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參數(shù)資料
| 型號(hào)： | MAX5942BESE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 18/24頁 |
| 文件大小： | 0K |
| 描述： | IC IEEE 802.3AF POE SYSTM 16SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 控制器類型： | 以太網(wǎng)供電控制器（POE） |
| 接口： | IEEE 802.3af |
| 電源電壓： | 48V |
| 電流 - 電源： | 1mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC |
| 包裝： | 帶卷 (TR) |
MAX5942A/MAX5942B
IEEE 802.3af Power-Over-Ethernet
Interface/PWM Controller for Power Devices
_______________________________________________________________________________________
3
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
UVLO Bias Current
IUVLO
UVLO = 2.460V
-1.5
+1.5
A
UVLO Input Ground Sense
Threshold
VTH,G,UVLO (Note 8)
50
440
mV
UVLO Input Ground Sense Glitch
Rejection
UVLO = VEE
7s
Power Turn-Off Voltage,
Undervoltage Lockout Deglitch
Time
tOFF_DLY
VIN, VUVLO falling (Note 9)
0.32
ms
TA = +25°C
(Note 11)
0.6
1.1
Isolation Switch N-Channel
MOSFET On-Resistance
RON
Output current =
300mA, VGATE = 5.6V,
measured between
OUT and VEE
TA = +85°C
0.8
1.5
Isolation Switch N-Channel
MOSFET Off-Threshold Voltage
VGSTH
OUT = GND, VGATE - VEE, output current
< 1A
0.5
V
GATE Pulldown Switch Resistance
RG
Power-off mode, VIN = 12V, UVLO = VEE
38
80
GATE Charging Current
IG
VGATE = 2V
5
10
15
A
GATE High Voltage
VGATE
IGATE = 1A
5.58
5.76
5.93
V
VOUT - VEE, |VOUT - VEE| decreasing,
VGATE = 5.75V
1.15
1.23
1.31
V
PGOOD, PGOOD Assertion
VOUT Threshold
VOUTEN
Hysteresis
70
mV
(GATE - VEE) increasing, OUT = VEE
4.62
4.76
4.91
V
PGOOD, PGOOD Assertion
VGATE Threshold
VGSEN
Hysteresis
80
mV
PGOOD Output Low Voltage
VOLDCDC
ISINK = 2mA (Note 10)
0.4
V
PGOOD Output Low Voltage
ISINK = 2mA, OUT ≤ (GND - 5V) (Note 10)
0.2
V
PGOOD Leakage Current
GATE = high, GND - VOUT = 67V (Note 10)
1
A
PGOOD Leakage Current
GATE = VEE, PGOOD - VEE = 67V (Note 10)
1
A
ELECTRICAL CHARACTERISTICS (continued)
(VIN = (GND - VEE) = 48V, GATE = PGOOD = PGOOD = OPEN, V- tied to OUT, V+ tied to GND, UVLO = VEE, TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to VEE, unless otherwise noted.) (Note 1)
ELECTRICAL CHARACTERISTICS (PWM Controller)
(All voltages referenced to V-. VDD = 13V, a 10F capacitor connects VCC to V-, VCS = V-, V+ = 48V, 0.1F capacitor connected to
SS_SHDN, NDRV = open circuit, VFB = 3V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SUPPLY CURRENT
IV+(NS)
VDD = 0V, V+ = 67V, driver not switching
0.8
1.6
V+ Supply Current
IV+(S)
V+ = 67V, VDD = 0V, VFB = 4V, driver
switching
1.6
3.2
mA
V+ Supply Current After Startup
V+ = 67V, VDD = 13V, VFB = 4V
14
A
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