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PDF STLD41 Data sheet ( Hoja de datos )
| Número de pieza | STLD41 | |
| Descripción | White LED driver | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de STLD41 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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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
19
1 page  
STLD41
3 Maximum ratings
Maximum ratings
Table 3. Absolute maximum ratings
Symbol
Parameter
Value
Unit
VIN Signal supply voltage
- 0.3 to 23
V
VLX Inductor connection
- 0.3 to 40
V
FB Feedback connection
- 0.3 to 2
V
EN Logic pin
- 0.3 to 21
V
PWM_IN
PWM input
- 0.3 to 6
V
ESD
Human body model
± 2 kV
PTOT
Continuous power dissipation (at TA = 70 °C) (1)
TBD
mW
TOP Operating ambient temperature range
- 40 to 85
°C
TJ Junction temperature
- 40 to 150
°C
TSTG
Storage temperature range
- 65 to 150
°C
1. Power dissipation is dependent on the PCB. PCB design recommendations are included in Section 7.5: PCB layout.
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
Table 4. Thermal data
Symbol
Parameter
RthJA
Thermal resistance junction-ambient
Value
46
Unit
°C/W
Doc ID 022283 Rev 5
5/19
5 Page 
STLD41
Figure 4. Top layer
Selection of external components
Figure 5. Bottom layer
Doc ID 022283 Rev 5
11/19
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet STLD41.PDF ] | |
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