Installation and Operation

 2017 Microchip Technology Inc.

DS50002686A-page 13

FIGURE 2-2:

MCP1665 12V Output Boost Regulator Evaluation Board Setup.

2.2.1.3

The top circuit comes with the output voltage set to 12V. If a different output is desired,

recalculate the resistor divider (RT1 and RB1) using Equation 2-1.

EQUATION 2-1:

For output voltages higher than 15V, the inductor value should be increased. See

Table 2-1 for more information.

2.3

TEST RESULTS FOR TYPICAL APPLICATION USING MCP1665

2.3.1

Test Results for MCP1665

This chapter provides specific operation waveforms and graphs. Refer to the MCP1665

Data Sheet (DS20005872A) for more information.

V-meter

-

+

POWER

SUPPLY

Electronic

Resistive

Load

or

V-meter

Extra Input

Capacitor

Place

MODE = PWM Only

MODE = PFM/PWM

RT Spare Resistors Area

Switch Node Test Point

Enable Jumper

TABLE 2-1:

RECOMMENDED RESISTOR DIVIDER AND INDUCTOR VALUES

Inductor Value

RT

RB

6.0V

4.7 μH

80.6 kΩ

20 kΩ

9.0V

4.7 μH

130 kΩ

20 kΩ

12V

4.7 μH

180 kΩ

20 kΩ

24V

10 μH

383 kΩ

20 kΩ

32V

10 μH

513 kΩ

20 kΩ

RT

RB

--------------



 1

–



=

Where