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MCP1630 Datasheet

  • MCP1630

  • High-Speed, Microcontroller-Adaptable,Pulse Width Modulator

  • 561.12KB

  • 26頁

  • Microchip   Microchip

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MCP1630
High-Speed, Microcontroller-Adaptable,
Pulse Width Modulator
Features
鈥?High-Speed PWM Operation (12 ns Current
Sense to Output Delay)
鈥?Operating Temperature Range: -40擄C to +125擄C
鈥?Precise Peak Current Limit (鹵5%)
鈥?CMOS Output Driver (Drives MOSFET Driver or
Low-Side N-channel MOSFET Directly)
鈥?External Oscillator Input (from PICmicro
廬
Microcontroller)
鈥?External Voltage Reference Input (for adjustable
voltage or current output application)
鈥?Peak Current Mode Operation to 1 MHz
鈥?Low Operating Current: 2.8 mA, typical
鈥?Fast Output Rise and Fall Times (5.9 ns and
6.2 ns)
鈥?Undervoltage Lockout
鈥?Output Short Circuit Protection
鈥?Overtemperature Protection
Description
The MCP1630 is a high-speed Pulse Width Modulator
(PWM) used to develop intelligent power systems.
When used with a microcontroller, the MCP1630 will
control the power system duty cycle to provide output
voltage or current regulation. The microcontroller can
be used to adjust output voltage or current, switching
frequency, maximum duty cycle and other features
making the power system more intelligent and
adaptable.
Typical applications include smart battery chargers,
intelligent power systems, brick DC/DC converters, AC
power-factor correction, multiple output power supplies,
multi-phase power supplies and more.
The MCP1630 inputs were developed to be easily
attached to the I/O of a microcontroller. The microcon-
troller supplies the oscillator and reference to the
MCP1630 to provide the most flexible and adaptable
power system. The power system switching frequency
and maximum duty cycle are set using the I/O of the
microcontroller. The reference input can be external, a
D/A converter output or as simple as an I/O output from
the microcontroller. This enables the power system to
adapt to many external signals and variables in order to
optimize performance and facilitate calibration.
When operating in current mode, a precise limit is set on
the peak current. With the fast comparator speed (typi-
cally 12 ns), the MCP1630 is capable of providing a
tight limit on the maximum switch current over a wide
input voltage range when compared to other high-speed
PWM controllers.
Additional protection features include: undervoltage
lockout, overtemperature and overcurrent.
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Intelligent Power Systems
Smart Battery Charger Applications
Multiple Output/Multiple Phase Converters
Output Voltage Calibration
AC Power Factor Correction
VID Capability (Programmed and calibrated by
PICmicro Microcontroller)
鈥?Buck/Boost/Buck-Boost/SEPIC/Flyback/Isolated
Converters
鈥?Parallel Power Supplies
Package Type
8-Pin MSOP
COMP
FB
CS
OSC IN
1
2
3
4
8
7
6
5
MCP1630
V
REF
V
IN
V
EXT
GND
錚?/div>
2004 Microchip Technology Inc.
DS21896A-page 1

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