CS1631 datasheet(45/56 Pages) APEX

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CS1630/31

DS954F2

6.35 Configuration 53 (Config53) – Address 85

654

BOP_INTEG2 BOP_INTEG1 BOP_INTEG0 BOP_THRES3 BOP_THRES2 BOP_THRES1 BOP_THRES0 BOOST_ON

Number

Name

Description

[7:5]

BOP_INTEG[2:0]

Sets the leaky integrator output threshold for declaring a boost output protec-

tion (BOP) fault. The BOP fault signal is averaged continuously using a leaky

integrator and if the averaged value exceeds the leaky integrator output

threshold a BOP fault is declared. When VBST exceeds the set threshold

BOP_THRES[3:0], the leaky integrator uses these parameters: feedback

coefficient = 63/64; sample rate = 12.5kHz; input = 8.

000 = BOP fault trips immediately when VBST crosses threshold (no filter)

001 = 1

010 = 2

011 = 3

100 = 4

101 = 5

110 = 6

111 = 7

[4:1]

BOP_THRES[3:0]

Configures threshold VBOP(th) for the BOP to be 0 to 30V above the clamp

turn-on voltage setting which is 227V for 120V IC (CS1630) and 432V for

230V IC (CS1631). The threshold value can be set from 0 to 30V in incre-

ments of 2V above the clamp turn-on voltage setting. For a 120V IC:

For a 230V IC:

This value is limited internally to 254V for 120V IC and 508V for 230V IC.

The boost overvoltage protection does not trip immediately when the boost

output voltage crosses this threshold, unless BOP_INTEG[2:0] = 0.

[0]

BOOST_ON

Selects when to enable boost stage on chip power-up.

0 = Boost after eOTP measurement check for TempNTC>TempWakeup

1 = Boost after ADC lock without waiting for eOTP measurement to finish

VBOP th



BOP_THRES



[3:0] 2

 227V



VBOP th



BOP_THRES



[3:0] 2

 432V



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