LTC1698IGN datasheet(1/24 Pages) LINER

부품명	LTC1698IGN

상세설명	Isolated Secondary Synchronous Rectifier Controller

PDF	24 Pages

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제조업체	LINER [Linear Technology]

홈페이지	http://www.linear.com

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1

LTC1698

1698f

APPLICATIO S

DESCRIPTIO

FEATURES

TYPICAL APPLICATIO

The LTC

®1698 is a precision secondary-side forward

converter controller that synchronously drives external

N-channel MOSFETs. It is designed for use with the

LT

®3781 primary-side synchronous forward converter

controller to create a completely isolated power supply.

The LT3781 synchronizes the LTC1698 through a small

pulse transformer and the LTC1698 drives a feedback

optocoupler to close the feedback loop. Output accuracy

of

±0.8% and high efficiency over a wide range of load

currents are obtained.

The LTC1698 provides accurate secondary-side current

limit using an external current sense resistor. The input

voltage at the MARGIN pin provides

±5% output voltage

adjustment. A power good flag and overvoltage input are

provided to ensure proper power supply conditions. An

auxiliary 3.3V logic supply is included that supplies up to

10mA of output current.

Isolated Secondary

Synchronous Rectifier Controller

s

High Efficiency Over Wide Load Current Range

s

±0.8% Output Voltage Accuracy

s

Dual N-Channel MOSFET Synchronous Drivers

s

Pulse Transformer Synchronization

s

Optocoupler Feedback Driver

s

Programmable Current Limit Protection

s

±5% Margin Output Voltage Adjustment

s

Adjustable Overvoltage Fault Protection

s

Power Good Flag

s

Auxiliary 3.3V Logic Supply

s

Available in 16-Lead SSOP and SO Packages

s

48V Input Isolated DC/DC Converters

s

Isolated Telecommunication Power Systems

s

Distributed Power Step-Down Converters

s

Industrial Control Systems

s

Automotive and Heavy Equipment

Figure 1. Simplified 2-Transistor Isolated Forward Converter

, LTC and LT are registered trademarks of Linear Technology Corporation.

+

CG

VDD

PWRGD

LTC1698

PGND

GND

28

CFB

CC

CCILM

RC

VOUT

RCILM

R2

R5

R4

R1

L1

6

13

9

7

14

COUT

110

Q4

VIN

36V to 72V

Q3

T1

Q1

D1

Q2

RPRISEN

T2

FG

16

ISNS

RSECSEN

12

ISNSGND

11

SYNC

VFB

VCOMP

VAUX

ICOMP

OVPIN

MARGIN

VMARGIN

O.1

µF

1681 F01

VAUX

3.3V

10mA

15

OPTODRV

PLEASE REFER TO FIGURE 12 IN THE TYPICAL APPLICATIONS

SECTION FOR THE COMPLETE 3.3V/15A APPLICATION SCHEMATIC

5

34

RSYNC

RK

RE

ISOLATION

BOUNDARY

RF

REF

VFB

SG

TG

BG

LT3781

VC

CSYNC

CK

CF

VDD BIAS

CSG

+

–

D2

유사한 부품 번호 - LTC1698IGN

제조업체	부품명	데이터시트	상세설명
Linear Technology	LTC1698	1Mb / 24P	Isolated Secondary Synchronous Rectifier Controller

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유사한 설명 - LTC1698IGN

제조업체	부품명	데이터시트	상세설명
Semtech Corporation	SC4910A	318Kb / 19P	High Performance Secondary Side Controller with Synchronous Rectifier
Fairchild Semiconductor	FAN6208	1Mb / 18P	Secondary-Side Synchronous Rectifier Controller
Fairchild Semiconductor	FAN6208	1Mb / 18P	Secondary-Side Synchronous Rectifier Controller for LLC Topology
Linear Technology	LTC1698	1Mb / 24P	Isolated Secondary Synchronous Rectifier Controller
Semtech Corporation	SC4910A	320Kb / 19P	High Performance Secondary Side Controller with Synchronous Rectifier
ON Semiconductor	FAN6240	521Kb / 10P	Secondary-Side Synchronous Rectifier Controller Flyback Converters July 2016 Rev. 1.0
Grenergy Opto, lnc.	GR8387	601Kb / 11P	Secondary Side Synchronous Rectifier Controller
ON Semiconductor	FAN6241M6X	561Kb / 11P	Secondary Side Synchronous Rectifier Controller for Flyback Converters March, 2020 ??Rev. 1
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	FAN6292CMX	235Kb / 14P	Secondary Side Synchronous Rectifier Controller for Flyback Converters February, 2019 ??Rev. 1

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LTC1698IGN 데이터시트(PDF) 1 Page - Linear Technology

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