NON-ISOLATED DC/DC CONVERTERS 12V Input / Programmable Output / 30A VRM VRNB-30A07A PRELIMINARY • High efficiency means less power dissipation • Remote on/off • 2-Wire Remote sense • 5 bit voltage programming scheme • Adaptive voltage positioning (Load Line) Description The V7NB-30A07A is a non-isolated step down DC/DC converter capable of supplying up to 30A of average output current with output voltage selection via a 5-bit VID code. Standard features include remote on/off, over current protection, remote sense and a power good signal. This product also makes use of adaptive positioning to improve transient response performance. This model number can support multiple VID schemes by terminating Pin 9 with specific resistor and reference combinations. Typical applications include file servers, work stations and other computing applications. Input Specifications Parameter Input Voltage Range Input Current (disabled) Input Current (full load) Reflected Ripple Current Min 10.8 VDC Typ Max 13.2 VDC Notes 30mA 8A 150mA rms With 100uF, 25mOhm capacitor and 200nH of input inductance. Output Specifications Parameter Output Current Set Point Accuracy Min 0A 1.62V Load Line Impedance Typ 1.65 1.65 mOhm Ripple and Noise 25mV Turn on Time Transient Response 8mS Deviation Settling Time Notes no load, excluding adaptive positioning, VID 01000 (08h), pin 9 terminated to ground through a 4.77K resistor. 50mV droop from 0 to 30A pk-pk, 0 to 20MHz Bandwidth Full load with external 6 x 470uF 7mOhm Polymer capacitors and 6 x 10uF X5R ceramic capacitors. 16mS di/dt = 2.5A/uS Load step =50% of max load. External Cout as specified for ripple and noise. Includes Load Line 50mV 175uS Remote Sense Compensation Output Capacitance Max 30A 1.68V ±0.3VDC 800uF 5,000uF For applications requiring higher or lower output capacitance please consult factory. Note 1: Feedback compensation optimized for external 6 x 470uF, 7mOhm, polymer capacitors and 6 x 10uF X5R ceramic capacitors. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 12V Input / Programmable Output / 30A VRM General Specifications Pin Connections Parameter Switching Frequency Dimensions Specification 1.2 MHz typical (fixed) inches mm Row A Pin 3.8 x 1.0 x .81 96.5 x 25.4 x 20.6 0°C to 70°C -40°C to 100°C Operating Temperature Non-Operating Temperature Protection Features Over current Undervoltage Remote On/Off Efficiency (full load) 1.25V output 120% to 175% max Io UVLO Vin < 9.5V Active High 82.5% Voltage Identification (VID) Code VID4 VID3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 VID2 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 VID1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 VID0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 Vo (VDC) 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 Output Off 1.1 1.125 1.15 1.175 1.2 1.225 1.25 1.275 1.3 1.325 1.35 1.375 1.4 1.425 1.45 1.475 1.5 1.525 1.55 1.575 1.6 1.625 1.65 1.675 1.7 1.725 1.75 1.775 1.8 1.825 1.85 See Note 2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Function VIN+ VIN+ VIN+ VIN+ Reserved No pin VID3 VID1 Analog Trim PWRGD VO-senUVLO_SET VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VO- Row B Pin 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 Function VINVINVINVINVRM-pres VID4 VID2 VID0 NC OUTEN VO-sen+ Reserved VO+ VO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VO- Note 2: VRM 9 VID Codes are achieved by terminating pin 9 to ground with an equivalent resistance of 4.77K. Note 3: Output voltage Vs. VID can be modified by minus 400mV at each VID by applying a reference to pin 9. Applied reference should have a Thevenin Equivalent Voltage of 400mV and Thevenin Equivalent Resistance of 4.77K. Application of this offset reference must be synchronized with enabling the VRM. See Application Circuit 1. Note 4: If pin 9 is floating the resulting output Voltage will be 50% of the values in the VID table at each VID setting. 2004 Bel Fuse Inc. Specifications subject to change without notice. 030104 CORPORATE FAR EAST EUROPE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 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 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 NON-ISOLATED DC/DC CONVERTERS 12V Input / Programmable Output / 30A VRM Mechanical Drawing Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 12V Input / Programmable Output / 30A VRM 9 MEMORY 4.99K Vout 51.1 Zf 52 +S 9.76K Zi 11 -S V error 9.76K 51.1 9.76K VID DAC VRM SET POINT FUNCTIONAL BLOCK DIAGRAM VID0 VID1 VID2 VID3 VID4 Internal Circuit 1. 2004 Bel Fuse Inc. Specifications subject to change without notice. 030104 CORPORATE FAR EAST EUROPE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 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 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 NON-ISOLATED DC/DC CONVERTERS 12V Input / Programmable Output / 30A VRM +Vin ENABLE PWM C0NTROL +Vin 20.5K 53 OUTEN BSS138 BAV99 20.5K VRM ENABLE INTERFACE FUNCTIONAL BLOCK DIAGRAM Internal Circuit 2. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 12V Input / Programmable Output / 30A VRM Recommended circuit to establish a fixed negative offset to the VID values in the VID Table to OUTEN Pin 53 Ibias On/Off Control Rbias Rb= 4,770*Vref Vref - V offset Ra= Vref - V offset *Rb Voffset Vref Shunt Reference Ra Voffset is the fixed offset that will be subtracted from each of the nominal Vout Vs. VID values shown in the VID Table. to MEMORY Pin 9 Rb For best accuracy use a local ground pin on the VRM. Preferably pin 58, 59, 60, 61, or 62. Connected as above. If Vin = 10V and Rbias = 10K then typically: If V ref = 1.24V, Ibias = 170uA, V OUTEN(on) = 2.95V. If V ref = 2.048V, Ibias = 132uA , VOUTEN(on) = 3.36V. Reference Circuit 1. 2004 Bel Fuse Inc. Specifications subject to change without notice. 030104 CORPORATE FAR EAST EUROPE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 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 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