The ic could be the same, but the layout looks different to the AAA Batteriser:
https://www.eevblog.com/forum/projects/batteroo-testing/msg1097209/#msg1097209
It would be interesting to see if the circuit is identical.
The pinout looks similar, but the AA Batteriser has 2 inductors.
Could you measure if both inductors are connected in parallel or if there are two independent boost conveters? You probably have to remove one inductor when doing the measurement, because both inductors are connected to the same input voltage.
the inductors are NOT in parallel looks like each one has it's own connection to the IC
the inductors are NOT in parallel looks like each one has it's own connection to the IC
You measured they are not connected? Assuming pin 1 is top left pins 3 and 6 and 4 and 5 being common would explain AAA and AA layouts. If pins 3 and 6 are not common then maybe it is some kind of bi-phase converter.
V_in I_in V_out I_out V_Boost %Eff
1.50 0.13 1.49 0.126 -0.02 100.1
1.00 0.19 1.34 0.126 0.34 67.0
I think your efficiency calculation is wrong.
i found 30 mins or so today to do a little testing and measuring.
Setup is as follows:
PSUA (Supply), HP 6632B, CV mode supplying the Batteriser input voltage
PSUB (Load), HP 6632B, CC mode loading/sinking the Batteriser output fixed at 125mA
Both PSUs have the sense wires connected, PSUA has them inside the beige box to the banana posts, PSUB has them to the back of the banana plugs. So there will be some losses in the bits in between like plugs, clip, wire to the batteriser etc (see the attached pic).
i found 30 mins or so today to do a little testing and measuring
V_in I_in V_out I_out V_Boost %Eff
1.25 0.16 1.44 0.126 0.18 76.6
Values have been rounded!
V_in I_in V_out I_out V_Boost %Eff
1.50 0.13 1.49 0.126 -0.02 100.1
1.45 0.13 1.44 0.126 -0.02 100.1
1.40 0.15 1.47 0.126 0.07 84.8
1.35 0.16 1.46 0.126 0.11 79.4
1.30 0.16 1.45 0.126 0.14 77.1
1.25 0.16 1.44 0.126 0.18 76.6
1.20 0.16 1.42 0.126 0.22 76.9
1.15 0.17 1.40 0.126 0.25 74.5
1.10 0.17 1.38 0.126 0.28 72.1
1.05 0.18 1.36 0.126 0.31 68.6
1.00 0.19 1.34 0.126 0.34 67.0
0.95 0.19 1.31 0.126 0.37 65.0
0.90 0.20 1.29 0.126 0.39 63.3
0.85 0.21 1.26 0.126 0.41 61.1
0.80 0.21 1.23 0.126 0.43 59.3
0.75 0.22 1.20 0.126 0.45 56.8
0.70 0.23 1.16 0.126 0.46 54.3
0.65 0.24 1.13 0.126 0.47 51.9
0.60 0.26 1.08 0.126 0.49 49.1
0.55 0.27 1.05 0.126 0.49 46.5
0.50 0.29 1.00 0.126 0.50 43.6
Thanks for measuring. Corrected the last column for you.
Results are similar to Frank's measurements.
Thanks for measuring. Corrected the last column for you.
Results are similar to Frank's measurements.
V_in I_in V_out I_out V_Boost Eff%
1.50 0.13 1.49 0.126 -0.02 96.3
1.45 0.13 1.44 0.126 -0.02 96.3
1.40 0.15 1.47 0.126 0.07 88.2
1.35 0.16 1.46 0.126 0.11 85.2
1.30 0.16 1.45 0.126 0.14 87.8
1.25 0.16 1.44 0.126 0.18 90.7
1.20 0.16 1.42 0.126 0.22 93.2
1.15 0.17 1.40 0.126 0.25 90.2
1.10 0.17 1.38 0.126 0.28 93
1.05 0.18 1.36 0.126 0.31 90.7
1.00 0.19 1.34 0.126 0.34 88.9
0.95 0.19 1.31 0.126 0.37 91.4
0.90 0.20 1.29 0.126 0.39 90.3
0.85 0.21 1.26 0.126 0.41 88.9
0.80 0.21 1.23 0.126 0.43 92.3
0.75 0.22 1.20 0.126 0.45 91.6
0.70 0.23 1.16 0.126 0.46 90.8
0.65 0.24 1.13 0.126 0.47 91.3
0.60 0.26 1.08 0.126 0.49 87.2
0.55 0.27 1.05 0.126 0.49 89.1
0.50 0.29 1.00 0.126 0.50 86.9
V_in I_in V_out I_out V_Boost
....................
1.05 0.18 1.36 0.126 0.31
1.00 0.19 1.34 0.126 0.34
0.95 0.19 1.31 0.126 0.37
....................
You should solder the sense wires to the Batteriser. I measured 1.418 V for 1 V input, at 100 mA. 78 mV difference compared to your measurement is a bit high, maybe I did something wrong, too, but to be sure it should be done right. I guess there is some variation, which might be a good idea to measure, too, but 5% (relative to 1.5 V) is a bit high. My multimeter should measure much better than 1%.
Of course I wasn't serious, but the test is to compare the power output of the two devices, so the added weight means that the train running times/laps are not 100% comparable because the trains have different weights.
i opted not to change my setup, the sense wires are soldered into my banana plugs on PSUA, you might be able to see the small white sense wire tucking into the back of the plug in the pic, it would mean cutting them or fiddling around the back of the PSU to attach other sense wires and i don't really want to do that. What i did do though is reduce the length of my wires to the batteriser, made sure everything had a good connection etc and started again from scratch, so there should be a small improvement in the losses.
Of course I wasn't serious, but the test is to compare the power output of the two devices, so the added weight means that the train running times/laps are not 100% comparable because the trains have different weights.
I'm pretty sure the Batteriser weight would be within the normal weight tolerance of the batteries themselves.
Charts!