To help you quickly understand the key performance indicators of the FD6288Q, I've summarized its core parameters in a table:

 

Parameter Category Parameter Description Notes/Supplementary Information

Basic Architecture: Integrated with three independent half-bridge gate drive circuits. Can drive three half-bridge structures simultaneously.

 

Operating Voltage: Low-side supply voltage (VCC): 5V to 20V.

 

Recommended operating voltage range:

 

Floating Absolute Voltage: High-side floating absolute voltage (VB): Up to +250V.

 

Allows operation in high-voltage environments.

 

Output Current: +1.5A (source) / -1.8A (sink).

 

Strong drive capability, capable of quickly charging and discharging the power transistor gate.

 

Logic Compatibility: Supports 3.3V and 5V input logic levels.

 

Can directly interface with an MCU or DSP without additional level shifting circuitry.

 

Switching Speed: Rise Time (tr): 12ns (typical, CL=1000pF).

 

Fall Time: High-speed switching performance, suitable for high-frequency applications.

Propagation Delay: Turn-on propagation delay (tON): ~300-450ns 7

Turn-off propagation delay (tOFF): ~100-160ns 7

High-side and low-side delay matching: < 50ns 4

Short and well-matched delays help reduce switching losses.

Dead Time: Built-in fixed dead time of 200ns 79

Effectively prevents shoot-through between upper and lower transistors, enhancing safety.

Protection Features: VCC/VBS undervoltage lockout (UVLO): 27

Built-in shoot-through prevention function: 27

Input signal filtering (for noise immunity): 27

Comprehensive built-in protection features enhance system reliability.

Thermal Characteristics: Operating junction temperature (TJ): Maximum +150°C 3

Storage temperature: -55°C to +150°C 3

Thermal resistance (QFN24 package, RθJA): 42°C/W 2 Pay attention to heat dissipation design, especially in high-power or high-temperature environments.

Package Information: QFN-24-EP (4x4mm) with exposed pad. This compact package facilitates heat dissipation, but soldering requires skill.

🚀 Key Features

Some notable features of the FD6288Q include:

 

High-voltage capability: Its high floating absolute voltage of +250V enables it to operate in higher voltage environments, such as directly driving power devices connected to a rectified high-voltage busbar.

 

Powerful drive performance: It provides a peak source and sink current of +1.5A/-1.8A, enabling rapid charging and discharging of MOSFET or IGBT gate capacitance, reducing switching losses and improving overall efficiency. This is particularly important in high-frequency switching applications.

 

Comprehensive integrated protection features: The chip features an integrated undervoltage lockout (UVLO) function27, which shuts down the output when the drive voltage is insufficient, preventing damage to the power transistors due to operation in the non-saturated region. A fixed 200ns dead time79 and shoot-through prevention circuitry effectively prevent short circuits caused by simultaneous conduction of the upper and lower transistors. Input signal filtering enhances noise immunity27.

 

Excellent compatibility: The input logic level is compatible with both 3.3V and 5V systems2, allowing for direct connection to most microcontrollers (MCUs), digital signal processors (DSPs), or FPGAs, simplifying system design.

 

Compact package: The QFN-24 package (4x4mm) with an exposed pad (EP)13 saves space and improves heat dissipation, making it suitable for high-power density designs.

 

🔧 Application Scenarios

With the above features, the FD6288Q is ideally suited for applications requiring efficient and reliable drive of three-phase power topologies:

 

Three-phase brushless DC (BLDC) motor drive: This is the FD6288Q's most popular application. It can be used in air conditioners, washing machines, fans (including brushless fan driver boards), water pumps, drone ESCs, industrial servo drives, and other applications, achieving variable-frequency control and efficient operation of motors.

 

Power Conversion Systems:

 

Uninterruptible Power Supply (UPS): Used to drive inverter bridges and provide stable AC output.

 

Solar Microinverters: Improve the conversion efficiency of solar power generation.

 

High-power Switch-Mode Power Supplies (SMPS) and DC-AC Inverters: Especially in applications requiring a three-phase inverter topology.

 

Industrial Automation and Drives: Used in general-purpose inverters, industrial motor control, and other applications to drive three-phase AC motors or servo motors.

 

⚠️ Usage Precautions

When using the FD6288Q, there are several areas you should pay special attention to:

 

Bootstrap Circuit Design: The bootstrap diode for high-side drive should be a high-voltage (>250V) fast-recovery model. The bootstrap capacitor should be a low-leakage, stable ceramic or tantalum capacitor. The capacitance should be calculated based on parameters such as the power transistor gate charge and operating frequency to ensure sufficient voltage even at high duty cycles.

 

Gate Resistor Selection: An appropriate gate resistor (Rg) in series with the output is essential. It helps regulate switching speed, suppresses voltage overshoot and ringing, and is a key component in balancing switching losses and EMI.

 

Thermal Management: Although the QFN package has a relatively low thermal resistance (42°C/W), the chip's temperature rise should still be a concern when driving multiple high-power transistors or operating in high-frequency and high-temperature environments. Ensure that the PCB provides ample copper area and that it is well soldered to the chip's exposed pad to aid heat dissipation.

 

Layout and Routing: High-frequency, high-current loops (bootstrap capacitors and power transistor gates) should be arranged as compactly as possible to minimize parasitic inductance. High-quality decoupling capacitors should be placed near the VCC power pin. Signal and power grounds can be connected at a single point to avoid noise interference.

 

💎 Summary

The FD6288Q is a powerful, highly integrated three-phase gate driver IC, ideally suited for high-voltage, high-speed power switching applications such as three-phase BLDC motor drives, various power conversion systems, and industrial inverter equipment. Its high-voltage tolerance, robust drive capability, extensive built-in protection features, and excellent compatibility with low-voltage logic levels make it a preferred choice for many high-performance, high-reliability designs.

 

Of course, to fully realize its performance, careful peripheral circuit design (especially the bootstrap circuit and gate resistors), good PCB layout and routing, and thermal considerations are essential.