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參數(shù)資料
| 型號： | LT1737 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | High Power Switching Regulator for Isolated Flyback Controller(大功率，用于隔離回掃控制器的開關(guān)穩(wěn)壓器) |
| 中文描述： | 大功率開關(guān)穩(wěn)壓器（大功率，用于隔離回掃控制器的開關(guān)穩(wěn)壓器的隔離反激式控制器） |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 294K |
| 代理商： | LT1737 |
1
LT1737
High Power
Isolated Flyback Controller
November 2000
The LT
1737 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 DC supply voltage. Output voltage feed-
back information may be supplied by a variety of methods
including a third transformer winding, the primary wind-
ing or even direct DC feedback (see Applications Informa-
tion). Its gate drive capability coupled with a suitable
external MOSFET and other power path components can
deliver load power up to tens of Watts.
The LT1737 has a number of features not found on other
isolated flyback controller ICs presently available. By
utilizing current mode switching techniques, it provides
excellent AC and DC line regulation. Its unique control
circuitry can maintain regulation 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 appli-
cation input voltage is too low. An optional external
capacitor implements a soft-start function.
I
Drives External Power MOSFET with External
I
SENSE
Resistor
I
Supply Voltage Range: 4.5V to 20V
I
Flyback Voltage Limited Only by
External Components
I
Senses Output Voltage Directly from Primary Side
Winding—No Optoisolator Required
I
Moderate Accuracy Regulation Without User Trims
I
Regulation Maintained Well into Discontinuous Mode
I
Switching Frequency from 50kHz to 250kHz
with External Capacitor
I
Available in 16-Pin GN and SO Packages
I
Optional Load Compensation
I
Optional Undervoltage Lockout
I
SHDN Pin Reduces I
Q
to 50
μ
A Typ
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
Isolated Flyback Switching Regulators
I
Medical Instruments
I
Instrumentation Power Supplies
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Final Electrical Specifications
FEATURES
DESCRIPTIOU
APPLICATIU
12V-18V to Isolated 15V Converter
SW
W
PGND
I
SENSE
GATE
V
C
OSCAP t
ON
FB
R1
0.27
M1
IRFL014
T1
COILTRONICS
CTX150-4
V
IN
V
CC
UVLO
SGND
1737 TA01
R
CMPC
R
OCMP
MINENAB
LT1737
ENDLY
R3
3.01k
1%
C3
0.1
μ
F
D1
MBRS1100
C2
33
μ
F
+
R4
7.5k
V
OUT
D2
BAS16
Q1
2N3906
R2
35.7k
1%
C1
22
μ
F
150
μ
H
150
μ
H
+
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|---|---|
| LT1737CGN | 功能描述:IC REG CTRLR FLYBK ISO CM 16SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT1737CGN#PBF | 功能描述:IC REG CTRLR FLYBK ISO CM 16SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT1737CGN#PBF | 制造商:Linear Technology 功能描述:IC SMPS CONTROLLER CURRENT-MODE SSOP |
| LT1737CGN#TR | 功能描述:IC REG CTRLR FLYBK ISO CM 16SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT1737CGN#TRPBF | 功能描述:IC REG CTRLR FLYBK ISO CM 16SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
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