CAT4026 LED Controller, 6-Channel, with Fault Diagnostics Description The CAT4026 is a high performance, large panel LED controller designed to control six constant current high voltage LED strings. CAT4026 LEDLLC VOUT 10 k BAS21LT1 1.8 V output (user option) Current X6 Diodes Feedback LLC Circuit Feedback 5 V HISENSE C1 1 nF 6 Channel Cathode Bus ZvSCA Voltage Feedback LOSENSE Option 6 Channel Cathode Bus 5 V VC IFB OCA C1 C3 VA SCA VCS VDD X6 Diodes BAS21LT1 SHORT FLTSCA FLTOCA OPEN CAT4026 BASE 1:6 Q1 Q6 6 PWM PWM 6 Channels ANLG ANLG RSET 1:6 6 GND R1 R6 Notes: Q1 to Q6 NPN power transistor MJD340 from ON Semiconductor. External powerderating circuit not shown. Figure 1. Typical Application Circuit Table 1. ABSOLUTE MAXIMUM RATINGS Rating Symbol Value Unit VDD Voltage Range V 0.3 to 7 V in PWM, ANLG, FLTOCA, FLTSCA Voltage Range PWM 0.3 to 7 V or (V + 0.3), V in whichever is lower RSET x , BASE x 0.3 to 7 V or (V + 0.3), V in whichever is lower Maximum Junction Temperature T 150 C J(max) Storage Temperature Range T 65 to 150 C STG Lead Temperature Soldering T 260 C SLD Reflow (SMD Styles Only), PbFree Versions (Note 3) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 2. This device series incorporates ESD protection and is tested by the following methods: ESD Human Body Model tested per AEC Q100002 (EIA/JESD22A114) ESD Machine Model tested per AECQ100003 (EIA/JESD22A115) This device meets latchup tests defined by JEDEC Standard JESD78. 3. For information, please refer to our Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. Table 2. THERMAL CHARACTERISTICS Rating Symbol Value Unit Thermal Characteristics, SOIC28 C/W Thermal Resistance, JunctiontoAir (Note 4) R 79 JA Thermal Resistance, JunctiontoCase (Note 4) 23 R JC 2 2 4. Values based on copper area of 645 mm (or 1 in ) of 1 oz copper thickness and FR4 PCB substrate. Table 3. OPERATING RANGES Rating Symbol Min Max Rating Input Voltage V 4.5 5.5 V in Ambient Temperature T 40 85 C A