UM-B-141
DA14531 SMARTBOND TINY™ MODULE Development
Kit Hardware User Manual
Target
User Manual
Revision 1.1
11-05-2020
CFR0012
11 of 29
© 2020 Dialog Semiconductor
5
DA14531 SmartBond TINY™ Module Daughterboard
5.1
Power Section
The power supply on the
DA14531 SMARTBOND TINY™ MODULE DB supports three options:
●
Power supply from DA145xx DEVKT-P PRO-MB. The supply voltage comes from VLDO setup
(U5) with output voltage range to meet recommended operating conditions of DA14531
SmartBon
d TINY™ Module. See [2] for recommended operating conditions and Table 6 for
VLDO selection.
●
Power supply from Coin cell battery (BT1). Battery case is mounted on bottom side of the
daughterboard.
Notice
:
User must not mount coin cell battery when daughterboard is
supplied from DA145xx DEVKT-P PRO-MB.
●
+5V USB Power Supply (J6 connector) with Over Voltage Protection Circuit (OVP).
Optional.
Using power supply from VLDO of DA145xx DEVKT-P PRO-MB, allows user to measure Current
drawn from the
DA14531 SmartBond TINY™ Module by using the current sensing circuit and the
power profiler of Dialog’s SmartSnippets Toolbox. For more information regarding current
measurement refer to [1].
5.1.1
Default Power Supply Option Configuration
Power selection between DA145xx DEVKT-P PRO-MB VLDO/ Coin Cell battery and USB Power
Supply is done in two ways:
●
Using resistors R41, R42:
○
R41 - Power supply from DA145xx DEVKT-P PRO-MB / Coin Cell.
Default configuration
.
○
R42 - VLDO (3.3V) of USB power section.
Optional.
●
Using SW4 power switch
. Optional
.
Figure 6: Power option selection for
DA14531 SMARTBOND TINY™ MODULE DB
Figure 7: Power option default configuration
