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Supertex inc.
Simple 90V, 25mA,
Temperature Compensated,
Constant Current, LED Driver IC
CL25
Features
► 5.0 - 90V operating range (V
► 25mA ±10% at 5.0 - 90V
► 0.01%/°C typical temperature coefcient
► No external components (two terminal device)
► Can be paralleled for higher current
A-B
)
Applications
► LED channel lighting
► Industrial lamp indicators
► Accent lighting
Typical Application Circuit
VA
General Description
The Supertex CL25 is a high voltage, temperature
compensated, constant current source. The device is trimmed
to provide a constant current of 25mA±10% at an input
voltage of 5.0 - 90V. 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 CL25 is to drive LEDs with a
constant current of 25mA. Multiple CL2s can also be used
in parallel to provide higher currents such as 50mA, 75mA
or 100mA. The device is available in TO-92 and TO-243AA
(SOT-89) packaging.
Functional Circuit
Diagram
CL25
Up to 90V
+ V
LED(total)
I
LED
25mA
VB
+
V
LED(TOTAL)
-
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
Control Circuit
and Temperature
Compensation
VA
VB
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Ordering Information
W = Code for week sealed
Device
CL25 CL25N3-G CL25N8-G
-G indicates package is RoHS compliant (‘Green’)
CL25
Package Options
TO-92 TO-243AA (SOT-89)
Pin Conguration
VB
Thermal Characteristics
Power
Package
Dissipation
@TA = 25OC
(W)
θ
JC
(OC/W)
θ
JA
(OC/W)
TO-92 0.6 125 170
TO-243AA (SOT-89) 1.3* 15 78*
* Mounted on FR4 board; 25mm x 25mm x 1.57mm
Absolute Maximum Ratings
Parameter Value
Operating voltage, V
Operating junction temperature, T
Storage temperature, T
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.
100V
A-B
J
S
-40°C to +125°C
-55°C to +150°C
Electrical Characteristics
(TA = 25°C unless otherwise specied)
VB
VA
VA
VB
NC
TO-92 (N3)
NC = No Connect
TO-243AA (SOT-89) (N8)
Product Marking
SiCL
25
YYWW
Package may or may not include the following marks: Si or
C25W
Package may or may not include the following marks: Si or
YY = Year Sealed
WW = Week Sealed
= “Green” Packaging
TO-92 (N3)
= “Green” Packaging
TO-243AA (SOT-89) (N8)
N/C
Sym Parameter Min Typ Max Units Conditions
Operating voltage 5.0 - 90 V ---
Current regulation 22.5 25 27.5 mA V
temperature coefcient - 0.01 - %/OC V
A-B
Operating junction temperature -40 - 125
O
C ---
Dynamic resistance - 300 - kΩ ---
= 5.0V - 90V
A-B
= 45V, TJ = -40OC to +100OC
A-B
ΔI
V
A-B
I
A-B
/ΔT I
A-B
T
J
R
A-B
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
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CL25
Temperature (°C)
VA
Functional Circuit Diagram
Control Circuit
and Temperature
Compensation
VB
Temperature Characteristics
1.02
1.01
Equivalent Block Diagram
VA
25mA
±10%
VB
1.00
0.99
Current, normalized to 25°C
0.98
Output Current vs Voltage
30
25
20
(mA)
15
A-B
I
10
5V
10V
30V
45V
90V
-55 -35 -15 5 25 45 65 85 105
5
0
0 10 20 30 40 50 60 70 80 90 100
V
A-B
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
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CL25 for Multiple LED Strings
CL25
Up to 90V
+V
LED(TOTAL)
CL25 for Higher Current
VA
Up to 90V
+V
LED(TOTAL)
CL25
I
LED
25mA
VB
CL25
CL25
I
LED
25mA
VA
VB
VA
VB
CL25
CL25
I
LED
25mA
VA
VB
I
75mA
VA
VB
LED
CL25
+
V
LED(TOTAL)
-
VA
VB
25mA
CL25
I
LED
VA
VB
+
V
LED(TOTAL)
-
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
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3-Lead TO-92 Package Outline (N3)
D
Seating
Plane
1 2 3
L
CL25
A
Front View
E1
1
Bottom View
e1
2
b
c
e
Side View
E
3
Symbol A b c D E E1 e e1 L
MIN .170 .014
Dimensions
(inches)
NOM - - - - - - - - -
MAX .210 .022
JEDEC Registration TO-92.
* This dimension is not specied in the JEDEC drawing.
† This dimension differs from the JEDEC drawing.
Drawings not to scale.
Supertex Doc.#: DSPD-3TO92N3, Version E041009.
†
†
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
.014
.022
†
.175 .125 .080 .095 .045 .500
†
.205 .165 .105 .105 .055 .610*
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Supertex inc.
94089
.supertex.com
3-Lead TO-243AA (SOT-89) Package Outline (N8)
D
D1
H
E
E1
C
CL25
L
12 3
b
e
e1
Top View
b1
A
Side View
Symbol A b b1 C D D1 E E1 e e1 H L
†
1.50
BSC
3.00
BSC
3.94 0.73
Dimensions
(mm)
MIN 1.40 0.44 0.36 0.35 4.40 1.62 2.29 2.00
NOM - - - - - - - - - -
MAX 1.60 0.56 0.48 0.44 4.60 1.83 2.60 2.29 4.25 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 F111010.
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)
©2011 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited.
Doc.# DSFP-CL25
A040511
1235 Bordeaux Drive, Sunnyvale, CA
6
Tel: 408-222-8888
www
†
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