CL25

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) Can be paralleled for higher current 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. Applications ► LED channel lighting ► Industrial lamp indicators ► Accent lighting Typical Application Circuit VA Functional Circuit Diagram VA CL25 Up to 90V + VLED(total) VB Control Circuit and Temperature Compensation + ILED 25mA VLED(total) VB - CL25 Ordering Information Device CL25 Package Options TO-92 CL25N3-G TO-243AA (SOT-89) CL25N8-G -G indicates package is RoHS compliant (‘Green’) Thermal Characteristics Package TO-92 TO-243AA (SOT-89) Power Dissipation @TA = 25OC 0.6W 1.3W* O Pin Configuration θJC C/W O θJA C/W VB 125 15 170 78* * Mounted on FR4 board; 25mm x 25mm x 1.57mm Absolute Maximum Ratings Parameter Operating voltage, VA-B Operating junction temperature, TJ Storage temperature, TS Value 100V -40°C to +125°C -55°C to +150°C VA NC VB (front view) VA VB NC TO-92 TO-243AA (top 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 VA-B IA-B ΔIA-B/ΔT TJ RA-B Parameter 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 V mA %/ C O O Conditions --VA-B = 5V - 90V VA-B = 45V, TJ = -40OC to +100OC ----- C Ω Functional Circuit Diagram VA Equivalent Block Diagram VA Control Circuit and Temperature Compensation 25mA ±10% VB VB 2 CL25 Temperature Characteristics 1.02 Current, normalized to 25°C 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 25 20 15 10 5 0 I A-B (mA) 0 10 20 30 40 50 60 70 80 90 100 VA-B 3 CL25 CL25 for Multiple LED Strings VA VA VA VA Up to 90V +VLED(TOTAL) CL25 ILED 25mA VB CL25 ILED 25mA VB CL25 ILED 25mA VB CL25 ILED 25mA VB + 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 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 - 0.210 123 Seating Plane 0.500 MIN 0.014 - 0.022 0.014 - 0.022 0.045 - 0.055 0.095 - 0.105 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 Exclusion Zone 1.50 ± 0.10 4.10 ± 0.15 2.45 ± 0.15 2.21 ± 0.08 No Vias/Traces in this area. Shape of pad may vary. 1.05 ± 0.15 0.42 ± 0.06 1.50 BSC 3.00 BSC 0.5 ± 0.06 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