Part Number: TL2843B is there a minimum load for the output? I added a 6.8k pull down, to no effect.
The VCC is 12.5V. The Vref is steady at 4.99V.
I can see the RT/CT sawtooth - 427kHz. from pk-pk is from 2V to 3.6V (1.6Vpkpk)
FB pin is 0V
Part Number: TL2843B Hi~
Customer is under evaluating with TL2843B but undershoot at switching node was not improved and measured around -2.2V as maximum level.
Competitor device has same symptom and they want to get confirm it looks no problem.
Other Parts Discussed in Thread: TL2843B-Q1 Hello,
my customer is planning to use the TL2843B-Q1 for driving a brushed DC motor. One of the requirement is having 100% duty cycle. The datasheet mentions a MIN Duty cycle of 94%. What is the limitation for…
Part Number: UC2842A Other Parts Discussed in Thread: TL2843B , UC2842
Hi all Would you mind if we ask UC2842A and TL2843B? These devices have current limit function as follows; ・TL2843B : PWM for Cycle-by-Cycle Current Limiting ・UC2842 : Pulse-by-Pulse What…
Other Parts Discussed in Thread: TL2843B Hi all, Would you mind if we ask TL2843B? <Question> If the value of RT is less than 5kΩ(5kohm < Rt), how much of the coefficient will be? The datasheet shows 1.76.(f ≈ 1.72 / R T C T) Furthermore, our…
Other Parts Discussed in Thread: TL2843B Now we have a customer they want to design flyback topology for below 3 power rail
1. Vin 12~72V Vout 5V 30W
2. Vin 12~72V Vout 54V 80W
3.Vin 9~60V Vout 12V 50W
If all I use TL2843B, is that possible to achieve…
Other Parts Discussed in Thread: TL2843B-Q1 Hello together,
recently I had a meeting, where the customer requires a motor driver with following specifications:
Input: 12V car battery
Output: 0-12V PWM, drives one external MOSFET.
Switching Frequency approx…
David, The PN2222A transistor is fine. Is the TL2843B oscillator an exact multiple of the output oscillation?
Try this app note:
Here are some part numbers that appeared when I searched for your requirements. I recommend starting to look at UCC28600-Q1.