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  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1630V Datasheet

Pulse Width Modulator

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MCP1630/MCP1630V
High-Speed, Microcontroller-Adaptable,
Pulse Width Modulator
Features
• High-Speed PWM Operation (12 ns Current
Sense to Output Delay)
• Operating Temperature Range:
- -40°C to +125°C
• Precise Peak Current Limit (±5%) (MCP1630)
• Voltage Mode and Average Current Mode Control
(MCP1630V)
• CMOS Output Driver (drives MOSFET driver or
low-side N-channel MOSFET directly)
• External Oscillator Input
(from PICmicro® Microcontroller (MCU))
• External Voltage Reference Input (for adjustable
voltage or current output application)
• Peak Current Mode Operation > 1 MHz
• Low Operating Current: 2.8 mA (typ.)
• Fast Output Rise and Fall Times: 5.9 ns and
6.2 ns
• Undervoltage Lockout (UVLO) Protection
• Output Short Circuit Protection
• Overtemperature Protection
Applications
• 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)
• Buck/Boost/Buck-Boost/SEPIC/Flyback/Isolated
Converters
• Parallel Power Supplies
Related Literature
• “MCP1630 NiMH Demo Board User’s Guide”,
Microchip Technology Inc., DS51505, 2004
• “MCP1630 Low-Cost Li-Ion Battery Charger
User’s Guide”, Microchip Technology Inc.,
DS51555, 2005
• “MCP1630 Li-Ion Multi-Bay Battery Charger
User’s Guide”, Microchip Technology Inc.,
DS51515, 2005
• “MCP1630 Dual Buck Demo Board User’s Guide”,
Microchip Technology Inc., DS51531, 2005
Description
The MCP1630/V is a high-speed Pulse Width Modula-
tor (PWM) used to develop intelligent power systems.
When used with a microcontroller unit (MCU), the
MCP1630/V will control the power system duty cycle to
provide output voltage or current regulation. The MCU
can be used to adjust output voltage or current, switch-
ing frequency, maximum duty cycle and other features
that make the power system more intelligent.
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/V inputs were developed to be easily
attached to the I/O of a MCU. The MCU supplies the
oscillator and reference to the MCP1630/V 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 MCU. The reference
input can be external, a D/A Converter (DAC) output or
as simple as an I/O output from the MCU. 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
(typically 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.
For Voltage mode or Average Current mode
applications, the MCP1630V provides a larger range for
the external ramp voltage.
Additional protection features include: UVLO,
overtemperature and overcurrent.
Package Type
8-Lead DFN
(2 mm x 3 mm)
8-Lead MSOP
COMP 1
FB 2
CS 3
OSC IN 4
8 VREF
7 VIN
6 VEXT
5 GND
COMP 1
FB 2
CS 3
OSC IN 4
8 VREF
7 VIN
6 VEXT
5 GND
© 2005 Microchip Technology Inc.
DS21896B-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1630V Datasheet

Pulse Width Modulator

No Preview Available !

MCP1630/MCP1630V
Functional Block Diagram – MCP1630
VIN
0.1 µA
OSC IN
VIN
MCP1630 High-Speed PWM
Overtemperature
UVLO
VIN
VEXT
Note
SQ
GND
0.1 µA
CS
COMP
+
Comp
R
Q
VIN
FB
VREF
EA
+
2R
R
2.7V Clamp
Note: During overtemperature, VEXT driver is high-impedance.
Latch Truth Table
SRQ
0 0 Qn
011
100
111
100 kΩ
DS21896B-page 2
© 2005 Microchip Technology Inc.


Part Number MCP1630V
Description Pulse Width Modulator
Maker Microchip
Total Page 26 Pages
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