34675 datasheet(14/24 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

34675

FUNCTIONAL DESCRIPTION

FUNCTIONAL INTERNAL BLOCK DESCRIPTION

Die-Temperature feedback

The die temperature feedback block monitors the die

temperature. Once the die temperature reaches the

threshold temperature, this charge control block can reduce

the charge current to prevent further die temperature rise.

LOGIC

Logic Control and Status Indication

The logic control block determines the on and off of the

charger and indicates the charger status. It takes the signals

from the input voltage monitor, VIN-BAT comparator, EOC,

and the external enable signal, and determines the on and off

states as well as the charge status indication outputs of the

charger (CHG and PPR).

OUTPUTS

Power MOSFET

The power MOSFET passes the charging current from the

input to the output.

Linear Regulator

The linear regulator outputs a regulated 4.85V from the

input voltage with 10mA current capability. If the Input

Voltage Monitor detects that the input voltage is lower than

the POR or higher than the OVP threshold, the linear

regulator is disabled. No other signal can control the linear

regulator.

34675 Datasheet(PDF) 14 Page - Freescale Semiconductor, Inc