lm5072mhx-80 National Semiconductor Corporation, lm5072mhx-80 Datasheet - Page 5

• Manufacturer Part Number: lm5072mhx-80
• Description: Integrated 100v Power Over Ethernet Pd Interface And Pwm Controller With Aux Support
• Manufacturer: National Semiconductor Corporation

Auxiliary Power Option
VCC Regulator
Error Amplifier
Current Limit
Soft-start
Oscillator
PWM Comparator
Slope Compensation (LM5072-80 Device Only)
Output Section
PDI Thermal Shutdown (Note 5)
Symbol
VccReg
t
t
r
f
ICL_FAUX Threshold
ICL_FAUX Pull Down Current
RAUX Lower Threshold (I = 22 µA)
RAUX Lower Threshold Hysteresis
RAUX Upper Threshold (I = 250 µA)
RAUX Lower Threshold Current
RAUX Upper Threshold Current
VCC Regulation (VccReg)
VCC Current Limit
VCC UVLO (Rising)
VCC UVLO (Falling)
VIN Supply Current
Supply Current (Icc)
VCC Regulator Dropout
Gain Bandwidth
DC Gain
Input Voltage
COMP Sink Capability
ILIM Delay to Output
Cycle by Cycle Current Limit Threshold
Voltage
Leading Edge Blanking Time
CS Sink Impedance (clocked)
Soft-start Current Source
Frequency1 (R
Frequency2 (R
Sync threshold
Delay to Output
Min Duty Cycle
Max Duty Cycle (-80 Device)
Max Duty Cycle (-50 Device)
COMP to PWM Comparator Gain
COMP Open Circuit Voltage
COMP Short Circuit Current
Slope Comp Amplitude
Output High Saturation
Output Low Saturation
Rise time
Fall time
T
T
Parameter
= 26.1 kΩ)
= 8.7 kΩ)
ICL_FAUX Pin Rising
RAUX Pin Rising
RAUX Pin Rising
V
V
V
C
C
CC
CC
IN
LOAD
LOAD
– V
= 10V
= 10V
5
= 1nF
= 1nF
CC
Conditions
(Note 6)
– 210 mV
VccReg
1.225
0.45
Min
187
175
515
8.1
2.3
5.4
7.4
5.9
2.6
4.3
0.6
16
15
75
47
70
5
8
– 100 mV
VccReg
0.33
0.25
0.25
Typ
250
200
580
8.7
2.5
0.8
6.0
7.7
6.2
0.5
3.2
5.2
1.0
50
22
67
10
30
65
35
10
25
80
50
90
18
15
3
1.275
Max
0.55
0.75
0.75
313
225
645
110
9.3
3.0
6.9
6.5
2.0
6.5
3.8
6.1
1.4
28
55
12
85
53
8
3
0
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Units
MHz
KHz
KHz
mA
mV
mA
mA
mA
mA
mV
µA
µA
µA
dB
µA
ns
ns
ns
ns
ns
%
%
%
Ω
V
V
V
V
V
V
V
V
V
V
V
V
V