KIT34673EPEVBE Freescale Semiconductor, KIT34673EPEVBE Datasheet - Page 17

• 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

INPUT CAPACITOR
transient that may cause instability. A 1.0µF, X5R, 16V rated
ceramic capacitor is recommended for most applications.
OUTPUT CAPACITOR
minimum 2.2µF nominal value is recommended at the output.
Depending on the load transient current, larger capacitance
may be required.
CC-MODE CURRENT SETTING
resistor, R
guarantee 6% current accuracy.
STAND-ALONE CHARGER
without MCUs.
Analog Integrated Circuit Device Data
Freescale Semiconductor
The input capacitor is used to reduce the input voltage
For stable operation, an X5R ceramic capacitor with a
The CC-mode current can be programmed by the external
The MC34673 can be used in a standalone charger
ISET
. A 1% accuracy resistor is recommended to
Input
Figure 23
shows such an application. The
GREEN
470
470
RED
Figure 23. Stand Alone Li+ Battery Charger
TYPICAL APPLICATIONS
1µF
INTRODUCTION
APPLICATIONS
VIN
GND
CHG
PPR
EN
MC34673
DROPOUT VOLTAGE
programmed CC-mode charge current due to the voltage
dropout over the power MOSFET. The worst case of the
R
higher than V
programmed CC-mode current.
THERMAL CONSIDERATIONS
enhanced UDFN package. A careful thermal design must be
considered. The exposed pad needs to be well soldered to a
large copper ground plane on the component layer. If the
component layer is space limited and does not allow for a
large copper plane, the thermal pad must be connected to
other ground layers through a via array. This allows
MC34673 to charge the battery with the maximum current,
while minimizing the die temperature.
green LED indicates the power presence and the red LED
indicates the charge status. In total, only 7 external
components are required.
DS(ON)
If the DC input voltage is too low, it may not maintain the
The MC34673 is available in a tiny 2x3 thermally-
is 475mΩ. The input voltage should be at least
FAST
ISET
BAT
BAT
+ I
5.23k
CHG
x 475mΩ to guarantee the
2.2µF
TYPICAL APPLICATIONS
Li+
INTRODUCTION
34673
17