# UC3825 MOSFET PWM Driver ## Description UC3825-based adjustable 10 kHz PWM generator with potentiometer frequency and duty control, plus a 0-15 V MOSFET gate-driver output stage. ## Project Details - **Owner:** pascalsballs - **Created:** 4/23/2026 - **Last Updated:** 4/23/2026 - **Visibility:** Public ## Key Components ### J1 — [2-Position Screw Terminal](https://www.flux.ai/corynrobinson/2-position-screw-terminal~s4.md) - Package: 5.0mm terminal block - Manufacturer Part Number: 691137710002 - Role Details: Provides GATE_OUT and PGND connection to external MOSFET stage - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Manufacturer Name: Würth Elektrik - Part Type: Connector - Role: Output Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### J2 — [2-Position Screw Terminal](https://www.flux.ai/corynrobinson/2-position-screw-terminal~s4.md) - Part Type: Connector - Manufacturer Part Number: 691137710002 - Package: 5.0mm terminal block - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Manufacturer Name: Würth Elektrik - Role Details: Provides GATE_OUT and PGND connection to external MOSFET stage - Role: Output Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### RV1 — [3224W-1-104E](https://www.flux.ai/jharwinbarrozo/3224w-1-104e~do.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810271112_BOURNS-3224W-1-103E_C81348.pdf - Role Details: 100k potentiometer used as adjustable resistance in UC3825 frequency control path - Manufacturer Part Number: 3224W-1-104E - Package: SMD - Resistance: 100kΩ - Role: Frequency Control - Part Type: Resistor - Manufacturer Name: Bourns **Pins:** - P1 - P2 - P3 ### U1 — [UC3825DW](https://www.flux.ai/lcsc/uc3825dw~sixh.md) - Role Details: UC3825 controller generating adjustable PWM for MOSFET driver stage - Manufacturer Part Number: UC3825DW - JLCPCB Part Class: Extended Part - Package: SOIC-16 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Texas-Instruments-UC3825DW_C107654.pdf - Role: PWM Controller - Package or Case Code: SOIC-16_L10.3-W7.5-P1.27-LS10.3-BL - LCSC Part Number: C107654 - Part Type: DC-DC Controllers - Manufacturer Name: TI(德州仪器) **Pins:** - CLOCK [pin 4] - CT [pin 6] - E/AOUT [pin 3] - GND [pin 10] - ILIM/SD [pin 9] - INV [pin 1] - NI [pin 2] - OUTA [pin 11] - OUTB [pin 14] - PWRGND [pin 12] - RAMP [pin 7] - RT [pin 5] - SOFTSTART [pin 8] - VC [pin 13] - VCC [pin 15] - VREF5.1V [pin 16] ### U2 — [UCC27511ADBV](https://www.flux.ai/kicad-part-library/ucc27511adbv~be.md) - Manufacturer Part Number: UCC27511ADBV - Package or Case Code: SOT-23-6 - Role Details: Amplifies UC3825 PWM output to strong 0-15 V gate drive for external MOSFET stage - Datasheet URL: https://www.ti.com/lit/ds/symlink/ucc27511a.pdf - Role: Gate Driver - Package: SOT-23-6 - Manufacturer Name: Texas Instruments Inc. **Pins:** - GND [pin 4] - IN- [pin 5] - IN+ [pin 6] - OUTH [pin 2] - OUTL [pin 3] - V_{DD} [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/pascalsballs/uc3825-mosfet-pwm-driver~at](https://www.flux.ai/pascalsballs/uc3825-mosfet-pwm-driver~at).* --- *Generated from [https://www.flux.ai/pascalsballs/uc3825-mosfet-pwm-driver~at](https://www.flux.ai/pascalsballs/uc3825-mosfet-pwm-driver~at)*