AS3701 datasheet(30/110 Pages) AMSOSRAM

30 / 110 page

ams Datasheet

Page 29

[v1-11] 2016-Dec-14

Document Feedback

AS3701 − Detailed Description – Power Management Functions

NTC ß-Correction

To keep the voltage drop over the whole temperature range

inside of the comparator threshold voltage range, a 15k (150k)

parallel resistor to the 10k (100k) NTC is needed. With the bit

ntc_beta [ChargerSupervision] 4 different

ß-values depending

on the used NTC resistor can be selected.

Figure 34:

NTC

ß Influence Over Temperature

NTC ß Influence Diagram: Shows the voltage drop over the NTC resistor depending on the temperature for 4

different ß values using RNTC=10kΩ, Rp=15kΩ and INTC=150μA.

Figure 35:

NTC Threshold Voltages

NTC Supervision: Comparator threshold voltages for different temperatures and ß using RNTC=10kΩ, Rp=15kΩ

and INTC=150μA.

Temperature

Unit

3000

3500

4000

4500

Low temperature

0°C

1.41

1.49

1.56

1.63

High temperature

45°C

0.59

0.54

0.50

0.46

60°C

0.42

0.37

0.31

0.27

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

10203040

NTC_Temperature (°C)

ß = 3000

ß = 3500

ß = 4000

ß = 4500

AS3701 Scheda tecnica(PDF) 30 Page - ams-OSRAM AG

AS3701 Scheda tecnica(HTML) 30 Page - ams-OSRAM AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL