MMPF0100Z datasheet(94/128 Pages) NXP

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NXP Semiconductors

PF0100Z

FUNCTIONAL BLOCK REQUIREMENTS AND BEHAVIORS

6.4.7.1.1

Coin cell charger control

The coin cell charger circuit functions as a current-limited voltage source, resulting in the CC/CV taper characteristic typically used for

rechargeable Lithium-Ion batteries. The coin cell charger is enabled via the COINCHEN bit, while the coin cell voltage is programmable

through the VCOIN[2:0] bits on register COINCTL in Table 112. The coin cell charger voltage is programmable. In the on state, the charger

current is fixed at ICOINHI. In sleep and standby modes, the charger current is reduced to a typical 10

μA. In the off state, coin cell charging

is not available as the main battery could be depleted unnecessarily. The coin cell charging is stopped when VIN is below UVDET.

6.4.7.1.2

External components

6.4.7.1.3

Coin cell specifications

Table 111. Coin cell charger voltage

VCOIN[2:0]

VCOIN (V)(78)

000

2.50

001

2.70

010

2.80

011

2.90

100

3.00

101

3.10

110

3.20

111

3.30

Notes

78.

Coin cell voltages selected based on the

type of LICELL used on the system.

Table 112. Register COINCTL - ADDR 0x1A

Name

Bit #

R/W

Default

Description

VCOIN

2:0

R/W

0x00

Coin cell charger output voltage selection.

See Table 111 for all options selectable through

these bits.

COINCHEN

R/W

0x00

Enable or disable the coin cell charger

UNUSED

7:4

–

0x00

unused

Table 113. Coin cell charger external components

Component

Value

Units

LICELL bypass capacitor

100

Table 114. Coin cell charger specifications

Parameter

Typ

Unit

Voltage accuracy

100

Coin cell charge current in on mode ICOINHI

μA

Current accuracy

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