MCP1631-E/SS Microchip

MCP1631/HV/MCP1631V/VHV High-Speed, Pulse Width Modulator Features General Description Programmable Switching Battery Charger The MCP1631/MCP1631V is a high-speed Designs analog pulse width modulator (PWM) used to develop intelligent power systems. When combined with a High-Speed Analog PWM Controller microcontroller, the MCP1631/MCP1631V will control (2 MHz Operation) the power system duty cycle providing output voltage Combine with Microcontroller for Intelligent or current regulation. The microcontroller can be used Power System Development to adjust output voltage or current, switching frequency Peak Current Mode Control (MCP1631) and maximum duty cycle while providing additional Voltage Mode Control (MCP1631V) features making the power system more intelligent, High Voltage Options Operate to +16V Input: 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 - 250 mA maximum current microcontroller, intelligent LED lighting designs and External Oscillator Input sets Switching programmable SEPIC topology voltage and current Frequency and Maximum Duty Cycle Limit sources can also 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 microcontroller - 4 mm x 4 mm 20-Lead QFN 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 2008 Microchip Technology Inc. DS22063B-page 1MCP1631/HV/MCP1631V/VHV Package Types 20-Lead SSOP and TSSOP 20-Lead SSOP and TSSOP MCP1631/MCP1631V MCP1631HV/MCP1631VHV PGND 20 V PGND 20 1 1 V EXT EXT 19 P 2 2 19 P SHDN VDD SHDN VDD 18 CS/V 18 OSC 3 OSC 3 CS/V IN RAMP IN RAMP 17 FB 17 FB OSC 4 OSC 4 DIS DIS COMP COMP 5 16 5 16 OV OV IN IN V 15 IS V 15 IS 6 6 OUT OUT REF REF 7 14 VS 7 14 VS A A OUT OUT GND GND 8 13 IS 8 13 IS NC NC IN IN 12 NC 9 12 NC 9 VS VS IN IN A 11 11 A NC 10 V 10 VDD IN VDD OUT IN 20 19 1 8 17 16 A 1 15 GND P GND NC 2 14 V EXT EP A VDD IN 3 13 P VDD 21 NC 12 NC 4 CS/V 11 RAMP VS 5 IN 8 6 7 9 10 20 Lead 4x4 QFN MCP1631/MCP1631V DS22063B-page 2 2008 Microchip Technology Inc. V IS REF IN OV VS IN OUT IS OUT OSC DIS OSC COMP IN FB SHDN