adm1014 Analog Devices, Inc., adm1014 Datasheet
adm1014
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adm1014 Summary of contents
Page 1
... COMPARATORS FOR +12V COMBINING LOGIC 12VINA < 10V OVERCURRENT COMPARATOR FOR -12V CHANNEL B ( IDENTICAL TO CHANNEL A ) FUNCTIONAL BLOCK DIAGRAM TM Hot Plug is a trademark of Core International, Inc. One Technology Tel: Fax: 781/326-8703 TM ADM1014 P-CHANNEL MOSFET D 8 CHANNEL P-CHANNEL ...
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... Compact PCI TM PCI Hot-Plug GENERAL DESCRIPTION The ADM1014 is a dual PCI voltage bus controller that allows hot-plugging of adapter cards into and out of an active or pas- sive backplane. The device requires only four external power MOSFETs and a few discrete components for a complete power-control solution for two PCI slots ...
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... ADM1014–SPECIFICATIONS (Continued) (Specifications are for each channel, 3.3VAUX=AUXINA=3.3V MOSFETs +70 C, unless otherwise noted.) A Parameter Gate Charge Current Turn-On Time (PWRON High to 12VG = 1V) Turn-Off Time -12V SUPPLY CONTROL On Resistance of Internal NMOS On Resistance of Internal NMOS Overcurrent Threshold Overcurrent Threshold ...
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... M12VGA PWRONA 36 3VSA 3 35 5VISENA FLTNA 4 FAUXA 5 34 5VSA 33 3V5VGA OCSET 6 GND 7 32 AUXGA 31 AUXINA 8 AUXOA 30 PAUXONA 9 ADM1014 12VGA 29 12VINA 10 TOP VIEW 12VOA (Not to Scale) 28 12VINB 11 12VOB 12 27 PAUXONB 12VGB 26 13 AUXINB AUXOB 25 14 3V5VGB AUXGB 24 15 5VSB FAUXB 23 16 ...
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... Gate of channel B internal NMOS transistor. A capacitor connected from this pin to -12VOB (pin 19) sets the start-up ramp for the +12V supply. During turn-on, this capacitor is charged from a 25µA current source. 19 M12VOB Switched -12V output for channel B. Rated for 100mA. REV. PrN 1/02 PIN FUNCTION DESCRIPTION –5– ADM1014 ...
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... ADM1014 Pin Mnemonic Function 20 M12VINB -12V supply input for channel B. Also provides power to the -12V overcurrent circuitry. 21 3VISENB 3.3V current sense for channel B. A current-sensing resistor is connected between this pin and 3VSB (pin 22). Connect to the load side of the current sense resistor. 22 3VSB 3 ...
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... INHIBIT COMP INHIBIT V /14.5 OCSET COMP V /11.5 OCSET COMP CURRENT TRACKING V /0.8 OCSET I-V CONVERTER COMP CURRENT TRACKING V /3.3 OCSET COMP I-V CONVERTER Figure 1. Simplified Schematic –7– ADM1014 AUXG V C AUXIN C AUXO AND 4.6V 2.9V 10.8V 5VISEN 5VS V CC 3V5VG 3VISEN 3VS 12VG V CC 12VIN 12VO AND -12VG -12VIN ...
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... ADM1014 FUNCTIONAL DESCRIPTION VOLTAGE OUTPUTS The ADM1014 consists of two independent, identical chan- nels, A and B, each of which controls four main power supply voltages and an auxiliary voltage. As the channels are identical, the following description applies to either channel, except where otherwise stated. An on-chip PMOS transistor connected between 12VIN and 12VO switches the +12V supply at currents ...
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... FLTN/FAUXN output will return to a high state. This adjustable delay allows the ADM1014 to ignore overcurrent and undervoltage transients that might otherwise cause an un- wanted shutdown. It should be noted that if a fault is asserted on FLTN and FAUXN at the same time, then the delay is halved, as shown in fig ...
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... The maximum value of the gate capacitors is determined by the need to discharge them quickly when turning off the outputs under fault conditions. If the capacitors are too large the ADM1014 may be unable to protect the power bus or the ex- ternal MOSFETs. With 0.033µF capacitors, the turn-off time will be less than 6µs. ...
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... PCB Sockets-Red 4mm 10A PCB Sockets-Green 4mm 10A PCB Sockets-Black 18 4 P4-7 SMB 19 1 PCB EVAL-ADM1014 Main Board 20 4 R11-12 4K7 0805 chip resistor 21 2 Load Board Fully Assembled Load Board REV. PrN 1/02 RL1 +12V C1 RL2 -12V ...
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... ADM1014 senses the voltage drop directly across the sense resistors and not across any current-carrying trace resistance in series with them. Connections from the ADM1014 to the sense resistors must go directly to the ends of the resistors. Figure 4 shows examples of good and bad practice OUTLINE DIMENSIONS Dimensions shown in inches and (mm) ...