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LT4430ES6 Datasheet

  • LT4430ES6

  • Secondary-Side Optocoupler Driver

  • 2119.20KB

  • 20頁

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LT4430
Secondary-Side
Optocoupler Driver
FEATURES
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DESCRIPTIO
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600mV Reference (1.25% Over Temperature)
Wide Input Supply Range: 3V to 20V
Overshoot Control Function Prevents Output
Overshoot on Startup and Short-Circuit Recovery
High Bandwidth Error Ampli鏗乪r Permits Simple Loop
Frequency Compensation
Ground-Referenced OptoCoupler Drive
10mA OptoCoupler Drive with Current Limiting
Low Pro鏗乴e (1mm) ThinSOT
TM
Package
The LT
廬
4430 drives the optocoupler that crosses the
galvanic barrier in an isolated power supply. The IC con-
tains a precision-trimmed reference, a high bandwidth
error ampli鏗乪r, an inverting gain of 6 stage to drive the
optocoupler and unique overshoot control circuitry.
The LT4430鈥檚 600mV reference provides 鹵0.75% initial
accuracy and 鹵1.25% tolerance over temperature. A high
bandwidth 9MHz error ampli鏗乪r permits simple frequency
compensation and negligible phase shift at typical loop
crossover frequencies. The optocoupler driver provides
10mA of output current and is short-circuit protected.
A unique overshoot control function prevents output
overshoot on startup and short-circuit recovery with a
single capacitor.
The LT4430 is available in the low pro鏗乴e 6-lead SOT-23
package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
APPLICATIO S
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48V Input Isolated DC/DC Converters
Isolated Telecommunication Power Systems
Distributed Power Step-Down Converters
Of鏗俰ne Isolated Power Supplies
Industrial Control Systems
Automotive and Heavy Equipment
TYPICAL APPLICATIO
ISOLATION
BARRIER
V
IN
Simpli鏗乪d Isolated Synchronous Forward Converter
Isolated Flyback Telecom Converter
Startup with Overshoot Control
(See Schematic on Page 20)
V
IN
50V/DIV
LT1952
FG
CG
SYNC
LTC3900
V
CC
+
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+
V
OUT
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V
CC
V
IN
GND
OC
LT4430
OPTO
COMP
FB
V
OUT
5V/DIV
OVERSHOOT CONTROL
IMPLEMENTED
t = 5ms/DIV
4430 TA01b
4430 TA01
U
4430f
U
U
1

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    UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
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    UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
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    UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
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  • 英文版
    UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
    ETC [ETC]
  • 英文版
    UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
    ETC
  • 英文版
    UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
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  • 英文版
    Secondary-Side Optocoupler Driver
    LINER
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    Secondary-Side Optocoupler Driver
    LINER [Lin...
  • 英文版
    Secondary-Side Optocoupler Driver
    LINER
  • 英文版
    Secondary-Side Optocoupler Driver
    LINER [Lin...
  • 英文版
    LT4430 - Secondary-Side Optocoupler Driver; Package: SOT; Pi...
    LINER
  • 英文版
    LT4430 - Secondary-Side Optocoupler Driver; Package: SOT; Pi...
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