參數(shù)資料
型號： MAX5940AESA
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 電源管理
英文描述： IEEE 802.3af PD Interface Controller For Power-Over-Ethernet
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封裝： 0.150 INCH, MS-012AA, SOIC-8
文件頁數(shù)： 3/15頁
文件大小： 295K
代理商： MAX5940AESA
M
IEEE 802.3af PD Interface Controller
For Power-Over-Ethernet
_______________________________________________________________________________________
3
Note 1:
Note 2:
Note 3:
All min/max limits are production tested at +85
°
C. Limits at +25
°
C and -40
°
C are guaranteed by design.
The input offset current is illustrated in Figure 1.
Effective differential input resistance is defined as the differential resistance between GND and V
EE
without any external
resistance. See Figure 1.
Note 4:
Classification current is turned off whenever the IC is in power mode.
Note 5:
See
Table
2 in the
PD Classification Mode
section. R
DISC
and R
CL
must be ±1%, 100ppm or better. I
CLASS
includes the IC
bias current and the current drawn by R
DISC
.
Note 6:
See the
Thermal Dissipation
section for details.
Note 7:
When UVLO is connected to the midpoint of an external resistor-divider with a series resistance of 25.5k
(
±
1%), the turn-
on threshold set-point for the power mode is defined by the external resistor-divider. Make sure the voltage on the UVLO
pin does not exceed its maximum rating of 8V when V
IN
is at the maximum voltage (MAX5940B only).
Note 8:
When the UVLO input voltage is below V
TH,G,UVLO,
the MAX5940B sets the UVLO threshold internally.
Note 9:
An input voltage or V
UVLO
glitch below their respective thresholds shorter than or equal to t
OFF_DLY
does not cause the
MAX5940A/MAX5940B to exit power-on mode (as long as the input voltage remains above an operable voltage level of 12V).
Note 10:
Guaranteed by design.
Note 11:
PGOOD references to OUT while
PGOOD
references to V
EE
.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
UVLO Input Ground-Sense
Threshold (Note 8)
V
TH,G,UVLO
50
440
mV
UVLO Input Ground-Sense Glitch
Rejection
UVLO = V
EE
7
μs
Power Turn-Off Voltage,
Undervoltage Lockout Deglitch
Time (Note 9)
t
OFF_DLY
V
IN
, V
UVLO
falling
0.32
ms
T
A
= +25
°
C
(Note 10)
0.6
1.1
Isolation Switch N-Channel
MOSFET On-Resistance
R
ON
Output current =
300mA, V
GATE
= 6V,
measured between
OUT and V
EE
T
A
= +85
°
C
0.8
1.5
Isolation Switch N-Channel
MOSFET Off-Threshold Voltage
V
GSTH
OUT = GND, V
GATE
- V
EE,
output current
< 1μA
0.5
V
GATE Pulldown Switch Resistance
R
G
Power-off mode, V
IN
= 12V,
UVLO = V
EE
for MAX5940B
V
GATE
= 2V
I
GATE
= 1μA
V
OUT
- V
EE
, |V
OUT
- V
EE
| decreasing,
V
GATE
= 5.75V
Hysteresis
(GATE - V
EE
) increasing, OUT = V
EE
Hysteresis
38
80
GATE Charging Current
GATE High Voltage
I
G
5
10
5.76
15
5.93
μA
V
V
GATE
5.59
1.16
1.23
1.31
V
PGOOD,
PGOOD
Assertion V
OUT
Threshold
V
OUTEN
70
4.76
80
mV
V
mV
4.62
4.91
PGOOD,
PGOOD
Assertion V
GATE
Threshold
V
GSEN
PGOOD,
PGOOD
Output Low
Voltage (Note 11)
V
OLDCDC
I
SINK
= 2mA; for PGOOD, OUT
≤
(GND - 5V)
0.4
V
PGOOD Leakage Current (Note 11)
PGOOD
Leakage Current (Note 11)
GATE = high, GND - V
OUT
= 67V
GATE = V
EE
,
PGOOD
- V
EE
= 67V
1
1
μA
μA
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= (GND - V
EE
) = 48V, GATE =
PGOOD
= PGOOD = OUT = OPEN, UVLO = V
EE
, T
A
= -40
°
C to +85
°
C, unless otherwise noted.
Typical values are at T
A
= +25
°
C. All voltages are referenced to V
EE
, unless otherwise noted.) (Note 1)
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MAX5940AESA+ 功能描述:輸入/輸出控制器接口集成電路 IEEE 802.3af PD Int Controller RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
MAX5940AESA+T 功能描述:輸入/輸出控制器接口集成電路 IEEE 802.3af PD Int Controller RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
MAX5940AESA-T 功能描述:輸入/輸出控制器接口集成電路 RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
MAX5940BCSA+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX5940BCSA+T 制造商:Maxim Integrated Products 功能描述:IEEE 802.3AF PD INTERFACE CONTROLLER FOR POWER-OVER-ETHERNET - Tape and Reel
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