PCA9420 datasheet(43/87 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

000: 80 °C

010: 90 °C

100: 100 °C

110: 110 °C

001: 85 °C

011: 95 °C

101: 105 °C

111: 115 °C

Table 37. Thermal regulation threshold setting

9.5.22 Battery charger status_0 (CHG_STATUS_0, address 18h)

This register stores the present status of the linear battery charger, part 0. 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

VBAT_DET_OK

VBAT Detection Status

0: No valid battery attachment detected

1: Battery attachment detected

VBAT_OK

(Only valid with VBAT_DET_OK = 1)

VBAT status, refer to BAT_DETAIL_STATUS [2:0] for more details

0: the battery is invalid/missing, or charger reset is active, i.e.

BAT_DETAIL_STATUS [2:0] = 0b000, 0b111

1: the battery is OK. i.e. BAT_DETAIL_STATUS [2:0] = 0b001, 0b010,

0b011, 0b100, 0b101

IN_PWR_OK

IN_PWR (input power) status, refer to IN_PWR_STATUS [1:0] for more

details

0: Input power voltages are invalid. i.e. IN_PWR_STATUS [1:0] ≠ 0b11

1: Input power voltages are valid. i.e. IN_PWR_STATUS [1:0] = 0b11

CHG_OK

Charger status

0: The charger has suspended due to the following conditions: TS_

DETAIL_STATUS [2:0] = 001’b or 100’b; or SFTY_TIMER_STATUS

[1:0] ≠ 00’b

1: The charger is OK

RSVD

Reserved bit

RSVD

Reserved bit

RSVD

Reserved bit

RSVD

Reserved bit

Table 38. CHG_STATUS_0 register bit description

9.5.23 Battery charger status_1 (CHG_STATUS_1, address 19h)

This register stores the present status of the linear battery charger, part 1. 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. 4.0 — 28 November 2022

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