diodes.com

Announcement

New Product

The DIODES Advantage

The 80V-rated AP74502Q and AP74502HQ provide reverse

battery polarity and overvoltage protection to increase

robustness of off-battery automotive applications.

The automotive-compliant AP74502Q and

AP74502HQ provide a simple, cost-

effective protection solution for reverse-

polarity and overvoltage conditions.

They drive two external back-to-back N-

channel MOSFETs which, coupled with their

OVLO pin, provides input overvoltage

protection as well as limited inrush current

control.

The AP74502Q has a peak gate drive

source capability of 60μA, which provides a

longer turn-on time and hence, inrush

current limitation. The AP74502HQ has a

11mA peak gate drive source capacity.

The AP74502Q and AP74502HQ do not

have reverse current blocking features and

are suitable for input reverse polarity

protection of loads that may return energy to

the input supply. This includes automotive

body control module motor loads.

The products’ wide supply input range of

3.2V to 75V supports RVP and overvoltage

protection in existing 12V and 24V battery

systems, as well as the growing 48V

automotive battery systems utilized in xEV

vehicles. Their 3.2V operation capability

ensures correct operation even in the severe

cold-cranking conditions within automotive

systems.

The AP74502Q and AP74502HQ are

available in the industry-standard SOT28

package.

80V Low IQ Ideal Diode Controller Provides Enhanced Protection

Against Reverse Battery and Overvoltage in 48V Systems

AP74502Q

AP74502HQ

▪ 80V Maximum Input

Protects 12V/ 24V/ 48V battery systems from overvoltage

condition

▪ Correct Operation Down 3.2V Across All Temperatures

Supports severe cold-crank requirement in automotive

systems

▪ Drives Back-to-Back External N-MOSFETs with

Overvoltage Detection

Protects and isolates downstream systems from battery

overvoltage conditions

▪ Two Gate Drive Options

Provides targeted inrush current control

▪ AEC-Q100 Grade 1 Qualified with 150°C Maximum

Junction Temperature

Supports the -40°C to +125°C ambient temperature range

Applications

Automotive reverse battery protection in:

▪ Body control modules

▪ Infotainment

▪ Advanced driver assistance

systems (ADAS)

▪ Exterior lighting

▪ USB charging

July 2025

Automotive-compliant - AEC qualified, manufactured in

sites certified to IATF 16949 supporting PPAP documents.

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Incorporated in the United States and other countries.

All other trademarks are the property of their respective

owners.

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Reserved.