LTC1698 - LTC1698是Isolated Secondary Synchronous Rectifier Controller

LTC1698是LINEAR凌力尔特公司的一款副边控制器产品，LTC1698是LTC1698是Isolated Secondary Synchronous Rectifier Controller，本站介绍了LTC1698的封装应用图解、特点和优点、功能等，并给出了与LTC1698相关的LINEAR元器件型号供参考。

LTC1698 - LTC1698是Isolated Secondary Synchronous Rectifier Controller - 副边控制器 - 电源管理 - 凌力尔特

LTC1698 - Isolated Secondary Synchronous Rectifier Controller

LTC1698 - Isolated Secondary Synchronous Rectifier Controller - Linear Technology（凌力尔特）

功能描述

The LTC1698 is a precision secondary-side forward converter controller that synchronously drives external N-channel MOSFETs. It is designed for use with the LT3781 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.

特点

High Efficiency Over Wide Load Current Range

±0.8% Output Voltage Accuracy

Dual N-Channel MOSFET Synchronous Drivers

Pulse Transformer Synchronization

Optocoupler Feedback Driver

Programmable Current Limit Protection

±5% Margin Output Voltage Adjustment

Adjustable Overvoltage Fault Protection

Power Good Flag

Auxiliary 3.3V Logic Supply

Available in 16-Lead SSOP and SO Packages

应用

48V Input Isolated DC/DC Converters

Isolated Telecommunication Power Systems

Distributed Power Step-Down Converters

Industrial Control Systems

Automotive and Heavy Equipment

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LTC1698EGN	SSOP-16	E	$6.27	$5.30
LTC1698EGN#PBF	SSOP-16	E	$6.27	$5.30
LTC1698EGN#TR	SSOP-16	E		$5.36
LTC1698EGN#TRPBF	SSOP-16	E		$5.36
LTC1698ES	SO-16	E	$6.33	$5.35
LTC1698ES#PBF	SO-16	E	$6.33	$5.35
LTC1698ES#TR	SO-16	E		$5.41
LTC1698ES#TRPBF	SO-16	E		$5.41
LTC1698IGN	SSOP-16	I	$6.92	$5.85
LTC1698IGN#PBF	SSOP-16	I	$6.92	$5.85
LTC1698IGN#TR	SSOP-16	I		$5.91
LTC1698IGN#TRPBF	SSOP-16	I		$5.91
LTC1698IS	SO-16	I	$6.98	$5.90
LTC1698IS#PBF	SO-16	I	$6.98	$5.90
LTC1698IS#TR	SO-16	I		$5.96
LTC1698IS#TRPBF	SO-16	I		$5.96

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