We are evaluating LT8364EMSE, but it's not work as I expected.
Where we expected it to run at 2MHz, it only ran at 1MHz.
We was wondering if anyone has had a similar situation and solved it.
If anyone out there does, any information would be appreciated!
We arranged the recommendation circuit like below that is included in the datasheet of LT8364.
<Result of recommendation circuit>
・Stabilized output voltage of 12 V at input voltages from 8 to 14 volts, operating at about 1 Mhz.
・When the output current was varied from 0 to 600mA with constant register mode of electronic load device, it was possible to stably extract from 0 to about 500 mA, but the output voltage began to drop from about 560 mA.
・There was no significant fluctuation in the load-side DC current when the voltage began to drop, and the switching waveform appeared to be operating at a duty corresponding to the output voltage.
・We tried sync/mode grounded and ungrounded, neither runs at 2MHz but 1MHz.
<additional adjustment #1>
・Since the oscillation frequency was half speed, assuming that the protection circuit of the IC might be working due to the inductor saturation, we changed the 2.2uH inductor to 3.3uH(*), but the oscillation frequency remained at 1MHz with no significant change
*L1 and L2 were both changed. Also, R2=154K, R4=15K, and C4=3.3nF remained.
<additional adjustment #2>
・We changed the 20KΩ for frequency setting to a smaller one for the purpose of increasing the frequency and LT8364 was damaged.