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Supertex inc.
CL220
Simple, 220V, 20mA,
Temperature-Compensated, Constant Current,
LED Driver IC
Features
5.0 to 220V operating range (VA-B)
20mA ±10% at 5.0 - 160V
0.01% / °C typical temperature coefficient
Available in TO-252 (D-PAK) and TO-220 packages
Can be paralleled for higher current
Applications
Industrial lamp indicators
Signage
Accent lightingConstant current source
Constant current sink
General Description
The Supertex CL220 is a high voltage, temperature-
compensated, 20mA constant current regulator. The device
operates at up to 220V, and is accurate to ±10% over a 5.0
- 160V range. The device can be used as a two terminal
constant current source or constant current sink.
A typical application for the CL220 is to drive LEDs with
a constant current of 20mA. Multiple CL220s can also be
used in parallel to provide higher currents such as 40mA,
60mA, 80mA, and so on. The device is available in the TO-
252 (D-PAK) and TO-220 packages.
Typical Application Circuit
Up to 220V
+ VLED(TOTAL)
10nF
ILED
20mA
VA
CL220
Functional
Circuit Diagram
VA
VB
+
Control Circuit
and Temperature
Compensation
VLED(TOTAL)
VB
Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com
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Ordering Information
Device
Package Options
TO-252 (D-PAK)
TO-220
CL220
CL220K4-G
-G indicates package is RoHS compliant (‘Green’)
CL220N5-G
Pin Configurations
VB
VB
CL220
Absolute Maximum Ratings
Parameter
Value
Operating voltage, VA-B
240V
Operating junction temperature, TJ
-40°C to +125°C
Storage temperature, TS
-55°C to +150°C
Absolute Maximum Ratings are those values beyond which damage to the
device may occur. Functional operation under these conditions is not implied.
Continuous operation of the device at the absolute rating level may affect
device reliability. All voltages are referenced to device ground.
Pin Designation
Pin Description
VA Current flows into this pin.
VB Current flows out of this pin.
NC
VA
TO-252 (D-PAK)
(front view)
VA NC
VB
TO-220
(front view)
Product Marking
Si YYWW
CL220
LLLLLLL
YY = Year Sealed
WW = Week Sealed
L = Lot Number
= “Green” Packaging
Packages may or may not include the following marks: Si or
TO-252 (D-PAK)
Top Marking
CL220
LLLLLLLLL
YYWW
L = Lot Number
YY = Year Sealed
WW = Week Sealed
= “Green” Packaging
Packages may or may not include the following marks: Si or
TO-220
Thermal Characteristics Guaranteed by design – not production tested
Sym Parameter
Min Typ Max
θjc
Thermal resistance, TO-252 (D-PAK)
junction to case
TO-220
-
-
6.3
8.3
-
-
θja
Thermal resistance, TO-252 (D-PAK)
junction to ambient
TO-220
-
-
78
70
-
-
Units Conditions
OC/W ---
OC/W
Soldered to 2.0cm2 exposed copper
free air area
Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com
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CL220
Electrical Characteristics (Tj = 25°C unless otherwise specified)
Sym Parameter
Min Typ Max
VA-B
ΔIA-B/ΔT
RA-B
Operating voltage
IA-B temperature coefficient
Dynamic resistance
5.0 - 220
- 0.01 -
- 300 -
18 20 22
IAB Output current
18 - 25
- - 22
IOS Turn-on overshoot current
tOS Overshoot duration
tDLY Turn-on delay
tRISE Turn-on rise time
- 25 -
-1-
- 10 -
- 200 -
Units Conditions
V ---
%/OC VA-B = 45V, Tj = -40OC to +100OC
---
VAB = 4.0 - 160V
mA VAB = 160 - 220V (Fig. 4)
VAB = 0 - 4.0V
mA VT = 45V (Fig. 5)
µs VT = 45V (Fig. 5)
µs VT = 45V (Fig. 5)
ns VT = 45V (Fig. 5)
Fig. 1 Functional Circuit Diagram
VA
Fig. 2 Equivalent Block Diagram
VA
Control Circuit
and Temperature
Compensation
20mA
VB
Fig. 3 Temperature Characteristics
1.02
1.01
1.00
VB
5V
45V
90V
0.99
0.98-55
-35 -15
5 25
45 65 85
Junction Temperature (°C)
105 125
145
Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com
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Fig. 4 Output Characteristics
30
25
20
15
10
5
0 0 5 10 15
CL220
scale change
20
VA-B (V)
60
100 140 180
220
Fig. 5 Timing Diagram
VT
VA-B
0V
IA-B
0mA
Turn-on overshoot due to
tDLY
start-up characteristics
of internal circuitry
tRISE
tOS
IOS
100%
90%
10%
Inrush spike due to charging
of parasitic capacitances
and dV/dt CDG feed-thru
Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com
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Fig. 6 Timing Test Circuit
VT
IA-B
CL220
1.0µF film
CL220
Fig. 7 CL220 for Multiple LED Strings
CL220
VA
CL220
VA
CL220
VA
Up to 220V
+VLED(TOTAL)
10nF
VB
ILED
20mA
VB
ILED
20mA
VB
ILED
20mA
CL220
VA
ILED
20mA
VB
+
VLED(TOTAL)
Fig. 8 CL220 for Higher Current
CL220
VA
CL220
VA
CL220
VA
Up to 220V
+VLED(TOTAL)
10nF
VB
VB
ILED
60mA
VB
+
VLED(TOTAL)
Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com
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