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LM2586SX-ADJ Fiches technique(PDF) 5 Page - Texas Instruments

No de pièce LM2586SX-ADJ
Description  LM2586 SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
Download  38 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

LM2586SX-ADJ Fiches technique(HTML) 5 Page - Texas Instruments

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LM2586
www.ti.com
SNVS121D – MAY 1996 – REVISED APRIL 2013
LM2586-ADJ
Symbol
Parameters
Conditions
Typical
Min
Max
Units
SYSTEM PARAMETERS Test Circuit of Figure 21 (1)
VOUT
Output Voltage
VIN = 4V to 10V
12.0
11.52/11.40
12.48/12.60
V
ILOAD = 0.2A to 0.8A
ΔVOUT/
Line Regulation
VIN = 4V to 10V
20
100/200
mV
ΔVIN
ILOAD = 0.2A
ΔVOUT/
Load Regulation
VIN = 10V
20
100/200
mV
ΔILOAD
ILOAD = 0.2A to 0.8A
η
Efficiency
VIN = 10V, ILOAD = 0.6A
93
%
UNIQUE DEVICE PARAMETERS (2)
VREF
Output Reference
Measured at Feedback Pin
1.230
1.208/1.205
1.252/1.255
V
Voltage
VCOMP = 1.0V
ΔVREF
Reference Voltage
VIN = 4V to 40V
1.5
mV
Line Regulation
GM
Error Amp
ICOMP = −30 μA to +30 μA
3.200
1.800
6.000
mmho
Transconductance
VCOMP = 1.0V
AVOL
Error Amp Voltage Gain
VCOMP = 0.5V to 1.6V,
670
400/200
V/V
RCOMP = 1.0 MΩ
(3)
IB
Error Amp
VCOMP = 1.0V
125
425/600
nA
Input Bias Current
COMMON DEVICE PARAMETERS for all versions (2)
IS
Input Supply Current
Switch Off (4)
11
15.5/16.5
mA
ISWITCH = 1.8A
50
100/115
mA
IS/D
Shutdown Input
VSH = 3V
16
100/300
μA
Supply Current
VUV
Input Supply
RLOAD = 100Ω
3.30
3.05
3.75
V
Undervoltage Lockout
fO
Oscillator Frequency
Measured at Switch Pin
RLOAD = 100Ω, VCOMP = 1.0V
100
85/75
115/125
kHz
Freq. Adj. Pin Open (Pin 1)
RSET = 22 kΩ
200
kHz
fSC
Short-Circuit
Measured at Switch Pin
Frequency
RLOAD = 100Ω
25
kHz
VFEEDBACK = 1.15V
VEAO
Error Amplifier
Upper Limit (5)
2.8
2.6/2.4
V
Output Swing
Lower Limit (4)
0.25
0.40/0.55
V
IEAO
Error Amp
See (6)
Output Current
165
110/70
260/320
μA
(Source or Sink)
ISS
Soft Start Current
VFEEDBACK = 0.92V
11.0
8.0/7.0
17.0/19.0
μA
VCOMP = 1.0V
DMAX
Maximum Duty Cycle
RLOAD = 100Ω
(5)
98
93/90
%
IL
Switch Leakage
Switch Off
15
300/600
μA
Current
VSWITCH = 60V
VSUS
Switch Sustaining Voltage
dV/dT = 1.5V/ns
65
V
VSAT
Switch Saturation Voltage
ISWITCH = 3.0A
0.45
0.65/0.9
V
(1)
External components such as the diode, inductor, input and output capacitors can affect switching regulator performance. When the
LM2586 is used as shown in Figure 20 and Figure 21, system performance will be as specified by the system parameters.
(2)
All room temperature limits are 100% production tested, and all limits at temperature extremes are specified via correlation using
standard Statistical Quality Control (SQC) methods.
(3)
A 1.0 M
Ω resistor is connected to the compensation pin (which is the error amplifier output) to ensure accuracy in measuring AVOL.
(4)
To measure this parameter, the feedback voltage is set to a high value, depending on the output version of the device, to force the error
amplifier output low and the switch off.
(5)
To measure this parameter, the feedback voltage is set to a low value, depending on the output version of the device, to force the error
amplifier output high and the switch on.
(6)
To measure the worst-case error amplifier output current, the LM2586 is tested with the feedback voltage set to its low value (Note 4)
and at its high value (Note 5).
Copyright © 1996–2013, Texas Instruments Incorporated
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