MMPF0200 datasheet(81/114 Pages) NXP

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NXP Semiconductors

PF0200

FUNCTIONAL BLOCK REQUIREMENTS AND BEHAVIORS

Coin cell charger control

The coin cell charger circuit will function 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 on Table 97. 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 will be stopped when VIN

is below UVDET.

External components

Coin cell specifications

Table 96. Coin cell charger voltage

VCOIN[2:0]

VCOIN (V)(73)

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

73.

Coin cell voltages selected based on the type of LICELL used on the system.

Table 97. Register COINCTL - ADDR 0x1A

Name

Bit #

R/W

Default

Description

VCOIN

2:0

R/W

0x00

Coin cell charger output voltage selection.

See Table 96 for all options selectable through

these bits.

COINCHEN

R/W

0x00

Enable or disable the Coin cell charger

UNUSED

7:4

–

0x00

UNUSED

Table 98. Coin cell charger external components

Component

Value

Units

LICELL Bypass Capacitor

100

Table 99. 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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