NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
RoHS Compliant
• • • • •
GRND-90A161 Features
• • • • • • Non-Isolated High Efficiency Fixed Frequency Wide Input Remote On/Off
Rev.A
Input Under-Voltage Lockout OCP/SCP 2-Wire Remote sense 7 bit VID Digital Voltage Programming I2C/SMbus Available – Consult Factory
Class 1, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592)
Applications
• • • Networking Computers and peripherals Telecommunications
Description
The GRND-90A Series are non-isolated step down dc/dc converters providing up to 90 A of output current and designed to be compatible with the Intel VRM11 requirements. Standard features include remote on/off, over current protection, remote sense, VR_Hot signal and a power good signal. This product also makes use of adaptive positioning to improve transient response performance. These products may be used almost anywhere low-voltage silicon is being employed and a nominal 12 Vdc source is available. Typical applications include file servers, work stations and other computing applications.
Part Selection
Output Voltage 0.82 Vdc - 1.6 Vdc Input Voltage 10.8 Vdc - 13.2 Vdc Max. Output Current 90 A Max. Output Power 144 W Typical Efficiency 83% Model Number Active High GRND-90A161
Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging.
Part Number Explanation G R ND – 90 A 16 1
1 2 3 45 6 7
1---Goldfinger 2---RoHS 6, change “R” to “7” means RoHS 5 3---Series name 4---Series code 5---Wide input range (10.8-13.2V) 6---Wide output range (0.82-1.6V) 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
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Min -0.3 -0.3 0 -55 Typ Max 15 5.5 70 125 Unit V V °C °C Notes
Absolute Maximum Ratings
Parameter Continuous non-operating Input Voltage Remote On/Off Ambient Temperature Storage Temperature
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) I2t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold Min 10.8 9.5 8.4 Typ 12 17 50 150 10 8.9 Max 13.2 16 700 100 200 1 10.5 9.4 Unit V A mA mA mA mA A2s V V With simulated source impedance of 200nH, 5Hz to 20MHz. Use 2 * 220uF/16V Oscon capacitor Notes
Note: All specifications are typical at 25 °C unless otherwise stated.
Output Specifications
Parameter Output Voltage Set Point Adaptive Positioning Line Regulation Regulation Over Temperature (0deg.C-70deg.C) Ripple and Noise (pk-pk) Ripple and Noise (rms) Ripple and Noise (pk-pk) under worst case Output Current Range Output DC Current Limit Min 1.27 0 95 Typ 1.285 1.25 ±5 ±5 Max 1.3 ±10 ±10 25 10 30 70 90 120 Unit V mOhm mV mV mV mV mV A A A over all operating input voltage, load and temperature conditions. Thermal Design Current Peak Current Rating 0-20 MHz BW Notes No load, excluding adaptive positioning, VRM11 VID 0x32 Droop Impedance
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Min See Note 1
Output Specifications (continued)
Parameter Short Circuit Surge Transient Turn on Time Overshoot at Turn on Output Capacitance Transient Response
△V50%~100%
Typ 3.5 3710
Max 5 5 1
See Note 1
Unit As mS % uF
2
Notes
Consult factory regarding external capacitance outside of this range
Overshoot Settling Time Overshoot Settling Time
-
-
50 25 50 25
mV uS mV uS di/dt=300A/us, Vin=12Vdc, Ta=25°C
of Max Load
△V100%~50%
of Max Load
Notes: 1. Measured with 7*470uF/7mOhm ESR SP-CAP, and 42*10uF/1206 ceramic capacitors on output. 2. All specifications are typical at nominal input, full load at 25°C unless otherwise stated.
General Specifications
Parameter Efficiency Switching Frequency Over Temperature Alert Over Voltage Protection Weight FIT Dimensions Inches (L × W × H) Millimeters (L × W × H) 3.80 x 1.06 x 0.84 96.52 x 26.80 x 21.21 Min 81 100 Typ 83 400 Vo,set + 0.175 46 500 Max 110 Unit % kHz °C V g Calculated Per Bell Core SR-332 (Vin=12 V, Io=70A, Ta = 25 °C, 9 FIT=10 /MTBF) Notes Vin =12V, Iout=70A; VID=0x32
Note: All specifications are typical at 25 °C unless otherwise stated.
Remote On/Off
Parameter Signal Low (Unit Off) Signal High (Unit On) Current Sink Active High Min -0.3 0.8 0 Typ Max 0.4 5.5 1 Unit V V mA Notes The remote on/off pin open, Unit on.
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
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Thermal Derating Curves
②
③
④ ⑤
①
The thermal reference point Tref is shown above. For reliable operation this temperature should not exceed 110°C. The output power of the module should not exceed the rated power for the module.
Vin=12V, VID=0x32 Maximum junction temperature of semiconductors derated to 120 degree C.
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
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Efficiency Data
90.00% 85.00% EFFICIENCY 80.00% 75.00% 70.00% 65.00% 7A 17.5A 35A 52.5A 70A OUTPUT CURRENT(A) VID=0x7E VID=0x32 VID=0x02
Ripple and Noise Waveforms
Ripple and noise at 12Vdc input, VID=0x32, Iout=0A
Ripple and noise at 12Vdc input, VID=0x32, Iout=70A
Note: Ripple and noise at 0-20MHz BW, and 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
NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Transient Response Waveforms
VID=0x32 45A-90A Load Transients
VID=0x32 90A-45A Load Transients
Note: Transient Response at Vin=48V, di/dt=5A/uS, with typical cap bank on output, and Ta=25 deg C.
Over Current Protection
To provide protection in a fault output overload condition, the module is equipped with internal current-limiting circuitry and can endure current limiting for a few mili-seconds. If the overcurrent condition persists beyond a few milliseconds, the module will shut down into hiccup mode. The module operates normally when the output current goes into specified range.
Vin=12V, VID=0x32
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
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Startup & Shutdown
Rise time
VID=0x32, Vin=12V, Iout=70A
Startup time
VID=0x32, Vin=12V, Iout=70A, Ch1: Vout Ch3: OUTEN
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
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Remote Sense
This module has remote sense compensation feature. It can minimize the effects of resistance between module’s output and load in system layout and facilitates accurate voltage regulation at load terminals or other selected point. 1. The remote sense lines carries very little current and hence do not require a large cross-sectional area. 2. This module compensates for a maximum drop of 10% of the nominal output voltage. 3. When using remote sense compensation, all the resistance, parasitic inductance and capacitance of the system are incorporated within the feedback loop of this module. It can make an effect on the module's compensation, affecting the stability and dynamic response. A 0.1uF ceramic capacitor can be connected at the point of load to de-couple noise on the sense wires. 4. Recommend the connection of remote sense compensation as below figure. There are a resistor RS+ (51.1 ohm) from Vo+ to Sense+ and a resistor RS- (51.1 ohm)) from Vo- to Sense- inside of this module.
Vo+
RS+
Sense+ Load SenseRS-
V o-
5. If not using remote sense compensation, please connect sense directly to output at module's pin, that is, connect sense+ to Vo+ and sense- to Vo- at module's pin, the shorter the better. See below figure.
V o+
RS+
Sense+ Load SenseRS-
Vo-
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
8
NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Input Under-voltage Lockout
Under-voltage Lockout
Inp ut Current
Voltage Falling Voltage Rising
V1=8.9V V2=10V
V1
V2
Input Voltage (V)
Power Good
1. This module has a power good indicator output. Power good pin used positive logic and is open collector. 2. Power good pin can sink 1mA. 3. The maximum voltage pulled up externally on Power Good pin should not exceed 5V. 4. When the output is within 10% of the VID setting, the power good pin will be pulled high.
Typical Start-up Using Remote ON/OFF(Vin=12.0V, VID=0x32, Io=0A) Ch1: OUTEN Ch2: PWRGD Ch4: VOUT
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
9
NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mechanical Outline
Row A Pin 1 2 3 4 5 6 7 8 9 10 11 12 13-16 17-20 21-24 Function PWRGD SC OUTEN LL1 VID5 VID3 VID1 Reserved +SENSE SP VR_HOT Reserved Key VIN GND VOUT Pin 25-26 27-30 31-34 35-38 39-42 43-46 47-48 49-52 53-56 57-60 61-64 65-68 69-70 71-74 75-78 79-82 Function GND VOUT GND VOUT GND VOUT GND VOUT GND VOUT GND VOUT GND VOUT GND VOUT Pin 139-140 135-138 131-134 127-130 123-126 119-122 117-118 113-116 109-112 105-108 101-104 97-100 95-96 91-94 87-90 83-86
Row B Function GND VOUT GND VOUT GND VOUT GND VOUT GND VOUT GND VOUT GND VOUT GND VOUT Pin 164 163 162 161 160 159 158 157 156 155 154 153 149-152 145-148 141-144 Function VBIAS SD LL0 VID6 VID4 VID2 VID0 Reserved -SENSE VIDSEL VRM_PRES BUSS ADD Key VIN GND VOUT
Note: 1) Undimensioned components are shown for visual reference only. 2) 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
10
NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Signal Definitions
Vin GND VID0, VID1, VID2, VID3, VID4, VID5, VID6 VIDSEL Input power to the converter Common return for both input and output Logic level inputs used to set the output voltage, refer to VID table. Connect VID0 thru VID6 pins to open-drain outputs with external pull-up resistors. Valid logic low is -0.3V to 0.4V, valid logic high level is 0.8V to 5.5V. Digital input used to select between extended VR10 and VR11 VID tables. Internally pulled up to 3.3V to select VRM11. The open drain power good signal indicates the output voltage is within 10% of the VID setpoint. Remote voltage sense lines. Connect these at the point of load, to VOUT and GND respectively. Output voltage available to the load. Logic level input used to enable the converter when high. Valid logic low is -0.3V to 0.4V, valid logic high level is 0.8V to 5.5V Load line select pins. Working in conjunction with VID_SEL, LL0/LL1 are used to select load line slope. Currently only 1.25mOhm slope is supported. Module can be configured to support multiple load line slopes. Optional serial clock and data pins respectively for SMBus interface. Optional programming pin for set point and over current protection mode. Open-drain output signal, pulled actively low indicating a thermal event has been detected on the VRM. Signal used by system to indicate the VRM is present in the design. Optional addressing pin when using SMBus feature.
PWRGD
Vsense+, VsenseVOUT OUTEN
LL0/LL1
SC SD SP VR_HOT# VRM_PRES BUSS_ADD
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
11
NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr. 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Vout (VDC) OFF OFF 1.60000 1.59375 1.58750 1.58125 1.57500 1.56875 1.56250 1.55625 1.55000 1.54375 1.53750 1.53125 1.52500 1.51875 1.51250 1.50625 1.50000 1.49375 1.48750 1.48125 1.47500 1.46875 1.46250 1.45625 1.45000 1.44375 1.43750 1.43125 1.42500 1.41875 1.41250 1.40625 1.40000 1.39375 1.38750 1.38125 1.37500 1.36875 1.36250 1.35625 1.35000 1.34375 1.33750 1.33125 1.32500 1.31875 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 HEX (VID7 - VID0) 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 A B C D E F Vout (VDC) 1.31250 1.30625 1.30000 1.29375 1.28750 1.28125 1.27500 1.26875 1.26250 1.25625 1.25000 1.24375 1.23750 1.23125 1.22500 1.21875 1.21250 1.20625 1.20000 1.19375 1.18750 1.18125 1.17500 1.16875 1.16250 1.15625 1.15000 1.14375 1.13750 1.13125 1.12500 1.11875 1.11250 1.10625 1.10000 1.09375 1.08750 1.08125 1.07500 1.06875 1.06250 1.05625 1.05000 1.04375 1.03750 1.03125 1.02500 1.01875 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 HEX (VID7 - VID0) 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 A B C D E F Vout (VDC) 1.01250 1.00625 1.00000 0.99375 0.98750 0.98125 0.97500 0.96875 0.96250 0.95625 0.95000 0.94375 0.93750 0.93125 0.92500 0.91875 0.91250 0.90625 0.90000 0.89375 0.88750 0.88125 0.87500 0.86875 0.86250 0.85625 0.85000 0.84375 0.83750 0.83125 0.82500 0.81875
VID CODES (VRM11.0 VID CODES)
HEX (VID6 - VID0) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 A B C D E F
Note: VIDs with VID7=1 not shown because this VRM does not have a VID7 pin.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
12
NON-ISOLATED DC/DC CONVERTERS
10.8 Vdc - 13.2 Vdc Input, 0.82 Vdc - 1.6 Vdc Output, VRM11.0 Compatible Apr 01, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Revision History
Date 2009-9-8 2010-4-1 Revision A B First release 1. Update output current limit; 2. Update MD( the model height change to 0.84’’ max) Changes Detail Approval Jack Fan Jack Fan
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. 040110
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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
