In this issue, the technical team of Xinpeng Micro shares the high-precision current limiting switch AP1625X for fans, this series of chips has the advantages of high-precision current limiting, low temperature rise, true shutdown, high reliability, etc., and can be applied to USB charging, laptops, set-top boxes, smart TVs and other occasions.
Wide current range: 065a、1a、1.5a.1a.5a、3a、3.4A and seven current limiting gears are optional, and the application is flexible
High-precision current limiting: ultra-low offset op amp is adopted, and the current limiting accuracy is up to 8%.
Low temperature rise: Built-in 45M P-channel MOSFET, SOT23-5L package achieves 3A continuous load current, and has ultra-low power consumption and temperature rise
True shutdown: the reverse current is less than 25ua, safer and more energy-saving;
Safe and reliable: input under-voltage protection, over-current protection, short-circuit protection, anti-backfill protection, over-temperature protection, output intelligent discharge, etc.
Test conditions: vin 5v, ta=25 85 -40
Test conditions: iout=1a, vin=3 55v@ ta=25 or ta=-40 85 @ vin=5v
Test condition 1: vin 5v, iout=21a, ambient temperature 25, demo semi-open, windless environment.
Test condition 2: VIN 5V, output short circuit, ambient temperature 25, demo semi-open, no wind environment.
Test results: The maximum temperature on the surface of the module is recorded as the shell temperature.
AP1625E with load 21a
The AP1625E output is short-circuited.
Overcurrent protection. 
Short-circuit protection. 
Anti-backfill protection.
Backflush protection restoration.
In order to get the best chip performance, the power input capacitor C1 is as close as possible to the VIN and GND pins of the chip, and the output capacitor C2 is as close as possible to the OUT and GND pins of the chip
The VIN and OUT pins are power pins, and sufficient trace width should be reserved when PCB wiring
It is recommended to connect GND to a large area to further reduce the temperature rise of the chip
The en pin is the enabling control pin of the chip, and there is no pull-up or pull-down resistor inside, so it cannot be suspended when in use.
The fault flag output pin can be connected to the I O port of the MCU to realize the protection fault reporting functions such as over-current, over-temperature, and short circuit, and if this function is not used, the pin can be suspended.
If you need data sheets, sample testing, procurement, BOM matching and other needs, **Customer Service WeChat: 13310830171.
Chips