RSET NC LED4 EN/PWM LED3 SW LED2 FB CAT4106 LED Driver, 4-Channel, 6 Watt with Diagnostics Description The CAT4106 is an integrated multichannel LED driver and high power DC/DC converter suitable for powering backlighting CAT4106 L D V L C2 C3 47 H 3 V to 24 V 10 F/ 4.7 F R4 R6 50 V V IN SW VIN VFMAX C1 3 V to 5.5 V VFMIN R5 1 F R7 CAT4106 OFF... ON... DIM EN/PWM LED1 LED2 RSET LED3 20 k R2 LED4 CTRL V IN FAULT FB GND PGND R8 R3 LED Fault Detection R1 20 k (open drain pulldown) Figure 1. Typical Application Circuit Table 1. ABSOLUTE MAXIMUM RATINGS Parameters Ratings Units VIN, RSET, EN/PWM, CTRL, FB, FAULT 0.3 V to 6 V VFMIN, VFMAX 0.3 V to 6 V LED1, LED2, LED3, LED4 0.3 V to 25 V SW (internally clamped to 40 V) 50 V Storage Temperature Range 65 to +150 C Junction Temperature Range 40 to +150 C Lead Temperature 300 C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Table 2. RECOMMENDED OPERATING CONDITIONS Parameter Range Units VIN 3.0 to 5.5 V Inductor Drive Voltage 3.0 to 24 V LED String Forward Voltage per channel up to 36 V Ambient Temperature Range 40 to +85 C I per LED pin 10 to 175 mA LED Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. 3. Typical application circuit with external components is shown above. Table 3. RECOMMENDED EN/PWM TIMING (For 3.0 VIN 5.5 V, over full ambient temperature range 40 to +85C.) Symbol Name Conditions Min Typ Max Units T LED setup time from shutdown 10 40 100 s LEDSETUP T EN/PWM low time 0.2 2000 s LO T EN/PWM high time 100 s HI T EN/PWM low time to shutdown delay 8 ms PWRDWN T LED current settling time I = 100 mA 0.2 s LEDSET LED