MAX5913EMH Maxim Integrated Products, MAX5913EMH Datasheet

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MAX5913EMH

Manufacturer Part Number
MAX5913EMH
Description
+48V Quad Hot-Swap Controllers For Power-Over-LAN
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX5913EMH.pdf (20 pages)
The MAX5913/MAX5914 are quadruple hot-swap con-
trollers. The MAX5913/MAX5914 independently control
four external N-channel switches to hot-swap system
loads from a single V
the safe insertion and removal of power devices from
live network ports. 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 MAX5913/MAX5914 feature an internal undervolt-
age lockout (UVLO) function that prevents the FET from
turning on, if V
+32V. The devices also feature a +12V relay driver with
100mA current drive capable of driving low-voltage
+3.3V relays. The MAX5913 features an active-low relay
driver that sinks current when the relay output is
enabled. The MAX5914 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
V
MAX5914 use an external sense resistor to enable all
the internal current-sense functions.
The MAX5913/MAX5914 feature a programmable ana-
log 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 MAX5913/MAX5914 are available in a 44-pin MQFP
package and are specified for the extended -40°C to
+85°C operating temperature range.
19-2244; Rev 2; 11/02
Typical Operating Circiut appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
CC
reaches the UVLO threshold. The MAX5913/
Power-Over-LAN
Power-Over-MDI
IP Phone Switches/Routers
Telecom Line Cards
Network Switches/Routers
Mid-Span Power-Over-MDI
CC
________________________________________________________________ Maxim Integrated Products
does not exceed the default value of
CC
General Description
supply line. The devices allow
+48V Quad Hot-Swap Controllers For
Applications
o Wide Operating Input Voltage Range
o IEEE 802.3AF Compatible
o Four Independent Power Switch Controllers
o Open-Circuit Detector
o On-Board Charge Pumps to Drive External
o Current Sense with External Resistor
o Foldback Current Limiting
o +32V Input Undervoltage Lockout
o On-Chip +12V, 100mA Voltage Relay Drivers
MAX5913EMH
MAX5914EMH
DRAIN4
DRAIN3
+35V to +72V
N-Channel FETs
FAULT
GATE4
STAT1
STAT2
STAT3
STAT4
CSP4
OUT4
CSP3
TOP VIEW
PART
10
11
1
2
3
4
5
6
7
8
9
Power-Over-LAN
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
MAX5913
MAX5914
MQFP
Pin Configuration
PIN-PACKAGE
44 MQFP
44 MQFP
Features
33
32
31
30
29
28
27
26
25
24
23
RTRYEN
STATOUT
OCEN
DGND
V
CSP1
DRAIN1
GATE1
OUT1
CSP2
DRAIN2
CC
1

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MAX5913EMH Summary of contents

Page 1

... Four Independent Power Switch Controllers o Open-Circuit Detector o On-Board Charge Pumps to Drive External N-Channel FETs o Current Sense with External Resistor o Foldback Current Limiting o +32V Input Undervoltage Lockout o On-Chip +12V, 100mA Voltage Relay Drivers PART MAX5913EMH MAX5914EMH TOP VIEW FAULT STAT1 Applications STAT2 STAT3 STAT4 ...

Page 2

Quad Hot-Swap Controllers For Power-Over-LAN ABSOLUTE MAXIMUM RATINGS V to AGND or DGND..........................................-0.6V to +76V CC DRAIN_, OUT_ to AGND or DGND................-0. CSP_ to V ..........................................................-0.3V to +0.3V CC GATE_ to OUT_ .....................................................-0.3V to +13V V to ...

Page 3

Quad Hot-Swap Controllers For ELECTRICAL CHARACTERISTICS (continued +48V, AGND = DGND = CSP are +48V and T = +25°C.) (Note 3) CC CSP A PARAMETER ...

Page 4

Quad Hot-Swap Controllers For Power-Over-LAN ( +48V +3.3V, V CSP CC DD RLY SUPPLY CURRENT vs. INPUT VOLTAGE 4.0 3.8 3 +85° +25°C 3.4 A 3.2 3.0 2.8 ...

Page 5

Quad Hot-Swap Controllers For ( +48V +3.3V, V CSP CC DD RLY TURN-ON INTO CAPACITIVE LOAD (C = 0.47µF) L MAX5913/4 toc10 400µs/div RLYON = ...

Page 6

Quad Hot-Swap Controllers For Power-Over-LAN ( +48V +3.3V, V CSP CC DD RLY CURRENT-LIMIT FOLDBACK (V = +72V) CC MAX5913/4 toc16 10ms/div RLYON = ...

Page 7

Quad Hot-Swap Controllers For ( +48V +3.3V, V CSP CC DD RLY SHORT-CIRCUIT RESPONSE (V = +48V EXPANDED TIME SCALE) CC MAX5913/4 toc22 0 0 40µs/div ON = RLYON = ...

Page 8

Quad Hot-Swap Controllers For Power-Over-LAN ( +48V +3.3V, V CSP CC DD RLY SHORT-CIRCUIT RESPONSE (V = +72V, EXPANDED TIME SCALE) CC MAX5913/4 toc28 40µs/div ON = RLYON = ...

Page 9

Quad Hot-Swap Controllers For ( +48V +3.3V, V CSP CC DD RLY t vs. INPUT VOLTAGE o 125 100 R = 40kΩ RTIM OPEN R = 2kΩ 25 RTIM ...

Page 10

Quad Hot-Swap Controllers For Power-Over-LAN PIN NAME OUT4, OUT3, 8, 12, 21, 25 OUT2, OUT1 GATE4, GATE3, 9, 13, 22, 26 GATE2, GATE1 14 V RLY 15, 16, 18, RLYD3, RLYD4, 19 RLYD1, RLYD2 17, 30 DGND 20 AGND ...

Page 11

Quad Hot-Swap Controllers For Detailed Description The MAX5913/MAX5914 quadruple hot-swap controllers provide Power-Over-MDI, also known as Power-Over- LAN systems (Figure 5). The MAX5913/MAX5914 enable control of four external N-channel MOSFET switches from a single V ranging from +35V to ...

Page 12

Quad Hot-Swap Controllers For Power-Over-LAN V UVLO GATE + UVLO Figure 1. UVLO Deglitch Delay V IH RLYON GATE +1V t ON_DEL V RLY RLYD (MAX5913) Figure 3. Port Turn-On Delay, ...

Page 13

Quad Hot-Swap Controllers For V CC DIGITAL INTERFACE INPUTS +12V +3.3V 1µF 1kΩ DIGITAL INTERFACE OUTPUTS 2kΩ Figure 5. Typical Application Circuit A second comparator with a detection threshold of 3V activates a fast 15mA pulldown of the gate. ...

Page 14

Quad Hot-Swap Controllers For Power-Over-LAN CSP 142.5mV FOLDBACK 3mV NL CONTROL R SENSE FROM LOGIC CONTROLLER DRAIN GATE OUT TO LOGIC CONTROLLER OPEN-CIRCUIT DETECTOR OCEN Figure 6. Functional Diagram Internally the circuit compares the output voltage with V to ...

Page 15

Quad Hot-Swap Controllers For MAX5913 RLYD_ is opposite to that of the MAX5914. For the MAX5913, upon the assertion of the RLYON_ input RLYD_ sinks 100mA to DGND. For the MAX5914 when RLYON_ is high, an internal 1mA current ...

Page 16

Quad Hot-Swap Controllers For Power-Over-LAN threshold current, the open-circuit detector turns off the switch after a 25.6ms delay, FAULT goes low and the Port-OC flag is set for that switch. To clear the switch latched-off condition, FAULT and Port-OC ...

Page 17

Quad Hot-Swap Controllers For HIGH-CURRENT PATH MAX5913 MAX5914 Figure 7. Recommended Layout for Kelvin-Sensing Current Through Sense Resistor ______________________________________________________________________________________ Power-Over-LAN I LIM ∆ SENSE I = MAX R SENSE RESISTOR I /3 MAX 0 Figure 8. Foldback ...

Page 18

Quad Hot-Swap Controllers For Power-Over-LAN +48V Figure 9. Power Sent Over Signal Pairs RJ45 RJ45 CAT 5 Figure 10. Power Sent Over Spare Pairs 18 ______________________________________________________________________________________ LAN SWITCH N RJ45 +48V CAT 5 OUT MAX5913 DATA MAX5914 +48V POWER ...

Page 19

Quad Hot-Swap Controllers For V = +35V TO +72V ON1 ON2 ON3 ON4 RLYON1 DIGITAL RLYON2 INTERFACE RLYON3 INPUTS RLYON4 OCEN RTRYEN STATOUT DC MAX5913 +12V V RLY +3. FAULT STAT1 DIGITAL STAT2 INTERFACE ...

Page 20

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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