Part Number: TPS5420 I am using an open drain mosfet to control en (pin 5) on controller. Sometimes the chip doesn't start - no output. The mosfet I am using is a ROHM SM6K2. It is maximum leakage of 1uA at 60v. I am turning him off with another SM6K2…
Part Number: TPS5420 I am having a conversation with co-worker. He told me that diode is unnecessary because lower sync fet will catch current. I say that it is easier to commutate a schottky diode than the intrinsic diode in the sync fet. I would imagine…
Part Number: TPS5420 Other Parts Discussed in Thread: TPS5410 The TPS5420 datasheet shows a layout on page. In this layout the input capacitor is on one side of the chip while the output inductor and output capacitor is opposite. This puts the controller…
It looks like the primary difference is in the 80 MHz range. Check the PH node waveform to look for any ringing in that frequency range. If it is present a snubber may help. You can also check the layout to ensure the circulation current paths are…
Other Parts Discussed in Thread: TPS5420 , LM3480 Attached is my schematic. This is an automotive IoT device that will connect to the headers on a raspberry Pi. It will sniff the can bus on Semi Trucks and collect data from the internal controllers and…
Other Parts Discussed in Thread: TPS5420 Hi,
I intend to use the TPS5420 to buck a 18-22V to 6V@1A
I checked both the datasheet and the EVM usersguide
Formula 7 and 8 in the datasheet are to determine the ESR-max value. Calculating back from the datasheet…
Other Parts Discussed in Thread: TPS5420 , TPS54678 , TPS5430 Hi, Could you tell me about TPS5420/30 hiccup mode timing? There is the following description in datasheet. But,Time to enter the mode is not described. Please tell me the time to enter the hiccup…
Other Parts Discussed in Thread: TPS5420 Hello, I have a problem when using the TPS5420. I want to convert the 28V to 15V and 24V. Using the different ration of R1 and R2 to reach the goal. Here is the schematic of the test board. Resistor R1 is 10k ohm…
Other Parts Discussed in Thread: TPS5420 , TPS5410 Do the TPS5420 and TPS5410 need a heat sink at there maximum current. My design used 3 TPS5420 and 1 TPS5410. So far during testing the resistors just get hot but the chips seem fine?
Thanks