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LM2588T-5 Fiches technique(PDF) 8 Page - Texas Instruments

No de pièce LM2588T-5
Description  LM2588 SIMPLE SWITCHER 5A Flyback Regulator with Shutdown
Download  38 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM2588T-5 Fiches technique(HTML) 8 Page - Texas Instruments

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LM2588
SNVS117D – APRIL 1998 – REVISED APRIL 2013
www.ti.com
All Output Voltage Versions Electrical Characteristics
(1) (continued)
Specifications with standard type face are for TJ = 25°C, and those in bold type face apply over full Operating Temperature
Range. Unless otherwise specified, VIN = 5V.
Symbol
Parameters
Conditions
Typical
Min
Max
Units
IEAO
Error Amp Output
See(4)
165
110/70
260/320
μA
Current (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
(3)
98
93/90
%
IL
Switch Leakage
Switch Off
15
300/600
μA
Current
VSWITCH = 60V
VSUS
Switch Sustaining
dV/dT = 1.5V/ns
65
V
Voltage
VSAT
Switch Saturation
ISWITCH = 5.0A
0.7
1.1/1.4
V
Voltage
ICL
NPN Switch Current
6.5
5.0
9.5
A
Limit
VSTH
Synchronization
FSYNC = 200 kHz
0.75
0.625/0.40
0.875/1.00
V
Threshold Voltage
VCOMP = 1V, VIN = 5V
ISYNC
Synchronization
VIN = 5V
100
200
μA
Pin Current
VCOMP = 1V, VSYNC = VSTH
VSHTH
ON /OFF Pin (Pin 1)
VCOMP = 1V
(5)
1.6
1.0/0.8
2.2/2.4
V
Threshold Voltage
ISH
ON /OFF Pin (Pin 1)
VCOMP = 1V
40
15/10
65/75
μA
Current
VSH = VSHTH
θJA
Thermal Resistance
NDZ Package, Junction to Ambient(6)
65
θJA
NDZ Package, Junction to Ambient(7)
45
θJC
NDZ Package, Junction to Case
2
θJA
KTW Package, Junction to Ambient(8)
56
°C/W
θJA
KTW Package, Junction to Ambient(9)
35
θJA
KTW Package, Junction to
26
θJC
Ambient(10)
2
KTW Package, Junction to Case
(4)
To measure the worst-case error amplifier output current, the LM2588 is tested with the feedback voltage set to its low value (specified
in Note 3 under the All Output Voltage Versions Electrical Characteristics() table) and at its high value (specified in Note 2 under the All
Output Voltage Versions Electrical Characteristics() table).
(5)
When testing the minimum value, do not sink current from this pin—isolate it with a diode. If current is drawn from this pin, the frequency
adjust circuit will begin operation (see Figure 54).
(6)
Junction to ambient thermal resistance (no external heat sink) for the 7 lead TO-220 package mounted vertically, with ½ inch leads in a
socket, or on a PC board with minimum copper area.
(7)
Junction to ambient thermal resistance (no external heat sink) for the 7 lead TO-220 package mounted vertically, with ½ inch leads
soldered to a PC board containing approximately 4 square inches of (1 oz.) copper area surrounding the leads.
(8)
Junction to ambient thermal resistance for the 7 lead TO-263 mounted horizontally against a PC board area of 0.136 square inches (the
same size as the TO-263 package) of 1 oz. (0.0014 in. thick) copper.
(9)
Junction to ambient thermal resistance01242001 for the 7 lead TO-263 mounted horizontally against a PC board area of 0.4896 square
inches (3.6 times the area of the TO-263 package) of 1 oz. (0.0014 in. thick) copper.
(10) Junction to ambient thermal resistance for the 7 lead TO-263 mounted horizontally against a PC board copper area of 1.0064 square
inches (7.4 times the area of the TO-263 package) of 1 oz. (0.0014 in. thick) copper. Additional copper area will reduce thermal
resistance further. See the thermal model in Switchers Made Simple® software.
8
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