PCA9420BS datasheet(44/85 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

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.

Bit

Symbol

Default value Type

Function

VOUTSW1 _OK 0

SW1 VOUT “Power-good” Status

0: VOUT_SW1 is not OK, i.e., VOUTSW1 / VOUTSW1(nominal) ≤

90 % or VOUTSW1 / VOUTSW1(nominal) ≥ 110 %

1: VOUT_SW1 is OK, i.e., 110 % > VOUTSW1 / VOUTSW1(nominal) >

90 %

VOUTSW2 _OK 0

SW2 VOUT “Power-good” Status

0: VOUT_SW2 is not OK, i.e., VOUTSW2 / VOUTSW2(nominal) ≤

90 % or VOUTSW2 / VOUTSW2(nominal) ≥ 110 %

1: VOUT_SW2 is OK, i.e., 110 % > VOUTSW2 / VOUTSW2(nominal) >

90 %

VOUTLDO1 _OK 0

LDO1VOUT “Power-good” Status

0: VOUTLDO1 is not OK, i.e., VOUTLDO1 / VOUTLDO1 (nominal) ≤

90 % or VOUT LDO1 / VOUT LDO1 (nominal) ≥ 110 %

1: VOUTLDO1 is OK, i.e., 110 % > VOUTLDO1 / VOUTLDO1

(nominal) > 90 %

VOUTLDO2_OK 0

LDO2VOUT “Power-good” Status

0: VOUTLDO2 is not OK, i.e., VOUTLDO2 / VOUTLDO2 (nominal) ≤

90 % or VOUTLDO2 / VOUTLDO2 (nominal) ≥ 110 %

1: VOUTLDO2 is OK, i.e., 110 % > VOUTLDO2 / VOUTLDO2

(nominal) > 90 %

RSVD

Reserved bit

Table 42. REG_STATUS register bit description

PCA9420

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

Product data sheet

Rev. 4.2 — 26 July 2023

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