Microchip Technology MCP1631RD-MCC2 Data Sheet

© 2008 Microchip Technology Inc.

DS22063B-page 1

• Programmable Switching Battery Charger 

Designs

• High-Speed Analog PWM Controller

(2 MHz Operation)

• Combine with Microcontroller for “Intelligent” 

Power System Development

• Peak Current Mode Control (MCP1631)
• Voltage Mode Control (MCP1631V)
• High Voltage Options Operate to +16V Input:

- MCP1631HV Current Mode
- MCP1631VHV Voltage Mode

• Regulated Output Voltage Options:

-    +5.0V or +3.3V
-    250 mA maximum current

• External Oscillator Input sets Switching 

Frequency and Maximum Duty Cycle Limit

• External Reference Input Sets Regulation Voltage 

or Current

• Error Amplifier, Battery Current I

SNS

 Amplifier, 

Battery Voltage V

SNS

 Amplifier Integrated

• Integrated Overvoltage Comparator
• Integrated High Current Low Side MOSFET 

Driver (1A Peak)

• Shutdown mode reduces IQ to 2.4 µA (typical)
• Internal Overtemperature Protection
• Undervoltage Lockout (UVLO)
• Package Options:

- 4 mm x 4 mm 20-Lead QFN

(MCP1631/MCP1631V only)

- 20-Lead TSSOP (All Devices)
- 20-Lead SSOP (All Devices)

• High Input Voltage Programmable Switching 

Battery Chargers

• Supports Multiple Chemistries Li-Ion, NiMH, NiCd 

Intelligent and Pb-Acid 

• LED Lighting Applications
• Constant Current SEPIC Power Train Design
• USB Input Programmable Switching Battery 

Chargers

The MCP1631/MCP1631V is a high-speed
analog pulse width modulator (PWM) used to develop
intelligent power systems. When combined with a
microcontroller, the MCP1631/MCP1631V will control
the power system duty cycle providing output voltage
or current regulation. The microcontroller can be used
to adjust output voltage or current, switching frequency
and maximum duty cycle while providing additional
features making the power system more intelligent,
robust and adaptable.
Typical applications for the MCP1631/MCP1631V
include programmable switch mode battery chargers
capable of charging multiple chemistries, like Li-Ion,
NiMH, NiCd and Pb-Acid configured as single or
m u l t i p l e   c e l l s .   B y   c o m b i n i n g   w i t h   a   s m a l l
microcontroller, intelligent LED lighting designs and
programmable SEPIC topology voltage and current
sources can also be developed.
The MCP1631/MCP1631V inputs were developed to
be attached to the I/O pins of a microcontroller for
design flexibility. Additional features integrated into the
MCP1631HV/MCP1631VHV provide signal condition-
ing and protection features for battery charger or
constant current source applications.
For applications that operate from a high voltage input,
the MCP1631HV and MCP1631VHV device options
can be used to operate directly from a +3.5V to +16V
input. For these applications, an additional low drop out
+5V or +3.3V regulated output is available and can
provide current up to 250 mA to power a microcontroller
and auxiliary circuits.