STLD41 Datasheet, PDF (1/19 Pages) STMicroelectronics – White LED driver for mid-size LCD display backlight

STLD41
White LED driver for mid-size LCD display backlight
Datasheet − production data
Features
■ Boost DC-DC converter
■ Drives up to 40 LEDs (4 strings of 10) with a
total current up to 120 mA
■ Input voltage range: 3.0 V to 21 V
■ Output current control
■ 1.4 MHz fixed frequency PWM control
■ PWM input for output current dimming with
frequency range 25 kHz - 50 kHz
■ 2 A integrated switch
■ Overvoltage protection
■ Chip overtemperature detection and protection
■ Less than 1 µA standby current
■ Soft-start function
■ Package DFN8 (3 x 3) 0.65 mm pitch
DFN8 (3 x 3 mm)
signal connected to the EN pin. The LEDs can be
dimmed by applying a PWM signal to the PWM
pin.
Applications
■ Mini PCs
■ PMP & PND
■ Printers
■ Game consoles
Description
The STLD41 is a boost converter that operates
from 3.0 V to 21 V and can provide an output
voltage as high as 38 V. It can drive up to 40 white
LEDs connected in 4 strings of 10 LEDs in series.
The total output current capability is 120 mA at an
output voltage of 38 V. Regulation is performed by
the internal error amplifier which works with the
feedback voltage from the sensing resistor. The
device can be turned ON/OFF by way of the logic
Table 1. Device summary
Order code
Package
STLD41PUR
DFN8 (3 x 3 mm)
Packaging
3000 parts per reel
June 2012
This is information on a product in full production.
Doc ID 022283 Rev 5
1/19
www.st.com
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