RFM66W Datasheet, PDF (26/87 Pages) List of Unclassifed Manufacturers – 868 & 915MHz Ultra Low Power High Link Budget Integrated UHF Transceiver

WIRELESS & SENSING
RFM66W
DATASHEET
3.4.8. Over Current Protection
An over current protection block is built-in the chip. It helps preventing surge currents required when the transmitter is used
at its highest power levels, thus protecting the battery that may power the application. The current clamping value is
controlled by OcpTrim bits in RegOcp, and is calculated with the following formulas:
Table 14 Trimming of the OCP Current
OcpTrim
0 to 15
16 to 27
27+
I_MAX
45 to 120 mA
130 to 240 mA
240 mA
Imax Formula
45 + 5*OcpTrim [mA]
-30 + 10*OcpTrim [mA]
240 mA
Note Imax sets a limit on the current drain of the Power Amplifier only, hence the maximum current drain of the
RFM66W is equal to Imax + I_FS
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