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CL1 Simple, 90V, 20mA, Temperature Compensated, Constant Current, LED Driver IC
Features
5.0 to 90V operating range (VA-B) 20mA 5% at 45V (VA-B) -8.5A/C typical temperature coefficient Available in TO-243AA (SOT-89), TO-252 (D-PAK), & TO-92 packages No external components (two terminal device) Can be paralleled for higher current
General Description
The Supertex CL1 is a high voltage, temperature compensated, constant current source. The device is trimmed to provide a constant current of 20mA5% at an input voltage of 45V. No external components are required. The device can be used as a two terminal constant current source or constant current sink. A typical application for the CL1 is to drive LEDs with a constant current of 20mA. Multiple CL1s can also be used in parallel to provide higher currents such as 40mA, 60mA or 80mA. The device is available in TO-243AA (SOT-89), TO-252 (D-PAK), and TO-92 packages.
Applications
LED driver Industrial lamp indicators Signage Accent lighting Automotive Constant current source Constant current sink
Typical Application Circuit
VA
Functional Circuit Diagram
CL1
Up to 90V +VLED(total)
ILED 20mA
VB
VA
+
VLED(total)
Control Circuit and Temperature Compensation
-
VB
1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com
CL1
Ordering Information
Device CL1 Package Options TO-252 (D-PAK) CL1K4-G TO-92 CL1N3-G TO-243AA (SOT-89) CL1N8-G
VB
Pin Configurations
VA
N/C
VB
VA
-G indicates package is RoHS compliant (`Green')
TO-252 (D-PAK) (K4)
VA
TO-92 (N3)
NC
VB
VA
N/C
Absolute Maximum Ratings
Parameter Operating voltage, VA-B Operating junction temperature, TJ Storage temperature, TS Value 100V 0C to +125C -55C to +150C
TO-243AA (SOT-89) (N8)
Product Marking
Si YYWW CL1K4 LLLLLLL
YY = Year Sealed WW = Week Sealed L = Lot Number = "Green" Packaging
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.
TO-252 (D-PAK) (K4)
SiC L 1 YYWW
Thermal Characteristics
Package TO-252 TO-92 TO-243AA
*
YY = Year Sealed WW = Week Sealed = "Green" Packaging
Power Dissipation
@TA = 25OC (w)
(OC/W)
JC
(OC/W)
JA
TO-92 (N3)
CL1W
2.0* 0.73 1.3*
6.0 125 15
50* 170 78*
W = Code for week sealed = "Green" Packaging TO-243AA (SOT-89) (N8)
Mounted on FR4 board; 25mm x 25mm x 1.57mm
Electrical Characteristics (T = 25C unless otherwise specified)
A
Sym VA-B IA-B IA-B/T TJ RA-B
Parameter Maximum operating voltage Current regulation IA-B temperature coefficient Operating junction temperature AC resistance
Min 17.1 19.0 19.0 -40 -
Typ 18.0 20.0 22.0 -8.5 17
Max 90 18.9 21.0 24.2 125 -
Units V mA A/C
O
Conditions --VA-B = 5.0V VA-B = 45V VA-B = 90V VA-B = 45V, TJ = 0OC to 100OC --VA-B = 5.0V to 90V
C
k
1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com 2
CL1
Functional Block Diagram Diagram Functional Circuit
VA VA
Equivalent Block Diagram Equivalent Block Diagram
Control Circuit and Temperature Compensation
20mA 5%
VB
VB
Output Current vs Voltage
25 20
IA-B (mA)
15 10 5 0
0
10
20
30
40
50
60
70
80
90
100
VA-B (Volts)
CL1 for 120V Off-Line LED Driver
R
VA VB
CL1
ILED ~20mA
1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com 3
CL1
CL1 for Multiple LED Strings
VA
VA
VA
VA
Up to 90V
+V LED(total)
CL1
ILED ~20mA
VB
CL1
ILED ~20mA
VB
CL1
ILED ~20mA
VB
CL1
ILED ~20mA
VB
+
VLED(total)
-
CL1 for 120V Off-Line LED Driver
VA
VA
VA
Up to 90V +VLED(total)
CL1
VB
CL1
VB
CL1
+
VB
ILED ~60mA
VLED (total)
_
1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com 4
CL1 3-Lead TO-252 D-PAK Package Outline (K4)
b3 E E1 L3 1 D1 D H A c2
4
1
2
3
Note 1
L4
L5
b2
e
b
View B
Front View
Rear View
Side View
Gauge Plane L2 L L1
A1
Seating Plane
View B
Note: 1. Although 4 terminal locations are shown, only 3 are functional. Lead number 2 was removed. Symbol Dimension (inches) MIN NOM MAX A .086 .094 A1 .000* .005 b .025 .035 b2 .030 .045 b3 .195 .215 c2 .018 .035 D .235 .240 .245 D1 .205 .217* E .250 .265 E1 .170 .182* .090 BSC e H .370 .410 L .055 .060 .070 .108 REF .020 BSC L1 L2 L3 .035 .050 L4 .025* .040 L5 .045 .060 0
O
1 0O O
10
15O
JEDEC Registration TO-252, Variation AA, Issue E, June 2004. * This dimension is not specified in the JEDEC drawing. Drawings not to scale. Supertex Doc. #: DSPD-3TO252K4, Version E041309.
1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com 5
CL1 3-Lead TO-92 Package Outline (N3)
D
A Seating Plane 1 2 3
L
e1 e
b
c
Front View
Side View
E1
E 1 2 3
Bottom View
Symbol Dimensions (inches) MIN NOM MAX
A .170 .210
b .014 .022
c .014 .022
D .175 .205
E .125 .165
E1 .080 .105
e .095 .105
e1 .045 .055
L .500 .610*
JEDEC Registration TO-92. * This dimension is not specified in the JEDEC drawing. This dimension differs from the JEDEC drawing. Drawings not to scale. Supertex Doc.#: DSPD-3TO92N3, Version E041009.
1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com 6
CL1 3-Lead TO-243AA (SOT-89) Package Outline (N8)
b
b1
Symbol Dimensions (mm) MIN NOM MAX
A 1.40 1.60
b 0.44 0.56
b1 0.36 0.48
C 0.35 0.44
D 4.40 4.60
D1 1.62 1.83
E 2.29 2.60
E1 2.00 2.29
e 1.50 BSC
e1 3.00 BSC
H 3.94 4.25
L 0.89 1.20
JEDEC Registration TO-243, Variation AA, Issue C, July 1986. This dimension differs from the JEDEC drawing Drawings not to scale. Supertex Doc. #: DSPD-3TO243AAN8, Version E051509.
(The package drawings in this data sheet may not reflect the most current specifications. For the latest package outline information go to http://www.supertex.com/packaging.html.)
Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate "product liability indemnification insurance agreement." Supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. website: http//www.supertex.com.
(c)2009 All rights reserved. Unauthorized use or reproduction is prohibited.
Doc.# DSFP-CL1 C092409
1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com 7

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