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LM3101 数据表(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM3101
功能描述  Secondary-Side PWM Controller
PDF  20 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM3101 数据表(HTML) 3 Page - National Semiconductor (TI)

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Electrical Characteristics Specifications with standard typeface are for TJ e 25 C and those in bold type-
face apply over full Operating Temperature Range Pin 2 MC is connected to VS bya5kX resistorthis selects voltage
mode control operation Unless otherwise specified TA e 25 C VS e 5V RFS e 25 kX (FO e 500 kHz) (Continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
PULSE WIDTH MODULATOR SECTION
DMAX
Maximum Duty Cycle
FO e 500 kHz
88
92
%
84
FO e 1 MHz
84
90
%
80
DMIN
Minimum Duty Cycle
FO e 500 kHz
25
6
%
(Note 8)
8
FO e 1 MHz
4
10
%
12
tdCS
Current Sense Time Delay
75
100
ns
OUTPUT SECTION
tR
Rise Time
CL e 100 pF
20
ns
tF
Fall Time
CL e 100 pF
30
ns
VOL
Output Voltage
IL e 4 mA Sinking
13
14
V
FO e 100 kHz
16
VOH
Output Voltage
IL e 4 mA Sourcing
36
38
V
FO e 100 kHz
34
OVER-VOLTAGE CROWBAR TRIGGER SECTION
%VTHC
Relative Trigger
Relative to Nominal Feedback
18
20
22
%
Threshold
Pin Voltage (Note 10)
16
24
ICD
Crowbar Driver
RCD e 10X
170
240
mA
Output Current
tCD
Crowbar Delay
RCD e 10X VCD e 1V
400
ns
tC
Minimum Trigger Pulse Width
(Note 11)
400
ns
POWER-ON RESET FLAG SECTION
%VTHP
Relative POR Trigger
Relative to Nominal
b
6
b
45
b
3
%
Threshold
Feedback Pin Voltage (Note 10)
b
65
b
25
VPOR
POR Output Voltage
VFB e 111V
02
05
V
IPOR e 16 mA
VSM
Minimum Supply Voltage
VPOR s 05V
1
12
V
(Note 12)
IPOR e 16 mA
tDR
Power-On Reset Delay
CRD e 2 nF
65
120
185
m
s
50
265
UNDER-VOLTAGE LOCKOUT SECTION
VUV
Start-Up Threshold
(Note 13)
365
392
420
V
VUVH
Threshold Hysteresis
300
mV
SUPPLY SECTION
IS
Supply Current
VS e 5V
11
16
mA
20
45V s VS s 15V
15
24
mA
28
ISFST
Soft-Start Current (Note 14)
VSFST e 0V
145
195
205
m
A
3



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