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How to use the low-loss PowerPathTM controller LTC4412 packaged by ThinSOT, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

Characteristics

Very low loss alternatives to power OR diodes

Very few external components

Automatic switching between DC power supplies

Simplifies load sharing when using multiple batteries

Low static current: 11 μ A

Voltage range of 3V to 28V AC/DC adapter

Battery voltage range from 2.5v to 28V

Battery reverse protection

MOSFET of almost any size can be driven to meet the requirements of a wide current range

MOSFET gate protection clamp

Manual control input

Flat (height 1mm only) ThinSOTTM package

Typical application

Description

The LTC ®4412 controls an external P-channel MOSFET to create a near-ideal diode function for power switching or load sharing. This enables efficient "OR" operation of multiple power supplies, designed to extend battery life and reduce spontaneous heat. When on, the voltage drop at both ends of the MOSFET is usually 20mV. For applications that use a wall adapter or other auxiliary power supply, the load is automatically disconnected from the battery when the auxiliary power supply is connected. Load sharing between multiple batteries can be achieved through the interconnection of two or more LTC4412 or multiple batteries can be charged from a single charger.

LTC4412's wide power range supports the use of 1 to 6 series lithium-ion batteries to provide working power. The low static current (typical value is 11 μ A) is independent of the load current. The gate driver includes an internal voltage clamp for MOSFET protection.

When an auxiliary power supply is detected, a STAT pin can be used to enable an auxiliary P-channel MOSFET power switch. The pin can also be used to send an indication signal to the microcontroller when an auxiliary power supply is connected. Control

The (CTL) input enables the user to forcibly turn off the main MOSFET and set the STAT pin to a low level.

The LTC4412 is in a flat (height only 1mm) ThinSOT package.

Application

Cellular telephone

Laptops and handheld computers

Digital camera

USB powered peripherals

Uninterruptible Power Supply

Logic controlled power switch

This is the answer to the question about how to use the low-loss PowerPathTM controller LTC4412 packaged by ThinSOT. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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