Hi Unnimaya,
Synchronous controller means the device has one low side and one high side switch. Asynchronous controller means the device has only one low side switch; the high side has a forward diode instead.
Latter controller is more common for Flyback…
Hi Sanjay,
Thanks for the feedback.
If the VCC pin is not supplied from an aux winding of the transformer, it will be generated internally through an LDO from the BIAS voltage. In this case, VCC is just connected to a capacitor to GND. At high input voltages…
Hello Sekar D,
We do not have an LM5156 flyback EVM, but you could use the LM5155 flyback EVM as reference. The devices are almost the same and can often be used on the same layout. Please find the LM5155 EVM here: LM5155EVM-FLY Evaluation board | TI.…
Hello David,
Please have a look at LM5156.
Here you can find the EVM of LM5155, which is pin compatible to LM5156. LM5156 has DRSS which I in general recommend: LM5155EVM-FLY Evaluation board | TI.com
Best regards, Brigitte
Part Number: LM51561 Other Parts Discussed in Thread: PMP22764 , Hi support team,
I use LM51561 isolated flyback for PSE power supply of PoE.
・Input voltage：DC18V～38V
・Output power: 46W or more
・Output voltage: 54V
But I'm having problems with EMI testing…
Hi ACGUY,
I am not sure I follow with your question, is the question whether or not there is no mistake in the user's guide regarding the Vout and FB circuit not being connected? the answer to which is yes in the schematic as you see in the LM5157EVM…
Hello Dice-K,
LM5155 can be used for this application.
Here you can find an application note how to create an isolated flyback with LM5155: https://www.ti.com/lit/pdf/snva866
Here you can find a calculator that follows these formulas: https://www.ti.com…
Hello BAI LI,
Is the output voltage stable when you increase the load (reduce the resistance?)
In general, ringing on the switch node is normal as soon as there is no more current in the transformer. But I would have expected that the higher load causes…
