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LT1725IGN 数据表(PDF) 2 Page - Linear Technology

部件名 LT1725IGN
功能描述  General Purpose Isolated Flyback Controller
PDF  28 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LT1725IGN 数据表(HTML) 2 Page - Linear Technology

  LT1725IGN Datasheet HTML 1Page - Linear Technology LT1725IGN Datasheet HTML 2Page - Linear Technology LT1725IGN Datasheet HTML 3Page - Linear Technology LT1725IGN Datasheet HTML 4Page - Linear Technology LT1725IGN Datasheet HTML 5Page - Linear Technology LT1725IGN Datasheet HTML 6Page - Linear Technology LT1725IGN Datasheet HTML 7Page - Linear Technology LT1725IGN Datasheet HTML 8Page - Linear Technology LT1725IGN Datasheet HTML 9Page - Linear Technology Next Button
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2
LT1725
1725f
(Note 1)
VCC Supply Voltage ................................................. 22V
UVLO Pin Voltage .................................................... VCC
ISENSE Pin Voltage .................................................... 2V
FB Pin Current .....................................................
±2mA
Operating Junction
Temperature Range
LT1725C .............................................. 0
°C to 100°C
LT1725I ........................................... –40
°C TO 125°C
Storage Temperature Range ................ – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec)................ 300
°C
ORDER PART
NUMBER
LT1725CGN
LT1725CS
LT1725IGN
LT1725IS
TJMAX = 125°C, θJA = 110°C/W (GN)
TJMAX = 125°C, θJA = 100°C/W (SO)
PACKAGE/ORDER I FOR ATIO
ABSOLUTE
AXI U
RATI GS
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
GN PACKAGE
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
PGND
ISENSE
SFST
ROCMP
RCMPC
OSCAP
VC
FB
GATE
VCC
tON
ENDLY
MINENAB
SGND
UVLO
3VOUT
The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 14V, GATE open, VC = 1.4V unless otherwise noted.
ELECTRICAL CHARACTERISTICS
Consult LTC Marketing for parts specified with wider operating temperature ranges.
GN PART
MARKING
1725
1725I
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Power Supply
VCC
VCC Turn-On Voltage
q
14.0
15.1
16.0
V
VCC Turn-Off Voltage
q
8
9.7
11
V
VCC Hysteresis (Note 3)
(VTURN-ON – VTURN-OFF)
q
4.0
5.4
6.5
V
ICC
Supply Current
VC = Open
q
610
15
mA
Start-Up Current
q
120
280
µA
Feedback Amplifier
VFB
Feedback Voltage
1.230
1.245
1.260
V
q
1.220
1.270
V
IFB
Feedback Pin Input Current
500
nA
gm
Feedback Amplifier Transconductance
∆lC = ±10µA
q
400
1000
1800
µmho
ISRC, ISNK
Feedback Amplifier Source or Sink Current
q
30
50
80
µA
VCL
Feedback Amplifier Clamp Voltage
2.5
V
Reference Voltage/Current Line Regulation
12V
≤ VIN ≤ 18V
q
0.01
0.05
%/V
Voltage Gain
VC = 1V to 2V
2000
V/V
Soft-Start Charging Current
VSFST = 0V
25
40
50
µA
Soft-Start Discharge Current
VSFST = 1.5V, VUVLO = 0V
0.8
1.5
mA
Gate Output
VGATE
Output High Level
IGATE = 100mA
q
11.5
12.1
V
IGATE = 500mA
q
11.0
11.8
V
Output Low Level
IGATE = 100mA
q
0.3
0.45
V
IGATE = 500mA
q
0.6
1.0
V
IGATE
Output Sink Current in Shutdown, VUVLO = 0V
VGATE = 2V
q
1.2
2.5
mA
tr
Rise Time
CL = 1000pF
30
ns
tf
Fall Time
CL = 1000pF
30
ns



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