Part Number: LM2678 I am using an LM2678SD-12 with the recommended Vishay Sprague 594D series capacitors. My input voltage is 24VDC. I have had 2 capacitors fail now over a period of months of development with this same circuit on two separate boards…
Part Number: LM2678 Hello,
i design 1.2 v to 36 vout and 5a power supply ....actually already design one circuit using ic lm2678adj.
Without load, every thing works fine, but with rising load, the voltage drops. Wth 1.5 Amps, i have only 15V.
An…
Part Number: LM2678 HI,
i design 1.2 v to 36 vout and 5a power supply ....actually already design one circuit using ic lm2678adj...its working to without load am getting the voltage 1.2 v to 36v.but when i was connected to load rheostat (50 ohm and…
Part Number: LM2678 Hi
My customer has question.Please cooperate me.
Problems have occurred with the following spec.
Vin=24V
Vout=3.3V(fix)
Cin=220uF/Cout40uF
L=33uH
A phenomenon occurs in which the output voltage increases at no load. …
Ambreesh Tripathi said: Hi Mike ,
Refer to Section 8.2.2.1 of the datasheet for detail on choosing the capacitor .
Once you figure out the inductance value ie lets suppose for 3V output - 33uH inductance you can see there are four options ie to either…
Part Number: LM2678 Hi
Problems are occurring at customer's board.
Hope to cooperate.
Please see the attached file.
LM2678.pdf
An abnormal overshoot / undershoot occurs when the input voltage is in the range of 10 to 20 V. Customers's Board…
Other Parts Discussed in Thread: LM2678 Hello, The pin assignment of LM2678 on the webench is diffrence from the datasheet pin assignment. Could you please revise the pin assignment on the webench? Best Regards, Ryuji Asaka
