AO8807 Discrete Semiconductor Products

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1. Introduction

AO8807 is an array of high voltage field-effect transistors (FETs) for use in high voltage battery management applications. This device is an 8-channel ultra low power device developed for battery management system applications. AO8807 is primarily optimized for ultra low power protection of high voltage cells (lower than 12V) without compromising performance.

2. Functions

This device provide functions of high accuracy reverse connection protection, low dynamic resistance, fast turn-on and turn-off, and ultra low power dissipation. The device can also be electrically monitored and is robust against electrostatic discharge (ESD). AO8807 is designed to protect high voltage applications including super capacitors, Li-ion and Li-polymer batteries, and other high voltage cells.

3. Application

AO8807 can be used in automotive and industrial power systems for protection against reverse connection, short circuits, and overcurrent. With its robust ESD rating, AO8807 can be used in applications such as portable devices and consumer electronics for various DC/DC converter applications. With its low quiescent current, AO8807 can be used as a load switch for power management applications such as valve controls, audio systems and navigation systems.

4. Working Principle

The AO8807 consists of an array of eight integrated high voltage FETs (HVFETs) with two N-channel HVFETs and two P-channel HVFETs connected in parallel. Each FET has its own gate drive and protection circuit, which is optimized to provide fast turn-on and turn-off as well as extreme electrostatic discharge protection. The current limitation is determined by the gate drive, the gate to source voltage, and the on-resistance of the FET. The two N-channel FETs protect against reverse connection while the two P-channel FETs provide protection from short circuit and over current. The device can be electrically monitored and the voltage drop across the FETs can be used for protection.

5. Conclusion

In conclusion, the AO8807 is a high voltage array FET for battery management and protection applications. This versatile device can be used in various applications such as automotive, industrial, and portable devices. With its high accuracy reverse connection protection and low dynamic resistance, it is an ideal choice for high voltage cell protection. The device is robust against ESD and is capable of fast turn-on and turn-off.

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