Switching power efficiently is mostly about driving the gate fast and cleanly. Too little gate current and the MOSFET lingers in its linear region, heating up; too much and you add ringing and EMI. This guide covers MOSFET gate drivers and 600 V high-voltage drivers from COSINE (科山芯创) we stock.
1. MOSFET gate drivers
These buffers supply the peak current the gate needs, with defined logic thresholds and drive strength.
| Part | Notes | Link |
|---|---|---|
| COS4422SR (TC4422) | MOSFET gate driver, dual | COS4422SR (TC4422) |
| COS4421SR (TC4421) | MOSFET gate driver | COS4421SR (TC4421) |
| COS3122SR (FAN3122) | MOSFET gate driver | COS3122SR (FAN3122) |
| COS27425SR (TC4425) | MOSFET gate driver, dual | COS27425SR (TC4425) |
2. 600 V high-voltage gate drivers
Half-bridge and full-bridge supplies need a high-side driver with a bootstrap supply. These parts cover the 600 V class.
| Part | Notes | Link |
|---|---|---|
| COS2184S (IRS2184) | 600 V half-bridge gate driver | COS2184S (IRS2184) |
| COS21844S (IRS21844) | 600 V high-voltage gate driver | COS21844S (IRS21844) |
| COS2113PBF (IRS2113) | 600 V half-bridge gate driver | COS2113PBF (IRS2113) |
Selection checklist
- Calculate gate charge and your target switching time to size peak current.
- Decide low-side versus half-bridge from the topology.
- Confirm the driver supply and input logic match your controller.
- Check the bootstrap capacitor and dead-time handling in your layout.
See the wider power management range. Send us your topology, voltage and package for a quote.
Frequently asked questions
Why do I need a MOSFET gate driver at all?
A MOSFET gate is a capacitor. To switch quickly you must move charge into and out of it fast, and a microcontroller pin cannot. A gate driver is a buffer that supplies the peak current, so the MOSFET spends as little time as possible in its linear region, which limits switching loss and heat.
What is the difference between a low-side and a half-bridge driver?
A low-side driver switches an N-channel MOSFET to ground. A half-bridge (high-side/low-side) driver switches a high-side MOSFET whose gate must be driven above the supply, which needs a bootstrap or charge-pump supply that IRS2184 and IRS2113 class devices integrate.
How much peak current do I need from the driver?
Divide the gate charge by your desired rise time to get the average current, then choose a driver with peak rating comfortably above that. Under-driving the gate causes slow switching and extra loss; over-driving can stress the gate.
Are these COSINE parts drop-in replacements?
They are designed against the pinout and function of the referenced devices. Confirm package, pinout and voltage ratings on the datasheet for your application before volume commitment.
About us & trademarks: JTDZ Tech (Shenzhen Jingteng Electronics Technology Co., Ltd.) is an independent distributor of electronic components. We are not an authorised distributor or representative of the manufacturers named in this article. Manufacturer and part names are used for indicative purposes only, to help identify the components discussed; all trademarks remain the property of their respective owners. Always verify specifications against the official datasheet before design-in or purchase.
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