MAX5913AEMHT Просмотр технического описания (PDF) - Maxim Integrated

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MAX5913AEMHT

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

Maxim Integrated 

+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 VOLTAGE

125

RETRY DUTY CYCLE vs. DC

MAX5913A/14A toc35

CHANNEL-TO-CHANNEL CROSSTALK

MAX5913A/14A toc36

100

RRTIM = 40kΩ

75

50

25 RRTIM = OPEN

RRTIM = 2kΩ

0

1.8 2.1 2.4 2.7 3.0 3.3 3.6

VDD (V)

A

VTEST

0

5V/div

B

0

VOUT

C

10mV/div

0

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%)

20µs/div

SEE FIGURE 4 FOR TEST CIRCUIT

Pin Description

PIN

1

2, 3, 4, 5

NAME

FAULT

STAT1,

STAT2,

STAT3,

STAT4

FUNCTION

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.

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, 28

CSP4, CSP3, CSP2,

CSP1

Current-Sense Positive Input. Connect to VCC and place a current-sense resistor from CSP_

to DRAIN_. Use a Kelvin sense trace from a current-sense resistor to CSP_ (see Figure 7).

7, 11, 23, 27

DRAIN4, 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).

_______________________________________________________________________________________ 9

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