Infineon TLD2252-2EP User Manual
User Manual Please read the Important Notice and Warnings at the end of this document Rev.1.00
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Z8F80036493
TLD2252-2EP rear combination lamp evaluation
board
User Manual
About this document
Scope and purpose
The purpose of the TLD2252-2EP rear combination lamp evaluation board (TLD2252-2_RCL_EVAL) board is to
help designers evaluate the features and the performance of the TLD2252-2EP, a two-channel linear current
source LED driver for automotive LED lighting applications. TLD2252-2EP provides a simple and compact
solution for the implementation of a rear combination lamp (RCL).
This user manual provides the usage instructions of the TLD2252-2 _RCL_ EVAL board (schematic version S00,
PCB version P00).
Figure 1 TLD2252-2_RCL_EVAL board
Intended audience
Hardware engineers, system architects.
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TLD2252-2EP rear combination lamp evaluation board
User Manual
TLD2252-2_RCL_EVAL description
Related information
Table 1 Supplementary links and document references
Reference
Description
LITIX™ Basic+ TLD2252-2EP
product home page
Product website which contains reference information for the LITIX™ Basic+
TLD2252-2EP including datasheet, application notes, simulation models,
boards and relevant training
LITIX™ Basic+ family website
All information about LITIX™ Basic+ family products
LITIX™ Basic+ LED driver
family: How to implement a
rear combination lamp
Application note regarding the main operating principles of the pulse width
modulation (PWM) engine integrated into the LITIX™ Basic+ TLD2252-2EP,
TLD2141-3EP and TLD2142-1EP, and how to build a rear combination lamp
(RCL) using PWM
LITIX™ Basic+ LED driver
family: Diagnosis and fault
management
Application note regarding the main operating principles of the diagnosis
and fault management features integrated in the LITIX™ Basic+ family.
LITIX™ Basic+ Boards
Available evaluation boards for LITIX™ Basic+
LED rear lighting - application
page
Application website for rear LED lighting
Table of contents
About this document ......................................................................................................................... 1
Table of contents .............................................................................................................................. 2
1 TLD2252-2_RCL_EVAL description .............................................................................................. 3
1.1 Key features ............................................................................................................................................. 3
1.2 Connectors and jumpers ......................................................................................................................... 4
1.3 On-board load ......................................................................................................................................... 5
1.4 Test points ............................................................................................................................................... 6
2 Quick start ............................................................................................................................... 7
3 Schematics, layout and bill of material ...................................................................................... 8
3.1 Schematics .............................................................................................................................................. 8
3.2 Layout .................................................................................................................................................... 10
3.3 Bill of materials ...................................................................................................................................... 11
3.4 PCB design data .................................................................................................................................... 12
Revision history ...............................................................................................................................13
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TLD2252-2EP rear combination lamp evaluation board
User Manual
TLD2252-2_RCL_EVAL description
1 TLD2252-2_RCL_EVAL description
The TLD2252-2_RCL_EVAL is an evaluation board equipped with one LITIX™ Basic+ TLD2252-2EP and on-board
LEDs for easy evaluation of an RCL application when realized with use of the TLD2252-2EP pulse width
modulation (PWM) engine.
The board can be used within the typical automotive voltage range, 8 V to 16 V. It gives the user the freedom to
evaluate all of the TLD2252-2EP features and possible configurations by setting the necessary jumpers
accordingly.
As the PWM-engine of LITIX™ Basic+ TLD2252-2EP can be used to drive other LITIX™ Basic+ devices, the
TLD2252-2_RCL_EVAL board can be used in combination with the BASICPLUS_DEMOBOARD for combined
family evaluation.
Figure 2 Rear combination lamp implemented with LITIX™ Basic+ TLD2252-2EP
1.1 Key features
The TLD2252-2_RCL_EVAL has the following features:
1. Equipped with one LITIX™ Basic+ TLD2252-2EP
2. Typical supply voltage range 8 V to 16 V
3. Equipped with jumpers for evaluation of the features in different configurations (e.g. PWM-engine)
4. On-board LED load, 3 LEDs per output channel
5. Possibility to connect external load
6. Possibility to drive other LITIX™ Basic+ devices with PWM-signal, in combination with
BASICPLUS_DEMOBOARD
7. 11.4 cm x 4.2 cm 2-layer PCB
OUT1
OUT2
TLD2252-2EP
VS
D
EN/DEN1
ERRN
IN_SET1
C
VS
*
C
D
R
SET1
R
EN/DEN2
V
STOP
R
EN/DEN1
R
ERRN
* For EMI improvement,
if required (e.g. 4,7 or 10nF)
PWMO
PWM_SET
GND
R
PWM_SET
R
PWM_RST
PWM_RST
PWMI
C
PWMI
V
TAIL
EN/DEN2
IN_SET2
Supply
Protection
R
SET2
R
EN/DEN2_2
R
EN/DEN1_2
C
OUT
*
C
OUT
*
R
PWMO
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TLD2252-2EP rear combination lamp evaluation board
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TLD2252-2_RCL_EVAL description
1.2 Connectors and jumpers
The TLD2252-2_RCL_EVAL board connectors are described in Table 2.
Table 2 TLD2252-2_RCL_EVAL connectors
Connector
Description
INPUT
VS_STOP
Power supply, typical 8 V to 16 V, and deactivation of the internal PWM engine of the
LITIX™ Basic+ TLD2252-2EP
VS_TAIL
Power supply, typical 8 V to 16 V, and activation of the internal PWM engine of the
LITIX™ Basic+ TLD2252-2EP
GND
Ground
OUTPUT
GND
Ground
PWMO
LITIX™ Basic+ TLD2252-2EP PWM signal to drive other LITIX™ Basic devices
OUT1
External load for output channel 1, OUT1
OUT2
External load for output channel 2, OUT2
The TLD2252-2_RCL_EVAL board jumpers are described in Table 3.
Table 3 TLD2252-2_RCL_EVAL board jumpers
Jumper
Description and configuration
JPN_SET1
Sets the output current of OUT1:
• RIN_SET1_1 (36.5 kΩ): sets the output current to 10 mA
• RIN_SET1_2 (7.32 kΩ): sets the output current to 50 mA
JPPWMO
PWM output enable:
• IN_SET1: enables PWM at OUT1
• IN_SET2: enables PWM at OUT2
JPN_SET2
Sets the output current of OUT2:
• RIN_SET2_1 (14.7 kΩ): sets the output current to 50 mA
• RIN_SET2_2 (7.32 kΩ): sets the output current to 100 mA
JPEN2/DEN2
Activate the device and diagnosis for OUT2:
• EN1/DEN1: use the resistor divider on EN1/DEN1 (REN1/DEN1_1) to activate OUT2
• EN2/DEN2: use separate resistor divider EN1/DEN1 (REN1/DEN1_1) to activate
OUT2. During tail function (board supplied via VS_TAIL), place jumper on
EN1/DEN1 position
JPOUT
On board load connection
• OUT1: connects OUT1 to on-board load
• OUT2: connects OUT2 to on-board load
JPD
Diagnosis management
• GND: when a fault is detected only the channel under fault condition will be
deactivated. The error will be communicated via ERRN
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TLD2252-2EP rear combination lamp evaluation board
User Manual
TLD2252-2_RCL_EVAL description
Jumper
Description and configuration
• Open: when a fault is detected both channels will switch off
• CD: when a fault is detected both channels will switch off after a delay time t
D(set)
.
Delay time is set by CD capacitor
JPPWMI
PWMI connection
• CPWMI1 (120 nF): sets the PWM frequency to 220 Hz and duty cycle 10%
• CPWMI2 (68 nF): sets the PWM frequency to 400 Hz and duty cycle 10%
• GND: duty cycle is 100%
The duty cycle is set by the RPWM_SET (4.53 kΩ) and RPWM_RST (41.2 kΩ) resistors
JPOUT
On board load connection
• OUT1: connects OUT1 to on-board load. Leave open to connect to external load
• OUT2: connects OUT2 to on-board load. Leave open to connect to external load
1.3 On-board load
The TLD2252-2_RCL_EVAL board is equipped with on-board LED load (on the bottom side) for easy evaluation.
Figure 3 On-board LED load
The on-board LED load shown in Figure 3 is described in Table 4.
Table 4 On-board LED load
Load
Description
LED OUTPUT
Load 1
3 x 1 LEDs in series; used when OUT1 of JPOUT is bypassed
Load 2
3 x 1 LEDs in series; used when OUT2 of JPOUT is bypassed
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