514mA 1563mA Effic. 83% 85% 88% Case QB QB QB 90% 84% 86% 88% QB QB QB QB Case HB Pin Connection Pin 1. 2. 3. 4. 5. 6. 7. 8. V-Infinity, LLC, 9615 SW Allen Blvd Suite 103, Beaverton, OR 97005 www.v-infinity.com Function Vin ON/OFF Case -Vout -Sense Trim +Sense +Vout 1-866-372-1258 • VQB75- Single Output Brick DC-DC Converter Application Notes Derating: The operating case temperature range of the VQB75 series is -40°C to +100°C. When operating the VQB75, proper derating or cooling is needed. Following is the derating curve of VQB75 without heat sink. Where: The power dissapation (Pd) is Pd= Pi - Po = Po (1- n )/ n The thermal resistances are listed below. The temperature rise (D T): D T = Pd * Rca Remote ON/OFF Control The VQB75 series allows the user to switch the module on and off electronically with the remote on/off feature. The VQB75 series is available with “positive logic” or “negative logic” options. V-Infinity, LLC, 9615 SW Allen Blvd Suite 103, Beaverton, OR 97005 www.v-infinity.com 1-866-372-1258 • VQB75- Single Output Brick DC-DC Converter External Output Trimming Output may optionally be externally trimmed (±10%) with a fixed resistor or an external trimpot as shown. Output Noise The output noise is measured with a 10µF tantalum capacitor and a 1.0µF ceramic capacitor across the output. V-Infinity, LLC, 9615 SW Allen Blvd Suite 103, Beaverton, OR 97005 www.v-infinity.com 1-866-372-1258