Other Parts Discussed in Thread: TPS40077 Hi Team,
I'd like to ask about TPS40077.
In datasheet P.12, there is following description about series resistor of SW pin.
If this series resistor is more than 1.5Ω, is there any concern?
Best…
Cynthia,
It means that we do not have a simulation model for the device. So, at this time, you cannot run a simulation of the TPS40077. This should not preclude using the device for a design. The datasheet, EVM, and other technical documents may be…
Other Parts Discussed in Thread: TPS40077 Hi,
During my HALT test, TPS40077 failed at 85 degree C, then I tried to change the output capacitor. In the pervious design, I use the Aluminum Electrolytic Capacitor, then I changed to use the Tantalum capacitor…
Hi Peter-san, Martin-san,
Thank you for your kindness.
I checked TPS40077_EVM behavior but couldn't see the same glitch.
My customer thinks this glitch level depends on external FET.
I'll check your request with my customer.
Best Regards…
Other Parts Discussed in Thread: TPS40077 hi,
As I use the tps40077 in my system, it's for the dc-dc 24v-15v. As I test this circuit in the constant load(4A), it works fine, but my real load is the 1khz pwm output, Irms=1.5A. As the pwm output stage…
What is the maximum pull down current through the open drain fet of the pgood output? Could you please clarify what the Vpg characteristic is in the data sheet?
Thanks for the help.
Hi Team,
I'd like to ask about the recommended value of LVBP bypass capacitor.
I found the following description in datasheet P.12.
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On the other hand, I also…
Hi Kensuke,
I think the 50nC LDRV gate charge is under the minimum gate drive voltage. Although DBP is 8V typical, that is when VDD>10V. If the UVLO is programmed to be much lower, e.g. 4.5V, then the part will be powered on when VDD=4.5V, then DBP…
Hi Chuck,
The feedforard feature is based on the assumption that VDD=VIN. The PWM ramp slope is proportional to VDD, not directly to VIN. If VDD is tied to aux supply instead of VIN, the PWM ramp slope will not be proportional to VIN, hence losing the…
Other Parts Discussed in Thread: TPS40077 I was working with the TPS40077 over the full temperature range of -55 to 120. The MOSFET Rds_on within this temperature range shifted from 11mOhms to 40mOhms.
-The current limit of this device is not meant…
