参数资料
型号: LT1424CN8-9#PBF
厂商: Linear Technology
文件页数: 1/16页
文件大小: 0K
描述: IC REG FLYBACK ISOLATED 9V 8DIP
标准包装: 50
类型: 回扫,隔离
输出类型: 固定
输出数: 1
输出电压: 9V
输入电压: 2.8 V ~ 20 V
PWM 型: 电流模式
频率 - 开关: 285kHz
电流 - 输出: 200mA
同步整流器:
工作温度: 0°C ~ 125°C
安装类型: 通孔
封装/外壳: 8-DIP(0.300",7.62mm)
包装: 管件
供应商设备封装: 8-PDIP
LT1424-9
Isolated Flyback
Switching Regulator
with 9V Output
FEATURES
DESCRIPTIO
s
s
s
s
s
s
s
No Transformer “Third Winding” or Optoisolator
Required
Application Circuit Meets PCMCIA Type II
Height Requirement
Fixed, Application Specific 9V Output Voltage
Regulation Maintained Well into Discontinuous
Mode (Light Load)
Load Compensation Provides Excellent
Load Regulation
Available in 8-Pin PDIP and SO Packages
Operating Frequency: 285kHz
The LT ? 1424-9 is a monolithic high power switching
regulator specifically designed for the isolated flyback
topology. No “third winding” or optoisolator is required;
the integrated circuit senses the isolated output voltage
directly from the primary side flyback waveform. A high
current, high efficiency switch is included on the die along
with all oscillator, control and protection circuitry.
The LT1424-9 operates with input supply voltages from
3V to 20V and draws only 7mA quiescent current. It can
deliver up to 200mA at 9V with no external power devices.
By utilizing current mode switching techniques, it pro-
APPLICATIO S
vides excellent AC and DC line regulation.
The LT1424-9 has a number of features not found on other
s
Ethernet Isolated 5V to – 9V Converter
switching regulator ICs. Its unique control circuitry can
maintain regulation well into discontinuous mode. Load
compensation circuitry allows for improved load regula-
tion. An externally activated shutdown mode reduces total
supply current to 20 μ A typical for standby operation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
– 9V PCMCIA Type II Isolated LAN Supply
(2.41mm Maximum Component Height)
5V
ISOLATION
BARRIER
R2
75 ?
C6
220pF
R1
3
1.8k
MBR0540T4
4
1:1
INPUT
COM
C1
10 μ F
25V
C2
10 μ F
25V
100k
1000pF
0.1 μ F
47pF
2
1
3
4
LT1424-9
V C R CCOMP
SHDN V IN
SYNC V SW
SGND PGND
8
7
6
5
0.1 μ F
D1
MBRS130LT3
1N5248 75 ?
C5 1
220pF C3 C4
D2 T1 10 μ F 10 μ F
25V 25V
2
1424 TA01
C1, C2, C3, C4: MARCON THCS50E1E106Z CERAMIC
CAPACITOR, SIZE 1812. (847) 696-2000
T1: COILTRONICS CTX02-13483
OUT
COM
–9V
200mA
sn14249 14249fs
1
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