The goal of this test was to measure the Voled step-up efficiency, average output voltage and ripple at different loads.
Tests were done on MiniBLE v2 breakout board, with all switches off except 3V oled, discharge, bat->3V3 and BAT->8V on.
R3 & Q4 node was soldered to GND (to always enable 3V3), R18 & R2 node was soldered to 3V3 (to allow 1V2 to reach Voled stepup).
Iin measured on the power supply (calibrated and as accurate as a 4.5 digits fluke 45 multimeter), Vin & Vout measured using multimeters on the test points, Voutpkpk measured using oscilloscope, Iload was checked using a fluke 45 DMM.
1.42V was measured on the main MCU 3V3, which seems to indicate that the 3V3 domain was not consuming power.
1.00V Vin
| Load |
Iin avg |
Actual Vin avg |
Vout avg |
Vout pkpk |
Efficiency |
| 0mA |
5.8mA |
1.01V |
8.16V |
35mV |
|
| 5mA |
247mA |
1.00V |
6.78V |
650mV |
14% |
1.05V Vin
| Load |
Iin avg |
Actual Vin avg |
Vout avg |
Vout pkpk |
Efficiency |
| 0mA |
5.7mA |
1.05V |
8.16V |
32mV |
|
| 5mA |
180mA |
1.05V |
8.00V |
480mV |
21% |
| 10mA |
263mA |
1.05V |
6.29V |
552mV |
23% |
1.10V Vin
| Load |
Iin avg |
Actual Vin avg |
Vout avg |
Vout pkpk |
Efficiency |
| 0mA |
5.6mA |
1.10V |
8.16V |
32mV |
|
| 5mA |
78mA |
1.10V |
8.14V |
48mV |
47% |
| 10mA |
232mA |
1.10V |
7.97V |
450mV |
31% |
1.15V Vin
| Load |
Iin avg |
Actual Vin avg |
Vout avg |
Vout pkpk |
Efficiency |
| 0mA |
5.4mA |
1.15V |
8.16V |
32mV |
|
| 5mA |
71mA |
1.15V |
8.15V |
48mV |
50% |
| 10mA |
160mA |
1.15V |
8.12V |
90mV |
44% |
| 15mA |
277mA |
1.15V |
8.00V |
322mV |
38% |
1.20V Vin
| Load |
Iin avg |
Actual Vin avg |
Vout avg |
Vout pkpk |
Efficiency |
| 0mA |
5.3mA |
1.20V |
8.16V |
32mV |
|
| 5mA |
67mA |
1.20V |
8.15V |
50mV |
51% |
| 10mA |
134mA |
1.20V |
8.13V |
53mV |
51% |
| 15mA |
222mA |
1.20V |
8.08V |
180mV |
45% |
| 20mA |
291mA |
1.20V |
7.46V |
340mV |
43% |
1.25V Vin
| Load |
Iin avg |
Actual Vin avg |
Vout avg |
Vout pkpk |
Efficiency |
| 0mA |
5.1mA |
1.25V |
8.16V |
32mV |
|
| 5mA |
62mA |
1.25V |
8.15V |
50mV |
53% |
| 10mA |
123mA |
1.25V |
8.13V |
52mV |
53% |
| 15mA |
195mA |
1.25V |
8.11V |
52mV |
50% |
| 20mA |
276mA |
1.25V |
7.83V |
350mV |
45% |
| 25mA |
283mA |
1.25V |
6.83V |
510mV |
48% |
1.30V Vin
| Load |
Iin avg |
Actual Vin avg |
Vout avg |
Vout pkpk |
Efficiency |
| 0mA |
5.0mA |
1.30V |
8.16V |
32mV |
|
| 5mA |
57mA |
1.30V |
8.15V |
50mV |
55% |
| 10mA |
114mA |
1.30V |
8.13V |
55mV |
55% |
| 15mA |
180mA |
1.30V |
8.11V |
56mV |
52% |
| 20mA |
255mA |
1.30V |
8.10V |
44mV |
49% |
| 25mA |
312mA |
1.30V |
7.66V |
270mV |
47% |
| 30mA |
287mA |
1.30V |
6.3V |
400mV |
51% |
1.40V Vin
| Load |
Iin avg |
Actual Vin avg |
Vout avg |
Vout pkpk |
Efficiency |
| 0mA |
4.8mA |
1.40V |
8.16V |
32mV |
|
| 5mA |
62mA |
1.40V |
8.15V |
50mV |
47% |
| 10mA |
106mA |
1.40V |
8.13V |
52mV |
55% |
| 15mA |
161mA |
1.40V |
8.11V |
54mV |
54% |
| 20mA |
221mA |
1.40V |
8.09V |
54mV |
52% |
| 25mA |
290mA |
1.40V |
8.08V |
40mV |
50% |
| 30mA |
298mA |
1.40V |
7.07V |
480mV |
51% |