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HP HSTNS-PL33 OUTPUT VOLTAGE MODIFICATION

 

Output voltage adjustment tested on HP HSTNS-PL33; PN684530-201; PS-2152-1C-LF rev. 1 and X3.1.

HP HSTNS-PL33 has 12,2V/125A factory value of output. For a LDMOS power amplifier supply is necessary to install 4pcs PSU (series). Output voltage required is 12,5V (12,5Vx4=50V). Don't forget, 3 PSUs need to have floating output. GND screws located on secondary sides must to be isolated from earth connection.

The output voltage is changed adjusting the reference voltage of TSV994 operational amplifier. Value of resistor 5K11 (marking 69B) will be decreased by parallel connection with a new 100K resistor. Don't touch the trimpots because the setpoint of over current protection will be affected.




 


HP HSTNS pinout connection and Power ON jumper
SMPS Controller PCB
HP HSTNS-PL33 Main Board
RS232/PLC Module can be removed for less EMI

 


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