參數(shù)資料
型號(hào): MAX5981BETE+
廠商: Maxim Integrated
文件頁數(shù): 4/16頁
文件大小: 1328K
描述: IC CTRLR PD IEEE 802.3AF 16TQFN
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 1
類型: 以太網(wǎng)供電控制器 PD 開關(guān)(PoE)
應(yīng)用: 供電設(shè)備(PSE)
內(nèi)部開關(guān):
電流限制: 720mA 至 880mA
電源電壓: 31 V ~ 60 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-WQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 16-TQFN-EP(5x5)
包裝: 管件
IEEE 802.3af/at-Compliant, Powered Device Interface
Controllers with Integrated Power MOSFET
4 ______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
 = (V
DD
 - V
SS
) = 48V, R
DET
 = 24.9k? R
CLS
 = 615? and R
SL
 = 60.4k? RTN, WAD, PG, 2EC, WK, and ULP unconnected, all
voltages are referenced to V
SS,
 unless otherwise noted. T
A
 = T
J
 = -40NC to +85NC, unless otherwise noted. Typical values are at
T
A
 = +25NC.) (Note 3)
Note 3: All devices are 100% production tested at T
A
 = +25NC. Limits over temperature are guaranteed by design.
Note 4: The input offset current is illustrated in Figure 1.
Note 5: Effective differential input resistance is defined as the differential resistance between V
DD
 and V
SS
. See Figure 1.
Note 6: Classification current is turned off whenever the device is in power mode.
Note 7: UVLO hysteresis is guaranteed by design, not production tested.
Note 8: A 20V glitch on input voltage, which takes V
DD
 below V
ON
 shorter than or equal to t
OFF_DLY
 does not cause the
MAX5981A/MAX5981B to exit power-on mode.
Note 9: In power mode, current-limit foldback is used to reduce the power dissipation in the isolation MOSFET during an overload
condition across V
DD
 and RTN.
Figure 1. Effective Differential Input Resistance/Offset Current
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LED Current Programmable
Range
10
20
mA
LED Current with Grounded SL
V
SL
 = 0V
20.5
24.5
28.5
mA
LED Current Frequency
f
ILED
Normal and ULP sleep
mode
MAX5981A
250
Hz
MAX5981B
15.625
kHz
LED Current Duty Cycle
D
ILED
Normal and ULP sleep mode
25
%
V
DD
 Current Amplitude
I
VDD
Normal sleep mode, V
LED
= 3.5V
10
11
12
mA
Internal Current Duty Cycle
D
IVDD
Normal and ULP sleep modes
75
%
Internal Current Enable Time
t
MPS
ULP sleep mode
76
84
92
ms
Internal Current Disable Time
t
MPDO
ULP sleep mode
205
228
250
ms
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
T
SD
T
J
 rising
+140
NC
Thermal-Shutdown Hysteresis
T
J
 falling
28
NC
I
IN
I
INi + 1
I
INi
I
OFFSET
dR
i
1V
V
INi
V
INi + 1
I
OFFSET
 = I
INi
 -
V
INi
dR
i
dR
i
 =
(V
INi + 1
 - V
INi
)
 =
1V
 
(I
INi + 1
 - I
INi
)
 
(I
INi + 1
 - I
INi
)
V
IN
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