ET9932- 5A Overvoltage Protection IC for USB Type-C

As USB Type-C becomes the standard for fast charging and high-speed data, the risk of electrical damage from voltage surges has never been higher. Protecting internal hardware is just as critical as delivering end-user features. To address this, designers need integrated protection that doesn’t compromise efficiency — such as the ET9932.

The ET9932 from ETEK is an advanced 5A unidirectional power switch with integrated overvoltage protection, specifically designed for USB Power Delivery applications. It acts as a gatekeeper for your USB port, ensuring that only safe, regulated power enters your system.

Why USB Type-C Designs Need Overvoltage Protection

In the era of USB Power Delivery (PD), power levels are reaching new heights. While this means faster charging for laptops and smartphones, it also introduces significant challenges for circuit protection. A single voltage spike can destroy sensitive internal components. By integrating an OVP IC like the ET9932, you create a barrier that keeps destructive energy away from the main processor and battery management systems.

Key Features for Maximum Safety

The ET9932 combines several critical protection layers into one compact package:

• Wide Operating Voltage: 2.9V to 20V, making it suitable for a broad range of consumer electronics.

• Adjustable OVP Thresholds: The default overvoltage protection is set to 22V. The threshold can be adjusted from 4V to 24V using an external resistor divider on the OVLO pin to match specific system requirements.

• Robust Surge Protection: Built-in ±100V surge protection (IEC61000-4-5) ensures reliable operation even under severe electrical stress.

• Ultra-Low On-Resistance: With a typical on-resistance of only 27mΩ, the ET9932 minimizes power loss, keeping the device cool and efficient.

Protecting Multi-Port Systems with Ease

Modern laptops and tablets often feature multiple USB-C ports. This adds complexity because the design must prevent reverse current — a situation where power from one high-voltage source accidentally flows into a lower-voltage source. The ET9932 is engineered for this exact scenario.

Two ET9932 devices can be connected in parallel to manage dual power inputs, ensuring system stability when multiple chargers are connected simultaneously. The built-in slew rate control limits inrush current, preventing dangerous current spikes or system resets when a cable is first plugged in.

Compact Package for Slim Devices

For engineers designing compact mobile devices, PCB space is at a premium. The ET9932 uses a WLCSP15 package measuring just 2.53mm × 1.51mm with a 0.5mm pitch. The tiny footprint allows high component density on the board without sacrificing protection.

Comprehensive Built-In Protection

The ET9932 delivers reliable protection through multiple integrated circuits:

• Under-Voltage Lockout (UVLO): Prevents operation when input voltage falls below the safe threshold.

• Over-Temperature Protection (OTP): Automatically disables the power switch when junction temperature exceeds 150°C.

• Reverse Current Protection (RCP): Two-level RCP prevents current from flowing back from the output to the input, with a 45mV trigger threshold and 120mV fast-trip threshold.

If a fault occurs, the chip automatically isolates the power switch terminals, effectively disconnecting the danger before it reaches downstream circuits.

Request ET9932 Samples

At ETEK, we specialize in providing power management and circuit protection solutions for the global electronics market. The ET9932 overvoltage protection IC demonstrates our engineering expertise in USB PD safety.

Ready to integrate the ET9932 into your next project? Contact our sales team today for technical specifications, samples, and volume pricing.

Email: marketing@etekmicro.com

Request samples: https://www.etekmicro.com/sample/