MCP1630-E/MS Microchip

MCP1630/MCP1630V High-Speed, Microcontroller-Adaptable, Pulse Width Modulator Features Description High-Speed PWM Operation (12 ns Current The MCP1630/V is a high-speed Pulse Width Modula- Sense to Output Delay) tor (PWM) used to develop intelligent power systems. When used with a microcontroller unit (MCU), the Operating Temperature Range: MCP1630/V will control the power system duty cycle to - -40C to +125C provide output voltage or current regulation. The MCU Precise Peak Current Limit (5%) (MCP1630) can be used to adjust output voltage or current, switch- Voltage Mode and Average Current Mode Control ing frequency, maximum duty cycle and other features (MCP1630V) that make the power system more intelligent. CMOS Output Driver (drives MOSFET driver or Typical applications include smart battery chargers, low-side N-channel MOSFET directly) intelligent power systems, brick dc/dc converters, ac External Oscillator Input power-factor correction, multiple output power supplies, (from PIC Microcontroller (MCU)) multi-phase power supplies and more. External Voltage Reference Input (for adjustable The MCP1630/V inputs were developed to be easily voltage or current output application) attached to the I/O of a MCU. The MCU supplies the Peak Current Mode Operation > 1 MHz oscillator and reference to the MCP1630/V to provide Low Operating Current: 2.8 mA (typ.) the most flexible and adaptable power system. The power system switching frequency and maximum duty Fast Output Rise and Fall Times: 5.9 ns and cycle are set using the I/O of the MCU. The reference 6.2 ns input can be external, a D/A Converter (DAC) output or Undervoltage Lockout (UVLO) Protection as simple as an I/O output from the MCU. This enables Output Short Circuit Protection the power system to adapt to many external signals Overtemperature Protection and variables in order to optimize performance and facilitate calibration. Applications When operating in Current mode, a precise limit is set Intelligent Power Systems on the peak current. With the fast comparator speed Smart Battery Charger Applications (typically 12 ns), the MCP1630 is capable of providing a Multiple Output/Multiple Phase Converters tight limit on the maximum switch current over a wide Output Voltage Calibration input voltage range when compared to other high-speed AC Power Factor Correction PWM controllers. VID Capability (programmed and calibrated by For Voltage mode or Average Current mode PIC microcontroller) applications, the MCP1630V provides a larger range for the external ramp voltage. Buck/Boost/Buck-Boost/SEPIC/Flyback/Isolated Converters Additional protection features include: UVLO, Parallel Power Supplies overtemperature and overcurrent. Related Literature Package Type MCP1630 NiMH Demo Board Users Guide, Microchip Technology Inc., DS51505, 2004 8-Lead DFN 8-Lead MSOP (2 mm x 3 mm) MCP1630 Low-Cost Li-Ion Battery Charger Users Guide, Microchip Technology Inc., COMP COMP 1 8 V 1 8 V REF REF DS51555, 2005 FB 2 7 V FB 2 7 V IN IN MCP1630 Li-Ion Multi-Bay Battery Charger CS 3 6 V CS 3 6 Users Guide, Microchip Technology Inc., V EXT EXT DS51515, 2005 OSC IN 4 5 GND OSC IN 4 5 GND MCP1630 Dual Buck Demo Board Users Guide, Microchip Technology Inc., DS51531, 2005 2004-2013 Microchip Technology Inc. DS21896C-page 1MCP1630/MCP1630V Functional Block Diagram MCP1630 MCP1630 High-Speed PWM V IN V IN Overtemperature 0.1 A UVLO V EXT OSC IN Note S GND V Q IN 0.1 A 100 k CS Q + R Comp COMP V IN Latch Truth Table FB SR Q EA V REF 00 Qn + 2R 011 R 100 2.7V Clamp 111 Note: During overtemperature, V driver is high-impedance. EXT DS21896C-page 2 2004-2013 Microchip Technology Inc.