چیپ کنترلر پاور LTC4412ES6 میتواند یک ماسفت خارجی P-Channel را کنترل کند و از این طریق زمانی که چند منبع تغذیه متفاوت داریم، منبع مورد نظر را تعیین و به بار متصل کند.
این قابلیت در دستگاه های UPS یا تمام دستگاه های قابل شارژ مورد استفاده است به این شکل که به کمک این آی سی میتوانید زمانی که برق متصل است از برق خارجی و اگه متصل نبود انتخاب کنید که از
باتری استفاده کنید.
پکیج چیپ LTC4412ES6 به صورت SMD و SOT23-6 میباشد.
Description:
The LTC4412 controls an external P-channel MOSFET to create a near ideal diode function for power switchover or load sharing. 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 LTC4412s may be interconnected to allow load sharing between multiple batteries or charging of multiple batteries from a single charger.
The wide supply operating range supports operation from one to six Li-Ion cells in series. The low quiescent current (11µA typical) is independent of the load current. The gate driver includes an internal voltage clamp for MOSFET protection.
The STAT pin can be used to enable an auxiliary P-channel MOSFET power switch when an auxiliary supply is detected. This pin may also be used to indicate to a microcontroller that an auxiliary supply is connected. The control (CTL) input enables the user to force the primary MOSFET off and the STAT pin low.
Application:
Cellular Phones
Notebook and Handheld Computers
Digital Cameras
USB-Powered Peripherals
Uninterruptible Power Supplies
Logic Controlled Power Switch
Specifications:
Very Low Loss Replacement for Power Supply OR’ing Diodes
Minimal External Components
Automatic Switching Between DC Sources
Simplifies Load Sharing with Multiple Batteries
Low Quiescent Current: 11µA
3V to 28V AC/DC Adapter Voltage Range
2.5V to 28V Battery Voltage Range
Reverse Battery Protection
Drives Almost Any Size MOSFET for Wide Range of Current Requirements
MOSFET Gate Protection Clamp
Manual Control Input