參數(shù)資料
型號(hào)： MAX5913
廠商： Maxim Integrated Products, Inc.
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： +48V Quad Hot-Swap Controllers For Power-Over-LAN
中文描述： +48V、四路、熱插拔控制器，用于LAN供電
文件頁(yè)數(shù)： 9/20頁(yè)
文件大?。?/td> 827K
代理商： MAX5913
M
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
_______________________________________________________________________________________
9
Typical Operating Characteristics (continued)
(V
CSP
_ = V
CC
= +48V, V
DD
= +3.3V, V
RLY
= +12V, AGND = DGND = 0, RTIM = open, T
A
= +25
°
C, unless otherwise specified.)
t
o
vs. INPUT VOLTAGE
M
V
DD
(V)
t
O
3.6
3.3
3.0
2.7
2.4
2.1
0
25
50
75
100
125
1.8
R
RTIM
= 40k
R
RTIM
= OPEN
R
RTIM
= 2k
RETRY DUTY CYCLE vs. DC
MAX5913/4 toc35
0
A
B
0
C
0
100ms/div
V
GATE
= 20V/div, R
= 2k
A: V
GATE
, 20V/div, DC = FLOATING (4%)
B: V
GATE
, 20V/div, DC = V
DD
(2%)
C: V
GATE
, 20V/div, DC = GND (1%)
CHANNEL-TO-CHANNEL CROSSTALK
MAX5913/4 toc36
20
μ
s/div
V
5V/div
V
OUT
10mV/div
SEE FIGURE 4 FOR TEST CIRCUIT
Pin Description
PIN
NAME
FUNCTION
1
FAULT
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
MAX5913/MAX5914 is in auto-retry caused by an overcurrent condition. When RTRYEN is
low, and the channel switch is latched off due to 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 (V
CSP
_ - V
OUT
_) < V
SWON
c) Input voltage is above V
UVLO
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
C ur ent- S ense P osi i ve Inp ut. C onnect to V
CC
and p ace a cur ent- sense r esi stor fr om C S P _
to D RAIN _. U se Kel vi n sense tr ace fr om cur ent- sense r esi stor to C S P _ ( see Fi g ur e 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).
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