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參數資料
| 型號： | 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： | 1/28頁 |
| 文件大?。?/td> | 241K |
| 代理商： | 1725 |
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1
LT1725
1725f
LT1725
3V
OUT
FB
SFST
VC
OSCAP
t
ON
ENDLY
MENAB
R
OCMP
R
CMPC
SGND
V
CC
UVLO
GATE
I
SENSE
PGND
1nF
0.1
μ
F
47pF
51k
51k
51k
2.7k
35.7k
1%
3.01k
1%
+
15
μ
F
150
μ
F
1
μ
F
1.5
μ
F
47k
820k
100pF
33k
68
150pF
22
BAS16
V
IN
36V TO 72V
+
IRF620
6
1
2
4
9
10
12
11
18
51
1W
470pF
12CWQ06
V
OUT
= 5V
I
OUT
= 0 to 2A
CTX02-14989
1725 TA01a
0.18
FEATURES
DESCRIPTIOU
The LT
1725 is a monolithic switching regulator control-
ler specifically designed for the isolated flyback topology.
It drives the gate of an external MOSFET and is generally
powered from a third transformer winding. These features
allow for an application input voltage limited only by
external power path components. The third transformer
winding also provides output voltage feedback informa-
tion, such that an optoisolator is not required. Its gate
drive capability coupled with a suitable external MOSFET
can deliver load power up to tens of watts.
The LT1725 has a number of features not found on most
other switching regulator ICs. By utilizing current mode
switching techniques, it provides excellent AC and DC line
regulation. Its unique control circuitry can maintain regu-
lation well into discontinuous mode in most applications.
Optional load compensation circuitry allows for improved
load regulation. An optional undervoltage lockout pin
halts operation when the application input voltage is too
low. An optional external capacitor implements a soft-
start function. A 3V output is available at up to several mA
for powering primary side application circuitry.
TYPICAL APPLICATIOU
APPLICATIU
General Purpose
Isolated Flyback Controller
I
Drives External Power MOSFET with External
I
SENSE
Resistor
I
Application Input Voltage Limited Only by
External Power Components
I
Senses Output Voltage Directly from Primary Side
Winding—No Optoisolator Required
I
Accurate Regulation Without User Trims
I
Regulation Maintained Well into Discontinuous Mode
I
Switching Frequency from 50kHz to 250kHz with
External Capacitor
I
Optional Load Compensation
I
Optional Undervoltage Lockout
I
Available in 16-Pin SO and SSOP Packages
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
Telecom Isolated Converters
I
Offline Isolated Power Supplies
I
Instrumentation Power Supplies
Output Load Regulation
48V to Isolated 5V Converter
I
LOAD
(A)
0
V
O
5.00
1725 F10b
4.75
0.5
1.0
1.5
2.0
5.25
V
IN
= 36V
V
IN
= 72V
V
IN
= 48V
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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 |
| 17539 | HTSNK, C LONG,. .911 LOW FLOW. THRU HOLE |
| 17539-G | SP Relay Socket |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 172-5 | 功能描述:高頻/射頻繼電器 5V DC-1GHz .15W RoHS:否 制造商:Omron Electronics 觸點形式:2 Form C (DPDT-BM) 觸點電流額定值: 線圈電壓:5 VDC 線圈類型:Non-Latching 頻率: 功耗:100 mW 端接類型:Solder Terminal 絕緣:20 dB to 30 dB at 1 GHz 介入損耗:0.2 dB at 1 GHz |
| 1725 095 2101 | 制造商:Harting Technology Group 功能描述:SOCKET FEMALE R/A TYPE B 95WAY 制造商:Harting Technology Group 功能描述:SOCKET, FEMALE, R/A, TYPE B, 95WAY 制造商:Harting Technology Group 功能描述:SOCKET, FEMALE, R/A, TYPE B, 95WAY; Series:Har-Bus; Gender:Receptacle; No. of Contacts:95; No. of Rows:5; Pitch Spacing:2mm; Connector Mounting:PCB; Contact Termination:Press Fit Right Angle; Contact Material:Copper; SVHC:No SVHC ;RoHS Compliant: Yes |
| 1725 095 2101 | 制造商:Harting Technology Group 功能描述:SOCKET BUS TYPE B FEMALE R/A 95WAY |
| 1725 095 2102 | 制造商:Harting Technology Group 功能描述:CONNECTOR TYPE B FEMALE 95WAY 制造商:Harting Technology Group 功能描述:CONNECTOR, TYPE B, FEMALE, 95WAY |
| 1725 095 2102 | 制造商:Harting Technology Group 功能描述:TYPE B FEMALE R/A 95WAY SHIELD |
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