TLD1314EL_15 Datasheet, PDF (26/29 Pages) Marl International Limited – Basic LED Driver

TLD1314EL
Application Information
10
Application Information
Note: The following information is given as a hint for the implementation of the device only and shall not be
regarded as a description or warranty of a certain functionality, condition or quality of the device.
Vbat
BCM
channel 1
IN1
I S1
SEN
int ernal
power
supply
ESD
protec tion
logic
load current
s ens e
gate control
&
charge pump
open load
det ect ion
t em perat ure
sensor
PROFET
clamp for
inductive load
multi step
load current
lim it at ion
VBB
OUT1
channel 2
IN2
I S2
control and protection circuit
equivalent to
channel 1
R G ND
GND
OUT2
VBATT
Cmo d =2.2µF
IS O-P u lse
protection circuit
depending on
re q u i re m e n ts
VS
CVS =4.7nF
Internal
supply
DEN _Diagnosis
enable
Thermal
protection
Output
control
RSET
IN_SET Current
adjust
Basic LED Driver
Status
ST
OUT3
OUT2
OUT1
4.7nF** 4.7nF** 4.7nF**
GND
GND
470 kΩ*
C ST=100pF**
* In case PWM via VS or EN is performe.d
** For EMI improvement, if required.
VS
C VS=4.7nF
Internal
supply
DEN _Diagnosis
enable
Thermal
protection
Output
control
RSET
IN_SET Current
adjust
Basic LED Driver
Status
ST
OUT3
OUT2
OUT1
4.7nF** 4.7nF** 4.7nF**
GND
CST=100pF**
VS
CVS =4.7nF
DEN
Internal
supply
Diagnosis
enable
Thermal
protection
Output
control
RSET
IN_SET Current
adjust
Basic LED Driver
Status
ST
OUT3
OUT2
OUT1
4.7nF** 4.7nF** 4.7nF**
VZD>VOUT( CC)
GND
R<50Ω
C ST=1 0 0p F**
Figure 19 System Diagram TLD1314EL in combination with mutiple devices and two channel usage for
device at the right side
Note: This is a very simplified example of an application circuit. In case of high ISO-pulse requirements a reverse
protection diode may be used for LED protection. The function must be verified in the real application.
10.1
Further Application Information
• For further information you may contact http://www.infineon.com/
Data Sheet
26
Rev. 1.0, 2013-08-08