BM63 datasheet(19/56 Pages) MICROCHIP

19 / 56 page

 2016 Microchip Technology Inc.

Advance Information

DS60001431A-Page 19

BM63

4.0

POWER MANAGEMENT UNIT

The on-chip Power Management Unit (PMU) has two

main features: lithium-ion and lithium-polymer battery

charger, and voltage regulation. A power switch is used

to switch over the power source between the battery

and adapter. Also, the PMU provides current to drive

three LEDs.

4.1

Charging a Battery

The BM63 module has a built-in battery charger which

is optimized for lithium-ion and lithium-polymer batter-

ies.The charger includes a current sensor for charging

control, user programmable current regulation and

high-accuracy voltage regulation.

The charging current parameters are configured by the

UI tool. Reviving, pre-charging, constant current and

constant voltage modes and re-charging functions are

included. The maximum charging current is 350 mA.

Figure 4-1 illustrates the charging curve of a battery.

FIGURE 4-1:

CHARGING CURVE

4.2

Voltage Monitoring

A 10-bit successive approximation register ADC (SAR

ADC) provides a dedicated channel for battery voltage

level detection. The warning level can be programmed

by using the UI tool. The ADC provides a granular res-

olution to enable the external MCU to take control over

the charging process.

4.3

LED Driver

Three dedicated LED drivers control the LEDs. They

provide enough sink current (16 step control and 0.35

mA for each step), thus LEDs can be connected

directly with the BM63 module.

The LED settings can be configured using the UI tool.

Figure 4-2 illustrates the LED drivers in the BM63

module.

BM63 Datasheet(PDF) 19 Page - Microchip Technology

BM63 Datasheet(HTML) 19 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Datasheet Download

Link URL