PCA9420 datasheet(39/87 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

Bit

Symbol

Default value Type

Function

5:0

ICHG_LOW [5:0] 001000

R/W

Program a pre-charge (Low battery charge current)

Note: Current value set in ICHG_LOW [5:0] should NOT be higher

than the value set in ICHG_CC [5:0].

Note: The current default value for ICHG_LOW [5:0] is set at 8 mA,

ICHG_LOW [4:3] should be MTP programmable. For MTP options,

ICHG_LOW can only selected from 0 mA, 8 mA, 16 mA, 24 mA

Table 27. CHG_CNTL3 register bit description...continued

00h: 0 mA

10h: 16 mA

20h: 32 mA

30h: 48 mA

01h: 1 mA

11h: 17 mA

21h: 33 mA

31h: 49 mA

02h: 2 mA

12h: 18 mA

22h: 34 mA

32h: 50 mA

03h: 3 mA

13h: 19 mA

23h: 35 mA

33h: 51 mA

04h: 4 mA

14h: 20 mA

24h: 36 mA

34h: 52 mA

05h: 5 mA

15h: 21 mA

25h: 37 mA

35h: 53 mA

06h: 6 mA

16h: 22 mA

26h: 38 mA

36h: 54 mA

07h: 7 mA

17h: 23 mA

27h: 39 mA

37h: 55 mA

08h: 8 mA

(default)

18h: 24 mA

28h: 40 mA

38h: 56 mA

09h: 9 mA

19h: 25 mA

29h: 41 mA

39h: 57 mA

0Ah: 10 mA

1Ah: 26 mA

2Ah: 42 mA

3Ah: 58 mA

0Bh: 11 mA

1Bh: 27 mA

2Bh: 43 mA

3Bh: 59 mA

0Ch: 12 mA

1Ch: 28 mA

2Ch: 44 mA

3Ch: 60 mA

0Dh: 13 mA

1Dh: 29 mA

2Dh: 45 mA

3Dh: 61 mA

0Eh: 14 mA

1Eh: 30 mA

2Eh: 46 mA

3Eh: 62 mA

0Fh: 15 mA

1Fh: 31 mA

2Fh: 47 mA

3Fh: 63 mA

Table 28. Low battery charge current setting

9.5.18 Battery charger control_4 (CHG_CTL4, address 14h)

This register stores the present status of chip, part 4, linear battery charger related

status. This is a READ AND WRITE register,

and this register is locked by

CHG_LOCK.

Bit

Symbol

Default value Type

Function

7:6

ICHG_DEAD_

TIMER [7:6]

R/W

Program a Dead charge timer

Note: The current default value for ICHG_DEAD_TIMER [7:6] is set at

5 sec.

For more details, see Figure 10

Table 29. CHG_CNTL4 register bit description

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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