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LT3595 Datasheet(PDF) 6 Page - Linear Technology |
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LT3595 Datasheet(HTML) 6 Page - Linear Technology |
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6 / 16 page  LT3595 6 3595f PIN FUNCTIONS L1-16 (Pins 1, 3, 7, 9, 10, 12, 16, 18, 29, 31, 35, 37, 38, 40, 44, 46): LED Pins. Connection point for the anode of the highest LED in each string. SW1-16 (Pins 2, 4, 6, 8, 11, 13, 15, 17, 30, 32, 34, 36, 39, 41, 43, 45): Switch Pins. Minimize trace area at these pins to minimize EMI. Connect the inductors to these pins. VIN (Pins 5, 14): 4.5V to 45V Input Supply Pin. Must be locally bypassed. Both VIN pins must be tied together. PWM1-16 (Pins 19-22, 25-28, 47-50, 53-56): Input Pin for LED Dimming Function. The rising edge of each channel must be synchronized. ⎯O⎯P⎯E⎯N⎯L⎯E⎯D (Pin 23): Open Collector Output for Reporting Faults. If any channel experiences an open LED connec- tion, the ⎯O⎯P⎯E⎯N⎯L⎯E⎯D pin is pulled low. ⎯S⎯H⎯D⎯N (Pin 24): Shutdown. Tie to 1.6V or greater to enable the device. Tie below 0.4V to turn off the device. NC (Pins 33, 42): No Connect. Connect these pins to ground. RSET (Pin 51): External Resistor to Set the Master LED Current. The LED current is equal to: I V R LED SET = 121 1240 . • where RSET is the value of the external resistor. Use a kelvin for ground metal. VCC (Pin 52): 3.3V Input Supply. Must be locally by- passed. Exposed Pad (Pin 57): Ground. The Exposed Pad must be soldered to PCB. Use wide metal from backtab to the grounds of the input capacitors on VCC and VIN. |
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