STEVAL-IHT008V1 power
supplies and typical
consumption
UM2027
18/37
DocID029048 Rev 1
For
Figure 14: "Inrush current during STEVAL-IHT008V1 startup on 230 V line
(500 µF output DC capacitor)"
, the output current of the horizontal axis gives the
extra current sunk from the output voltage when one ACS switch is ON. This
means that for a zero current, a current close to 20 mA is already sunk from the
VCC_AC supply. This is not the case for the VCC_INS output.
The maximum VCC_AC voltage is reached when the SMPS 15V_DC output is loaded to
the maximum output current (500 mA), while only one AC switch is ON. Indeed if more
ACS switch gate currents are sunk from VCC_AC, this level decreases.
Figure 12: Typical output characteristics of the 5 V and 15 V positive supplies (5V_DC /
15V_DC)
Figure 13: Typical output characteristics of the 5 V negative supply (VCC_AC) and 5 V
insulated supply (VCC_INS)
