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LTC3706IGN Scheda tecnica(PDF) 3 Page - Linear Technology

Il numero della parte LTC3706IGN
Spiegazioni elettronici  Secondary-Side Synchronous Forward Controller with PolyPhase Capability
PDF  20 Pages
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Produttore elettronici  LINER [Linear Technology]
Homepage  http://www.linear.com
Logo LINER - Linear Technology

LTC3706IGN Scheda tecnica(HTML) 3 Page - Linear Technology

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LTC3706
3
3706fb
ELECTRICAL CHARACTERISTICS The l indicates specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 7V, VIN = 15V, GND = PGND = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Main Control Loop
VFB
Regulated Feedback Voltage
(Note 4) ITH = 1.2V
l
0.594
0.600
0.606
V
IFB
Feedback Input Current
(Note 4)
2
100
nA
ΔVFB(LINREG)
Feedback Voltage Line Regulation
VIN = 6V to 30V, ITH = 1.2V
0.001
%/V
ΔVFB(LOADREG)
Feedback Voltage Load Regulation
Measured in Servo Loop,
ITH = 0.5V to 2V
l
–0.01
–0.1
%
VISMAX
Maximum Current Sense Threshold
RSENSE Mode, 0V < VIS– < 5V
VIS– = VCC, 0V < VIS+ < 2V (CT Mode)
68
1.15
78
1.28
88
1.4
mV
V
VISOC
Over-Current Shutdown Threshold
RSENSE Mode, 0V < VIS– < 5V
VIS– = VCC, 0V < VIS+ < 2V (CT Mode)
87
1.45
100
1.65
113
1.85
mV
V
gm
Transconductance Amplifier gm
2.40
2.75
3.10
mS
IRUN/SS(C)
Soft-Start Charge Current
VRUN/SS = 2V
–4
–5
–6
μA
IRUN/SS(D)
Soft-Start Discharge Current
3
μA
VRUN/SS
RUN/SS Pin ON Threshold
VRUN/SS Rising
l
0.4
0.45
0.5
V
tON,MIN
Minimum ON Time
200
ns
FG, SG RUP
FG, SG Driver Pull-Up On Resistance
FG, SG Low
1.5
2.3
Ω
FG, SG RDOWN
FG, SG Driver Pull-Down On Resistance
FG, SG High
1.5
2.3
Ω
PT+, PT– RUP
PT+, PT– Driver Pull-Up Resistance
PT+, PT– Low
1.5
2.3
Ω
PT+, PT– RDOWN
PT+, PT– Driver Pull-Down Resistance
PT+, PT– High
1.5
2.3
Ω
ΔVFB(OV)
Output Overvoltage Threshold
VFB Rising
15
17
19
%
VCC Supply
VCCOP
Operating Voltage Range
5
10
V
VCCREG
Regulated Output Voltage
6.6
7.0
7.4
V
ICC
Supply Current
Operating
Shutdown
fOSC = 200kHz (Note 5)
VRUN/SS = GND
4.2
240
mA
μA
VUVLO
UV Lockout
VCC Rising
l
4.52
4.60
4.70
V
VHYS
UV Hysteresis
0.4
V
VIN Supply
VINOP
Operating Voltage Range
5
30
V
IIN
Supply Current
Normal Mode
Shutdown
fOSC = 200kHz
VRUN/SS = GND
900
460
μA
μA
VINUVLO
UV Lockout
VIN Rising
l
3.90
4.30
4.51
V
VINHYS
0.2
V
VREGSD
REGSD Shutdown Threshold
VREGSD Rising
4
V
gm,REGSD
REGSD Transconductance
5
μS



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