SRSB-50T12C

ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Apr. 29, 2011 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. RoHS Compliant       SRSB-50T12C Features         Isolated High Efficiency PRELIMINARY Rev.A Output Over Voltage Shutdown Over Temperature Protection SCP/OCP Basic Insulation Remote On/Off Fixed Frequency (600 kHz) High Power Density Input Under Voltage Lockout Low Cost Class 2, Category 2, Isolated DC/DC Converter (refer to IPC-9592) UL60950-1 Recognized (UL/cUL) (Pending) Applications    Networking Computers and peripherals Telecommunications Description The SRSB-50T12C is an isolated dc/dc converter that operates from a nominal 48 Vdc source. The unit will provide up to 60 W of output power from a nominal 48 Vdc input. The unit is designed to be highly efficient and low cost. Features include remote on/off, over current protection and under -voltage lockout. The converter is provided in an industry standard sixteenth brick package. Part Selection Output Voltage 12 Vdc Input Voltage 36 Vdc - 75 Vdc Max. Output Current 5A Max. Output Power 60 W Typical Efficiency 89% Model Number Active Low SRSB-50T12C Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging. Part Number Explanation S R SB – 50 T 12 C 12 3 4 56 7 1---Surface Mount 2---RoHS 6, change “R” to “7” means RoHS 5 3---Series name, 1/16 brick 4---Series code 5---Input range (36-75V) 6---Output voltage (12V) 7---Option, “x” of the model part number to be 0-9, A-Z, which will represent the special request of customer. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 1 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Apr. 29, 2011 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Absolute Maximum Ratings Parameter Continuous Input Voltage Input Transient Voltage Remote On/Off I/O Isolation Voltage Ambient Temperature Storage Temperature Min -0.3 -0.3 -0.3 -40 -55 Typ Max 80 100 18 1500 85 125 Unit V V V V C C 100mS maximum Notes Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may permanently damage the device. Input Specifications Parameter Operating Input Voltage Input Current (full load) Input Current (no load) Remote Off Input Current Input Reflected Ripple Current (rms) Input Reflected Ripple Current (pk-pk) I t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold 2 Min 36 31 30 Typ 48 70 1 3 20 0.01 32 31 Max 75 2.4 120 3 7 50 0.02 35 34 Unit V A mA mA mA mA As V V 2 Notes With simulated source impedance of 15uH, 5Hz to 20MHz; use a 100uF/100V electrolytic capacitor with ESR=1 ohm max, at 200KHz@25°C. Note: All specifications are typical at 25 C unless otherwise stated. Output Specifications Parameter Output Voltage Set Point Load Regulation Line Regulation Regulation Over Temperature (-40deg.C-85deg.C) Total Regulation Output Ripple and Noise (pk-pk) Output Ripple and Noise (rms) Output Current Range Output DC Current Limit Min 11.75 0 5.2 Typ 12.00 ±9 ±10 ±20 ±39 90 30 6.5 Max 12.25 ±18 ±25 ±35 ±78 180 55 5 8.5 Unit V mV mV mV mV mV mV A A 0-20MHz BW, with a 1µF ceramic capacitor and the minimum external Tantalum cap at output. Notes Vin=48 V, Io=50%Load Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 2 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Apr. 29, 2011 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Output Specifications (continued) Parameter Short Circuit Surge Transient Turn on Time Overshoot at Turn on Output Capacitance Transient Response △V Overshoot 25%~50% of Max Load Settling Time △V 50%~25% of Max Load Min 22 Typ 0.5 35 0 - Max 1 70 5 470 Unit As mS % uF 2 Notes Vo= 12 V - 400 150 400 150 650 300 650 300 mV uS mV uS di/dt=0.1A/us, Vin=48Vdc, Ta=25°C, with a 1µF ceramic capacitor and the minimum external Tantalum cap at output. Overshoot Settling Time Note: All specifications are typical at nominal input, full load at 25°C unless otherwise stated. General Specifications Parameter Efficiency Switching Frequency Min 86 Typ 89 600 Max Unit % kHz ℃ The OTP threshold is set at 125°C in non-latch mode, and the module will restart automatically when temperature falls down to 115°C. This voltage is achieved by trimming up output slowly. Notes Vin=48 V, full load. Over Temperature Protection - 125 - Over Voltage Protection (Static) Weight Dimensions Inches (L × W × H) Millimeters (L × W × H) Isolation characteristics Input to Output Isolation Resistance Isolation Capacitance - 130 TBD 160 - % g - 1.300 x 0.900 x 0.364 33.02 x 22.86 x 9.24 10M - 3900 1500 - V Ohm pF 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 3 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Apr. 29, 2011 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Efficiency Data 90% 85% 80% E F F IC IE N C Y 75% 70% 65% 60% 55% 50% 0.5A 1.25A 2.5A 3.75A 5A OUTPUT CURRENT (A) 36V 48V 75V Thermal Derating Curve Maximum junction temperature of semiconductors derated to 120 degree C. Derating curve under 48V input range Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 4 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Apr. 29, 2011 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Transient Response Waveforms 50%-25% Load Transients at Vin=48 V 25%-50% Load Transients at Vin=48 V Note: Transient response at Vout=12V, di/dt=0.1A/us, External 22uF Tantalum Cap and 1uF Ceramic Cap, and Ta=25 deg C. Ripple and Noise Waveform 48 Vdc input, 12 Vdc/5 A output Note: Ripple and noise at full load, and with a 1uF ceramic cap and a 22 uF Tantalum cap at 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 5 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Apr. 29, 2011 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Remote On/Off Parameter Signal Low (Unit On) Signal High (Unit Off) Current Sink Active Low Min -0.3 2.95 0 Typ Max 0.8 18 1 Unit V V mA Notes The remote on/off pin open, Unit off. Recommended remote on/off circuit for active low Vin+ Vin+ On/off On/off Vin- Vin- Control with open collector/drain circuit Vin + Vcc Control with photocoupler circuit Vin+ On/off On/off Vin - Vin- Control with logic circuit Permanently on Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 6 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Apr. 29, 2011 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Mechanical Outline Pin Connections pin# 1 2 3 4 5 function Vin (+) On/Off Vin (-) Vout (-) Vout (+) Note: This module is recommended and compatible with Pb-Free Reflow Soldering and must be soldered using a reflow profile with a peak temperature of no more than 260ºC for less than 5 seconds. Note: 1) All Pins: Material - Copper Alloy; Finish – 3 micro inches minimum Gold over 50 micro inches minimum Nickel plate. 2) Undimensioned components are shown for visual reference only. 3) All dimensions in inches (mm); Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm). Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 7 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, 12 Vdc/5 A Output Apr. 29, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Revision History Date 2010-04-29 Version PA First release Changes Detail Approval JZ Wang RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. 2011 Bel Fuse Inc. Specifications subject to change without notice. 042911 8 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