AS3658F-BCTP datasheet(65/158 Pages) AMSCO

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AS3658

Data Sheet Confidential - Detail ed Descri ption-Power Management Functions

Figure 21. Charger Supervision functions – internal circuit

Table 58. NTC Chargersupervision Characteristics, VVBAT=3.0…5.5V; Tamb=–20…+85°C; unless otherwise

specified.

Symbol

Parameter

Min

Typ

Max

Unit

Note

tsample

Sample time for NTC

measurement high or

low temperature

Alternating measurement of the NTC

sensor for high temperature and low

temperature with two different

currents

Vcomp

Comparator threshold

for high and low

temperature

measurement

1.8

On pin ADC_IN1, if ntc_on<1:0>=1

IHightemp45deg_1

High temperature

current for 45 deg limit,

10k NTC

-7%

388

+7%

µA

ntc_type=0, ntc_high_temp=0,

@ 1.8V threshold

4.64

IHightemp50deg_1

High temperature

current for 50 deg limit,

10k NTC

-7%

457

+7%

µA

ntc_type=0, ntc_high_temp=1,

@ 1.8V threshold

3.94

IHightemp0deg_10k

High temperature

current for 0 deg limit,

10k NTC

60.5

µA

ntc_type=0

@ 1.8V threshold

29.7

IHightemp45deg_1

00k

High temperature

current for 45 deg limit,

100k NTC

39.2

µA

ntc_type=1, ntc_high_temp=0,

@ 1.8V threshold

4.59

ILowtemp50deg_10

Low temperature

current for 50 deg limit,

100k NTC

46.8

µA

ntc_type=1, ntc_high_temp=1,

@ 1.8V threshold

38.5

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