KIT34673EPEVBE Freescale Semiconductor, KIT34673EPEVBE Datasheet - Page 12

• Manufacturer Part Number: KIT34673EPEVBE
• Description: KIT EVALUATION FOR MC34673
• Manufacturer: Freescale Semiconductor
• Type: Battery Managementr

Specifications of KIT34673EPEVBE

• Main Purpose: Power Management, Battery Charger
• Embedded: No
• Utilized Ic / Part: MC34673
• Primary Attributes: 1 Cell- Li-Ion
• Secondary Attributes: LED Status Indicators
• Input Voltage: 2.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Product: Power Management Modules
• Supply Current: 1.2 A
• Silicon Manufacturer: Freescale
• Silicon Core Number: MC34673
• Kit Application Type: Power Management - Battery
• Application Sub Type: Battery Charger
• Kit Contents: Evaluation Board, CD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: MC34673

INTEGRATED SUPPLY
INTERNAL SUPPLY AND REFERENCE
voltage to power all the internal blocks. In addition, this block
generates the reference voltage for the charge-control block.
SENSING AND CONTROL
V
for two thresholds, power-on-reset (POR) and over-voltage
protection (OVP). If the input is lower than the POR or higher
than the OVP threshold, this block outputs a logic signal to
disable the charger.
CHARGE CONTROL
power MOSFET to regulate the charge current, the battery
voltage, or the die temperature. It can also completely turn off
the power MOSFET to stop the current flow between the
input and the battery. Also, monitoring of the charge current
and the charger output voltage determines the trickle-charge
mode and the recharge cycle.
12
34673
FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
IN
This block steps down the high input voltage to a lower
The input voltage monitor block monitors the input voltage
The charge-control block controls the gate voltage of the
MONITOR
MC34673 - Functional Block Diagram
Integrated Supply
Current Monitor
Current Setting
V IN Monitor
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
Sensing & Control
Integrated Supply
Figure 20. 34673 Functional Internal Block Diagram
Die Temperature Feedback
Status Indication
Logic Control
Logic
Sensing & Control
VIN - BAT Compare
Charge Control
End of Charge
CURRENT SETTING AND MONITOR
current mode and monitors the actual charge current during
the whole charge cycle.
EOC (END OF CHARGE)
battery voltage for the EOC conditions. Once the EOC
conditions are reached, this block outputs a logic signal to
indicate the end of the charge.
VIN-BAT COMPARATOR
between the input voltage and the battery voltage. The input
voltage has to be higher than the battery voltage for the
charger to be enabled. If the input voltage falls below the
battery voltage, this block outputs a signal to disable the
charger to prevent the leakage current from the battery to the
input.
DIE TEMPERATURE FEEDBACK
temperature. Once the die temperature reaches the
threshold temperature, the charge-control block can reduce
the charge current to prevent further die temperature rise.
This block programs the charge current in the constant-
The EOC block monitors the charge current and the
The VIN-BAT comparator monitors the voltage difference
The die temperature feedback block monitors the die
Logic
Power MOSFET
Analog Integrated Circuit Device Data
MOSFET
Freescale Semiconductor