MCP1630RD-SALED Microchip Technology, MCP1630RD-SALED Datasheet - Page 9

• Manufacturer Part Number: MCP1630RD-SALED
• Description: Power Management IC Development Tools MCP1630 Sepic Automotive LED Drvr
• Manufacturer: Microchip Technology
• Type: DC/DC Converters, Regulators & Controllersr

Specifications of MCP1630RD-SALED

• Rohs: yes
• Product: Reference Designs
• Tool Is For Evaluation Of: MCP1630
• Input Voltage: 9 V to 16 V
• Output Voltage: 55 V
• Output Current: 350 mA

1.1
© 2011 Microchip Technology Inc.
INTRODUCTION
The MCP1630 Sepic Automotive LED Driver Reference Design is a step-up/down,
Switch mode, DC-DC converter used for powering LED applications. The demo board
provides a 350 mA (700 mA, with hardware modification) constant current source.
Other output currents can be obtained with minor modifications to the board
components’ values.
The MCP1630 Sepic Automotive LED Driver Reference Design sustains the
high-voltage peaks that can be found in typical automotive applications. This board
provides useful information about typical high-voltage applications that can be found in
the automotive field.
The MCP1630 Sepic Automotive LED Driver Reference Design utilizes Microchip’s
MCP1630 high-speed, Pulse-Width Modulator (PWM) device. The 8-pin MCP1630
device contains all the analog components necessary for a peak current switch-mode
control loop, including an error amplifier, a PWM comparator and a high-current driver
output pin. The switching frequency and the maximum duty cycle for the MCP1630 are
determined by an external clock source.
An 8-pin PIC12F683 microcontroller is used to provide a 330 kHz switching clock for
the MCP1630 device. In addition, the PIC12F683 firmware supervises the input and
output voltage, and can optionally dim the LEDs when a button is attached.
In this reference design, the MCP1630 device is used for Peak Current Mode Control
in a SEPIC power train circuit. Because the duty cycle exceeds 50%, a ramp generator
provides an additional reference signal to the MCP1630 for slope compensation.
Note:
Chapter 1. Product Overview
This application uses a Peak Current Mode Control. Use only the MCP1630
device option for this board.
MCP1630 SEPIC AUTOMOTIVE LED
DRIVER REFERENCE DESIGN
DS51955A-page 9