Tool/software: TINA-TI or Spice Models
Hello,
I am making a SPICE simulation using the LMG1205 device and noticed voltage in excess of 6.2v when driving a GaN FET. I am using the high-side switch with a 0.1uF bootstrap capacitor.
While looking into the SPICE model I noticed that the HB node is clamped to 7.2v relative to HS. Is this normal ? The datasheet specifies maximum of 5.25V. Can you please confirm that 5.25v is the maximum HB - HS voltage. Can I simply change the 7.2V threshold in the SPICE model ?
Here is the line in the SPICE model where I noticed the 7.2V:
E_U1_ABM2 U1_N16504999 0 VALUE { if( V(HB) - V(HS) < 7.2,
+ 1, 0) }
Here is the file revision I am using (latest from the Website):
* Released by: WEBENCH Design Center, Texas Instruments Inc.
* Part: LMG1205
* Date: 3/29/2017
* Model Type: Transient
* Simulator: PSPICE
* Simulator Version: 16.2
* EVM Order Number:
* EVM Users Guide:
* Datasheet: SNOSD37 –JANUARY 2017
* Model Version: Final 1.0
Hi Somen,
Here is the schematic of the circuit. The 6.2v is measured between the HB and HS node. Let me know if you have any questions.
