參數(shù)資料
型號(hào)： 1725
廠商： Linear Technology Corporation
英文描述： General Purpose Isolated Flyback Controller
中文描述： 通用隔離反激式控制器
文件頁數(shù)： 3/28頁
文件大?。?/td> 241K
代理商： 1725
3
LT1725
1725f
Note 1:
Absolute Maximum Ratings are those values beyond which the life of
a device may be impaired.
Note 2:
Component value range guaranteed by design.
Note 3:
The V
CC
turn-on/turn-off voltages and hysteresis voltage are
proportional in magnitude to each other-guaranteed by design.
The
G
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
°
C. V
CC
= 14V, GATE open, V
C
= 1.4V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
Current Amplifier
V
C
Control Pin Threshold
Duty Cycle = Min
ELECTRICAL CHARACTERISTICS
MIN
TYP
MAX
UNITS
0.90
0.80
220
200
1.12
1.25
1.35
270
280
V
V
G
V
ISENSE
Switch Current Limit
Duty Cycle
≤
30%
Duty Cycle
≤
30%
Duty Cycle = 80%
250
mV
mV
mV
mV
G
220
0.30
V
ISENSE
/
V
C
Timing
f
Switching Frequency
C
OSCAP
= 100pF
90
80
33
100
115
125
200
kHz
kHz
pF
ns
ns
ns
k
%
G
C
OSCAP
t
ON
t
ED
t
EN
R
t
Oscillator Capacitor Value
Minimum Switch On Time
Flyback Enable Delay Time
Minimum Flyback Enable Time
Timing Resistor Value
Maximum Switch Duty Cycle
Load Compensation
Sense Offset Voltage
Current Gain Factor
UVLO Function
V
UVLO
UVLO Pin Threshold
I
UVLO
UVLO Pin Bias Current
(Note 2)
R
tON
= 50k
R
ENDLY
= 50k
R
MENAB
= 50k
(Note 2)
200
200
200
24
85
200
G
90
2
5
mV
mV
0.80
0.95
1.05
G
1.21
–0.25
–4.50
1.25
+0.1
–3.5
1.29
+0.25
–2.50
V
V
UVLO
= 1.2V
V
UVLO
= 1.3V
μ
A
μ
A
3V Output Function
V
REF
Reference Output Voltage
Output Impedance
Current Limit
I
LOAD
= 1mA
G
2.8
3.0
10
15
3.2
V
G
8
mA
相關(guān)PDF資料
PDF描述
1725I General Purpose Isolated Flyback Controller
17537-5 HTSNK B LONG .9H LOW FLOW, THRU HOLE
17537 HTSNK B LONG .9H LOW FLOW, THRU HOLE
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