AS3955 datasheet(18/102 Pages) AMSCO

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[v1-04] 2016-Feb-03

AS3955 − Detailed Description

Energy Harvesting

AS3955 has energy harvesting capability. The regulated voltage

output pin for energy harvesting is VP_REG. The energy

harvesting is enabled only in Power Mode 0 and 1. Figure 16

shows settings of the regulated voltage output. The output can

be set between 1.8V and 4.5V in 100mV step. The output voltage

and resistance can be set by Configuration Byte IC_CFG1.The

energy harvesting can be disabled by setting the output

resistance register to 0 as shown in Figure 15.

Figure 15:

Output Resistance Settings

Figure 15 shows settings of the regulated voltage output. The

output can be set between 1.8V and 4.5V in 100mV step.

Figure 16:

Regulated Voltage Output Settings

rreg<1:0>

Output Resistance

Comment

00b

Disabled – output pin

is in tristate

01b

100Ω

10b

50Ω

11b

25Ω

vreg<4:0>

Output Voltage

Abs. Accuracy

00000b

1.8V

±115mV

00001b

Step 100mV

±20mV

Linearly increasing

over range

11011b

4.5V

±225mV

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