PCA9420 datasheet(20/87 Pages) NXP

20 / 87 page

NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

aaa-033082

VBAT

3.6 V to 4.6 V, 20 mV steps, 4.2 V Default

1.9 V (1.7 V, 1.8 V,

2 V by MTP)

VBAT

Trickle Charge

(Dead Battery)

Mode

Fast Charge Mode

Top-OFF

Mode

Charging Done Mode

Current to battery

ICHG_TOPOFF

ICHG = 0 mA

0 mA

Recharge Mode

(Fast Charge Mode)

2.5 V (2.3 V,2.4 V,2.6 V by MTP)

tDGL_BAT_LOW2CC = 50 µs

Pre-charge

(Low-Voltage)

Mode

5 mA to 315 mA programmable in 5 mA steps

tDGL_BAT_CC2TOPOFF = 20 ms

tDGL_BAT_RESTART = 50 ms

ICHG_TOPOFF

Time

di/dt=3 mA/µs

85 mA to 1105 mA programmable

1 mA to 63 mA programmable

in 1 mA steps

1 mA to 63 mA programmable

in 1 mA steps

1 mA to 20 mA programmable

in 1 mA steps

reset

tDGL_BAT_DEAD2LOW = 50 µs

3, 5, 7, or 9 hours

reset

0, 6.4, 12.8, or 19.2 min

TCHG_TOPOFF started

TCHG_TOPOFF expired

TCHG_TOPOFF

15, 30, 45,

or 60 min

reset

OFF

Fast Charge Mode

VBAT_RESTART

(=VBAT_REG - 140 mV

or 240 mVtyp)

VBAT_REG

VBAT_LOW

VBAT_DEAD

ICHG_CC

ICHG_LOW

ICHG_DEAD

TCHG_PREQ

TCHG_FAST

TCHG_TOPOFF

VIN__ILIM

Input & Charge Current

Figure 9. Typical charging profile example

PCA9420

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

Product data sheet

Rev. 4.0 — 28 November 2022

20 / 87

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