SL27517A Motor Drive Solution by SLKOR Micro: Efficient and Compact

 

Shenzhen SLKOR Micros lkor(www.slkormicro.com) Semicon Co., Ltd., a technology powerhouse with Tsinghua University alumni as its core team, drives innovation through cutting-edge materials, advanced processes, and next-generation products. The company has mastered world-leading third-generation silicon carbide power device technology. As an integrated high-tech enterprise specializing in electronic product design, development, manufacturing, and sales, SLKOR Micro delivers reliable solutions and comprehensive technical support to its clients.

1.1 Name: Sacowei SL27517A driver MOSFET solution

1.2 Applications: power tools, motor control, AC/DC converter, industrial control, etc

2. Performance parameters are benchmarked and highly compatible

2.1 Symmetric drive capability

The SLKOR Micro SL27517A is a 4A single-channel gate driver with several significant advantages over TI's UCC27517DBVR (TI Texas Instruments). The main performance is reflected in the compatibility of performance, cost control, design flexibility and supply stability.

The SLKOR Micro SL27517A provides a 4A peak current (symmetric drive) at VDD=12V, which is completely consistent with the 4A source/drain current capability of the UCC27517. It can efficiently drive power devices such as MOSFET and IGBT, and is suitable for switching power supplies, DC-DC converters and other scenarios.

The SLKOR Micro SL27517A can operate over a wide voltage range of 4.5V to 20V, slightly better than the UCC27517 (TI Texas Instruments) parameter of 4.5V to 18V, and is particularly adaptable in low voltage or battery powered scenarios (such as portable devices).

2.2 Low delay and high speed response

Both the SLKOR Micro SL27517A have short propagation delay (typically 12ns) and fast rise time (6ns/11ns) to ensure minimal switching losses, suitable for high frequency applications such as digital power supplies and GaN device drivers.

3. Design flexibility and security improvement 3.1. Dual input configuration and power consumption

The SLKOR Micro SL27517A supports in-phase (IN-) or out-of-phase (IN+) input mode, and can be flexibly adapted to different logic control requirements through the dual-pin design to simplify circuit design.

3.2 Suspended input protection

When the input pin is suspended, the SLKOR SL27517A output automatically locks the low level to avoid the power tube being triggered by mistake and enhance the system reliability.

3.3 Low static power consumption

The static current is minimal, especially suitable for battery powered or low power consumption scenarios (such as solar equipment, UPS).

 

 

4. Slkor Micro SL27517A is a typical application in high power drive scenarios

 

 

 

Application principle:

4.1 The input modulation signal drives a PWM waveform to the SLKOR Micro PC817 optocoupler U2. During high-level 2-pulse waveforms, the optocoupler operates at approximately 6mA (5V control can be achieved by adjusting the resistance values of current-limiting resistors R6 and R8). The optocoupler primarily serves signal isolation, with its power supply provided by the SLKOR Micro slkor(www.slkormicro.com) LM2596S-5.0 DC-DC power management module. External modulation signals can be generated by the PL component, while D1 functions as a SLKOR Micro switching diode for freewheeling. When the modulation signal is reversed, the diode conducts to protect the optocoupler U2. The gate driver chip U1 is the SLKOR Micro SL27517A single-channel 4A high-speed low-side driver, which efficiently and safely drives MOSFETs and IGBTs. Featuring low propagation delay, compact SOT-23 packaging, and minimal quiescent current, this chip enables MOSFET switching frequencies up to hundreds of kHz. It is particularly suitable for synchronous rectification drivers in server and communication power supplies, as well as industrial 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, it drives the MOSFET Saco Micro SL142N06Q to conduct and power the load. When driving at 10V gate voltage, the MOSFET exhibits typical leakage current values 20A,2.6mΩ with low internal resistance, making it ideal for high-speed switching control and synchronous rectification applications. The resistor R3 should be selected based on PCB layout requirements—here a 100Ω component is recommended. Position R3 close to the MOSFET's gate with short routing paths to minimize parasitic inductance. The switching diode D3 primarily accelerates MOSFET turn-off, with its value adjusted according to actual operational needs.

 

 

 

 

5. The DEMO board corresponding to the gate driver of SLKOR SL27517A is shown in the figure below

 

The gate driver of SLKOR SL27517A corresponds to the physical picture of the DEMO board

 

5.1 This DEMO board features a dual-layer PCB design. When driving the high-power MOSFET SL142N06Q in parallel configuration, the SLKOR Microslkor(www.slkormicro.com SL27517A can handle substantial current through its terminals. The board incorporates expanded copper traces on both sides to enhance heat dissipation and manage high currents. Components CN2 and CN1 are connected to motors or laser pumps, while CN2 and CN3 interface with switching power supplies operating at [sensitive term] 60V (adjustable to 12V-60V as required). The low-latency characteristic of SLKOR Micro's SL27517A makes it widely adopted for PWM-driven high-power MOSFETs. The board displays the SLKOR Micro brand logo, allowing users to scan the QR code for real-time updates on semiconductor industry developments.

 

For samples or datasheet please contact : Claire@slkormicro.com