LT3598IFE#PBF

LT3598 is a fixed frequency step-up DC/DC converter designed to drive upto six strings of LEDs at an output voltage upto 44V. LED dimming can be achieved with analog dimming on the CTRL pin, and with pulse width modulation dimming on the PWM pin. This device accurately regulates LED current even when the input voltage is higher than the LED output voltage. The switching frequency is programmable from 200KHz to 2.5MHz through an external resistor. It is widely used in application such as notebook computer display, medium size displays, automotive LCD display etc.

• True Colour PWM™ dimming delivers upto 3000:1 dimming ratio
• Drives six strings of LEDs at upto 30mA
• ±1.5% accurate LED current matching
• Wide input voltage range is 3.2V to 30V
• Regulates current even when VIN <gt/> VOUT
• Disconnects LEDs in shutdown
• OPENLED alert pin, programmable LED current derating
• Synchronizable to an external clock
• Parallel channels for higher current per LED string
• Operating temperature is -40°C to 125°C, packaging style is 24-lead plastic TSSOP

บันทึก

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