MAX5913AEMH-T Просмотр технического описания (PDF) - Maxim Integrated

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MAX5913AEMH-T

+48V Quad Hot-Swap Controllers For Power-Over-LAN

Maxim Integrated 

+48V Quad Hot-Swap Controllers For

Power-Over-LAN

Pin Description (continued)

PIN

8, 12, 21, 25

9, 13, 22, 26

14

15, 16, 18,

19

17, 30

20

29

31

32

33

34

35, 37, 39,

41

36, 38, 40,

42

43

44

NAME

OUT4, OUT3,

OUT2, OUT1

GATE4, GATE3,

GATE2, GATE1

VRLY

RLYD3, RLYD4,

RLYD1, RLYD2

DGND

AGND

VCC

OCEN

STATOUT

RTRYEN

DC

RLYON1, RLYON2,

RLYON3, RLYON4

ON1, ON2, ON3,

ON4

RTIM

VDD

FUNCTION

MOSFET Source Output Voltage Sense. Connect to a power MOSFET source through a

100Ω series resistor.

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.

Relay Supply-Voltage Input. Referenced to DGND.

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.

Digital Ground. All logic voltages are referred to DGND. The voltage difference between

DGND and AGND can be up to ±4V.

Analog Ground. All analog voltages are referred to AGND.

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.

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.

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.

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.

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.

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_.

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.

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.

Digital Power Supply. Bypass VDD to DGND with a 1µF capacitor.

10 ______________________________________________________________________________________

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