LT1680 High Power DC/DC Step-Up Controller

The LT®1680 is a high power, current mode switching power supply controller optimized for boost topologies. The IC drives an N-channel MOSFET switch for DC/DC converter applications up to 60V input. A high current gate drive output handles up to 10,000pF gate capacitance, enabling the construction of high power DC/DC converters. Current sense common mode range up to 60V allows current sensing to be referenced to the input supply, eliminating the need for sense blanking circuits.

The LT1680 incorporates programmable average current limiting allowing accurate limiting of DC current in the magnetics, independent of ripple current. User adjustable slope compensation provides stable operation at duty cycles up to 90%.

The LT1680 operating frequency is programmable and can be synchronized up to 200kHz. Minimum off-time operation provides switch protection. The IC also incorporates a soft start feature that is gated by both shutdown and undervoltage lockout conditions

产品特点 Features

High Voltage: Operation Up to 60V
High Current: N-Channel Drive Handles Up to 10,000pF Gate Capacitance
Programmable Average Current Limiting
5V Reference Output with 10mA External Loading Capability
Fixed Frequency Current Mode Operation
Oscillator Synchronizable Up to 200kHz
Undervoltage Lockout with Hysteresis
Programmable Start Inhibit for Power Supply Sequencing and Protection
User Adjustable Slope Compensation

参数

应用

High Power Single Board Systems
Distributed Power Converters
Industrial Control Systems
Lead-Acid Battery Back-Up Systems
Automotive and Heavy Equipment

典型应用图

LT1680 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LT1680CN	PDIP	16	C	$4.90	$4.00
LT1680CN#PBF	PDIP	16	C	$4.90	$4.00
LT1680CSW	SO	16	C	$5.15	$4.20
LT1680CSW#PBF	SO	16	C	$5.15	$4.20
LT1680CSW#TR	SO	16	C		$4.26
LT1680CSW#TRPBF	SO	16	C		$4.26
LT1680IN	PDIP	16	I	$5.90	$4.80
LT1680IN#PBF	PDIP	16	I	$5.90	$4.80
LT1680ISW	SO	16	I	$6.15	$5.00
LT1680ISW#PBF	SO	16	I	$6.15	$5.00
LT1680ISW#TR	SO	16	I		$5.06
LT1680ISW#TRPBF	SO	16	I		$5.06

LT1680 数据手册及相关资料下载

数据手册(英文) : LT1680 - High Power DC/DC Step-Up Controller.PDF
应用指南 (英文) : AN73 - LT1339 Design Manual.PDF
可靠性数据 : R352 Reliability Data .PDF