PCA9420BS datasheet(43/85 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

Bit

Symbol

Default value Type

Function

RSVD

Reserved bit

TREG_STATUS

Temperature Regulation Loop Status

0: Die junction temperature is less than the threshold set by

THM_REG and the full charge current limit is available.

1: Die junction temperature is greater than the threshold set by THM_

REG, and the charge current limit may be folding back to reduce

power dissipation.

RSVD

Reserved bit

RSVD

Reserved bit

RSVD

Reserved bit

RSVD

Reserved bit

Table 39. CHG_STATUS_1 register bit description...continued

9.5.24 Battery charger status_2 (CHG_STATUS_2, address 1Ah)

This register stores the present status of the linear battery charger, part 2.

This is a READ ONLY register. The status of this register is only valid when IN_PWR_OK = 1. The status of this

Bit

Symbol

Default value Type

Function

RSVD

Reserved bit

BAT_DETAIL_

STATUS

[2:0]

111

Battery conditions in details

000: Battery missing, not attached

001: Battery detection in-progress

010: VBAT < VBAT_DEAD

011: VBAT_DEAD < VBAT < VBAT_LOW

100: VBAT_LOW < VBAT < (VBAT_REG – VBAT_RESTART)

101: VBAT > (VBAT_REG – VBAT_RESTART)

110: reserved

111: battery charger is in reset

RSVD

Reserved bit

BAT_CHG_

STATUS

[2:0]

000

Charge conditions in details:

000: Charger in Idle State

001: Charger in Dead-Battery State

010: Charger in Low-Battery State

011-100: Charger in Fast Charging state in either CC or CV

101: Charger in Top-off State

110: Charger in Done State

111: Reserved

Table 40. CHG_STATUS_2 register bit description

9.5.25 Battery charger status_3 (CHG_STATUS_3, address 1Bh)

This register stores the present status of the linear battery charger, part 3. This is a READ ONLY register. The

status of this register is only valid when VIN_ILIM condition is not reached.

PCA9420

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Product data sheet

Rev. 4.2 — 26 July 2023

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