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CL25
Simple 90V, 25mA, Temperature Compensated,
Constant Current, LED Driver IC
Features
5.0V to 90V operating range (VA-B)
25mA ±10% at 5-90V
0.01% / °C typical temperature coefficient
No external components (two terminal device)
www.DCaatanShbeeept4aUr.aclolemled 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 5-90V. 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. They 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
Up to 90V
+ VLED(total)
ILED
25mA
VA
CL25
VB
+
VLED(total)
-
Functional Circuit Diagram
VA
Control Circuit
and Temperature
Compensation
VB

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CL25
Ordering Information
Device
Package Options
TO-92
TO-243AA (SOT-89)
CL25
CL25N3-G
CL25N8-G
-G indicates package is RoHS compliant (‘Green’)
Thermal Characteristics
Package
TO-92
Power
Dissipation
@TA = 25OC
0.6W
θJC
OC/W
125
wwTwO.D-a2t4a3SAheAe(t4SUO.cTo-m89)
1.3W*
15
* Mounted on FR4 board; 25mm x 25mm x 1.57mm
θJA
OC/W
170
78*
Pin Configuration
VB
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.
VA NC VB
TO-92
(front view)
VA VB NC
TO-243AA
(top view)
NC = No Connect
Electrical Characteristics
(TJ=25°C unless otherwise specified)
Symbol Parameter
VA-B
IA-B
ΔIA-B/ΔT
TJ
RA-B
Operating voltage
Current regulation
IA-B temperature coefficient
Operating junction temperature
Dynamic resistance
Min
5
22.5
-
-40
-
Typ
-
25
0.01
-
300k
Max
90
27.5
-
125
-
Units Conditions
V ---
mA
%/OC
OC
VA-B = 5V - 90V
VA-B = 45V, TJ = -40OC to +100OC
---
Ω ---
Functional Circuit Diagram
VA
Equivalent Block Diagram
VA
Control Circuit
and Temperature
Compensation
VB
25mA
±10%
VB
2

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Temperature Characteristics
1.02
1.01
1.00
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0.99 5V
10V
30V
45V
90V
0.98
-55 -35 -15 5 25 45 65 85 105
Temperature (°C)
Output Current vs Voltage
30
25
20
15
10
5
0 0 10 20 30 40 50 60 70 80 90 100
VA-B
CL25
3

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CL25 for Multiple LED Strings
VA
VA
VA
Up to 90V
+VLED(TOTAL)
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CL25 VB
CL25 VB
CL25 VB
ILED
25mA
ILED
25mA
ILED
25mA
CL25
VA
CL25 VB
ILED
25mA
+
VLED(TOTAL)
-
CL25 for Higher Current
VA VA VA
Up to 90V
+VLED(TOTAL)
CL25 VB
CL25 VB
CL25 VB
ILED
75mA
+
VLED(TOTAL)
_
4

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3-Lead TO-92 Package Outline (N3)
0.135 MIN
0.080 - 0.105
1
23
Top View
0.170 - 0.210
0.175 - 0.205
0.125 - 0.165
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Seating Plane
123
0.500 MIN
0.014 - 0.022
0.014 - 0.022
0.095 - 0.105
0.045 - 0.055
Front View
Side View
Notes:
All dimensions are in millimeters; all angles in degrees.
3-Lead TO-243AA (SOT-89) Package Outline (N8)
4.50 ± 0.10
1.72 ± 0.10
0.40 ± 0.05
1.50 ± 0.10
4.10 ± 0.15
2.45 ± 0.15
2.21 ± 0.08
CL25
Exclusion Zone
No Vias/Traces in
this area. Shape
of pad may vary.
1.05 ± 0.15
0.42 ± 0.06
0.5 ± 0.06
1.50 BSC
3.00 BSC
Top View
Side View
Bottom View
Notes:
All dimensions are in millimeters; all angles in degrees.
(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.)
Doc.# DSFP-CL25
A121506
5