MAX5942ACSE データシートの表示（PDF） - Maxim Integrated
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MAX5942ACSE
Maxim Integrated
MAX5942ACSE Datasheet PDF : 24 Pages
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IEEE 802.3af Power-Over-Ethernet
Interface/PWM Controller for Power Devices
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
VDD Supply Current
V+ Shutdown Current
VDD Shutdown Current
PREREGULATORS/STARTUP
V+ Input Voltage
VDD Supply Voltage
INTERNAL REGULATORS
VCC Output Voltage
VCC Undervoltage Lockout
OUTPUT DRIVER
Peak Source Current
Peak Sink Current
NDRV High-Side Driver
Resistance
SYMBOL
IVDD(NS)
IVDD(S)
CONDITIONS
VDD = 36V, driver not switching
VDD = 36V, driver switching, VOPTO = 4V
VSS_SHDN = 0V, V+ = 67V
VSS_SHDN = 0V
VCC_UVLO
Powered from V+, ICC = 7.5mA, VDD = 0V
Powered from VDD, ICC = 7.5mA
VCC falling
ROH
VCC = 11V (externally forced)
VCC = 11V (externally forced)
VCC = 11V, externally forced, NDRV
sourcing 50mA
MIN TYP MAX UNITS
0.9
1.6
mA
1.9
3.2
180 290
µA
4
20
µA
18
67
V
13
36
V
7.5
9.8
12
V
9.0
10.0 11.0
6.6
V
570
mA
1000
mA
4
12
Ω
NDRV Low-Side Driver
Resistance
ERROR AMPLIFIER
FB Input Resistance
FB Input Bias Current
Error Amplifier Gain (Inverting)
Closed-Loop 3dB Bandwidth
FB Input Voltage Range
SLOPE COMPENSATION
Slope Compensation
THERMAL SHUTDOWN
Thermal Shutdown Temperature
Thermal Hysteresis
CURRENT LIMIT
CS Threshold Voltage
CS Input Bias Current
Current-Limit Comparator
Propagation Delay
CS Blanking Time
OSCILLATOR
Clock Frequency Range
Max Duty Cycle
ROL
VCC = 11V, externally forced, NDRV sinking
50mA
RIN
IFB
AVCL
VFB = VSS_SHDN
2
VSCOMP MAX5942A
VILIM FB = 4V
419
0V ≤ VCS ≤ 2V, FB = 4V
-1
25mV overdrive on CS, FB = V-
FB = GND, only PWM comparator is blanked
FB = V-
235
MAX5942A, FB = V-
75
MAX5942B, FB = V-
44
1.6
4
50
±1
-20
200
3
26
+150
25
465 510
+1
180
70
275 314
85
50
Ω
kΩ
µA
V/V
kHz
V
mV/µs
°C
°C
mV
µA
ns
ns
kHz
%
4 _______________________________________________________________________________________
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