LT3598

• Product introduction

The LT3598 6 string 30mA LED driver with 1.5% current matching accuracy

peculiarity

• True Color PWM^TMDimming provides a dimming ratio of up to 3000:1
• Capable of driving 6 strings of LEDs at up to 30mA
• ± 1.5% LED current matching accuracy
• Wide input voltage range: 3.2V to 30V
• Output voltage up to 44V
• Even in V_IN> V_OUTThe current can also be adjusted under conditions
• The LED is disconnected in shutdown mode
• Programmable Open LED Protection (Adjusted)
• OPENLEDAlarm pin
• Programmable LED temperature derating
• Adjustable frequency: 200kHz to 2.5MHz
• Can be synchronized to an external clock
• Channels can be paralleled to deliver higher current to each LED string
• Thermally enhanced 4mm × 4mm QFN package and 24-lead TSSOP package
• LT^®The 3598 is a fixed frequency, step-up DC/DC converter designed to drive up to six strings of LEDs with an output voltage up to 44V. The LED dimming function can be implemented using analog dimming circuitry on the CTRL pin and pulse-width modulation dimming circuitry on the PWM pin. The LT3598 accurately regulates LED current, even when the input voltage is higher than the LED output voltage. The switching frequency can be programmed with an external resistor and can be adjusted from 200kHz to 2.5MHz.

• Other features include programmable overvoltage protection, switching frequency synchronization to an external clock, LED current derating based on junction temperature and/or LED temperature, LED string disable control,OPENLEDThe alarm pin, as well as all LED strings, are limited by the output voltage when they are disconnected. The LT3598 is available in thermally enhanced 24-lead (4mm × 4mm) QFN packages and 24-lead TSSOP packages

• apply

  • Laptop monitor
  • Medium size monitor
  • Automotive LCD display