LTC4414EMS8

Product Summary

The LTC4414EMS8 is a Low Loss PowerPath Controller. The LTC4414EMS8 controls an external P-channel MOSFET to create a near ideal diode function for power switchover. This permits highly efficient OR’ing of multiple power sources for extended battery life and low self- heating. When conducting, the voltage drop across the MOSFET is typically 20mV. 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. Two or more LTC4414EMS8 may be interconnected to allow switchover between multiple batteries or charging of multiple batteries from a single charger. The wide supply operating range supports operation from one to eight Li-Ion cells in series. The low quiescent current (30μA typical) is independent of the load current. The gate driver includes an internal voltage clamp for MOSFET protection. The applications of the LTC4414EMS8 include High Current Power Path Switch, Industrial and Automotive Applications, Uninterruptable Power Supplies, Logic Controlled Power Switch, Battery Backup Systems and Emergency Systems with Battery Backups.

Parametrics

LTC4414EMS8 absolute maximum ratings: (1)Supply Voltage (VIN): –14V to 40V; (2)Voltage from VIN to SENSE: – 40V to 40V; (3)Input Voltage CTL: –0.3V to 40V; (4)SENSE: –14V to 40V; (5)Output Voltage GATE: –0.3V to the Higher of VIN + 0.3V or SENSE + 0.3V; (6)STAT: –0.3V to 40V; (7)Operating Ambient Temperature Range (Note 2): – 40℃ to 85℃; (8)Operating Junction Temperature: –40℃ to 125℃; (9)Storage Temperature Range: –65℃ to 150℃; (10)Lead Temperature (Soldering, 10 sec): 300℃.

Features

LTC4414EMS8 features: (1)Designed Specifically to Drive Large QG PFETs; (2)Very Low Loss Replacement for Power Supply OR’ing Diodes; (3)3.5V to 36V AC/DC Adapter Voltage Range; (4)Minimal External Components; (5)Automatic Switching Between DC Sources; (6)Low Quiescent Current: 30μA; (7)3V to 36V Battery Voltage Range; (8)Limited Reverse Battery Protection; (9)MOSFET Gate Protection Clamp; (10)Manual Control Input; (11)Space Saving 8-Lead MSOP Package.

Diagrams