VRAF-08AT5E

NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input Nov. 10, 2010 Vddq/2 / 8 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. RoHS Compliant • • • • • VRAF-08AT5E Features • • • • • • • Non-Isolated High Efficiency Fixed Frequency Rev.A Under-Voltage Lockout Output Enable OCP/SCP Low Cost High Power Density Current Source/Sink Capability Tracking a Reference for Output Voltage Over Voltage Protection (Hiccup Mode) Class 1, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592) Applications • • • Networking Computers and peripherals Telecommunications Description The Bel VRAF-08AT5E module is a non-isolated, step down dc/dc power converter that operates from a nominal 12 Vdc or wide range 5 Vdc to 13.8 Vdc source. This converter is designed specifically to provide bus termination voltages in applications such as DDR (double data rate) memory where the bus termination voltage must closely track the I/O bus voltage. The converter accepts a reference input and uses this to program its output voltage to 50% of the reference. The unit is packaged in compact single-in-line footprint and provides a maximum 8 A output. Standard features include remote on/off, input under-voltage lockout, output over voltage protection. Part Selection Output Voltage 0.9 Vdc Input Voltage 5.0 Vdc - 13.8 Vdc Max. Output Current 8A Max. Output Power 7.2 W Typical Efficiency 69% Model Number VRAF-08AT5E Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging. Part Number Explanation V R AF – 08 A T5 E 12 3 4 5 6 7 1---Vertical mount 2---RoHS 6, change “R” to “7” means RoHS 5 3---Series name (SIP) 4---Series code (output current 8A) 5---Input range (5.0-13.8V) 6---Output voltage (Vddq/2) 7---Suffix Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 1 NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input Nov. 10, 2010 Vddq/2 / 8 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Min -0.5 -0.3 0 -40 Typ Max 15 5.25 70 85 Unit V V °C °C Notes Absolute Maximum Ratings Parameter Input Supply Voltage Input Signal Voltage Operating Temperature Storage Temperature Note: All specifications are typical at 25 °C unless otherwise stated. Input Specifications Parameter Operating Input Voltage Input Current (full load) Input Current (no load) Reference Voltage Range (Vddq) 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 2 Min 5.0 1.2 2.6 2.4 Typ 12 25 1.8 7 110 25 0.006 - Max 13.8 2.2 35 2.0 10 180 60 0.012 3.9 3.7 Unit V A mA V mA mA mA As V V 2 Notes With simulated source impedance of 1000 nH, 5 Hz to 20 MHz. Use a 100 uF/25 V Tan cap with ESR=0.025 ohm max, at 100 kHz@25°C. Notes: 1. All specifications are typical at 25 °C unless otherwise stated. 2. This power module is not internally fused. An input line fuse must always be used. Output Specifications Parameter Output Voltage Set Point Tracking Tolerance (Vddq/2-Vout)/Vout Load Regulation Line Regulation Output Current Output DC Current Limit Output Ripple and Noise (pk-pk) Output Ripple and Noise (rms) Short Circuit Surge Transient Turn on Time Min -1.5 0 9.2 Typ Vddq/2 3 3 25 8 1.1 2.5 Max 1.5 6 6 8 14 50 15 2.2 5 Unit V % mV mV A A mV mV As mS Start up from ENABLE. 2 Notes Vin=12 V, lout=full load Test conditions: 0-20 MHz BW, with a 22 uF / 6.3 V ceramic 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 2 NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input Nov. 10, 2010 Vddq/2 / 8 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Min 0 Typ 0 Max 3 2200 Unit % uF Notes Output Specifications (continued) Parameter Overshoot at Turn on Output Capacitance Transient Response △V50%~100% Overshoot Settling Time Overshoot Settling Time - 100 20 100 20 200 50 200 50 mV uS mV uS di/dt=0.3 A/uS; VO =0.9 V; Vin12 V; and with a 22 uF / 6.3 V ceramic capacitor at the output. of Max Load △V100%~50% of Max Load Note: All specifications are typical at Vin =12 V, Vddq=1.8 V, Io=8 A, Ta= 25°C unless otherwise stated. General Specifications Parameter Efficiency Switching Frequency Weight MTBF Dimensions Inches (L × W × H) Millimeters (L × W × H) 0.65 x 0.41 x 0.40 16.51 x 10.41 x 10.16 Min 68 260 Typ 69 300 2.5 6,416,286 Max 340 Unit % kHz g hours Calculated Per Bell Core SR-332 (IO = 80% load; Vin=12 V; Ta = 25 °C) Notes Vin=12 V, Vddq=1.8 V, Io=8 A Note: All specifications are typical at 25 °C unless otherwise stated. Control Specifications Parameter Output Enable ENABLE High ENABLE Low Min 2 0 Typ Max 5.5 0.8 Unit V V Notes Enable Pin open, the module is off. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 3 NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input Nov. 10, 2010 Vddq/2 / 8 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Efficiency Data Efficiency Curve 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 55.0% 50.0% 45.0% 0.8 2.0 4.0 6.0 8.0 Output Current (A) Efficiency 10.8 V 12.0 V 13.2 V Thermal Derating Curves Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 4 NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input Nov. 10, 2010 Vddq/2 / 8 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Thermal Derating Curve (continued) The thermal reference point Tref is shown above. For reliable operation this temperature should not exceed 115°C. The output power of the module should not exceed the rated power for the module. Vin=12 V, Vddq=1.8 V Ripple and Noise Waveform Note: Ripple and noise at Vin=12 V, Vddq=1.8 V, Io=8 A, with a 22 uF/6.3 V X5R ceramic capacitor at the output, Ta=25 °C. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 5 NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input Nov. 10, 2010 Vddq/2 / 8 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Transient Response Waveforms 50% to 100% load step at Vin=12 V, Vddq=1.8 V 100% to 50% load step at Vin=12 V, Vddq=1.8 V Note: Transient response at di/dt=0.3 A/uS, with 22 uF/6.3 V X5R ceramic capacitor at the output, Ta=25 °C. Output Tracking Test condition: Vin=12 V, Vddq=1.8 V, Io=8 A. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 6 NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input Nov. 10, 2010 Vddq/2 / 8 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Mechanical Outline Pin Connections Pin 1 2 3 4 5 Function Vin Vddq Vout (Vtt) GND Enable Note: This module is recommended and compatible with Pb-Free Wave Soldering and must be soldered using a peak solder temperature of no more than 260 ºC 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 NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input Nov. 10, 2010 Vddq/2 / 8 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Revision History Date 2010-11-10 Revision A First release Changes Detail Approval HL Lu RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. ©2010 Bel Fuse Inc. Specifications subject to change without notice. 111010 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