# GaN Laser Pulse Driver ## Description Dual GaN current-steering pulsed laser diode driver using a PXIe SMU as a continuous 100 mA current source, targeting >=10 ns pulse width and <10 ns edges. ## Project Details - **Owner:** shapicbee - **Created:** 6/12/2026 - **Last Updated:** 6/15/2026 - **Visibility:** Public ## Key Components ### J1 — [SMA-J-P-H-ST-EM1](https://www.flux.ai/jecstronic/sma-j-p-h-st-em1~0a1.md) - Datasheet URL: http://suddendocs.samtec.com/catalog_english/sma.pdf - Manufacturer Part Number: SMA-J-P-H-ST-EM1 - Part Type: Connector - Manufacturer Name: Samtec Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Controlled Impedance: 50ohms - Role: Pulse Input **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J2 — [691137710002](https://www.flux.ai/adrian95/691137710002~c39.md) - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Würth Elektronik - Role Details: PXIe SMU 100mA constant-current input connector; J2-1=SMU+, J2-2=SMU-/GND - Role: Power Conversion - Manufacturer Part Number: 691137710002 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J3 — [691137710002](https://www.flux.ai/adrian95/691137710002~c39.md) - Manufacturer Part Number: 691137710002 - Role: Power Conversion - Role Details: External 5V supply for STDRIVEG600 logic/driver rail; J3-1=+5V, J3-2=GND - Manufacturer Name: Würth Elektronik - Part Type: Connector - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] ### LD1 — [SPL_PL90](https://www.flux.ai/kicad-part-library/splpl90~ri4.md) - Max Current: 100mA - Forward Voltage: 1.4V - Package or Case Code: LED_D5.0mm - Manufacturer Name: Texas Instruments Inc. - Role Details: Pulsed laser diode load, Vf=1.4V, Ipk=100mA, >=10ns pulse width - Role: Laser Diode - Part Type: LED THT - Manufacturer Part Number: SPL_PL90 - Datasheet URL: https://look.ams-osram.com/m/2e6f6e5edf55ddfe/original/SPL-PL90.pdf **Pins:** - A [pin 2] - C [pin 1] ### Q1 — [SISS52DN-T1-GE3](https://www.flux.ai/adrian95/siss52dn-t1-ge3.md) - Manufacturer Part Number: SiSS52DN-T1-GE3 - Role Details: Laser path low-side switch; library placeholder is silicon MOSFET and must be replaced by selected GaN FET MPN - Datasheet URL: https://www.vishay.com/docs/79977/siss52dn.pdf - Manufacturer Name: Vishay - Role: Placeholder GaN FET - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistors **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - D_6 [pin 10] - D_7 [pin 11] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### Q2 — [SISS52DN-T1-GE3](https://www.flux.ai/adrian95/siss52dn-t1-ge3.md) - Datasheet URL: https://www.vishay.com/docs/79977/siss52dn.pdf - Part Type: Transistors - Role Details: Dummy path low-side switch; library placeholder is silicon MOSFET and must be replaced by selected GaN FET MPN - Manufacturer Name: Vishay - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SiSS52DN-T1-GE3 - Role: Placeholder GaN FET **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - D_6 [pin 10] - D_7 [pin 11] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### RG1 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Role: Snubber / Damping - Part Type: Resistor - Package: SMD_0402_1005Metric - Resistance: 2.2ohms **Pins:** - P1 [pin 1] - P2 [pin 2] ### RG2 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Role: Snubber / Damping - Package: SMD_0402_1005Metric - Resistance: 2.2ohms - Part Type: Resistor **Pins:** - P1 [pin 1] - P2 [pin 2] ### RS1 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Role: Sensing (Shunt) - Part Type: Resistor - Power Rating: 0.1W - Resistance: 1ohms - Role Details: Laser path sense resistor; 100mV at 100mA peak - Package: SMD_0603_1608Metric **Pins:** - P1 [pin 1] - P2 [pin 2] ### RS2 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Part Type: Resistor - Power Rating: 0.1W - Role Details: Dummy path sense resistor; verifies standby 100mA current - Resistance: 1ohms - Role: Sensing (Shunt) - Package: SMD_0603_1608Metric **Pins:** - P1 [pin 1] - P2 [pin 2] ### RT1 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Part Type: Resistor - Controlled Impedance: 50ohms - Role: Impedance Matching - Resistance: 50ohms - Package: SMD_0402_1005Metric **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [STDRIVEG600](https://www.flux.ai/adrian95/stdriveg600.md) - Datasheet URL: https://www.st.com/resource/en/datasheet/stdriveg600.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Role: GaN Gate Driver - Symbol Style: parametric-v1 - Manufacturer Name: STMicroelectronics - Manufacturer Part Number: STDRIVEG600 - Role Details: Drives complementary laser and dummy low-side GaN switches from SMA pulse input **Pins:** - ~SD~/OD [pin 2] - BOOT [pin 16] - HIN [pin 3] - HOFF [pin 14] - HON [pin 15] - LIN [pin 1] - LOFF [pin 10] - LON [pin 11] - NC_1 [pin 6] - NC_2 [pin 8] - NC_3 [pin 12] - OUT [pin 13] - PGND [pin 9] - PVCC [pin 5] - SGND [pin 7] - VCC [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/shapicbee/gan-laser-pulse-driver~d6](https://www.flux.ai/shapicbee/gan-laser-pulse-driver~d6).* --- *Generated from [https://www.flux.ai/shapicbee/gan-laser-pulse-driver~d6](https://www.flux.ai/shapicbee/gan-laser-pulse-driver~d6)*