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参数资料
| 型号： | LT1737IS |
| 厂商： | Linear Technology |
| 文件页数： | 1/28页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBK ISO CM 16SOIC |
| 标准包装： | 50 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 125kHz |
| 占空比： | 90% |
| 电源电压： | 4.1 V ~ 20 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
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LT1737
High Power
Isolated Flyback Controller
FEATURES
DESCRIPTIO
■
■
■
■
■
■
■
■
■
■
■
■
Drives External Power MOSFET
Supply Voltage Range: 4.5V to 20V
Flyback Voltage Limited Only by
External Components
Senses Output Voltage Directly from Primary Side
Winding—No Optoisolator Required
Switching Frequency from 50kHz to 250kHz
with External Capacitor
Moderate Accuracy Regulation Without User Trims
Regulation Maintained Well into Discontinuous Mode
External I SENSE Resistor
Optional Load Compensation
Optional Undervoltage Lockout
Shutdown Feature Reduces I Q to 50 μ A Typ
Available in 16-Pin GN and SO Packages
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. 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
APPLICATIO S
■ Isolated Flyback Switching Regulators
■ Medical Instruments
■ Instrumentation Power Supplies
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
12V-18V to Isolated 15V Converter
R2
35.7k
V IN
D1
MBRS1100
+
Q1
2N3906
D2
BAS16
1%
240k
33k
C3
0.1 μ F
C1
22 μ F
+
T1
COILTRONICS
CTX150-4
?
150 μ H 150 μ H
?
C2
33 μ F
V OUT = 15V
I OUT = 300mA
R4
7.5k
FB
UVLO
LT1737
V CC
GATE
M1
IRFL014
V C
I SENSE
R3
3.01k
1%
1nF
OSCAP
47pF
t ON ENDLY MINENAB R OCMP
75k 150k 100k 4.7k
R CMPC SGND
0.1 μ F
PGND
R1
0.27 ?
NOTE: SEE APPLICATIONS
INFORMATION FOR ADDITIONAL
COMPONENT SPECIFICATIONS
1737 TA01
1737fa
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1737IS#PBF | 功能描述:IC REG CTRLR FLYBK ISO CM 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT1737IS#PBF | 制造商:Linear Technology 功能描述:ICSMPS CONTROLLERCURRENT-MOD 制造商:Linear Technology 功能描述:IC,SMPS CONTROLLER,CURRENT-MODE,SOP,16PI |
| LT1737IS#TR | 功能描述:IC REG CTRLR FLYBK ISO CM 16SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT1737IS#TRPBF | 功能描述:IC REG CTRLR FLYBK ISO CM 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT1738 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Slew Rate Controlled Ultralow Noise DC/DC Controller |
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