MCP1631T-E/ST Microchip

MCP1631/HV/MCP1631V/VHV High-Speed, Pulse Width Modulator Features General Description Programmable Switching Battery Charger The MCP1631/MCP1631V is a high-speed microcon- Designs troller based pulse width modulator (PWM) used to develop intelligent power systems. When combined High-Speed Analog PWM Controller (2 MHz with a microcontroller, the MCP1631/MCP1631V will Operation) control the power system duty cycle providing output Combine with Microcontroller for Intelligent voltage or current regulation. The microcontroller can Power System Development be used to adjust output voltage or current, switching Peak Current Mode Control (MCP1631) frequency and maximum duty cycle while providing Voltage Mode Control (MCP1631V) additional features making the power system more High Voltage Options Operate to +16V Input: intelligent, 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 microcontrol- - 250 mA maximum current ler, intelligent LED lighting designs and programmable External Oscillator Input sets Switching SEPIC topology voltage and current sources can also Frequency and Maximum Duty Cycle Limit 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 microcontrol- - 4 mm x 4 mm 20-Lead QFN ler 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 2007 Microchip Technology Inc. DS22063A-page 1MCP1631/HV/MCP1631V/VHV Package Types 20-Lead SSOP and TSSOP 20-Lead SSOP and TSSOP MCP1631/MCP1631V MCP1631HV/MCP1631VHV PGND PGND 1 20 V 1 20 V EXT EXT 19 P P 2 2 19 SHDN VDD SHDN VDD OSC 18 CS/V OSC 18 CS/V 3 3 RAMP IN IN RAMP OSC 4 17 FB OSC 4 17 FB DIS DIS 16 COMP 16 COMP OV 5 OV 5 IN IN V 6 15 IS V 6 15 IS REF OUT REF OUT 14 14 A 7 VS A 7 VS OUT OUT GND GND 13 IS 13 8 NC 8 IS NC IN IN NC 9 12 VS NC 9 12 VS IN IN A 11 10 11 A NC 10 VDD_IN V VDD_OUT IN 20 19 1 8 17 16 A 1 15 GND P GND NC 2 14 V EXT A 3 13 P VDD_IN VDD NC 4 12 NC 5 VS 11 CS/V IN RAMP 6 7 8 9 10 20-Lead 4x4 QFN MCP1631/MCP1631V DS22063A-page 2 2007 Microchip Technology Inc. V IS REF IN OV VS IN OUT OSC IS DIS OUT OSC COMP IN FB SHDN