Information
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Portable Power Conversion Design Guide
Battery Management
Programmable Battery Chargers
MCP19111 Switching Battery Charger Circuit
Designs for wide input range, high output power multi-chemistry battery chargers are used for many battery-powered
applications. The MCP19111 programmable battery charger reference design operates from an input range of 6V to 28V
and can be configured to charge NiMH, Li-Ion and LiFeO4 batteries in multiple series and parallel configurations. The
reference design uses the MCP19111 Digitally Enhanced Power Analog PWM controller to step down higher input voltages
to lower output voltage while regulating the current or voltage to properly charge the selected battery chemistry. A graphical
user interface (GUI) is configured prior to starting the charge profile for the desired battery load. Once configured, the
MCP19111 flash memory stores the charge settings for subsequent charge cycles.
Simplified MCP19111 Programmable Multi-Chemistry Battery Charger
MCP19111 Features
■ Single channel
■ Vin Range: 4.5V to 32.0V
■ Integrated, synchronous MOSFET driver:
• Logic-level drive (5V)
• 2A source/4A sink drive current
■ Fully programmable (12F core)
• MPLAB® X IDE support, GUI-configurable
• 4 k word Flash, 256b RAM
• Internal, adjustable analog compensation
• Adjustable deadtime/current limit/UVLO/OVLO/…
• Configurable switching frequency: 100 kHz to 1.2 MHz
• Up to 12 general purpose I/O
• PMBus/I
2
C™ communication interface
■ Master/slave synch frequency
■ Available in 28-lead 5 × 5 mm QFN
GPIO
GPIO
GND
V
DD
VDR
VIN
ICSP
PICkit™ Serial
VSENSE
HDRV
BOOT
PHASE
+I
SENSE
–ISENSE
I
BATT
-
SENSE
LDSRV
+VIN
GND
J
2
J
3
A = 40
½ MCP6072
½ MCP6072
A = 1
+VDD
+VBATT
–VBATT
Temp_Sens
e