LTC4416 36V, Low Loss Dual PowerPath Controllers for Large PFETs

The LTC4416/LTC4416-1 control two sets of external P-channel MOSFETs to create two near ideal diode functions for power switchover circuits. This permits highly effi cient OR’ing of multiple power sources for extended battery life and low self heating. When conducting, the voltage drop across the MOSFET is typically 25mV. For applications with a wall adapter or other auxiliary power source, the load is automatically disconnected from the battery when the auxiliary source is connected.

The LTC4416 integrates two interconnected PowerPath controllers with soft switchover control. The “soft-off” switchover permits the users to transfer between two dissimilar voltages without excessive voltage undershoot (or VDROOP) in the output supply. The LTC4416/LTC4416-1 also contain a “fast-on” feature that dramatically increases gate drive current when the forward input voltage exceeds 25mV. The LTC4416 “fast off” feature is engaged when the sense voltage exceeds the input voltage by 25mV. The LTC4416-1 enables the fast off under the same conditions and when the other external P-channel device is selected using the enable pins.

The wide operating supply range supports operation from one to eight Li-Ion cells in series. The low quiescent current (35μA per channel) is independent of the load current. The gate driver includes an internal voltage clamp for MOSFET protection.

The LTC4416/LTC4416-1 are available in low profi le 10-lead MSOP packages

产品特点 Features

Designed Specifi cally to Drive Large and Small QG PFETs

Very Low Loss Replacement for Power Supply OR’ing Diodes

Wide Operating Voltage Range: 3.6V to 36V

–40°C to 125°C Operating Temperature Range

Reverse Battery Protection

Automatic Switching Between DC Sources

Low Quiescent Current: 35μA per Channel

Load Current Sharing

MOSFET Gate Protection Clamp

Precision Input Control Comparators for Setting Switchover Threshold Points

Open-Drain Feedback Points for Customer Specified Hysteresis Control

Minimal External Components

参数

应用

High Current PowerPath Switch
Industrial and Automotive Applications
Uninterruptible Power Supplies
Logic Controlled Power Switch
Battery Backup System
Emergency Systems with Battery Backups

典型应用图

LTC4416 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) *
LTC4416EMS#PBF	MSOP	10	E	$3.78	$2.45
LTC4416EMS#TRPBF	MSOP	10	E		$2.51
LTC4416EMS-1#PBF	MSOP	10	E	$3.78	$2.45
LTC4416EMS-1#TRPBF	MSOP	10	E		$2.51
LTC4416IMS#PBF	MSOP	10	I	$4.56	$2.95
LTC4416IMS#TRPBF	MSOP	10	I		$3.01
LTC4416IMS-1	MSOP	10	I	$4.56	$2.95
LTC4416IMS-1#PBF	MSOP	10	I	$4.56	$2.95
LTC4416IMS-1#TRPBF	MSOP	10	I		$3.01

LTC4416 数据手册及相关资料下载

数据手册 (英文) : LTC4416 - 36V, Low Loss Dual PowerPath Controllers for Large PFETs.PDF
设计要点 (中文) : DN450 - 对于电源故障保护应用，超级电容器能够替代后备电池.PDF
设计要点 (中文) : DN485 - 完全利用能量以将超级电容器驾驭应用电路的运行时间延长 40%.PDF
可靠性数据 : R384 Reliability Data .PDF
产品选型卡 : PowerPath Controllers, Ideal Diodes.PDF