PCA9420 datasheet(45/87 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

Bit

Symbol

Default value Type

Function

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...continued

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.

Bit

Symbol

Default value Type

Function

TS_STATUS

0: TS_DETAIL_STATUS [2:0] = 000. Battery temp is normal, no impact

on normal charging.

1: TS_DETAIL_STATUS [2:0] ≠ 000.

TS_DETAIL_

STATUS

[2:0]

000

000: Battery Temperature Nominal, T2 ≤ T ≤ T3

001: Battery Temperature is Cold, T < T1

010: Battery Temperature is Cool, T1 ≤ T < T2

011: Battery Temperature is Warm, T3 < T ≤ T4

100: Battery Temperature is Hot, T > T4

RSVD

Reserved bit

CHIP_TEMP_

STATUS

Chip Temp Status:

0: Thermal regulation not activated

1: Thermal regulation activated

SFTY_TIMER_S

TATUS

[1:0]

00: Safety Timers having No Effect on Battery Charging

01: Pre-qual Timer expires, battery charging suspended

10: Fast Timer expires, battery Charging suspended

11: Battery short test fails, battery charging suspended

Table 41. CHG_STATUS_3 register bit description

1Ch to 1Fh registers: Reserved

9.5.26 Regulator status (REG_STATUS, address 20h)

This register stores the present status of the SW1, SW2, LDO1, LDO2. This is a READ

ONLY register.

PCA9420

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 4.0 — 28 November 2022

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