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MAX5942BESE 数据表(PDF) 4 Page - Maxim Integrated Products

部件名 MAX5942BESE
功能描述  IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller for Power Devices
PDF  24 Pages
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制造商  MAXIM [Maxim Integrated Products]
网页  https://www.maximintegrated.com/en.html
标志 MAXIM - Maxim Integrated Products

MAX5942BESE 数据表(HTML) 4 Page - Maxim Integrated Products

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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 10µF capacitor connects VCC to V-, VCS = V-, V+ = 48V, 0.1µF 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
µA
VDD Shutdown Current
VSS_SHDN = 0V
4
20
µA
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
Ω
NDRV Low-Side Driver
Resistance
ROL
VCC = 11V, externally forced, NDRV sinking
50mA
1.6
4
Ω
ERROR AMPLIFIER
FB Input Resistance
RIN
50
k
Ω
FB Input Bias Current
IFB
VFB = VSS_SHDN
±1
µA
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/µs
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
µA
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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