Part Number: LM51551-Q1 Tool/software: Hello,
I have made a power supply using LM51551-Q1 with Flyback configuration. I am simulating the circuit in TINA TI. The issue is IC is not producing any output. Don't know whether its a TINA TI simulator issue…
Part Number: LM51551-Q1 Tool/software: Dear Engineers,
I want to use this reference design (PMP40488 ) for one of my application.
I noticed if I used coupled inductor for L3 and L4 I will get better performance and the value of the positive rail and…
Part Number: LM51551-Q1 Tool/software: Dear Engineers,
I wan to make the output of the following circuit variable:
I plan to use a digital potentiometer as follows:
Digital Potentiometer 50k Ohm 1 Circuit 64 Taps I2C Interface 10-MSOP
https://www…
Part Number: LM51551-Q1 Tool/software: Dear Engineers,
In the following reference design form TI, would you please let me know what is the role of R4 and R10?
Should I consider them as load?
The Previous stage is an PI filter, for filtering the high…
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! …