PCA9420 datasheet(41/87 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

Bit

Symbol

Default value Type

Function

RSVD

R/W

Reserved bit

VBAT_RESTART 0

R/W

Program a threshold for recharge

0: 140 mV below a programmed VBAT_REG

1: 240 mV below a programmed VBAT_REG

Note: The default value should be 1-bit MTP programmable.

VBAT_REG

[5:0]

011110

R/W

Program a battery regulation voltage, VBAT_REG

Note: The current default value for VBAT_REG [5:0] is set at

4.20 V, but it should be MTP programmable.

Table 32. CHG_CNTL5 register bit description

00h: 3.60 V

10h: 3.92 V

20h: 4.24 V

30h: 4.56 V

01h: 3.62 V

11h: 3.94 V

21h: 4.26 V

31h: 4.58 V

02h: 3.64 V

12h: 3.96 V

22h: 4.28 V

32h: 4.60 V

03h: 3.66 V

13h: 3.98 V

23h: 4.30 V

33 to 3Fh: 4.60 V

04h: 3.68 V

14h: 4.00 V

24h: 4.32 V

05h: 3.70 V

15h: 4.02 V

25h: 4.34 V

06h: 3.72 V

16h: 4.04 V

26h: 4.36 V

07h: 3.74 V

17h: 4.06 V

27h: 4.38 V

08h: 3.76 V

18h: 4.08 V

28h: 4.40 V

09h: 3.78 V

19h: 4.10 V

29h: 4.42 V

0Ah: 3.80 V

1Ah: 4.12 V

2Ah: 4.44 V

0Bh: 3.82 V

1Bh: 4.14 V

2Bh: 4.46 V

0Ch: 3.84 V

1Ch: 4.16 V

2Ch: 4.48 V

0Dh: 3.86 V

1Dh: 4.18 V

2Dh: 4.50 V

0Eh: 3.88 V

1Eh: 4.20 V

(default)

2Eh: 4.52 V

0Fh: 3.90 V

1Fh: 4.22 V

2Fh: 4.54 V

Table 33. VBATREG, linear battery charger regulated battery voltage setting

9.5.20 Battery charger control_6 (CHG_CTL6, address 16h)

This register stores the present status of chip, part 7, linear battery charger related

status. This is a READ AND WRITE register, and this register is locked by CHG_LOCK.

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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