HackRF one Power issue?

[stoneburner]

Steps to reproduce

1. i power on my hackrf - nothing happens

Expected behaviour

it should get enumerated as usb device (again)

Actual behaviour

the 3v3 led is on, the TX led is about 50% on, no other led is on the device gets not recognized in normal mode or dfu mode it worked fine before

the big ic lpc.. gets pretty warm, i am not sure if this is supposed to happen

i have access to multimeters and oscilloscope

similar issue: #641

(i am pretty sure i killed my hackrf somehow, although i only ever connected the ANT500 to it, so an answer like, "you broke it, sorry" is also fine i will order another one anyway)

[timbakirov]

Same problem! Looks like the TPS62410 too weak (by current) for powering the entire circuit. Also, i think there is a general mistake in the schematic. TPS62410 DC-DC converter has two outputs- Vout1 and Vout2. It seems like voltage on Vout1 should be no more than 1.5V. There is no explicit warnings about this in the datasheet, but look at the Table 3. Yes, this is a setting using registers, but there is no voltage in the table greater than 1.5 volts for converter 1. Also recommended range for R46 and R55 (used in voltage setting divider) is 180 kΩ to 360 kΩ. But in circuit - 162 kΩ. Fortunately there are trace jumpers pads for connecting external supply. I use two TPS63020 (Vout 1.2 - 5.5V 4A) on tiny PCB.

[stoneburner]

Fortunately there are trace jumpers pads for connecting external supply. I use two TPS63020 (Vout 1.2 - 5.5V 4A) on tiny PCB.

can you give more details about where the jumper pads are? did you remove the old converter?

edit: found where to connect power :)

just follow the thick traces labeled REG_OUT_1 and 2

[mossmann]

Same problem! Looks like the TPS62410 too weak (by current) for powering the entire circuit. Also, i think there is a general mistake in the schematic. TPS62410 DC-DC converter has two outputs- Vout1 and Vout2. It seems like voltage on Vout1 should be no more than 1.5V. There is no explicit warnings about this in the datasheet, but look at the Table 3. Yes, this is a setting using registers, but there is no voltage in the table greater than 1.5 volts for converter 1. Also recommended range for R46 and R55 (used in voltage setting divider) is 180 kΩ to 360 kΩ. But in circuit - 162 kΩ. Fortunately there are trace jumpers pads for connecting external supply. I use two TPS63020 (Vout 1.2 - 5.5V 4A) on tiny PCB.

We are using the TPS62410 within specifications.

[mossmann]

@stoneburner Do you still have an issue with your HackRF One?

[stoneburner]

no, i just replaced the TPS62410 with a new one, works fine again now, thanks!