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參數(shù)資料
| 型號： | MAX5942BESE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 19/24頁 |
| 文件大?。?/td> | 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
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (PWM Controller) (continued)
(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
IVDD(NS)
VDD = 36V, driver not switching
0.9
1.6
VDD Supply Current
IVDD(S)
VDD = 36V, driver switching, VOPTO = 4V
1.9
3.2
mA
V+ Shutdown Current
VSS_SHDN = 0V, V+ = 67V
180
290
A
VDD Shutdown Current
VSS_SHDN = 0V
4
20
A
PREREGULATORS/STARTUP
V+ Input Voltage
18
67
V
VDD Supply Voltage
13
36
V
INTERNAL REGULATORS
Powered from V+, ICC = 7.5mA, VDD = 0V
7.5
9.8
12
VCC Output Voltage
Powered from VDD, ICC = 7.5mA
9.0
10.0
11.0
V
VCC Undervoltage Lockout
VCC_UVLO
VCC falling
6.6
V
OUTPUT DRIVER
Peak Source Current
VCC = 11V (externally forced)
570
mA
Peak Sink Current
VCC = 11V (externally forced)
1000
mA
NDRV High-Side Driver
Resistance
ROH
VCC = 11V, externally forced, NDRV
sourcing 50mA
412
NDRV Low-Side Driver
Resistance
ROL
VCC = 11V, externally forced, NDRV sinking
50mA
1.6
4
ERROR AMPLIFIER
FB Input Resistance
RIN
50
k
FB Input Bias Current
IFB
VFB = VSS_SHDN
±1
A
Error Amplifier Gain (Inverting)
AVCL
-20
V/V
Closed-Loop 3dB Bandwidth
200
kHz
FB Input Voltage Range
23
V
SLOPE COMPENSATION
Slope Compensation
VSCOMP
MAX5942A
26
mV/s
THERMAL SHUTDOWN
Thermal Shutdown Temperature
+150
°C
Thermal Hysteresis
25
°C
CURRENT LIMIT
CS Threshold Voltage
VILIM
FB = 4V
419
465
510
mV
CS Input Bias Current
0V
≤ VCS ≤ 2V, FB = 4V
-1
+1
A
Current-Limit Comparator
Propagation Delay
25mV overdrive on CS, FB = V-
180
ns
CS Blanking Time
FB = GND, only PWM comparator is blanked
70
ns
OSCILLATOR
Clock Frequency Range
FB = V-
235
275
314
kHz
MAX5942A, FB = V-
75
85
Max Duty Cycle
MAX5942B, FB = V-
44
50
%
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