stld41pur STMicroelectronics, stld41pur Datasheet - Page 8

• Manufacturer Part Number: stld41pur
• Description: White Led Driver For Mid-size Lcd Display Backlight
• Manufacturer: STMicroelectronics

Introduction
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Introduction
The STLD41 is a boost converter, dedicated to power and control the current of white LEDs
in an LCD backlight. The device operates at a typical constant switching frequency of 1.4
MHz. It steps an input voltage ranging from 3.0 V to 21 V up to 40 V. The output current is
dimmable by the PWM signal applied to the PWM pin.
PWM input
The light intensity can be dimmed by a signal applied to the PWM input. It is recommended
to use a signal whose frequency is between 25 kHz to 50 kHz. The maximum amplitude of
the signal is limited to 5.5 V. The minimum level of the signal must be at least 1.4 V. The
dimming range is from 20% to 100% of the current set by the R
Doc ID 022283 Rev 2
SENSE
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STLD41