Precision-adjustable current limit power switch protects automotive subsystemsEngineering360 News Desk | September 08, 2021
Diodes Inc. has introduced the AP22653Q programmable current limiting power switch to streamline power system design and ensure ongoing reliability. The automotive-compliant device provides a controlled and protected power path and is rated to handle continuous load currents of up to 1.5 A. Key applications include protection of vehicle USB ports and electronic control unit supply rails, and infotainment and telematics subsystems.
With a tight accuracy margin of ±7% at high current levels, its current limit threshold can be simply set anywhere between 125 mA to 1,735 mA via use of standard value external resistors. The device’s controlled rise and fall times help to mitigate the effect of surges during turn on/off. In addition, and its 5 μs short circuit response helps avoid situations requiring system shutdown/restart.
The AP22653Q has a 55 mΩ (typical) on-resistance, which significantly reduces power loss and voltage drop at high load currents. The reverse-current protection integrated into this device safeguards against reverse currents when peripherals are being externally powered. Overtemperature protection and undervoltage lockout features are also included. An operational temperature range of -40° C to 125° C is supported.
The AP22653Q power switch is qualified to AEC-Q100 Grade 1 and is manufactured in IATF 16949 certified facilities.