User manual

Functional description VL6180X
26/79 DocID026171 Rev 6
2.11.3 Current distribution
Table 12. shows how current consumption is distributed between the two supplies in ranging
mode. AVDD_VCSEL supplies the VCSEL current and AVDD supplies all other functions.
Note: The VCSEL driver is pulsed at 100 MHz with a 33% duty cycle (see Figure 15.) so average
current consumption on AVDD_VCSEL is one third of the peak.
Figure 15. VCSEL pulse duty cycle
Table 12. Current consumption on AVDD and AVDD_VCSEL
Power supply
(1)
1. Normally, both supplies will be driven from a common source giving a peak instantaneous current demand
of 38 mA.
Current Note
AVDD 14 mA Average during active ranging
AVDD_VCSEL 8 mA
(2)
2. Peak emitter current during ranging is 24 mA.
Average during active ranging (33% duty cycle).
33% duty cycle
10 ns
24 mA peak current
8 mA average current