HPM10_16 Datasheet, PDF (7/18 Pages) ON Semiconductor – Power Management IC for Hearing Aids

HPM10
External Components
HPM10 requires six external components listed in Table 4. Depending which type of rechargeable battery is used, some of
the decoupling caps are not needed.
Table 4. EXTERNAL COMPONENTS
Component
Function
Cp1
Capacitor 1 for charge pump
Cp2
Capacitor 2 for charge pump
Cha
Cvbat
Creg
button
VHA decoupling capacitor
Battery decoupling cap
Voltage and current ref decoupling cap
Button to interact with the system
Typ. Value
2.2
2.2
0.1
1
6.8
−
Tol.
20%
20%
20%
20%
20%
Units
mF
mF
mF
mF
mF
−
Notes
Required for Lithium−Ion
For other batteries, CP1A and
CP1B pins can be floating
Required for Lithium−Ion
For other batteries, CP2A and
CP2B pins can be floating
Cvbat should always be 5*Cha to
ensure reliable startup
Intermittent
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