Part Number: LM5158 Tool/software: Hi, Staff
I'm designing boost convertor.
Vsupply range is from 25.5V to 46.0V
Vload range is from 47.05V to 49.96V.(Typ. 48.5V)
Target Fsw is about 500KHz.
In Vsupply is 46.0V and Vload 47.05V, PWM Duty is 3.25…
Hi Reddy,
The compensation might be a root cause for this.
Please try to adjust the values (after taking the scopeshots) to Rcomp=8k, Ccomp=10nF, Chf=22pF
Best regards
Moritz
Part Number: LM5158 Tool/software: WEBENCH selects a transformer VP2-0066R from Eaton, but calculates the wrong series resistances.
I entered the following data to WEBENCH:
VinMin = 16.0V
VinMax = 32.0V
Vout = 4.0V
Iout = 1.5A
Device = LM5158RTER
Topology…
Part Number: LM5158 Tool/software: Hello,
I understand that the Hiccup Mode uses timer for fault. Please can you confirm that the Hiccup Mode timer is based on Switching Freq selected in the application.
Part Number: LM5158 Tool/software: I’m working on a boost circuit for PoE type II PSE (30W). The following parameters are required:
Vin: 12V-24V
Vout: 52V, 0.6A
The Webench designed it using a 97µH(21.56mΩ) inductor, which is pretty large.…
Part Number: LM5158Lm5158 datasheet states that it has over-voltage protection when FB pin voltage exceeds Vref by 10%. Please share what is LM5158's behavior if top-side feedback resistor gets open.
Hi Jimmy,
You can see in the scopeshot, that the softstart is pulled down, so the device starts from new every time. The question is why.
Please send scopeshots as i requested above: Vout, SS, UVLO and COMP.
Please do these measurements wit one channel…
Part Number: LM5158
Tool/software:
Hi,
Please review the Boost converter design with LM5158. This is done to for PSE controller to power 90W POE++ device.
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Part Number: LM5158 Hello guys,
One of my customers is looking for a boost regulator which can be used as a power supply for PSE side of PoE.
Their requirements are the follows. Vin=12V or 24V. Vout=37V~57V. Io=0.350A. Pout=13W.
I think LM5158 can be used…