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LM2587 bảng dữ liệu(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
tên linh kiện LM2587
Giải thích chi tiết về linh kiện  SIMPLE SWITCHER 5A Flyback Regulator
PDF  26 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
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LM2587 bảng dữ liệu(HTML) 4 Page - National Semiconductor (TI)

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LM2587-ADJ
Electrical Characteristics (Continued)
Symbol
Parameters
Conditions
Typical
Min
Max
Units
UNIQUE DEVICE PARAMETERS (Note 5)
V
REF
Output Reference
Measured at Feedback Pin
1.230
1.208/1.205
1.252/1.255
V
Voltage
V
COMP = 1.0V
∆V
REF
Reference Voltage
V
IN = 4V to 40V
1.5
mV
Line Regulation
G
M
Error Amp
I
COMP = −30 µA to +30 µA
3.200
1.800
6.000
mmho
Transconductance
V
COMP = 1.0V
A
VOL
Error Amp
V
COMP = 0.5V to 1.6V
670
400/200
V/V
Voltage Gain
R
COMP = 1.0 MΩ (Note 6)
I
B
Error Amp
V
COMP = 1.0V
125
425/600
nA
Input Bias Current
All Output Voltage Versions
Electrical Characteristics (Note 5)
Specifications with standard type face are for T
J = 25˚C, and those in bold type face apply over full Operating Temperature
Range. Unless otherwise specified, V
IN = 5V.
Symbol
Parameters
Conditions
Typical
Min
Max
Units
I
S
Input Supply Current
(Switch Off)
11
15.5/16.5
mA
(Note 8)
I
SWITCH = 3.0A
85
140
165
mA
V
UV
Input Supply
R
LOAD = 100Ω
3.30
3.05
3.75
V
Undervoltage Lockout
f
O
Oscillator Frequency
Measured at Switch Pin
R
LOAD = 100Ω
100
85/75
115/125
kHz
V
COMP = 1.0V
f
SC
Short-Circuit
Measured at Switch Pin
Frequency
R
LOAD = 100Ω
25
kHz
V
FEEDBACK = 1.15V
V
EAO
Error Amplifier
Upper Limit
2.8
2.6/2.4
V
Output Swing
(Note 7)
Lower Limit
0.25
0.40/0.55
V
(Note 8)
I
EAO
Error Amp
(Note 9)
Output Current
165
110/70
260/320
µA
(Source or Sink)
I
SS
Soft Start Current
V
FEEDBACK = 0.92V
11.0
8.0/7.0
17.0/19.0
µA
V
COMP = 1.0V
D
Maximum Duty Cycle
R
LOAD = 100Ω
98
93/90
%
(Note 7)
I
L
Switch Leakage
Switch Off
15
300/600
µA
Current
V
SWITCH = 60V
V
SUS
Switch Sustaining
dV/dT = 1.5V/ns
65
V
Voltage
V
SAT
Switch Saturation
I
SWITCH = 5.0A
0.7
1.1/1.4
V
Voltage
I
CL
NPN Switch
6.5
5.0
9.5
A
Current Limit
www.national.com
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