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LM5041AMTC/NOPB датащи(PDF) 6 Page - Texas Instruments

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номер детали LM5041AMTC/NOPB
подробное описание детали  LM5041A Cascaded PWM Controller
PDF  22 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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LM5041AMTC/NOPB датащи(HTML) 6 Page - Texas Instruments

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LM5041A
SNVS350B – MARCH 2005 – REVISED MARCH 2013
www.ti.com
Electrical Characteristics (continued)
Specifications with standard typeface are for TJ = 25°C, and those with boldface type apply over full Operating Junction
Temperature range. VIN = 48V, VCC = 10V, RT = 26.7kΩ, RSET = 20kΩ) unless otherwise stated
(1)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Reference Supply
VREF
Ref Voltage
IREF = 0 mA
4.85
5
5.15
V
Ref Voltage Regulation
IREF = 0 to 10mA
25
50
mV
Ref Current Limit
15
20
mA
Current Limit
CS Step from 0 to 0.6V
ILIM Delay to Output
Time to Onset of OUT
40
ns
Transition (90%), CL = 0
Cycle by Cycle Threshold
0.45
0.5
0.55
V
Voltage
Leading Edge Blanking
50
ns
Time
CS Sink Current (clocked) CS = 0.3V
2
5
mA
Soft-Start
Soft-start Current Source
7
10
13
µA
Soft-start to COMP Offset
0.35
0.55
0.75
V
Oscillator
Frequency1
180
200
220
TJ = 25°C
kHz
(RT = 26.7K
Ω)
175
225
Frequency2
515
600
685
kHz
(RT = 7.87K
Ω)
Sync threshold
3
3.5
V
PWM Comparator
COMP set to 2V CS stepped
Delay to Output
0 to 0.4V, Time to onset of
25
ns
OUT transition low
Max Duty Cycle
TS = Oscillator Period
(Ts-240ns)/Ts)
%
Min Duty Cycle
COMP = 0V
0
%
COMP to PWM
0.32
Comparator Gain
COMP Open Circuit
FB = 0V
4.1
4.8
5.5
V
Voltage
COMP Short Circuit
FB = 0V, COMP = 0V
0.6
1
1.4
mA
Current
Slope Compensation
Delta increase at PWM
Slope Comp Amplitude
110
mV
Comparator to CS
UVLO Shutdown
Under-voltage Shutdown
2.44
2.5
2.56
V
Under-voltage Shutdown
Hysteresis Current
16
20
24
µA
Source
6
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Copyright © 2005–2013, Texas Instruments Incorporated
Product Folder Links: LM5041A



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