Supertex inc.
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
CL25
Features
►5.0 - 90V operating range (VA-B)
►25mA ±10% at 5.0 - 90V
►0.01%/°C typical temperature coefcient
►No external components (two terminal device)
►Can be paralleled for higher current
Applications
►LED channel lighting
►Industrial lamp indicators
►Accent lighting
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.
Typical Application Circuit
Simple 90V, 25mA,
Temperature Compensated,
Constant Current, LED Driver IC
ILED
25mA
VA
VB
Up to 90V
+ VLED(total)
VA
Control Circuit
and Temperature
Compensation
VB
Functional Circuit
Diagram
CL25
+
VLED(TOTAL)
-
2
CL25
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
Ordering Information
Device Package Options
TO-92 TO-243AA (SOT-89)
CL25 CL25N3-G CL25N8-G
-G indicates package is RoHS compliant (‘Green’)
Absolute Maximum Ratings
Parameter Value
Operating voltage, VA-B 100V
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.
Thermal Characteristics
Package
Power
Dissipation
@TA = 25OC
(W)
θJC
(OC/W)
θJA
(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
Sym Parameter Min Typ Max Units Conditions
VA-B Operating voltage 5.0 - 90 V ---
IA-B Current regulation 22.5 25 27.5 mA VA-B = 5.0V - 90V
ΔIA-B/ΔT IA-B temperature coefcient - 0.01 - %/OC VA-B = 45V, TJ = -40OC to +100OC
TJOperating junction temperature -40 - 125 OC ---
RA-B Dynamic resistance - 300 - kΩ ---
Electrical Characteristics
(TA = 25°C unless otherwise specied)
NC = No Connect
Product Marking
YY = Year Sealed
WW = Week Sealed
= “Green” Packaging
SiCL
25
YYWW
C25W
W = Code for week sealed
= “Green” Packaging
TO-243AA (SOT-89) (N8)
TO-92 (N3)
TO-92 (N3) TO-243AA (SOT-89) (N8)
Pin Conguration
Package may or may not include the following marks: Si or
Package may or may not include the following marks: Si or
VA
N/C
VB
VB
NC
VA
VB
3
CL25
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
Output Current vs Voltage
0 10 20 30 40 50 60 70 80 90 100
VA-B
I A-B (mA)
30
25
20
15
10
5
0
Temperature Characteristics
1.02
1.01
1.00
0.99
0.98-55 -35 -15 5 25 45 65 85 105
Temperature (°C)
Current, normalized to 25°C
5V
10V
30V
45V
90V
Functional Circuit Diagram Equivalent Block Diagram
VA
Control Circuit
and Temperature
Compensation
VB
25mA
±10%
VA
VB
4
CL25
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
CL25 for Higher Current
VB
VA
CL25
Up to 90V
+VLED(TOTAL) VB
VA
CL25
ILED
75mA
VB
VA
CL25
+
VLED(TOTAL)
-
CL25 for Multiple LED Strings
VB
VA
CL25
Up to 90V
+VLED(TOTAL) VB
VA
CL25 VB
VA
CL25 VB
VA
CL25
+
VLED(TOTAL)
-
ILED
25mA
ILED
25mA
ILED
25mA
ILED
25mA
5
CL25
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
3-Lead TO-92 Package Outline (N3)
Symbol A b c D E E1 e e1 L
Dimensions
(inches)
MIN .170 .014†.014†.175 .125 .080 .095 .045 .500
NOM - - - - - - - - -
MAX .210 .022†.022†.205 .165 .105 .105 .055 .610*
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.
Seating
Plane
1
2
3
Front View Side View
Bottom View
E1 E
D
e1
L
e
c
1 2 3
b
A
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.
Supertex inc.
1235 Bordeaux Drive, Sunnyvale, CA
94089
Tel: 408-222-8888
www
.supertex.com
6
CL25
Doc.# DSFP-CL25
A040511
3-Lead TO-243AA (SOT-89) Package Outline (N8)
Symbol A b b1 C D D1 E E1 e e1 H L
Dimensions
(mm)
MIN 1.40 0.44 0.36 0.35 4.40 1.62 2.29 2.00†
1.50
BSC
3.00
BSC
3.94 0.73†
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.
bb1
D
D1
EHE1
C
A
12 3
e
e1
Top View Side View
L
