RF69 datasheet(22/81 Pages) ETC2

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RF69

Page 22

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Pout on PA0 [dB m ]

Pout on PA1 [dB m ]

Pout on PA1+ PA2 [dBm ]

P out on PA1+ PA2 with 20dB m s ettings [dB m ]

3.3.7. High Power Settings

The RF69 has a high power +20 dBm capability on PA_BOOST pin, with the following settings:

Table 11 High Power Settings

Address

Value for

High Power

Value for Rx

or PA0 use

Description

RegOcp

0x13

0x0F

0x1x

OCP control

RegTestPa1

0x5A

0x5D

0x55

High power PA control

RegTestPa2

0x5C

0x7C

0x70

High power PA control

Note

High Power settings MUST be turned off when using PA0, and in Receive mode

The Duty Cycle of transmission at +20dBm is limited to 1%, with a maximum VSWR of 3:1 at antenna port, over the

standard operating range [-40;+85°

C].

3.3.8. Output Power Summary

The curves below summarize the possible PA options on the RF69:

P out vs. P ro gra m me d Po w e r

-2

-6

-10

-14

-18

-22

-18

-14

-10

-6

-2

Pr o g r am m e d Po w e r [d Bm ]

Figure 6. Output Power Curves

3.3.9. 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 formula:

Imax = 45 + 5 



Note

Imax sets a limit on the current drain of the Power Amplifier only, hence the maximum current drain of the

RF69 is equal to Imax + IFS

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