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ISOLATED DC/DC CONVERTERS
48 V Input 3.3 V/50 A, 5.0 V/30 A Output
0RHB-C5T Series
* * * * * * * Isolated High Efficiency High Power Density Low Cost
RoHS Compliant
* * * * * *
PRELIMINARY
Output Over Voltage Shutdown OCP/SCP Over Temperature Protection Remote On/Off Output Voltage Trim Positive/Negative Remote Sense
Fixed Frequency (330 kHz) Input Under/Over Voltage Lockout UL60950 Recognized (UL/cUL)
Description
The 0RHB-C5T Series are isolated dc/dc converters that operate from a nominal 48 V source. This unit will provide up to 165 W of output power from a nominal 48 V input. This unit is designed to be highly efficient and low cost. It is provided in an industry standard half-brick package.
Part Selection
Output Voltage 5.0 V 3.3 V Input Voltage 48 V 48 V Max. Output Current 30 A 50 A Max. Output Power 150 W 165 W Typical Efficiency 93.0% 92.5% Model Number Active High 0RHB-C5T050 0RHB-C5T033 Model Number Active Low 0RHB-C5T05L 0RHB-C5T03L
Note: Add "G" suffix at the end of the model number to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter Input Voltage (continuous) Remote On/Off I/O Isolation Voltage Ambient Temperature Storage Temperature Min -0.3 V -0.3 V -40 C -55 C Typ Max 80 V 18 V 2000 V 85 C 125 C Notes
Input Specifications
Parameter Input Voltage Input Current (full load) Vo=5.0 V Vo=3.3 V Input Current (no load) Remote Off Input Current Input Reflected Ripple Current (pk-pk) Input Reflected Ripple Current (rms) I t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold Input Over Voltage Threshold
2
Min 36V 31 V 29 V 76 V
Typ 48 V 120 mA 5 mA 20 mA 5 mA 0.05 A s 2
Max 75 V 5.0 A 5.2 A 180 mA 20 mA 40 mA 10 mA 0.1 A s 35 V 33 V 80 V
2
Notes
Tested 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 200 kHz at 25 C.
Note: All specifications are typical 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
48 V Input 3.3 V/50 A, 5.0 V/30 A Output
Output Specifications
Parameter Output Voltage Set Point Vo=5.0 V Vo=3.3 V Line Regulation Vo=5.0 V Vo=3.3 V Load Regulation Vo=5.0 V Vo=3.3 V Regulation Over Temperature (-40 C to +85 C) Vo=5.0 V Vo=3.3 V Output Current Vo=5.0 V Vo=3.3 V Current Limit Threshold Vo=5.0 V Vo=3.3 V Short Circuit Surge Transient Ripple and Noise (rms) Vo=5.0 V Vo=3.3 V Ripple and Noise (pk-pk) Vo=5.0 V Vo=3.3 V Turn on Time Overshoot at Turn on Output Capacitance Vo=5.0 V Vo=3.3 V Transient Response 75% ~ 50% Max Load 50% ~ 75% Max Load 75% ~ 50% Max Load 50% ~ 75% Max Load Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Vo=3.3 V Vo=5.0 V 250 mV 250 uS 250 mV 250 uS 100 mV 200 uS 100 mV 200 uS 400 mV 400 uS 400 mV 400 uS 200 mV 300 uS 200 mV 300 uS Test conditions: di/dt = 0.1 A/uS, Vin=48 V with a 1 uF ceramic capacitor and a 10 uF Tantalum capacitor at the output. 0 uF 0 uF 10000 uF 20000 uF 70 mV 55 mV 15 mS 0% 140 mV 100 mV 20 mS 5% 25 mV 15 mV 50 mV 30 mV 32 A 55 A 38 A 65 A 3A s
2
Min 4.925 V 3.250 V -
Typ 5.000 V 3.300 V 5 mV 3 mV 10 mV 7 mV 45 mV 30 mV -
Max 5.075 V 3.350 V 10 mV 7 mV 20 mV 15 mV 75 mV 50 mV 30 A 50 A 45 A 75 A 5A s
2
Notes Vin=48 V, Io=50% load
0A 0A
Test conditions: 0-20MHz BW, with a 1uF ceramic capacitor and a 10uF Tantalum capacitor at the output.
Note: All specifications are typical at nominal input, full load at 25 C unless noted.
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
48 V Input 3.3 V/50 A, 5.0 V/30 A Output
General Specifications
Parameter Efficiency Vo=5.0 V Vo=3.3 V Switching Frequency Isolation capacitance Output Voltage Trim Range Over Temperature Protection 1 Over Voltage Protection 2 Input to Output Isolation Voltage MTBF Dimensions Inches millimeters Weight 2.28 x 2.4 x 0.42 57.51 x 60.98 x 10.67 76 g 90% 90% 300 kHz 80% Vo 93.0% 92.5% 330 kHz 1500 pF 120 C 130% Vo TBD 360 kHz 110% Vo 2000 V Vin=48V, full load , Ta=25C Min Typ Max Notes
Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 C)
Notes: All specifications are typical at 25 C unless otherwise stated. 1. OVP is tested under 48 Vin and full load with photo coupler short. The output will be latched off if the output voltage exceeds over voltage specification. To turn the converter on requires either cycling the ON/OFF pin or power to the converter. 2. Isolation between input and output is basic isolation, test duration is 60 seconds.
Control Specifications
Parameter Remote On/Off Signal Low (Unit On) Signal High (Unit Off) Signal Low (Unit Off) Signal High (Unit On) Active Low Active High -0.3 V 2.4 V -0.3 V 2.4 V 0.8 V 18 V 0.8 V 18 V The remote on/off pin open, Unit off. The remote on/off pin open, Unit on. Min Typ Max Notes
Output Trim Equations
Equations for calculating the trim resistor (in k) are shown below. The Trim Down resistor should be connected between the Trim pin and Ground pin. The Trim Up resistor should be connected between the Trim pin and the Vout. Only one of the resistors should be used for any given application.
Rtrimdown =
100 - 2[k] delta
Module
Vout Trim GND
Vout Module Trim GND Rtrimup
Rtrimup =
Notes:
(100 + delta) Vo - 122.5 - 2[k] 1.225 delta
Rtrimdown
delta =
(Vo _ req - Vo ) x100[%]
Vo
Vo_req=Desired(trimmed) output voltage[V] Output voltage Vo=3.304 V for 3.3 V; Vo=5.008 V for 5 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
48 V Input 3.3 V/50 A, 5.0 V/30 A Output
Efficiency Data
Efficiency Curve 94% 90% Efficiency
Efficiency 94% 90% 86% 82% 78% 74% 70%
Efficiency Curve
86% 82% 78% 74% 70% 5 10 15 20 25 30 35 40 45 50 36 V 48 V 75 V
36 V 48 V 75 V
5
10
15
20
25
30
Output Current (A)
Output Current (A)
0RHB-C5T03x
0RHB-C5T05x
Thermal Derating Curves
0RHB-C5T03x
0RHB-C5T05x
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
48 V Input 3.3 V/50 A, 5.0 V/30 A Output
Ripple and Noise Waveforms
Ripple and noise at full load 3.3 V/50 A output
Ripple and noise at full load 5.0 V/30 A output
Note: Ripple and noise at 48 V input, with a 1 uF ceramic capacitor and a 10 uF tantalum capacitor at the output and Ta=25 deg C,.
Transient Response Waveforms
Vout=3.3 V, 50% to 75% Load Transients
Vout=3.3 V, 75% to 50% Load Transients
Vout=5.0 V, 50% to 75% Load Transients
Vout=5.0 V, 75% to 50% Load Transients
Note: Transient Response is tested at di/dt=0.1 A/us (Vo=3.3 V), di/dt=0.5 A/us (Vo=5.0 V), Vin=48 V, Ta=25C, with a 1 F ceramic capacitor and a 10 F tantalum capacitor at the output.
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
48 V Input 3.3 V/50 A, 5.0 V/30 A Output
Mechanical Outline
Pin Connections
pin# 1 2 3 4 5 function -Input N/A On/Off +Input +Output pin size 0.04" 0.04" 0.04" 0.08" pin# 6 7 8 9 10 11 function N/A +Sense Trim -Sense N/A -Output pin size 0.04" 0.04" 0.04" 0.08"
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. 032206
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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