LTC4230 Triple Hot Swap Controller with Multifunction Current Control

The LTC®4230 is a 3-channel Hot Swap™ controller that allows a board to be safely inserted and removed from a live backplane. Internal high side switch drivers control the gates of external N-channel MOSFETs for supply voltages ranging from 1.7V to 16.5V. The LTC4230 provides soft-start and inrush current limiting during the programmable start-up period.

On-chip current limit comparators provide dual level circuit breaker protection. The slow comparators trip at VCCn–50mV and activate in 10µs or are programmed by an external filter capacitor. The fast comparators trip at VCCn–150mV and typically respond in 500ns.

Each FBnpin monitors its own output supply voltage and signals its RESET pin. The ON pin turns the chip on and off and can be used for a reset function. The LTC4230 also provides additional functions including fault indication, autoretry or latchoff modes, programmable current limit response time based on the FAULT and FILTER pins’ functionality

产品特点 Features

Allows Safe Board Insertion and Removal from a Live Backplane
Controls Three Supply Voltages from 1.7V to 16.5V with VCC1 >or= VCC2 >or= VCC3
Programmable Soft-Start with Inrush Current Limiting, No External Gate Capacitor Required
Faster Turn-Off Time with No Gate Capacitor
Dual Level Overcurrent Fault Protection
Programmable Overcurrent Response Time
Programmable Overvoltage Protection
Automatic Retry or Latched Mode Operation
Independent N-Channel FET High Side Drivers
User-Programmable Supply Voltage Power-Up Rate
FBn Pin Monitors VOUTn and Signals RESETn
Glitch Filter Eliminates Spurious RESETn Signals

应用

Electronic Circuit Breaker
Hot Board Insertion and Removal (Either On Backplane or On Removable Card)
Industrial High Side Switch/Circuit Breaker

典型应用图

参数

LTC4230 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) *
LTC4230CGN	SSOP	20	C	$4.55	$3.65
LTC4230CGN#PBF	SSOP	20	C	$4.55	$3.65
LTC4230CGN#TR	SSOP	20	C		$3.75
LTC4230CGN#TRPBF	SSOP	20	C		$3.75
LTC4230IGN	SSOP	20	I	$5.30	$4.25
LTC4230IGN#PBF	SSOP	20	I	$5.30	$4.25
LTC4230IGN#TR	SSOP	20	I		$4.35
LTC4230IGN#TRPBF	SSOP	20	I		$4.35

LTC4230 数据手册及相关资料下载

数据手册(英文) : LTC4230 - Triple Hot Swap Controller with Multifunction Current Control.PDF
可靠性数据 : R427 Reliability Data .PDF
产品选型卡 : Low Voltage Hot Swap Controllers.PDF