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  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1631 Datasheet

Pulse Width Modulator

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MCP1631 pdf
MCP1631/HV/MCP1631V/VHV
High-Speed, Pulse Width Modulator
Features
• 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 ISNS Amplifier,
Battery Voltage VSNS 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)
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
General Description
The MCP1631/MCP1631V is a high-speed microcon-
troller based 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
multiple cells. By combining with a small microcontrol-
ler, 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 microcontrol-
ler and auxiliary circuits.
© 2007 Microchip Technology Inc.
DS22063A-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1631 Datasheet

Pulse Width Modulator

No Preview Available !

MCP1631 pdf
MCP1631/HV/MCP1631V/VHV
Package Types
20-Lead SSOP and TSSOP
MCP1631/MCP1631V
PGND 1
20 VEXT
SHDN 2
19 PVDD
OSCIN 3
18 CS/VRAMP
OSCDIS 4
17 FB
OVIN 5
16 COMP
VREF 6
15 ISOUT
AGND 7
14 VSOUT
NC 8
13 ISIN
NC 9
NC 10
12 VSIN
11 AVDD_IN
20-Lead SSOP and TSSOP
MCP1631HV/MCP1631VHV
PGND 1
20 VEXT
SHDN 2
19 PVDD
OSCIN 3
18 CS/VRAMP
OSCDIS 4
17 FB
OVIN 5
16 COMP
VREF 6
15 ISOUT
AGND
NC
7
8
14 VSOUT
13 ISIN
NC 9
12 VSIN
VIN 10
11 AVDD_OUT
AGND 1
NC 2
AVDD_IN 3
NC 4
VSIN 5
20 19 1 8 17 16
15 PGND
14 VEXT
13 PVDD
12 NC
11 CS/VRAMP
6 7 8 9 10
20-Lead 4x4 QFN
MCP1631/MCP1631V
DS22063A-page 2
© 2007 Microchip Technology Inc.


Part Number MCP1631
Description Pulse Width Modulator
Maker Microchip
Total Page 30 Pages
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