MCP1631/HV/MCP1631V/VHV
High-Speed, Pulse Width Modulator
Features General Description
Programmable Switching Battery Charger The MCP1631/MCP1631V is a high-speed microcon-
Designs troller based pulse width modulator (PWM) used to
develop intelligent power systems. When combined
High-Speed Analog PWM Controller (2 MHz
with a microcontroller, the MCP1631/MCP1631V will
Operation)
control the power system duty cycle providing output
Combine with Microcontroller for Intelligent
voltage or current regulation. The microcontroller can
Power System Development
be used to adjust output voltage or current, switching
Peak Current Mode Control (MCP1631)
frequency and maximum duty cycle while providing
Voltage Mode Control (MCP1631V)
additional features making the power system more
High Voltage Options Operate to +16V Input:
intelligent, robust and adaptable.
- MCP1631HV Current Mode
Typical applications for the MCP1631/MCP1631V
- MCP1631VHV Voltage Mode
include programmable switch mode battery chargers
capable of charging multiple chemistries, like Li-Ion,
Regulated Output Voltage Options:
NiMH, NiCd and Pb-Acid configured as single or
- +5.0V or +3.3V
multiple cells. By combining with a small microcontrol-
- 250 mA maximum current
ler, intelligent LED lighting designs and programmable
External Oscillator Input sets Switching
SEPIC topology voltage and current sources can also
Frequency and Maximum Duty Cycle Limit
be developed.
External Reference Input Sets Regulation Voltage
The MCP1631/MCP1631V inputs were developed to
or Current
be attached to the I/O pins of a microcontroller for
Amplifier,
Error Amplifier, Battery Current I
SNS
design flexibility. Additional features integrated into the
Battery Voltage V Amplifier Integrated
SNS
MCP1631HV/MCP1631VHV provide signal condition-
Integrated Overvoltage Comparator
ing and protection features for battery charger or
Integrated High Current Low Side MOSFET constant current source applications.
Driver (1A Peak)
For applications that operate from a high voltage input,
Shutdown mode reduces IQ to 2.4 A (typical)
the MCP1631HV and MCP1631VHV device options
Internal Overtemperature Protection can be used to operate directly from a +3.5V to +16V
input. For these applications, an additional low drop out
Undervoltage Lockout (UVLO)
+5V or +3.3V regulated output is available and can
Package Options:
provide current up to 250 mA to power a microcontrol-
- 4 mm x 4 mm 20-Lead QFN
ler and auxiliary circuits.
(MCP1631/MCP1631V only)
- 20-Lead TSSOP (All Devices)
- 20-Lead SSOP (All Devices)
Applications
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
2007 Microchip Technology Inc. DS22063A-page 1MCP1631/HV/MCP1631V/VHV
Package Types
20-Lead SSOP and TSSOP
20-Lead SSOP and TSSOP
MCP1631/MCP1631V MCP1631HV/MCP1631VHV
PGND PGND
1 20 V 1 20 V
EXT
EXT
19 P P
2 2 19
SHDN VDD SHDN
VDD
OSC 18 CS/V OSC 18 CS/V
3 3
RAMP
IN IN RAMP
OSC 4 17 FB OSC 4 17 FB
DIS DIS
16 COMP 16 COMP
OV 5 OV 5
IN IN
V 6 15 IS V 6 15 IS
REF OUT REF OUT
14 14
A 7 VS A 7 VS
OUT OUT
GND GND
13 IS 13
8 NC 8 IS
NC
IN IN
NC 9 12 VS NC 9 12 VS
IN IN
A
11 10 11 A
NC 10 VDD_IN V
VDD_OUT
IN
20 19 1 8 17 16
A
1 15
GND P
GND
NC
2
14 V
EXT
A
3 13 P
VDD_IN
VDD
NC 4
12 NC
5
VS 11 CS/V
IN RAMP
6 7 8 9 10
20-Lead 4x4 QFN
MCP1631/MCP1631V
DS22063A-page 2 2007 Microchip Technology Inc.
V
IS
REF
IN
OV
VS
IN
OUT
OSC
IS
DIS
OUT
OSC
COMP IN
FB SHDN