Efficiency Meets Miniaturization: Inside SLKOR Micro's SL27517A Motor Driver
Shenzhen SLKOR Micro (www.slkormicro.com) Semicon Co., Ltd., a technology powerhouse backed by a core team of Tsinghua University alumni, continues to push the boundaries of innovation with cutting-edge materials, advanced processes, and next-generation semiconductor products. The company has mastered world-leading third-generation silicon carbide (SiC) power device technology. As an integrated high-tech enterprise specializing in electronic product design, development, manufacturing, and sales, SLKOR Micro delivers robust, reliable solutions and comprehensive technical support to global clients.
1.1 Name: Sacowei SL27517A driver MOSFET solution
1.2 Applications: power tools, motor control, AC/DC converter, industrial control, etc.
Performance parameters are benchmarked and highly compatible
2.1 Symmetric drive capability
The SLKOR Micro SL27517A is a 4A single-channel gate driver that delivers several strong advantages over TI’s UCC27517DBVR (Texas Instruments). Its competitive edge lies in performance compatibility, cost efficiency, design flexibility, and long-term supply stability.
The SL27517A supports a 4A peak current (symmetric drive) at VDD = 12V, fully matching the source/sink current capability of the UCC27517. It drives power devices such as MOSFETs and IGBTs with high efficiency, making it ideal for switching power supplies, DC-DC converters, and other demanding applications.
The SL27517A operates across a wide voltage range of 4.5V to 20V, exceeding the UCC27517’s 4.5V to 18V specification and offering better adaptability for low-voltage or battery-powered environments (such as portable or handheld devices).
2.2 Low delay and high-speed response
The SLKOR Micro SL27517A maintains an ultra-short propagation delay (typically 12ns) along with fast rise/fall times (6ns / 11ns), ensuring minimal switching loss. This makes it an excellent choice for high-frequency applications, including digital power systems and GaN device driving.
3. Design flexibility and security improvement
3.1 Dual input configuration and power adaptability
The SLKOR Micro SL27517A supports both in-phase (IN–) and out-of-phase (IN+) input modes. With its dual-pin configuration, the device can flexibly match various logic-control requirements, making circuit design easier, cleaner, and more efficient.
3.2 Floating-input protection
When the input pin is left floating, the SLKOR SL27517A automatically forces the output to a low level, preventing accidental switching of the power device. This greatly improves system safety and operational reliability in complex environments.
3.3 Low static power consumption
Designed with energy efficiency in mind, the SL27517A features extremely low quiescent current, helping reduce overall system power loss and enabling longer-lasting, more stable operation across a wide range of applications.
The static current is minimal, especially suitable for battery powered or low power consumption scenarios (such as solar equipment, UPS).
Application principle:
4.1 The input modulation signal generates a PWM waveform that drives the SLKOR Micro PC817 optocoupler U2. Under a high-level 2-pulse signal, the optocoupler operates at approximately 6 mA (5V control can be achieved by adjusting current-limiting resistors R6 and R8). The primary role of the optocoupler is signal isolation, with power supplied by the SLKOR Micro LM2596S-5.0 DC-DC power module from slkor(www.slkormicro.com).
External modulation signals may come from the PL component, while D1 — using a SLKOR Micro switching diode — acts as a freewheeling and protection element. When the modulation signal reverses, the diode conducts to safeguard the optocoupler U2.
The gate driver U1, the SLKOR Micro SL27517A single-channel 4A high-speed low-side driver, provides efficient and reliable driving for MOSFETs and IGBTs. With ultra-low propagation delay, compact SOT-23 packaging, and extremely low quiescent current, the device supports MOSFET switching frequencies up to several hundred kHz. It is particularly well-suited for synchronous rectification in server and telecom power supplies, as well as a wide range of industrial control applications.
4.2 Some suggestions for engineers:
The SLKORMicro gate driver chip SL27517A operates at 12V in this circuit. When pin 5 outputs a high-level signal, it drives the Saco Micro SL142N06Q MOSFET into conduction to power the load. At a 10V gate drive, this MOSFET delivers a typical 20A current capability and an ultra-low 2.6mΩ Rds(on), making it exceptionally suitable for high-speed switching control and synchronous rectification scenarios.
For resistor R3, selection should follow PCB layout considerations — here, a 100Ω value is recommended. Place R3 as close as possible to the MOSFET gate and keep routing short to reduce parasitic inductance and ensure cleaner, faster gate transitions.
The switching diode D3 is primarily used to accelerate MOSFET turn-off. Its value can be fine-tuned based on real-world switching behavior and performance requirements.
5.1 This DEMO board features a dual-layer PCB architecture. When driving the high-power MOSFET SL142N06Q in a parallel configuration, the SLKOR Micro (slkor(www.slkormicro.com)) SL27517A delivers robust current-handling performance through its output stage. To support high current and improve thermal management, the board integrates widened copper traces on both layers for enhanced heat dissipation.
Connectors CN2 and CN1 are designed for motors or laser pump modules, while CN2 and CN3 link to switching power supplies operating at up to 60V (adjustable from 12V–60V depending on application needs). Thanks to its ultra-low latency and high-speed characteristics, SLKOR Micro’s SL27517A is widely used in PWM-driven high-power MOSFET applications.
The board also features the SLKOR Micro brand logo, and users can simply scan the QR code to access real-time updates on semiconductor technologies and industry insights.
For samples or datasheet please contact : Sales03@slkormicro.com
Comments
Post a Comment