CL25 Simple 90V, 25mA, Temperature Compensated, Constant Current, LED Driver IC Features 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. 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) Can be paralleled for higher current 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. Applications ► LED channel lighting ► Industrial lamp indicators ► Accent lighting Typical Application Circuit Functional Circuit Diagram VA VA CL25 Up to 90V + VLED(total) Control Circuit and Temperature Compensation VB + ILED 25mA VLED(total) - VB CL25 Ordering Information Package Options Device CL25 TO-92 TO-243AA (SOT-89) CL25N3-G CL25N8-G -G indicates package is RoHS compliant (‘Green’) Thermal Characteristics Pin Configuration Package Power Dissipation @TA = 25OC TO-92 0.6W 125 170 TO-243AA (SOT-89) 1.3W* 15 78* θJC C/W O θJA C/W VB O * Mounted on FR4 board; 25mm x 25mm x 1.57mm 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 VA VA NC VB VB NC TO-243AA TO-92 (top view) (front view) NC = No Connect 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. Electrical Characteristics (TJ=25°C unless otherwise specified) Symbol Parameter Min Typ Max Units VA-B Operating voltage 5 - 90 V IA-B Current regulation 22.5 25 27.5 mA ΔIA-B/ΔT IA-B temperature coefficient TJ Operating junction temperature RA-B Dynamic resistance - 0.01 - -40 - 125 - 300k - Conditions --VA-B = 5V - 90V O VA-B = 45V, TJ = -40OC to +100OC C --- Ω --- %/ C O Equivalent Block Diagram Functional Circuit Diagram VA VA Control Circuit and Temperature Compensation 25mA ±10% VB VB 2 CL25 Temperature Characteristics Current, normalized to 25°C 1.02 1.01 1.00 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 I A-B (mA) 25 20 15 10 5 0 0 10 20 30 40 50 VA-B 3 60 70 80 90 100 CL25 CL25 for Multiple LED Strings VA VA VA VA Up to 90V +VLED(TOTAL) CL25 VB CL25 CL25 VB CL25 VB VB + ILED 25mA ILED 25mA ILED 25mA ILED 25mA VLED(TOTAL) - CL25 for Higher Current VA Up to 90V +VLED(TOTAL) CL25 VA CL25 VB VB VA CL25 VB + ILED 75mA VLED(TOTAL) _ 4 CL25 3-Lead TO-92 Package Outline (N3) 0.135 MIN 0.125 - 0.165 0.080 - 0.105 1 2 3 Top View 0.175 - 0.205 0.170 - 0.210 1 2 3 Seating Plane 0.500 MIN 0.014 - 0.022 0.014 - 0.022 0.045 - 0.055 0.095 - 0.105 Side View Front 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 1.50 ± 0.10 0.40 ± 0.05 Exclusion Zone No Vias/Traces in this area. Shape of pad may vary. 4.10 ± 0.15 2.21 ± 0.08 2.45 ± 0.15 1.05 ± 0.15 0.5 ± 0.06 0.42 ± 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