MC13883_10 datasheet(8/64 Pages) FREESCALE

Teilenummer	MC13883

Bauteilbeschribung	Integrated Charger USB Interface

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Hersteller	FREESCALE [Freescale Semiconductor, Inc]

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Power Architecture

MC13883 Technical Data, Rev. 3

8

Freescale Semiconductor

Figure 2. Power Architecture Block Diagram

4.2

Charging

This section details the charging functionality. Charge current comes into VBUS from a USB source or

charger and is routed to the battery. Power is also routed to the phone circuitry. This can be accomplished

in different manners as described below.

If it is desired that the phone circuitry be guaranteed to be powered during charge, the “dual path”

technique is probably desirable, as power separately reaches the battery and the phone so that the phone

functions even though the battery may be very deeply discharged.

Component count can be reduced with a single-path charge architecture, but at the cost of reduced or

delayed functionality when charging a battery that is severely discharged.

Dual Path, Single Path and Serial Path charging is described below and shown in Figures 3, 4 and 5.

MC13883 IC Power Block Diagram

(dual path configuration)

VUSB

LDO

5V LDO/

Switch

VBus Pulsing

Timer

Mini-B or

Mini-AB

Receptacle

ID

GND

Battery

Battery FET

Back-to-Back

FET's

Charge Control,

Voltage

Regulator and

Switching Logic

D+

D-

VBus

Overvoltage

Detect

D+ / D-

and ID

Detection

BP FET

VBUS

REG_5V_IN

ID

DM

DP

VUSB

Seamless/

FET

Switching

Logic

BP Voltage

Regulator /

Switching

Logic

ISENSE

CHRGCTRL

BATT_FET

BP_FET

BATTP

BP

CHRGMODE

To A/D

Convertor Input

ICHRG

To Phone

Load

Rs

PWR_ON

Turnon signal

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