AON7932_101

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
FET Type:	2 N-Channel (Half Bridge)
FET Feature:	Logic Level Gate
Drain to Source Voltage (Vdss):	30V
Current - Continuous Drain (Id) @ 25°C:	6.6A, 8.1A
Rds On (Max) @ Id, Vgs:	20 mOhm @ 6.6A, 10V
Vgs(th) (Max) @ Id:	2.4V @ 250µA
Gate Charge (Qg) (Max) @ Vgs:	6.5nC @ 10V
Input Capacitance (Ciss) (Max) @ Vds:	460pF @ 15V
Power - Max:	1.4W
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	8-WDFN Exposed Pad
Supplier Device Package:	8-DFN (3x3)

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Introduction

The AON7932_101 is an array of FETs developed by ON Semi. It provides an integrated solution to drive large currents. It has been specifically designed to reduce total solution size and cost. This article will discuss the applications field and working principle of AON7932_101.

Applications Field

The AON7932_101 offers a complete solution for driving power FETs and delivering large currents and offers to increase power efficiency. It is suitable for switching mode power supplies (SMPS) with >500kHz switching frequencies, voltage regulators, DC output filters, and audio amplifiers. The AON7932_101 combines together a gate driver, an oscillator, an over-current protection circuit, a temperature protection circuit and a current sense comparator all in one package. It is also designed to reduce the number of external components as much as possible.

Working Principle

The AON7932_101 is an array of three N-Channel MOSFETs and has two different modes of operation: fixed frequency and variable frequency. When in fixed frequency mode, the AON7932_101 operates at a fixed frequency that is determined by an external capacitor and an internal oscillator. When in variable frequency mode, the device’s switching frequency is determined by an external voltage and the voltage across the sense resistor. This allows a linear change in frequency with the drain voltage, and therefore better thermal behaviour. The AON7932_101 also features adjustable over-current protection, which eliminates the need for an external current sense resistor by providing a current limit threshold. Finally, the AON7932_101 also features an over-temperature protection circuit to protect the FETs from over-heating and ensure safe operation.

Conclusion

The AON7932_101 is an array of FETs that provides a complete solution for driving large currents and switching mode power supplies with >500kHz switching frequencies. It features two different modes of operation, a current sense comparator, an over-current protection circuit and an over-temperature protection circuit. It is also designed to reduce the number of external components as much as possible.

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