Power switch provides high levels of protection for automotive subsystems

Diodes Incorporated has launched the AP22653Q programmable current limiting power switch. Streamlining power system design and ensuring ongoing reliability, this automotive-compliant device offers a controlled and protected power path. It is rated to handle continuous load currents of up to 1.5A.

With a tight accuracy margin of ±7% at high current levels, the device’s current limit threshold may be easily set anywhere between 125mA to 1735mA using standard value external resistors. The device’s controlled rise and fall times assist in mitigating the effect of surges throughout turn on/off. Also, its 5μs short circuit response aids to avoid situations needing system shutdown/restart.

The device has a 55mOhm (typical) on-resistance, which notably decreases 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 incorporated. An operational temperature range of -40C to 125C is supported.

The power switch is qualified to AEC-Q100 Grade 1, is manufactured in IATF 16949 certified facilities, and is PPAP capable. It is supplied in a compact SOT26 package.

Key applications incorporate protection of vehicle USB ports and ECU supply rails and infotainment and telematics subsystems.

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