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ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input +12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
0RXU-75TD10
* * * * * * Isolated Fixed Frequency (300 kHz) High Efficiency High Power Density Input Under- Voltage Lockout (UVLO) UL60950 Recognized (UL/cUL) and CE Mark
RoHS Compliant
* * * * * * Low Cost SCP/OCP Remote On/Off Output Voltage Trim Output Over-Voltage Protection (OVP) Over Temperature Protection
Description
The 0RXU-75TD10 is an isolated dc/dc converter that operates from a nominal 48 Vdc source. It provides up to 78 W of output power with two output voltages. Features include remote on/off, output adjust, short circuit protection, over current protection, over-temperature shutdown, output over voltage protection, and input under voltage lockout. This converter is provided in a compact, though-hole package that is easy to use and provides good thermal performance.
Part Selection
Output Voltage +12 Vdc/-12 Vdc Input Voltage 36 Vdc - 75 Vdc Max. Output Current 5 A/1.5 A Max. Output Power 78 W Typical Efficiency 90% Model Number 0RXU-75TD10
Note: Add "G" suffix at the end of the model number listed above to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter Input Voltage Remote On/Off Ambient Temperature Storage Temperature Min -0.3 V -0.3 V -40 C -40 C Typ Max 100 V 30 V 85 C 125 C Notes 100 V for 10 mS Max.
Input Specifications
Parameter Input Voltage Input Current (no load) Input Current (full load) Remote Off Input Current Input Reflected Ripple Current (rms) Input Reflected Ripple Current (pk-pk) Turn On Voltage Threshold Turn Off Voltage Threshold Min 36 V 32 V 30 V Typ 10 mA 10 mA 50 mA 34 V 31 V Max 75 V 200 mA 3A 20 mA 30 mA 100 mA 35 V 33 V With simulated source impedance of 10 uH, 5 Hz to 20 MHz; use a 100 uF/100 V electrolytic capacitor with ESR=1 ohm max at 200k Hz Notes
Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input +12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
Output Specifications
Parameter Output Voltage Set Point VO1=+12 V VO2=-12 V Load Regulation VO1=+12 V VO2=-12 V Line Regulation VO1=+12 V VO2=-12 V Regulation Over Temperature Output Current VO1=+12 V VO2=-12 V Output Current Limit VO1=+12 V VO2=-12 V Short Circuit Protection Startup Time Power Up Remote On/Off Overshoot at Turn On Ripple and Noise (rms) VO1=+12 V VO2=-12 V Ripple and Noise (pk-pk) VO1=+12 V VO2=-12 V Output Capacitance Transient Response 50% ~ 75% Max Load Overshoot Settling Time VO1=+12 V 75% ~ 50% Max Load Overshoot Settling Time Overshoot Settling Time VO2=-12 V 75% ~ 50% Max Load Overshoot Settling Time 300 mV 150 uS 300 mV 150 uS 300 mV 150 uS 300 mV 150 uS 600 mV 300 uS 600 mV 300 uS 600 mV 300 uS 600 mV 300 uS Test conditions: di/dt=0.5 A/us, Vin=48 V 0 uF 75 mV 40 mV 150 mV 150 mV 1,000 uF 25 mV 10 mV 50 mV 50 mV Test conditions: 0-20 MHz Bandwidth, with a 1 uF ceramic capacitor at the output. 10 mS 7 mS 20 mS 20 mS 5% 6A 1.8 A 7.5 A 2.25 A Hiccup Mode Hiccup Mode 0.06 A 0.06 A 5A 1.5 A 1% VO 1% VO 0.02% /C Io1=50% Imax1; Io2=50% Imax2 (-40 C to +85 C) 2% VO 4% VO Io1=50% Imax1; Io2=50% Imax2 Io2=50% Imax2; Io1=50% Imax1 Min +11.76 V -11.86 V Typ +12 V -12.1 V Max +12.24 V -12.34 V Notes Vin=48 V, lo=50% load
For both VO1 and VO2
50% ~ 75% Max Load
Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input +12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
General Specifications
Parameter Efficiency Switching Frequency I/O Isolation Voltage Isolation Capacitance Output Trim Range Output Over Voltage Protection VO1=+12 V VO2=-12 V Over-temperature MTBF Dimensions Inches (L x W x H) Millimeters (L x W x H) Weight 2.28 x 2.4 x 0.48 57.9 x 61.0 x 12.09 45 g Min 84% 270k Hz 90% +13.5 V -13.5 V Typ 90% 300k Hz 1500 V 1500 pF +15 V -15 V 130 C 2,366,749 hours Max 330k Hz 110% +17 V -17 V Hiccup Mode Hiccup Mode Calculated Per Bell Core SR-332 (IO = 80% Imax; TA = 25 C) Notes Vin = 48 V; Full Load
-
Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
Control Specifications
Parameter Remote On/Off Signal Low (Unit On) Signal High (Unit Off) Min -0.3 V 3.5 V Typ Max 1.8 V 12 V Notes
Active Low; Remote On/Off pin open, Unit off.
Output Trim Equations
Equations for calculating the trim resistor (in k) given the desired adjusted voltage (Vadj) and the nominal output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between the Trim pin and Vo1. The Trim Up resistor should be connected between the Trim pin and COM. Only one of the resistors should be used for any given application.
Rtrim _ down =
99.86 - 20.5 Vnom - Vadj
Vout1
Rtrim_down
Module
Trim
COM
Rtrim _ up =
26.25 - 10 Vadj - Vnom
Vout1
Module Trim
Rtrim_up
Note: Output voltage Vo=12.012 V
COM
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input +12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
Efficiency Data
0RXU-75TD10 module
0.950 0.900 0.850 Efficiency 0.800 0.750 0.700 0.650 0.600 10%load 25%load 50%load Output Current 75%load 100%load Vin=36V Vin=48V Vin=75V
Thermal Derating Curve (Vin=48 V)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input +12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
Ripple and Noise Waveforms
Ripple and noise at full load, 36 V input, ch1 (+)12 V/5 A output, (-)12 V/1.5 A
Ripple and noise at full load, 48 V input, ch1 (+)12 V/5 A output, (-)12 V/1.5 A
Ripple and noise at full load, 75 V input, ch1 (+)12 V/5 A output, (-)12 V/1.5 A Note: With a 1uF ceramic capacitor at the output, Ta=25 deg C.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input +12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
Transient Response Waveforms
Vout=(+)12 V 50%-75% Load Transients at Vin=36 V
Vout=(+12) V 75%-50% Load Transients at Vin=36 V
Vout=(-)12 V 50% - 75% Load Transients at Vin=36 V
Vout=(-)12 V 75% -50% Load Transients at Vin=36 V
Vout=(+)12 V 50%-75% Load Transients at Vin=48 V
Vout=(+12) V 75%-50% Load Transients at Vin=48 V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input +12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
Transient Response Waveforms (continued)
Vout=(-)12 V 50% - 75% Load Transients at Vin=48 V
Vout=(-)12 V 75% -50% Load Transients at Vin=48 V
Vout=(+)12 V 50%-75% Load Transients at Vin=75 V
Vout=(+12) V 75%-50% Load Transients at Vin=75 V
Vout=(-)12 V 50% - 75% Load Transients at Vin=75 V
Vout=(-)12 V 75% -50% Load Transients at Vin=75 V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input +12 Vdc/5 A, -12 Vdc/1.5 A Dual Outputs
Mechanical Outline
Pin Connections
Pin 1 2 3 4 5 Function -Vin FG REM +Vin +Vo1 (+12 V) Pin 6 7 8 9 10 Function COM Trim COM -Vo1 (-12 V) No Connection
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products.
(c)2006 Bel Fuse Inc. Specifications subject to change without notice. 032806
CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
FAR EAST Bel Fuse Ltd. 8F/ 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com
EUROPE Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com

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