VRNB-30A07A

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 30mA 8A 150mA rms With 100uF, 25mOhm capacitor and 200nH of input inductance. Max 13.2 VDC Notes Output Specifications Parameter Output Current Set Point Accuracy Min 0A 1.62V Typ 1.65 Max 30A 1.68V 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 5,000uF For applications requiring higher or lower output capacitance please consult factory. Load Line Impedance Ripple and Noise 1.65 mOhm 25mV Turn on Time Transient Response Deviation Settling Time 8mS 50mV 175uS Remote Sense Compensation Output Capacitance 800uF ±0.3VDC 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 Parameter Switching Frequency Dimensions inches mm Operating Temperature Non-Operating Temperature Protection Features Over current Undervoltage Remote On/Off Efficiency (full load) 1.25V output Specification 1.2 MHz typical (fixed) 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 120% to 175% max Io UVLO Vin < 9.5V Active High 82.5% Pin Connections Row A Pin 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 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 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- Function VINVINVINVINVRM-pres VID4 VID2 VID0 NC OUTEN VO-sen+ Reserved VO+ VO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VOVO+ VO- Voltage Identification (VID) Code VID4 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 VID3 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 VID2 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 VID1 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 VID0 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 Vo (VDC) 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 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. See Note 2. 2004 Bel Fuse Inc. Specifications subject to change without notice. 030104 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 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 52 +S Zf Zi 9.76K 11 9.76K 51.1 9.76K -S V error VID DAC VID0 VID1 VID2 VID3 VID4 VRM SET POINT FUNCTIONAL BLOCK DIAGRAM Internal Circuit 1. 2004 Bel Fuse Inc. Specifications subject to change without notice. 030104 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 NON-ISOLATED DC/DC CONVERTERS 12V Input / Programmable Output / 30A VRM +Vin +Vin 20.5K 53 OUTEN BAV99 20.5K BSS138 ENABLE PWM C0NTROL 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 Shunt Reference Rbias Vref Ra= Rb= 4,770*Vref Vref - V offset Vref - V offset *Rb Voffset Ra Rb to MEMORY Pin 9 Voffset is the fixed offset that will be subtracted from each of the nominal Vout Vs. VID values shown in the VID Table. 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 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