AS3517 datasheet(82/94 Pages) AMSCO

82 / 94 page

AS3517 V17

Data Sheet, Confidential

www.austriamicrosystems.com

Table 84 Supervisor Register

Name

Base

Default

SUPERVISOR

2-wire serial

00h

Supervisor Register

Offset: 21h

Sets the threshold levels of battery supply and junction temperature supervision.

This register is reset at a DVDD-POR.

Bit

Bit Name

Default

Access

Bit Description

7:5

BVDD_SUP

000

R/W

Sets the threshold (brown-out voltage) at the BVDD input pin

for an interrupt at low battery condition

V_BrownOut=2.74+BVDD_Sup*60mV

000: 2.74V

001: 2.80V

…

110: 3.10V

111: 3.16V

4:0

JTEMP_SUP

00000

R/W

Sets the threshold for junction temperature emergency

shutdown and junction temperature interrupt

Invoke shutdown at: JTemp_SD=140-JTEMP_Sup*5

°C

Invoke interrupt at: JTemp_IRQ=120-JTEMP_Sup*5

°C

Table 85 Charger Register

Name

Base

Default

CHARGER

2-wire serial

00h

Charger Control Register

Offset: 22h

Sets the charging current, end of charge voltage and battery temp. supervision.

This register is reset at a DVDD-POR.

Bit

Bit Name

Default

Access

Bit Description

BAT_TEMP_OFF

R/W

0: enables 15uA supply for external 100k NTC resistor

1: disables supply

6:4

CHG_I

000

R/W

set maximum charging current

111: 400 mA

110: 350 mA

101: 300 mA

100: 250 mA

011: 200 mA

010: 150 mA

001: 100 mA

000: 50 mA

3:1

CHG_V

000

R/W

set maximum charger voltage in 50mV steps

111: 4.25 V

110: 4.2 V

001: 3.95 V

000: 3.9 V

CHG_OFF

R/W

0: enables Charger

1: disables Charger

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