Product Overview
2018 Microchip Technology Inc.
DS50002772A-page 11
FIGURE 1-1:
Typical CL88030 230 V
AC
Offline LED Driver Evaluation Board Circuit.
1.4
WHAT IS THE CL88030 230 V
AC
OFFLINE LED DRIVER EVALUATION
BOARD (ADM00860)?
The CL88030 230 V
AC
Offline LED Driver Evaluation Board (ADM00860) and a
designated LED Load Board (ADM00861) represent a complete solution for a LED
lighting application, powered directly from the 230 V
AC
line and based on Microchip
Technology's CL88030 sequential linear LED driver. The application achieves efficient
operation without magnetics or conventional switching techniques and is a flexible
solution that allows users to design and test their own LED Load. The available LED
Load is made with 12 LEDs. Since no high frequencies are present, it exhibits inher-
ently low conducted and radiated EMI without the need of input filters or shielding.
Because the current through the LEDs follows the AC input voltage, Power Factor
Correction (PFC) circuitry is not needed. With the addition of an RC network, the
CL88030 is compatible with both leading-edge and trailing-edge dimmers.
GND
GND
GND
GND
1
2
CRPL2
15uF
1
2
CRPL1
15uF
GND
1
2
3
MMBD1503A
D3
1
2
3
MMBD1503A
D2
387V
600V
1A
GND
7.5R
Rset1
3.24R
Rset2
28k
Ralr2
221k
Rotpu
200k
Rbias
4.7uF
Cbias
4.7uF
Calr
TP1
TP2
TP9
TP10
TP6
TP7
TP5
TP8
TP3
TP4
TP14
TP13
TP12
TP11
11
2
J1
MOV1
4
1
2
3
~
~
+
-
D1
10R
Rtp1
10R
Rtp2
0R
Rotpl
1M
Ralr1
-t
470k
Rntc
GND
(24.8V, 10..200mA)
2
1
3
Q1
2
1
3
Q2
2
1
3
Q3
2
1
3
Q4
GT1 1
GT2 2
GT3 3
GT4 4
NC 5
NC 6
CS
7
OTP
8
BIAS
9
ALR
10
GND
11
CL88030
IC1
Note:
The LED Load (ADM00861) is provided on a double-layer 60 mm diameter
FR4 (0.6 mm thick) PCB, ready to be mounted on a pin-fin heat sink. The
kit includes a black anodized pin-fin heat sink and a double-sided adhesive
thermal tape necessary to mount the LED Load on it. The LED Load is also
developed to be used with another LED Driver board from the CL88 series
(ADM00866, CL8800 LED Driver Board), so it is equipped with a selectable
(by means of a jumper) NTC or PTC thermistor, making Overtemperature
Protection (OTP) possible. For the current application, the selection acti-
vates the NTC thermistor by mounting the jumper between positions 2 and
3 of the J4 header.
