Infineon LITIX TLD6098-2ES User manual

User guide
Please read the sections “Important notice” and “Warnings” at the end of this document
Revision 1.00
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2022-12-22
Z8F80411563
TLD6098-2DPVB2G_EVAL board
User guide
LITIX™ Power
Multitopology DC-DC controller
About this document
The TLD6098-2ES device used in this evaluation board, is an AEC qualified dual channel DC-DC controller,
especially designed to be used as voltage regulator such as power supply or current regulator such as an LED
driver. Its main features are:
•Wide input voltage up to 58 V and output voltage range up to 70 V
•EMC optimized device
•Overvoltage, short to ground, overcurrent, open feedback and overtemperature diagnostic output
•Configurable control as constant voltage or constant current
Scope and purpose
The scope of this user guide is to provide instructions on the use of TLD6098-2ES Power dual phase
boosttoground TLD6098-2DPVB2G_EVAL board.
Intended audience
This document is intended for engineers who perform measurements and check performances with
TLD60982EP Power dual phase boost to ground TLD6098-2DPVB2G_EVAL board.
Evaluation Board
This TLD6098-2DPVB2G_EVAL board is to be used during the design-in process for evaluating and measuring
multiphase topology with TLD6098-2ES.
Note: PCB and auxiliary circuits are NOT optimized for final customer design.

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Important notice
Important notice
“Evaluation Boards and Reference Boards” shall mean products embedded on a printed circuit board
(PCB) for demonstration and/or evaluation purposes, which include, without limitation, demonstration,
reference and evaluation boards, kits and design (collectively referred to as “Reference Board”).
Environmental conditions have been considered in the design of the Evaluation Boards and Reference
Boards provided by Infineon Technologies. The design of the Evaluation Boards and Reference Boards
has been tested by Infineon Technologies only as described in this document. The design is not qualified
in terms of safety requirements, manufacturing and operation over the entire operating temperature
range or lifetime.
The Evaluation Boards and Reference Boards provided by Infineon Technologies are subject to functional
testing only under typical load conditions. Evaluation Boards and Reference Boards are not subject to the
same procedures as regular products regarding returned material analysis (RMA), process change
notification (PCN) and product discontinuation (PD).
Evaluation Boards and Reference Boards are not commercialized products, and are solely intended for
evaluation and testing purposes. In particular, they shall not be used for reliability testing or production.
The Evaluation Boards and Reference Boards may therefore not comply with CE or similar standards
(including but not limited to the EMC Directive 2004/EC/108 and the EMC Act) and may not fulfill other
requirements of the country in which they are operated by the customer. The customer shall ensure that
all Evaluation Boards and Reference Boards will be handled in a way which is compliant with the relevant
requirements and standards of the country in which they are operated.
The Evaluation Boards and Reference Boards as well as the information provided in this document are
addressed only to qualified and skilled technical staff, for laboratory usage, and shall be used and
managed according to the terms and conditions set forth in this document and in other related
documentation supplied with the respective Evaluation Board or Reference Board.
It is the responsibility of the customer’s technical departments to evaluate the suitability of the
Evaluation Boards and Reference Boards for the intended application, and to evaluate the completeness
and correctness of the information provided in this document with respect to such application.
The customer is obliged to ensure that the use of the Evaluation Boards and Reference Boards does not
cause any harm to persons or third party property.
The Evaluation Boards and Reference Boards and any information in this document is provided "as is"
and Infineon Technologies disclaims any warranties, express or implied, including but not limited to
warranties of non-infringement of third party rights and implied warranties of fitness for any purpose, or
for merchantability.
Infineon Technologies shall not be responsible for any damages resulting from the use of the Evaluation
Boards and Reference Boards and/or from any information provided in this document. The customer is
obliged to defend, indemnify and hold Infineon Technologies harmless from and against any claims or
damages arising out of or resulting from any use thereof.
Infineon Technologies reserves the right to modify this document and/or any information provided
herein at any time without further notice.

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Safety precautions
Safety precautions
Note: Please note the following warnings regarding the hazards associated with development systems.
Table 1 Safety precautions
Warning: The evaluation or reference board contains DC bus capacitors which take
time to discharge after removal of the main supply. Before working on the drive
system, wait five minutes for capacitors to discharge to safe voltage levels. Failure to
do so may result in personal injury or death. Darkened display LEDs are not an
indication that capacitors have discharged to safe voltage levels.
Warning: Remove or disconnect power from the drive before you disconnect or
reconnect wires, or perform maintenance work. Wait five minutes after removing
power to discharge the bus capacitors. Do not attempt to service the drive until the bus
capacitors have discharged to zero. Failure to do so may result in personal injury or
death.
Caution: The heat sink and device surfaces of the evaluation or reference board may
become hot during testing. Hence, necessary precautions are required while handling
the board. Failure to comply may cause injury.
Caution: Only personnel familiar with the drive, power electronics and associated
machinery should plan, install, commission and subsequently service the system.
Failure to comply may result in personal injury and/or equipment damage.
Caution: The evaluation or reference board contains parts and assemblies sensitive to
electrostatic discharge (ESD). Electrostatic control precautions are required when
installing, testing, servicing or repairing the assembly. Component damage may result
if ESD control procedures are not followed. If you are not familiar with electrostatic
control procedures, refer to the applicable ESD protection handbooks and guidelines.
Caution: A drive that is incorrectly applied or installed can lead to component damage
or reduction in product lifetime. Wiring or application errors such as undersizing the
motor, supplying an incorrect or inadequate AC supply, or excessive ambient
temperatures may result in system malfunction.
Caution: The evaluation or reference board is shipped with packing materials that
need to be removed prior to installation. Failure to remove all packing materials that
are unnecessary for system installation may result in overheating or abnormal
operating conditions.

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Table of contents
Table of contents
About this document....................................................................................................................... 1
Important notice ............................................................................................................................ 2
Safety precautions.......................................................................................................................... 3
Table of contents............................................................................................................................ 4
1The board at a glance.............................................................................................................. 5
1.1 Main features...........................................................................................................................................6
1.2 Board parameters and technical data....................................................................................................6
2System and functional description........................................................................................... 7
2.1 Input connection.....................................................................................................................................8
2.2 Output current regulation.......................................................................................................................8
2.3 Output voltage regulation ....................................................................................................................10
2.4 Faults detection.....................................................................................................................................10
2.5 Current derating....................................................................................................................................12
3System design ......................................................................................................................13
3.1 Schematics ............................................................................................................................................13
3.2 PCB layout .............................................................................................................................................15
3.3 Bill of material .......................................................................................................................................17
3.4 Electrical performance..........................................................................................................................19
3.5 Efficiency measurements......................................................................................................................20
3.6 Thermal performances..........................................................................................................................21
References............................................................................................... Error! Bookmark not defined.
Revision history.............................................................................................................................23
Disclaimer.....................................................................................................................................24

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The board at a glance
1The board at a glance
The TLD6098-2DPVB2G_EVAL dual phase boost-to-ground evaluation board is a switching power supply that,
under nominal conditions, can deliver a constant voltage at the output between 43 V and 52 V and a current up
to 7 A.
This power-supply can be set in constant voltage and in constant current: the output will maintain the desired
voltage until the current sourced is higher than the threshold set. At this point it starts to regulate by keeping
the current constant.
If compared to a similar power supply with only one channel; thanks to the phase shift applied between the
switching signal of channels, ripple on input and output is reduced and so the frequency can be lowered,
decreasing the commutation losses and thereby efficiency is maximized.
The power-supply is equipped with an output overvoltage protection.
Both channels are constantly monitored by the built-in diagnosis features of the TLD6098-2ES. Two LEDs are
provided to signal any possible fault.
Attention: This board requires protection against short circuits on input. A 50 A automotive fast blade
fuse can provide protection or by setting the maximum current of the external power supply
which is used to power the board to 50 A.
Attention: Please be aware that it is up to the user to provide protection
and that the 50 A fast blade fuse is not included in this kit or on the board
Figure 1 TLD6098-2DPVB2G_EVAL board

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The board at a glance
Figure 2 Simplified schematic
1.1 Main features
•Ripple on input and output is reduced
•Phase shift applied between the switching signal of channels
•Frequency can be lowered which decreases the commutation losses
1.2 Board parameters and technical data
Table 2 Performance summary
Parameter
Conditions
Value
Input supply voltage
–
8 to 27 V
Output voltage range
–
43 to 52 V
Continuous output current
Voltage on pin VSET1 ≥ 2.2 V
VBATT ≥ 14 V
Output current derating for VBATT < 14 V (see
Chapter 2.5)
TA ≤ 25°C
7 A
Peak output current
Less than 2 s
10 A (limited by RI-SENSE)
Switching frequency
Set by RFREQ = 4.53 kΩ
200 kHz
Efficiency
VBATT = 14 V, VOUT = 48 V, IOUT = 7 A
> 94%
Output overvoltage protection
Set by RVFBH-2 = 68 kΩ and RVFBL-2 = 1.8 kΩ
62 V
Maximum ambient temperature
–
35°C

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System and functional description
2System and functional description
The power supply is composed of two DC-DC channels that work in parallel. Channel 1 leads the output
voltage, channel 2 follows channel 1. Channel 1 works as a constant voltage source, whereas channel 2 works
as a current source. The behavior of each channel depends on the resistor values used to tie to ground the pins
FPWM/FAULT1 and FPWM/FAULT2 (resistors RFLT1 and RFLT2 on simplified schematics and refers to TLD6098-2ES
datasheet [2] for more information).
Channel 1 senses the output voltage with pin VFB1 through the potentiometer RVFB1 and regulates the duty-
cycle of its power MOSFET to keep on VFB1 the voltage loop reference VVFB1_REF at 1.6 V. The voltage loop on
channel 1 is enabled when the voltage on VFB1is higher than 1.5 V and disabled when it is lower than 1.35 V.
The sourced current is measured through the sensing pins FBH1 and FBL1 across the shunt resistor RI-SENSE.
When the drop voltage on RI-SENSE goes above the current loop reference VREF1 (typically 150 mV when the voltage
on pin VSET1 is higher than 2.2 V), a current loop takes over the DC-DC control and limits the output current in
order to keep the drop voltage on the shunt constant. VREF1 is not fixed but it can be adjusted by varying the
voltage on pin SET1: thus, it is possible to set the desired maximum output current by means of a trimmer
connected to this pin (see Chapter Output current regulation).
Channel 2 is identical to channel 1 but it works as a constant current source. The signal used to drive MOSFET is
180° out of phase with respect to channel 1. This minimizes the current ripple at the input and output.
The most important requirement that channel 2 must fulfil, is to supply the same voltage and current of
channel 1, in order to get an almost ideal parallel of both converters. This goal is achieved by connecting the
FBL2 pin to the channel 1 output, FBH2 to the channel 2 output and by reducing the voltage on pin SET2 to
0.1 V with a voltage divider. This operation drives the channel 2 current loop reference VREF2 to zero and thus
forces channel 2 to increase or decrease its output voltage until the voltage difference between pins FBH2 and
FBL2 is zero. Since RFB1 is equal to RFB2, this equilibrium condition is reached only when the channel 2 voltage
(and thus the current) is identical to channel 1.
Looking at the compensation networks, it is clearly visible that they are different. In particular, the capacity is
higher on the channel 2 compensation network, so it means that the channel 2 response is a little bit slower
than channel 1. This is due to the different loop of the two channels and thus to a different transfer function
that characterizes both converters. Indeed, as already mentioned, if the output current is lower than the
maximum value allowed, channel 1 works as a constant voltage source, whereas channel 2 works as a current
source.
Furthermore, since channel 2 follows the channel 1, when a load is connected to the output channel 1 is ready
to supply the sudden demand of current in less time than channel 2. On pins COMP1 and COMP2 there is a
similar delay. It is possible to mitigate this effect by placing a resistor RCOMP12 between pins COMP1 and COMP2.
Indeed, after the current demand, the output voltage tends to decrease. Both channels respond by increasing
the respective COMP voltages, however channel 2 is a little bit slower due to the higher value of compensation
capacitance. A helping action in speeding up the voltage rising of COMP2 is given by the COMP1 pin and the
resistor RCOMP12, that shows a steeper response to the output load increase. RCOMP12 may cause a slight output
voltage increase when loading the output.
Diode DCOMP acts as a clamping device to avoid excessive unbalance between channels. If channel 2 duty cycle
(and therefore the energy transferred by the corresponding power stage) were to get significantly higher than
channel 1, voltage loop of channel 1 will turn the channel off. In this case, the IC could find itself stuck in an
operating point where all the current is delivered by channel 2. If the diode DCOMP is present, then as soon as
the channel 1 tends to turn off, COMP1 decreases and forces COMP2 also to decrease and consequently
decreases the activity of channel 2.

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System and functional description
2.1 Input connection
The board is equipped with a double type connector both in the input and in the output: screw terminal blocks
and 4 mm female bananas.
Attention: The screw terminal blocks have a limited current capability of up to 20 A. If the input current
is higher than 20 A or it is unknown, connect the input power supply by using female bananas
connectors. To have a rough estimation of the input current, use the following relation:
   
 󰇟󰇠
Figure 3 Input connector selection
Once the input power has been connected, if no fault is present on the circuit, the IVCC blue LED, LD3 will turn
on and if the constant voltage mode is active, the FAULT1/CV yellow LED LD1 will also turn on.
Figure 4 Constant voltage mode active
2.2 Output current regulation
This power supply behaves as a constant voltage supply if the output current is lower than a certain threshold
and it becomes a constant current source when this threshold has been overcome. It is possible to regulate this
threshold to set a maximum output current that satisfies the output needs.

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System and functional description
As already mentioned in Chapter 2.1, above, when the output current of channel 1 causes a drop voltage on the
shunt resistor RI-SENSE, higher than a certain threshold called VREF1, a current loop takes over the DC-DC control
and limits the output current in order to keep the drop voltage on the shunt to VREF1, constant.
VREF1 is not fixed but it can be adjusted by setting the voltage on pin VSET1. Thus, the maximum output current
IOUT-MAX can be set, by adjusting the voltage on pin VSET1 as described by the following relation:
    󰇛
󰇜



  
 󰇟󰇠
Where VVSET1 is the voltage on pin VSET1 [V], and RI-SENSE is the shunt resistor [Ω] of channel 1. In this schematic
VVSET1 can assume all the voltage values between 0.1 V and 2.4 V by means of trimmer RVFB1.
Assuming a RI-SENSE of 30 mΩ as in this evaluation board (R31 in the schematics), IOUT-MAX can be set to the
following values, depending on VVSET1:
Table 3 IOUT-MAX regulation
VVSET1 [V]
IOUT-MAX [A]
Notes
0 to 0.1
0
–
0.1 to 2.2
4.76 ∙ (VVSET1 –0.1)
RI-SENSE = 30 mΩ
> 2.2
10
RI-SENSE = 30 mΩ
Peak output current (less than 2 s)
To adjust VVSET1 and thus IOUT-MAX, regulate trimmer R11, highlighted in Figure 5 by measuring the voltage on test
point VSET1 and applying the above formula. By removing jumper X10, it is possible to rapidly set the maximum
output current allowable (10 A peak), as can be seen in the figure.
Figure 5 Output current regulation
Maximum current sourced from the output must be weighted on the input voltage, as described in this chapter.
A small capacitor on VSET1 can be used to slowly increase the output current during turn-on transient.

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System and functional description
2.3 Output voltage regulation
Output voltage can be set between 43 V and 52 V.
Figure 6 Output voltage regulation
Overvoltage protection is set by voltage divider RVFBH-2 = 68 kΩ and RVFBL-2 = 1.8 kΩ. If during a fault the output
voltage goes higher than 62 V, on pin VFB2 the voltage is higher 1.6 V and the switching activity is stopped until
the fault condition is removed.
FPWM/FAULT2 signals this fault with a specific squared waveform (see chapter Faults detection).
2.4 Faults detection
Depending on the resistor value connected to FPWM/FAULT1,2 pins, the controller shows different behavior
during a fault. For more information, see datasheet [2] for TLD6098-2ES.
To ease the fault detection, two LEDs have been applied on the FPWM/FAULT1,2 pins:
•Yellow LED will light up when a fault occurs on channel 1 or the voltage loop of channel 1 is enabled
•Red LED will light up when a fault occurs on channel 2
Figure 7 Fault LED indication
To understand what the fault FPWM/FAULT1,2 pins are signaling, connect two oscilloscope probes to the test
points FLT1 and FLT2, as shown in Figure 8 and refer to the waveforms in Table 4 .

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System and functional description
Figure 8 FLT1 and FLT2 test points
In this board FPWM/FAULT1,2 pins react as follows, to a fault:
Table 4 Fault detection
Fault type
FPWM/FAULT1 (Yellow LED)
FPWM/FAULT2 (Red LED)
Constant voltage out enabled
Continuous high
N.A.
Constant current out enabled
Continuous low
N.A.
Overvoltage on pin FBH1
High when VFBH1 > 75 V (Max.)
Low when VFBH1 < 65 V (Min.)
Device checks overvoltage every 10 ms
(Typ.)
N.A.
Overvoltage on pin FBH2
N.A.
tfault = 10 ms (Typ.)
tFBH = 6 ms (Typ.)
Device checks overvoltage
every 10 ms (Typ.)
Output overvoltage
or IVCC < 0.8 V
N.A.
tFAULT = 10 ms (Typ.)
tOVFB = 4 ms (Typ.)
Overcurrent: ICH1 > 10 A
TFAULT = 10 ms (Typ.)
tOC = 4 ms (Typ.)
N.A.
High voltage level on FPWM/FAULT1,2 pins is 4 V (Min.), low voltage level is 0.8 V (Typ).
The status of FPWM/FAULT1,2 pins can be also monitored by a microcontroller. In this case a series resistor of
10 kΩ minimum must be used between FPWM/FAULT1,2 and the input pin of the microcontroller.

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System and functional description
2.5 Current derating
Input current increases with the decreasing of input voltage. Thus, in order to keep components within their
safety temperature, output power must be limited, reducing the output current according to the safe operating
area (SOA) showed in the figure below.
T
A= 25°C
8 9 10 11 12 13 14 15 16 27
V
BATT [V]
4
5
6
7
8
I
OUT [A]
SOA
V
OUT V
Figure 9 Current derating

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System design
3System design
3.1 Schematics
Figure 10 Top Level
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

 

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   

User guide
14
Revision 1.00
2022-12-22
TLD6098-2DPVB2G_EVAL
User guide
System design
Figure 11 Main power schematic
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     
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   
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

    
    
  
   
       
   
   
  
  



  

User guide
15
Revision 1.00
2022-12-22
TLD6098-2DPVB2G_EVAL
User guide
System design
3.2 PCB layout
Figure 12 Top overlay
Figure 13 Internal overlay 1 (GND ground plane)

User guide
16
Revision 1.00
2022-12-22
TLD6098-2DPVB2G_EVAL
User guide
System design
Figure 14 Internal overlay 2
Figure 15 Bottom overlay

User guide
17
Revision 1.00
2022-12-22
TLD6098-2DPVB2G_EVAL
User guide
System design
3.3 Bill of material
Table 5 Bill of material
Designator
Value
Manufacturer
Manufacturer order number
C1, C2, C19, C20
470 µF
Panasonic
EEE-FK1V471AQ
C3, C8, C9, C16, C21,
C25, C26, C30
10 µF
MuRata
GRM32EC72A106KE05L
C4, C22, C28
1 µF
TDK Corporation
CGA4J3X7R1H105K125AB
C5, C6, C23
100 nF
TDK Corporation
CGA4J2X8R1H104K125AA
C7, C24
100 nF
TDK Corporation
CGA5H2X8R2A104K115AA
C10, C27
1 nF
MuRata
GCM2195G2A102JA16
C11, C18
1 µF
MuRata
GRM21BR71H105KA12L
C12, C13, C14, C15
220 µF
Panasonic
EEEFK2A221AM
C17
100 pF
AVX
08051A101FAT2A
C29
100 nF
TDK Corporation
CGA3E2X8R1E104M080AA
C31
33 nF
MuRata
GRM21BR72A333MA01
C32
100 nF
Kemet
C0805C104J5RAC
C33
4.7 µF
MuRata
GCM21BR71C475KA73
D1, D2
STPS5L60SFY
STMicroelectronics
STPS5L60SFY
D3
1SS389
Toshiba
1SS389
FLT1, FLT2, IVCC,
SWN1, SWN2, VFB1,
VFB2, VOUT, VSET1
-
Keystone Electronics Corp.
5001
IC1
Infineon Technologies
TLD6098-2ES
L1, L2
6.8 µH
Coilcraft
XAL1510-682MED
LD1
Yellow
Vishay
TLMY1000-GS08
LD2
Red
Vishay
TLMS1100-GS08
LD3
Blue
Wurth Elektronik
150060BS75000
MP1, MP2
BGA STD 050
ABL Components
BGA STD 050
MP3, MP4, MP5, MP6
-
Multicomp
MP006555
MP7, MP8, MP9, MP10
-
Wurth Elektronik
970300321
Q1, Q2
-
Infineon Technologies
IAUC120N06S5L032
Q3, Q4
-
Infineon Technologies
IRLML2030TRPbF
R1, R6
2.2 Ω
Vishay
CRCW20102R20FK
R2, R17
10 Ω
Yageo
RC0805FR-0710RL
R3, R7
68 kΩ
Vishay
CRCW080568K0FK
R4, R11
20 kΩ
Bourns
3266Y-1-203LF
R5
2.7 kΩ
Vishay
CRCW08052K70FK
R8
1.8 kΩ
Vishay
CRCW06031K80FK
R9
22 kΩ
Vishay
CRCW060322K0FK
R10
47 kΩ
Vishay
CRCW060347K0FK
R12, R13, R15, R16
1 kΩ
Vishay
CRCW06031K00FK
R14
3.3 kΩ
Vishay
CRCW06033K30FK
R19
22 kΩ
Vishay
CRCW080522K0FK
R20, R21
1 kΩ
Yageo
AC0805FR-071KL
R22
5.6 kΩ
Vishay
CRCW06035K60FK
R23
56 kΩ
Vishay
CRCW060356K0FK
R24, R28
8 mΩ
Vishay
WFCP06128L000FE66

User guide
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Revision 1.00
2022-12-22
TLD6098-2DPVB2G_EVAL
User guide
System design
Designator
Value
Manufacturer
Manufacturer order number
R25, R29
0 Ω
Vishay
CRCW08050000Z0EAHP
R26, R30
3 mΩ
Bourns
CRE2512-FZ-R003E-3
R27
4.53 kΩ
Vishay
CRCW08054K53FK
R31
30 mΩ
Panasonic
ERJC1CFR03U
X1, X2
-
Phoenix Contact
1935776
X3, X4, X5, X6
-
Keystone Electronics Corp.
575-8
X8
-
Harwin
D3082-05
X9
-
-
Solder Jumper 2 Pins
X10
-
Samtec
HTSW-102-07-L-S
X11
-
Harwin
M7583-05

User guide
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Revision 1.00
2022-12-22
TLD6098-2DPVB2G_EVAL
User guide
System design
3.4 Electrical performance
Figure 16 Input currents, switching nodes, output voltage (VIN = 12 V, VOUT = 48 V, IOUT = 7 A)
Figure 17 Load dump (VIN = 14 V, VOUT = 48 V, IOUT = 0 A to 7 A, Rise time < 10 µs)

User guide
20
Revision 1.00
2022-12-22
TLD6098-2DPVB2G_EVAL
User guide
System design
3.5 Efficiency measurements
Figure 18 Efficiency vs. input voltage performance
This efficiency performance has been obtained with:
Table 6 Efficiency measurement conditions
Output load:
Constant current sink set at 7 A
Output voltage:
48 V
Ambient temperature:
25°C
Current Mode:
Disabled (jumper X10 left open)
Current sensing resistor (R31):
Active (jumper X7 left open)
Compensation clamping diode (D3):
Active (jumper X9 closed)
80
82
84
86
88
90
92
94
96
98
100
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Efficiency[%]
Input Voltage [V]
Efficiency vs. Input Voltage