MAX5913AEMH ,+48V Quad Hot-Swap Controllers For Power-Over-LANApplicationsSTAT2 3 31 OCENSTAT3 4 30 DGNDPower-Over-LANSTAT4 5 29 VCCPower-Over-MDI CSP1CSP4 6 MAX ..
MAX5913EMH ,+48V Quad Hot-Swap Controllers For Power-Over-LANApplicationsSTAT2 3 31 OCENSTAT3 4 30 DGNDPower-Over-LANSTAT4 5 29 VCCPower-Over-MDI CSP4 6 MAX5913 ..
MAX5915EUI ,Dual PCI 2.2 Hot-Swap ControllersApplicationsOrdering InformationPCI 2.2 ServerFAULT TEMP PIN-PCI ServerPARTMANAGEMENT RANGE PACKAGE ..
MAX5915EUI ,Dual PCI 2.2 Hot-Swap ControllersFeaturesThe MAX5915/MAX5916 dual PCI 2.2 hot-swap con- PCI 2.2 Complianttrollers allow for safe in ..
MAX5915EUI+ ,Dual PCI 2.2 Hot-Swap ControllersELECTRICAL CHARACTERISTICS(V = -12V, V = +12V, V = +3.3V, V = V = +5V, T = T to T , unless otherwis ..
MAX5916AEUI+ ,Dual PCI 2.2 Hot-Swap ControllersFeaturesThe MAX5915/MAX5915A/MAX5916/MAX5916A dual ♦ PCI 2.2 CompliantPCI 2.2 hot-swap controllers ..
MAZ8075-M ,Silicon planar typeFeatures•Extremely low noise voltage caused from the diode (2.4V to 39V,1/3 to 1/10 of our conventi ..
MAZ8082-H ,Silicon planar typeFeatures•Extremely low noise voltage caused from the diode (2.4V to 39V,1/3 to 1/10 of our conventi ..
MAZ8082-L ,Silicon planar typeZener DiodesMAZ8000 SeriesSilicon planar typeUnit : mmFor stabilization of power supplyKA
MAZ8082-M ,Silicon planar typeElectrical characteristics within part numbers T = 25°CaTemperaturecoefficient ofZener voltage Rev ..
MAZ8091G ,Silicon planar typeelectrical characteristics WZ Zwithin part numbersReverse current I V Specified valuemAR R2*Tempera ..
MAZ8091-H ,Silicon planar typeElectrical Characteristics T = 25°CaParameter Symbol Conditions Min Typ Max UnitForward voltage V ..
MAX5913AEMH
+48V Quad Hot-Swap Controllers For Power-Over-LAN
General DescriptionThe MAX5913A/MAX5914A are quadruple hot-swap con-
trollers. The MAX5913A/MAX5914A independently con-
trol four external n-channel switches to hot-swap system
loads from a single VCCsupply line. The devices allow
the safe insertion and removal of power devices from live
network ports. The operating supply voltage range is
between +35V and +72V. The devices are intended for
applications in Power-Over-Media-Dependent Interface
(MDI), but are not limited to such usage.
The MAX5913A/MAX5914A feature an internal under-
voltage lockout (UVLO) function that prevents the FET
from turning on, if VCCdoes not exceed the default
value of +32V. The devices also feature a +12V relay
driver with 100mA current drive capable of driving low-
voltage +3.3V relays. The MAX5913A features an
active-low relay driver that sinks current when the relay
output is enabled. The MAX5914A features an active-
high relay driver output that sources 1mA to drive an
external FET relay driver when the relay output is
enabled. Control circuitry ensures the relays and the
FETs are off until VCCreaches the UVLO threshold. The
MAX5913A/MAX5914A use an external sense resistor
to enable all the internal current-sense functions.
The MAX5913A/MAX5914A feature a programmable
analog current-limit circuit. If the switch remains in current
limit for more than a programmable time, the n-channel
FET latches off and the supply can be restarted either by
autoretry or by an external command after the preset off-
time has elapsed.
The MAX5913A/MAX5914A are available in a 44-pin
MQFP package and are specified for the extended
-40°C to +85°C operating temperature range.
ApplicationsPower-Over-LAN
Power-Over-MDI
IP Phone Switches/Routers
Telecom Line Cards
Network Switches/Routers
Midspan Power-Over-MDI
FeaturesWide Operating Input Voltage Range:
+35V to +72VIEEE®802.3af CompatibleFour Independent Power Switch ControllersOpen-Circuit Detector On-Board Charge Pumps to Drive External
n-Channel FETsCurrent Sense with External ResistorFoldback Current Limiting+32V Input Undervoltage LockoutOn-Chip +12V, 100mA Voltage Relay Drivers
MAX5913A/MAX5914A
+48V Quad Hot-Swap Controllers For
Power-Over-LANRTRYEN
STATOUT
OCEN
DGND
VCC
CSP1
DRAIN1
GATE1
OUT1
CSP2
DRAIN2
FAULT
STAT1
STAT2
STAT3
STAT4
CSP4
DRAIN4
OUT4
GATE4
CSP3
DRAIN31314151617181920212243424140393837363534
OUT3
GATE3
RLY
RLYD3RLYD4
DGND
RLYD1RLYD2
AGND
OUT2
GATE2
RTIMON4RLYON4ON3RLYON3ON2RLYON2ON1RLYON1DC
TOP VIEW
MAX5913A
MAX5914A
Pin Configuration
Ordering Information19-3302; Rev 1; 1/11
PARTTEMP RANGEPIN-PACKAGE
MAX5913AEMH+-40°C to +85°C44 MQFP
MAX5913AEMH+T-40°C to +85°C44 MQFP
MAX5914AEMH+-40°C to +85°C44 MQFP
MAX5914AEMH+T-40°C to +85°C44 MQFP
Typical Operating Circuit appears at end of data sheet.+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
IEEE is a registered service mark of the Institute of Electrical and
Electronics Engineers, Inc.
MAX5913A/MAX5914A
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VCC= VCSP_ = +48V, VAGND= VDGND= 0V, VDD= +3.3V, VRLY= +12V, TA= -40°C to +85°C, unless otherwise noted. Typical val-
ues are at VCC= VCSP_ = +48V and TA= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VCCto AGND or DGND..........................................-0.6V to +76V
DRAIN_, OUT_ to AGND or DGND.............-0.6V to (VCC+0.3V)
CSP_ to VCC..........................................................-0.3V to +0.3V
GATE_ to OUT_ .....................................................-0.3V to +13V
VRLYto DGND........................................................-0.3V to +18V
RLYD_ to DGND........................................-0.3V to (VRLY+ 0.3V)
ON_, RLYON_, OCEN, RTRYEN, STATOUT,
DC to DGND........................................................-0.3V to +12V
FAULTto DGND.....................................................-0.3V to +12V
STAT_, RTIM to DGND...............................-0.3V to (VDD+ 0.3V)
VDDto DGND...........................................................-0.3V to +7V
DGND to AGND...........................................................-5V to +5V
Current into RLYD_.........................................-50mA to +150mA
Current into Any Other Pin................................................±50mA
Continuous Power Dissipation (TA= +70°C)
44-Pin MQFP (derate 12.7mW/°C above +70°C).........1.013W
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s)................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER SUPPLIESAnalog Supply VoltageVCCMeasured with respect to AGND3572V
TA = 0°C to +85°C2.74Analog Supply CurrentISVCC = VCSP_ = 72V
IS = ICC + ICSPTA = -40°C to 0°C5mA
Digital Supply VoltageVDDMeasured with respect to DGND2.53.33.7V
Digital Supply CurrentIDDAll logic outputs high, RTIM unconnected1.13mA
Analog Supply Undervoltage
LockoutVUVLOVCC rising, circuits enabled293235V
UVLO HysteresisVUVLO,H3V
UVLO Deglitch DelaytD,UVLOVON = 3.3V, VRLYON = 3.3V (Figure 1)12.825.638.4ms
Relay Driver SupplyVRLYMeasured with respect to DGND14V
Ground Potential DifferenceVGGVoltage difference between DGND and AGND-44V
FEEDBACK INPUT AND CURRENT SENSEOUT Sense Bias CurrentIFPVOUT_ = VCC2µA
Initial Feedback VoltageVFB_S
Voltage under which the foldback circuit
starts reducing the current-limit value
(Note 1)V
Current-Limit Threshold VoltageVSCMaximum ∆V across RSENSE at VOUT > VFB_S125142.5160mV
Foldback VoltageVFLBKMaximum ∆V across RSENSE at VOUT = 0V424854mV
Fast Discharge ThresholdVFC360420480mV
Switch-On ThresholdVSWONMaximum VCC - VOUT at which the switch is
defined as fully on, VOUT increasing1.21.51.8V
Switch-On Comparator HysteresisVSWON_H160mV
MOSFET DRIVERSVGATE - VCC when switch is fully on
0°C to +85°C7911Gate Overdrive VoltageVGS
TA = -40°C to 0°C7912
MAX5913A/MAX5914A
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
ELECTRICAL CHARACTERISTICS (continued)(VCC= VCSP_ = +48V, VAGND= VDGND= 0V, VDD= +3.3V, VRLY= +12V, TA= -40°C to +85°C, unless otherwise noted. Typical val-
ues are at VCC= VCSP_ = +48V and TA= +25°C.)
Note 1:See Typical Operating Characteristicsfor Current-Limit Foldback, and refer to Current Sensing and Regulationsection.
Note 2:The resistor at RTIM can range from 2kΩto 40kΩ.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSDuring current regulation8µA
VON = 0V1mAGate Discharge CurrentIGATE,DIS
(VCSP_ - VDRAIN_) > VFC15mA
Source-Gate Clamp VoltageVSGZVOUT_ = 0V, force 30mA into GATE_,
measure VGATE - VOUT1416.518
OPEN-CIRCUIT DETECTOROpen-Circuit Current-Threshold
VoltageVOCMinimum ∆V across RSENSE to detect an
open circuit1.534.5mV
Delay to Open-Circuit DetecttOC(Figure 2)4509001350ms
Deglitch DelaytLPFD(VCSP_ - VDRAIN__) < VOC (Figure 2)106204302ms
RELAY DRIVERSMaximum Low Voltage (MAX5913A)VRLOWRLYON = high, IRLYD_ = 100mA0.5V
Relay Pullup Current (MAX5914A)IRPLUPRLYON = high, VRLYD_ = 0V0.30.81.3mA
Clamp Diode VoltageVRCLAMPForce 100mA into RLYD, measure VRLYD -
VRLY2V
Relay Output LeakageRLYON_ = low, VRLYD_ = VRLY1µA
TIMINGRRTIM = 2kΩ4.86.48.0
RRTIM = 40kΩ76128180Short-Circuit and Startup Timer
(Note 2)tOOn time for continuous
overcurrent conditions
RRTIM = ∞3.26.49.6
DC = logic low1
DC = logic high2Auto-Retry Duty Cycle
DC = unconnected4
Port Turn-On DelaytON_DELVON = 3.3V (Figure 3)12.825.638.4ms
Relay Turn-Off DelaytOFF_DELAfter RLYON_ goes low (Figure 3)1.63.24.8ms
DIGITAL INTERFACEDC Pin Input-Voltage HighVIH_DC2.5V ≤ VDD ≤ 3.7V0.7 x VDDV
DC Pin Input-Voltage LowVIL_DC2.5V ≤ VDD ≤ 3.7V0.3 x VDDV
DC Pin Input Impedance RIN_DC1kΩ
Logic Input HighVIH2.5V ≤ VDD ≤ 3.7V0.8 x VDDV
Logic Input LowVIL2.5V ≤ VDD ≤ 3.7V0.3 x VDDV
Logic Input Leakage1µA
FAULT Output-Voltage LowVFLISINK = 4mA0.4V
FAULT High Input Leakage1µA
Logic Output-Voltage HighVOHSTAT_ outputs sourcing 0.5mAVDD - 0.4mV
Logic Output-Voltage LowVOLSTAT_ outputs sinking 0.5mA0.4V
MAX5913A/MAX5914A
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
Typical Operating Characteristics(VCSP_ = VCC= +48V, VDD= +3.3V, VRLY= +12V, VAGND= VDGND= 0V, RTIM = open, TA= +25°C, unless otherwise specified.)
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX5913A/14A toc01
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +85°CTA = +25°C
TA = -40°C
SUPPLY CURRENT
vs. TEMPERATURE
MAX5913A/14A toc02
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
VCC = +36V
VCC = +48V
VCC = +57V
VCC = +72V
UNDERVOLTAGE LOCKOUT
vs. TEMPERATURE
MAX5913A/14A toc03
TEMPERATURE (°C)
UVLO (V)
VCC RISING
VCC FALLING
GATE OVERDRIVE VOLTAGE
vs. INPUT VOLTAGE
MAX5913A/14A toc04
INPUT VOLTAGE (V)
GATE OVERDRIVE (V)
TA = -40°C
TA = +85°C
TA = +25°C
GATE OVERDRIVE VOLTAGE
vs. TEMPERATURE
MAX5913A/14A toc05
TEMPERATURE (°C)
GATE OVERDRIVE (V)
VCC = +57VVCC = +72V
VCC = +48V
VCC = +36V
STARTUP WAVEFORMSMAX5913A/14A toc06
4ms/div
A: VON = VRLYON, 5V/div
B: VRLYD, 20V/div
C: VOUT, 20V/div
D: VGATE, 20V/div
TURN-OFF WAVEFORMSMAX5913A/14A toc07A
4ms/div
A: VON = VRLYON, 5V/div
GATE TURN-OFF WAVEFORMMAX5913A/14A toc08A00
10ms/div
A: VRLYD, 20V/div
UVLO TURN-ON DELAYMAX5913A/14A toc09CD
4ms/div
RLYON = VDD
MAX5913A/MAX5914A
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
TURN-ON INTO CAPACITIVE LOAD
(CL = 0.47μF)MAX5913A/14A toc100
400μs/div
RLYON = VDD
A: VON, 5V/div
B: VGATE, 20V/div
C: VOUT, 20V/div
D: IOUT, 100mA/div
TURN-ON INTO CAPACITIVE LOAD
(CL = 47μF)MAX5913A/14A toc110
1ms/div
RLYON = VDD, RRTIM = 2kΩ
A: VON, 5V/div
B: VGATE, 20V/div
C: VOUT, 20V/div
D: IOUT, 200mA/div
TURN-ON INTO CAPACITIVE LOAD
(CL = 470μF)MAX5913A/14A toc120
10ms/div
RLYON = VDD, RRTIM = 40kΩ
A: VON, 5V/div
B: VGATE, 20V/div
C: VOUT, 20V/div
D: IOUT, 200mA/div
CURRENT-LIMIT FOLDBACK
(VCC = +36V)MAX5913A/14A toc13
10ms/div
RLYON = VDD, RL = 100Ω, RRTIM = 40kΩ, CLOAD = 470μF
A: VON, 5V/div
B: VOUT, 10V/div
C: IOUT, 200mA/div
CURRENT-LIMIT FOLDBACK
(VCC = +48V)MAX5913A/14A toc14C
10ms/div
RLYON = VDD, RL = 139Ω, RRTIM = 40kΩ, CLOAD = 470μF
A: VON, 5V/div
B: VOUT, 10V/div
C: IOUT, 200mA/div
CURRENT-LIMIT FOLDBACK
(VCC = +57V)MAX5913A/14A toc15C
10ms/div
RLYON = VDD, RL = 162Ω, RRTIM = 40kΩ, CLOAD = 470μF
A: VON, 5V/div
B: VOUT, 10V/div
C: IOUT, 200mA/div
ypical Operating Characteristics (continued)(VCSP_ = VCC= +48V, VDD= +3.3V, VRLY= +12V, VAGND= VDGND= 0V, RTIM = open, TA= +25°C, unless otherwise specified.)
MAX5913A/MAX5914A
+48V Quad Hot-Swap Controllers For
Power-Over-LANypical Operating Characteristics (continued)(VCSP_ = VCC= +48V, VDD= +3.3V, VRLY= +12V, VAGND= VDGND= 0V, RTIM = open, TA= +25°C, unless otherwise specified.)
CURRENT-LIMIT FOLDBACK
(VCC = +72V)MAX5913A/14A toc16C
10ms/div
RLYON = VDD, RL = 200Ω, RRTIM = 40kΩ
A: VON, 5V/div
B: VOUT, 10V/div
C: IOUT, 200mA/div
CURRENT-LIMIT FOLDBACK
(VCC = +57V)MAX5913A/14A toc170
10ms/div
RLYON = VDD, RL = OPEN,
RRTIM = 40kΩ, CLOAD = 470μF
A: VON, 5V/div
B: VOUT, 10V/div
C. IOUT, 200mA/div
OVERCURRENT DELAY
(EXPANDED TIME SCALE)MAX5913A/14A toc200
1ms/div
RTRYEN = VDD, RLYON = ON = VDD,
DC = DON'T CARE, RRTIM = 2kΩ, RL = 100Ω
A: VGATE, 20V/div
B: IOUT, 200mA/div
OVERCURRENT DELAYMAX5913A/14A toc19
20ms/div
RTRYEN = VDD, RLYON = ON = VDD, DC = 4%,
RRTIM = 2kΩ, RL = 100Ω
A: VGATE, 20V/div
B: IOUT, 200mA/div
CURRENT-LIMIT FOLDBACK
(VCC = +72V)MAX5913A/14A toc180
20ms/div
RLYON = VDD, RL = OPEN, RRTIM = 40kΩ, CLOAD = 470μF
A: VON, 5V/div
B: VOUT, 20V/div
C: IOUT, 200mA/div0
SHORT-CIRCUIT RESPONSE
(VCC = +48V)MAX5913A/14A toc21
1ms/div
ON = RLYON = VDD, RL = 1Ω, RRTIM = 2kΩ
A: IOUT, 200mA/div
B: VGATE, 20V/div
MAX5913A/MAX5914A
+48V Quad Hot-Swap Controllers For
Power-Over-LANypical Operating Characteristics (continued)(VCSP_ = VCC= +48V, VDD= +3.3V, VRLY= +12V, VAGND= VDGND= 0V, RTIM = open, TA= +25°C, unless otherwise specified.)
SHORT-CIRCUIT RESPONSE
(VCC = +48V EXPANDED TIME SCALE)MAX5913A/14A toc220
40μs/div
ON = RLYON = VDD, RL = 1Ω, RRTIM = 2kΩ
A: IOUT, 200mA/div
B: VGATE, 20V/div
PEAK SHORT-CIRCUIT RESPONSE
(VCC = +48V EXPANDED TIME SCALE)MAX5913A/14A toc23
1μs/div
ON = RLYON = VDD, RL = 1Ω, RRTIM = 2kΩ
A: IOUT, 5A/div
B: VGATE, 20V/div
SHORT-CIRCUIT RESPONSE
(VCC = +57V)MAX5913A/14A toc24
1ms/div
ON = RLYON = VDD
A: IOUT, 200mA/div
B: VGATE, 20V/div
PEAK SHORT-CIRCUIT RESPONSE TIME
(VCC = +57V, EXPANDED TIME SCALE)MAX5913A/14A toc26
1μs/div
ON = RLYON = VDD, RL = 1Ω, RRTIM = 2kΩ
A: IOUT, 5A/div
B: VGATE, 20V/div
SHORT-CIRCUIT RESPONSE
(VCC = +72V)MAX5913A/14A toc27
1ms/div
ON = RLYON = VDD
A: IOUT, 200mA/div
B: VGATE, 50V/div
SHORT-CIRCUIT RESPONSE
(VCC = +57V, EXPANDED TIME SCALE)MAX5913A/14A toc250
40μs/div
ON = RLYON = VDD, RL = 1Ω, RRTIM = 2kΩ
A: IOUT, 200mA/div
B: VGATE, 20V/div
tO vs RRTIMMAX5913A/14A toc33
RRTIM (kΩ)
(ms)30252015105
TA = -40°C, +25°C, +85°C
MAX5913A/MAX5914A
+48V Quad Hot-Swap Controllers For
Power-Over-LANypical Operating Characteristics (continued)(VCSP_ = VCC= +48V, VDD= +3.3V, VRLY= +12V, VAGND= VDGND= 0V, RTIM = open, TA= +25°C, unless otherwise specified.)
SHORT-CIRCUIT RESPONSE
(VCC = +72V, EXPANDED TIME SCALE)MAX5913A/14A toc28
40μs/div
ON = RLYON = VDD, RL = 1Ω, RRTIM = 2kΩ
A: IOUT, 200mA/div
B: VGATE, 50V/div
PEAK SHORT-CIRCUIT RESPONSE TIME
(VCC = +72V, EXPANDED TIME SCALE)MAX5913A/14A toc29
1μs/div
ON = RLYON = VDD, RL = 1Ω, RRTIM = 2kΩ
A: IOUT, 5A/div
B: VGATE, 50V/div
OPEN-CIRCUIT THRESHOLD
vs. INPUT VOLTAGEMAX5913A/14A toc30
INPUT VOLTAGE (V)
THRESHOLD VOLTAGE (mV)6660634245485154573639
TA = +25°C
TA = +85°C
TA = -40°C
OPEN-CIRCUIT THRESHOLD
vs. TEMPERATURE
MAX5913A/14A toc31
TEMPERATURE (°C)
THRESHOLD VOLTAGE (mV)
VCC = +36V, +48V,
+57V, AND +72V
OPEN-CIRCUIT GLITCH DELAYMAX5913A/14A toc32
40ms/div
ON = RLYON = VDD, STATOUT = LOW
A: IOUT, 20mA/div
B: VSTAT, 5V/div
C: VGATE, 20V/div
MAX5913A/MAX5914A
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
Typical Operating Characteristics (continued)(VCSP_ = VCC= +48V, VDD= +3.3V, VRLY= +12V, VAGND= VDGND= 0V, RTIM = open, TA= +25°C, unless otherwise specified.)
tO vs. INPUT VOLTAGEMAX5913A/14A toc34
VDD (V)
(ms)
RRTIM = 40kΩ
RRTIM = OPENRRTIM = 2kΩ
RETRY DUTY CYCLE vs. DCMAX5913A/14A toc35
100ms/div
VGATE = 20V/div, RRTIM = 2kΩ
A: VGATE, 20V/div, DC = UNCONNECTED (4%)
B: VGATE, 20V/div, DC = VDD (2%)
C: VGATE, 20V/div, DC = GND (1%)
CHANNEL-TO-CHANNEL CROSSTALKMAX5913A/14A toc36
20μs/div
VTEST
5V/div
VOUT
10mV/div
SEE FIGURE 4 FOR TEST CIRCUIT
Pin Description
PINNAMEFUNCTIONFAULT
Active-Low Fault Output. FAULT is an open-drain output that goes low when a fault is
detected on any of the four channels. FAULT is low when an OC (open circuit) is
detected, or when the MAX5913A/MAX5914A is in auto-retry caused by an overcurrent
condition. When RTRYEN is low, and the channel switch is latched off due to an
overcurrent condition, FAULT remains low until ON_ is driven low.
2, 3, 4, 5
STAT1,
STAT2,
STAT3,
STAT4
Status Outputs. STAT_ are push-pull outputs. Depending on the STATOUT pin status,
STAT_ flags either the Power-OK_ or Port-OC_ status.
Power-OK_ high indicates:
a) ON_ input is high.
b) The switch port is fully on and startup is completed (VCSP_ - VOUT_) < VSWON.
c) Input voltage is above VUVLO.
d) Switch is not in current limit.
Power-OK_ low indicates a fault with any of the above conditions. Port-OC_ output high
indicates that the switch is latched off because the switch current is less than the open-
current threshold, Port-OC is low otherwise.
6, 10, 24, 28CSP4, CSP3, CSP2,
CSP1ur r ent- S ense P osi ti ve Inp ut. C onnect to V CC and p l ace a cur r ent- sense r esi stor fr om C S P _
to D RAIN _. U se a Kel vi n sense tr ace fr om a cur r ent- sense r esi stor to C S P _ ( see Fi g ur e 7) .
7, 11, 23, 27DRAIN4, DRAIN3,
DRAIN2, DRAIN1
MOSFET Drain Current-Sense Negative Input. Connect to drain of power MOSFET and
connect a current-sense resistor from CSP_ to DRAIN_. Use Kelvin sense trace from
current-sense resistor to DRAIN_ (see Figure 7).
MAX5913A/MAX5914A
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
Pin Description (continued)
PINNAMEFUNCTION8, 12, 21, 25OUT4, OUT3,
OUT2, OUT1
MOSFET Source Output Voltage Sense. Connect to a power MOSFET source through a
100Ω series resistor.
9, 13, 22, 26GATE4, GATE3,
GATE2, GATE1
MOSFET Gate Driver Output. The MAX5913A/MAX5914A regulate the gate-drive voltage
to (VCC + 9V) to fully turn on the power n-channel MOSFET. GATE_ sources 10µA during
startup to slowly turn on the MOSFET switch. GATE_ sinks 1mA to turn off the MOSFET
switch.VRLYRelay Supply-Voltage Input. Referenced to DGND.
15, 16, 18,
RLYD3, RLYD4,
RLYD1, RLYD2
Relay-Drive Output. For the MAX5913A, RLYD_ sinks 100mA when the relay driver is
enabled. For the MAX5914A, RLYD_ sources 1mA when the relay driver is enabled.
17, 30DGNDDigital Ground. All logic voltages are referred to DGND. The voltage difference between
DGND and AGND can be up to ±4V.AGNDAnalog Ground. All analog voltages are referred to AGND.VCC
Analog Power Supply. Connect VCC to +35V to +72V power supply. UVLO circuitry turns
off the MOSFET switch and relay for VCC < VUVLO. Bypass VCC to AGND with a 1µF
capacitor.OCEN
Open-Circuit Detector Enable Input. Drive OCEN high to enable open-circuit detector, or
drive low to disable. When enabled, the open-circuit detector waits for a 900ms delay
after Power-OK conditions are met before enabling the open-circuit detector function.STATOUT
Status Output Multiplexer (MUX) Control Input. Controls the signal MUX into the STAT_
outputs. Drive STATOUT high to route Power-OK_ status to STAT_ outputs, or drive
STATOUT low to route Port-OC_ status to STAT_ outputs.RTRYEN
Auto-Retry Enable Input. Drive RTRYEN high to enable auto-retry. Drive RTRYEN low to
enable switch latch-off mode. When switch is latched off, a high-to-low transition on the
ON_ control input clears the latch.DC
Duty-Cycle Programming Input. DC sets the minimum off-time after an overcurrent
condition latches off the switch. When RTRYEN is high, DC sets the auto-retry duty cycle.
Drive DC low for 1% duty cycle, drive DC high for 2%, or leave DC unconnected for 4%
duty cycle.
35, 37, 39,
RLYON1, RLYON2,
RLYON3, RLYON4
Relay-Driver Control Input. Drive RLYON_ high to enable RLYD_, drive RLYON_ low to
turn off the MOSFET switch for the channel and disable RLYD_.
36, 38, 40,
ON1, ON2, ON3,
ON4
MOSFET Switch Control Input. Drive ON_ high to enable GATE_ to turn on the MOSFET
switch. RLYON_ must be high to enable the switch. Drive ON_ low to disable the switch.
Pulling ON_ low also resets the latch when RTRYEN is low or if the switch is latched off
due to open-circuit detection.RTIM
Timing Oscillator Frequency Set Input. Connect a 2kΩ to 40kΩ resistor from RTIM to
DGND to set the maximum continuous overcurrent time, tO. Leave RTIM unconnected to
set default 6.4ms tO.VDDDigital Power Supply. Bypass VDD to DGND with a 1µF capacitor.
