Microchip Technology MIC4802, User Manual

Page: 10 / 27

MIC4802 Evaluation Board User’s Guide
DS-50002780A-page 10

2018 Microchip Technology Inc.
FIGURE 1-1: MIC4802 Typical Application.
1.3 MIC4802 EVALUATION BOARD DESCRIPTION
The board is populated with the MIC4802YME device and uses a high power white
LED as a load. The MIC4802 Evaluation Board has been developed to evaluate a
typical application, where V
IN
is between 3.0V to 5.5V and current trough LED is fixed
to 600 mA.
The MIC4802 Evaluation Board features an independent Enable connector (JP1). To
disable the LED driver, it is necessary to insert a jumper in the JP1 header. Since it’s
not recommended to leave the EN pin floating, the MIC4802 Evaluation Board features
a 10 k
Ω pull-up resistor to V
IN
, so the default value when the board is powered is ON.
The EN pin can also be used as a PWM input for dimming the LED brightness. The
PWM signal must be between 200 Hz and 500 kHz.
FIGURE 1-2: MIC4802 Evaluation Board – Schematic.
1.4 MIC4802 EVALUATION BOARD KIT CONTENTS
The MIC4802 Evaluation Board kit includes:
• MIC4802 Evaluation Board (ADM00942)
• Information Sheet
2.2 μ F
6.19 k Ω
EN
V
IN
D1
V
IN
EN
MIC4802YME
Low
Dropout
Linear
Driver
PWM
Control
LED
D1
D1
D1
R
SET
GND
2.2 μ F
8.2 k Ω
EN
V
IN
D1
V
IN
EN
MIC4802YME
Low
Dropout
Linear
Driver
PWM
Control
LED1
D1
D1
D1
RSET
GND
D1
EPAD
10 k Ω
0W
2.2 μ F
V
BAT
JP1
R3
R4
C1
C2
R1
R2
100 k Ω
DNP
DNP