NL865H2 Hardware Design Guide
1VV0301616 Rev. 7
Page
24
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67
2020-04-20
The reference circuit is as follow:
4.4.1.2.
Battery Source Power Supply Design Guidelines
The desired nominal output for the power supply is 3.3V and the maximum voltage allowed
is 3.63V.
•
A Bypass low ESR capacitor of adequate capacity must be provided in order to cut
the current absorption peaks, a 100μF tantalum capacitor is usually suited.
•
Make sure the low ESR capacitor (usually a tantalum one) is rated at least 10V.
•
A protection diode should be inserted close to the power input, in order to save the
NL865H2-W1 from power polarity inversion. Otherwise the battery connector should
be done in a way to avoid polarity inversions when connecting the battery.
WARNING:
The three cells Ni/Cd or Ni/MH 3.6 V Nom. Battery types or 4V PB types
MUST NOT BE USED DIRECTLY since their maximum voltage can rise
over the absolute maximum voltage for the NL865H2-W1 and damage it.
NOTE:
DON’T USE any Ni-Cd, Ni-MH, and Pb battery types directly connected with
NL865H2-W1. Their use can lead to overvoltage on the NL865H2-W1 and
damage it. USE ONLY Li-Ion battery types.
