Part Number: LM51551-Q1 Hi Experts,
Could you share the reference design for this requirements? Thanks.
1. Input voltage: 150-900V, Output voltage: 14V, Output current: 3A
2. Topology: Flyback, secondary feedback
3. <3A output: work on voltage source;…
Part Number: LM51551-Q1 Other Parts Discussed in Thread: LM51551 hi expert
i saw this APP note Basic Calculation of a Coupled Inductor SEPIC Power Stage . i have two questions.
Q1: how to choose D value? Dmax or Dmin?
Q2: if using coupled inductor, how to…
Part Number: LM51551-Q1 Other Parts Discussed in Thread: LM51551 , LM5155 hi expert
i saw the VCC pin function from datasheet--"Output of the internal VCC regulator and supply voltage input of the MOSFET driver. Connect a ceramic bypass capacitor from…
Part Number: LM51551-Q1 Other Parts Discussed in Thread: LM5155 Hello,
The LM5155 is a peak current mode control IC, the minimum ON time is 50ns by the datasheet, but I am unable to find what is the leading edge blanking time. Could you please let me know…
Part Number: LM51551-Q1 Hi team
May I ask what this two spec means in datasheet? Is this mean the SW voltage will be 0.25V lower than VCC supply voltage when 100mA sinking?
MOSFET DRIVER
High-state voltage drop 100 mA sinking 0.25 V
Low-state voltage…
Part Number: LM51551-Q1
For the application of flyback, there is an issue. When the flyback's load is light, the transformer whistling.
Then I measure the SW of LM51551-Q1, the duty cycle is one big, one small.How can I handle this issue? Thanks! …
Part Number: LM51551-Q1 Other Parts Discussed in Thread: LM51551 Hi Team,
My customers are using LM51551-Q1 to generate a 18V voltage from a 12V battery. However, during start up when the Vin is only 6V the LM51551 cannot successfully start up and the…
Part Number: LM51551-Q1 Other Parts Discussed in Thread: LM5155 , LM5121 Hi,
I am designing a 200W boost converter from 12/24V to 50V. Most of the time, the converter will operate around 60W, but sometimes it will need to provide 150-170W for several minutes…
Part Number: LM51551-Q1 Other Parts Discussed in Thread: LM51551 Hello team,
My customer want to confirm the failure mode of LM51551.
1. GATE output not in specification-voltage or timing:
Do this mean the PWM width is wrong or PWM duty is wrong or frequency…
Part Number: LM51551-Q1 Other Parts Discussed in Thread: LM5155 For the application of flyback, the primary side output(VPRI_5V0) current load will influence the second side output voltage VISO_P18V,VISO_N5V,VISO_12V0,VISO_5V0_REF.
The output voltage…