Introduction
Traditional hair dryers often use brushed motors, which have lower speeds, simple structures, and driving methods, resulting in lower overall costs. However, these conventional hair dryers produce less airflow, and to ensure effective drying, they must rely on high-power heating elements to increase the air temperature, which can be quite hot during regular use and may damage hair, causing issues for those with sensitive hair types.
With the widespread promotion of high-speed hair dryer products by major brands, high-speed hair dryers have gradually entered the public’s view. These products typically use brushless motors, achieving speeds of up to 100,000 RPM, resulting in higher airflow and lower air temperatures, making them more comfortable for daily use and providing better hair care effects. They have now become one of the mainstream choices for consumers.
Recently, Texas Instruments (TI) launched a GaN power module for high-speed hair dryers, which integrates GaN devices and drivers to efficiently drive brushless DC motors and permanent magnet synchronous motors, assisting major brands in designing and manufacturing high-quality high-speed hair dryer products. The following article will provide a detailed introduction.
TI Launches GaN Power Module for High-Speed Hair DryersDRV7308
Texas Instruments’ DRV7308 is an advanced three-phase GaN power module, packaged in a VQFN 12×12 format, designed for efficient driving of three-phase brushless DC motors and permanent magnet synchronous motors.
This module integrates a 650V enhanced GaN with a low on-resistance of 205mΩ, capable of providing a peak current of 5A at a working voltage of up to 450V. It features low conduction and switching losses, allowing for over 99% efficiency in 250W motor drive applications operating at a 20kHz switching frequency, without the need for a heatsink. Additionally, the module has a <135nS ultra-low propagation delay and <200ns adaptive dead time, effectively reducing distortion and achieving silent operation.
The DRV7308 module is highly integrated, incorporating various functions and protection mechanisms. It includes a gate driver with a slew rate control of 5V/ns to 40V/ns, supports current sensing with 1, 2, or 3 shunts, and is equipped with an operational amplifier with an 11MHz, 15V/μs gain bandwidth for single shunt current detection. Furthermore, the module supports 3.3V and 5V logic inputs and features an integrated BRAKE function that can simultaneously turn on all low-side GaN devices for rapid braking. In terms of protection, the DRV7308 integrates a temperature sensor and comprehensive protection features, including overcurrent protection, over-temperature protection, undervoltage lockout, and adaptive dead time insertion, ensuring reliability and safety under various operating conditions.
The DRV7308 GaN power module is suitable for various application scenarios, including household appliances such as refrigerators, air conditioners, dishwashers, and range hoods, as well as industrial applications like HVAC pumps and fans. Its excellent thermal performance and compact size make it easy to achieve efficient driving in limited spaces.
Additionally, Texas Instruments provides detailed development guides and examples on its official website to help designers optimize circuit board designs and ensure optimal performance.
Summary from Charging Head Network
As consumers pursue hair care and comfort experiences, the high-speed hair dryer market is gradually emerging. The DRV7308 GaN power module launched by Texas Instruments, with its efficient driving, low losses, high integration, and robust protection mechanisms, provides strong support for the design of high-speed hair dryers. Moreover, this module is not only suitable for hair dryers but can also be widely applied in household appliances and industrial fields, making it possible to enhance energy efficiency in products within limited spaces due to its compact size and excellent thermal performance.
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