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PDF TLD1121EL Data sheet ( Hoja de datos )
| Número de pieza | TLD1121EL | |
| Descripción | Basic LED Driver | |
| Fabricantes | Infineon | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TLD1121EL (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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Infineon® Basic LED Driver
TLD1121EL
1 Channel High Side Current Source
Data Sheet
Rev. 1.0, 2013-08-08
Automotive
Free Datasheet http://www.datasheet4u.com/
1 page  
2 Block Diagram
VS
Internal
supply
EN
Thermal
protection
Output
control
OUT
IN_SET Current
adjust
TLD1121EL
Status
ST GNDS
GND
Figure 1 Basic Block Diagram
TLD1121EL
Block Diagram
Data Sheet
5 Rev. 1.0, 2013-08-08
Free Datasheet http://www.datasheet4u.com/
5 Page 
TLD1121EL
EN Pin
5.2 Internal Supply Pin
The EN pin can be used to supply the internal logic. There are two typical application conditions, where this feature
can be used:
1) In “DC/DC control Buck” configurations, where the voltage Vs can be below 5.5V.
2) In configurations, where a PWM signal is applied at the Vbatt pin of a light module. The buffer capacitor CBUF is
used to supply the Basic LED Driver IC during Vbatt low (Vs low) periods. This feature can be used to minimize
the turn-on time to the values specified in Pos. 9.2.13. Otherwise, the power-on reset delay time tPOR (Pos. 5.4.7)
has to be considered.
The capacitor can be calculated using the following formula:
CBUF = tLOW(max) ⋅ V-----S----–-----V---I--DE---1N----–(--L---VS---)-S---(--P---O----R---)
See also a typical application drawing in Chapter 10.
(1)
VBATT
D1
CBUF
VS
Internal
supply
EN
Thermal
protection
Output
control
OUT
RSET
IN_SET Current
adjust
Basic LED Driver
GND
GND
Figure 5 External circuit when applying a fast PWM signal on VBATT
Data Sheet
11
Rev. 1.0, 2013-08-08
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TLD1121EL.PDF ] | |
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