BUK9K17-60E Detailed Introduction and Datasheet

BUK9K17-60E Detailed Introduction and Datasheet

TheBUK9K17-60EX is a high-performance dual N-channel logic-level MOSFET from Nexperia, utilizing advanced TrenchMOS technology and an LFPAK56D package. This product has found wide application in automotive electronics and high-efficiency power switching due to its low on-resistance, high breakdown voltage, and excellent thermal performance.

BUK9K17-60E Core Features Explained

The BUK9K17-60E is designed for applications with extremely high efficiency and reliability requirements. Its key features are as follows:

High-efficiency dual-channel design: It integrates two independent N-channel MOSFETs within a single package. This integrated design helps simplify board layout, reduce component count, and save valuable space, making it particularly suitable for compact electronic systems.

Superior switching performance: As a logic-level MOSFET, it can fully conduct at very low gate voltages. Specifically, even at a high temperature of 175°C, its gate threshold voltage remains above 0.5V, ensuring stability and reliability when directly driven by a microcontroller or logic chip.

Excellent Electrical Parameters:

Parameter	Value
Drain-Source Voltage (VDS)	60 V
Continuous Drain Current (ID)	26 A
On-Resistance (RDS(on))	17 mΩ (at VGS = 5V)
Maximum Power Dissipation (Ptot)	53 W
Operating Junction Temperature (Tj)	-55°C ~ +175°C

These parameters collectively ensure low conduction losses at high currents, strong power handling capabilities, and stable operation in harsh thermal environments.

Rugged Packaging and Reliability: The LFPAK56D (also known as Power-SO8 or SOT-1205) package offers excellent thermal performance, efficiently dissipating heat generated by the chip to the circuit board. Furthermore, this product meets AEC-Q101 standards and is repetitive avalanche withstand capability, meaning it can withstand unexpected voltage spikes during operation, making it ideal for demanding automotive electronics environments.

BUK9K17-60E Core Operating Principle Explained

To understand the operating principle of the BUK9K17-60E, you can start with the following key aspects:

1.MOSFET Switching Basics

It is a voltage-controlled device. When a voltage higher than the threshold voltage (typically 1.7V) is applied between the gate (G) and source (S), a conductive channel connecting the source (S) and drain (D) is formed inside the semiconductor. This allows current to flow from the drain to the source, turning the MOSFET on, equivalent to closing the switch. When the gate-source voltage is removed or falls below the threshold voltage, the conductive channel disappears, and the MOSFET enters the off state, equivalent to a switch being turned off, blocking the current path.

2.Advantages of TrenchMOS Technology

The BUK9K17-60E uses TrenchMOS technology, which allows current to flow vertically downwards by etching vertical trenches on the silicon wafer and forming the gate internally. This design significantly increases the density of conductive channels per unit area, thereby effectively reducing the on-resistance (RDS(on)). Low on-resistance means less power loss during conduction, and higher efficiency and power handling capabilities.

3.Significance of Logic Level Drive

As a logic level MOSFET, its characteristic is that it can be fully turned on at relatively low gate voltages (such as 3.3V or 5V). This allows it to be directly driven by the I/O ports of microcontrollers (MCUs), DSPs, or standard logic chips without the need for additional level conversion or complex drive circuits, simplifying system design.

4.Dual N-Channel Integration

Two independent and performance-matched N-channel MOSFETs are integrated within the LFPAK56D package. This integrated design simplifies PCB layout, saves board space, and improves system reliability, making it particularly suitable for circuits requiring multiple switches or forming half-bridge or full-bridge topologies.

5.Key Features and Reliability

Fast Switching Capability: Due to its low gate charge (Qg), it requires only a small amount of charge to quickly switch between on and off states, reducing switching losses and making it suitable for high-frequency switching applications.

Repeated Avalanche Withstandability: This characteristic indicates that the device can withstand reverse voltage spikes (i.e., avalanche energy) generated by inductive loads (such as motors and solenoids) during operation without damage, enhancing robustness in harsh environments.

Compliant with AEC-Q101 Standard: This indicates that the device has passed the reliability testing of the Automotive Electronics Council, meeting the stringent quality and reliability requirements of the automotive industry.

BUK9K17-60E Typical Applications and Design Considerations

The BUK9K17-60E excels in the following applications due to its features:

12V Automotive Systems: Such as motor drives (window regulators, windshield wipers), lighting control (headlights, taillights), solenoid drives, and transmission control systems.

Industrial and Consumer Electronics: DC-DC converters requiring efficient power switching, motor control, and power management systems.

In practical applications, several design considerations should be noted:

Gate Drive Design: To ensure fast switching and prevent oscillation, it is recommended to connect a small resistor in series with the gate, and a pull-down resistor may be needed between the gate and source to ensure default state.

Thermal Management: Although the LFPAK56D package has good thermal performance, sufficient PCB copper foil area is still required as a heatsink for high-current applications. Refer to the thermal design guidelines provided by Nexperia for optimization.

Freewheeling and Protection: When driving inductive loads, a freewheeling path must be provided for the current, typically achieved through parallel diodes or snubber circuits, to protect the MOSFET from back electromotive force.

BUK9K17-60E Package and Pin Information

BUK9K17-60E Main Applications

With the above characteristics, the BUK9K17-60E excels in multiple fields, especially in automotive electronic systems:

12V Automotive Systems: For example, motor drives (window regulators, windshield wipers), lighting control (headlights, taillights), and solenoid drives.

Transmission Control: For precision control such as solenoid valve drives in automatic or manual transmissions.

Industrial and Consumer Electronics: Also suitable for DC-DC converters requiring efficient power switching, motor control, and power management systems.

BUK9K17-60E Datasheet

Summary

In conclusion, Nexperia's BUK9K17-60E is a power switching solution that achieves an excellent balance between power density, efficiency, and reliability. It has demonstrated tremendous value in space-constrained and harsh environments, particularly in modern automotive electronic systems.