LITIX™ Basic
TLD1314EL
3 Channel High-Side Current Source
1
Package
PG-SSOP-14
Marking
TLD1314
Overview
Applications
•
Exterior LED lighting applications such as tail/brake light, turn indicator,
position light, side marker,...
•
Interior LED lighting applications such as ambient lighting, interior
illumination and dash board lighting.
Internal
supply
Current
adjustment
TLD1314EL
* In case PWM via VS is performed
** For EMI improvement if required
4.7nF**
OUT2
OUT1
Status
GND
IN_SET
CST =100pF**
Diagnosis
enable
ST
DEN
OUT3
Output
control
470kΩ*
RSET
Thermal
protection
4.7nF**
ISO-Pulse
protection circuit
depending on
requirements
4.7nF**
VS
GND
CVS =4.7nF
Cmod =2.2µF
VBATT
to other LITIX™ Basic
Application Diagram with TLD1314EL
Data Sheet
www.infineon.com
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Overview
Basic Features
•
3 Channel device with integrated output stages (current sources), optimized to drive LEDs with output
current up to 120 mA per channel
•
Low current consumption
•
PWM-operation supported via VS-pin
•
Output current adjustable via external low power resistor and possibility to connect PTC resistor for LED
protection during over temperature conditions
•
Reverse polarity protection and overload protection
•
Undervoltage detection
•
Open load and short circuit to GND diagnosis
•
Wide temperature range: -40°C < Tj < 150°C
•
PG-SSOP-14 package with exposed heatslug
Description
The LITIX™ Basic TLD1314EL is a three channel high side driver IC with integrated output stages. It is designed
to control LEDs with a current up to 120 mA. In typical automotive applications the device is capable to drive
i.e. 3 red LEDs per chain (total 9 LEDs) with a current up to 60 mA, which is limited by thermal cooling aspects.
The output current is controlled practically independent of load and supply voltage changes.
Table 1
Product Summary
Parameter
Symbol
Value
Operating voltage range
VS(nom)
5.5 V ... 40 V
Maximum voltage
VS(max)
VOUTx(max)
40 V
Nominal output (load) current
IOUTx(nom)
60 mA when using a supply voltage range of 8 V - 18 V (e.g.
Automotive car battery). Currents up to IOUT(max) possible in
applications with low thermal resistance RthJA
Maximum output (load) current
IOUTx(max)
120 mA; depending on thermal resistance RthJA
Output current accuracy at RSET = 12 kΩ
kLT
750 ± 7%
Protective Functions
•
ESD protection
•
Under voltage lock out
•
Over Load protection
•
Over Temperature protection
•
Reverse Polarity protection
Diagnostic Functions
•
Diagnosis enable function
•
OL detection
•
SC to Vs (indicated by OL diagnosis)
•
SC to GND detection
Data Sheet
2
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Block Diagram
Block Diagram
VS
2
Internal
supply
IN_SET
Diagnosis
enable
Current
adjustment
TLD1314EL
Figure 1
Data Sheet
OUT2
OUT1
Status
ST
DEN
Output
control
GND
Thermal
protection
OUT3
Basic Block Diagram
3
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Pin Configuration
3
Pin Configuration
3.1
Pin Assignment
Figure 2
Data Sheet
VS
1
VS
2
DEN
3
NC
4
NC
14
NC
13
OUT3
12
OUT2
11
OUT1
5
10
ST
IN_SET
6
9
GND
NC
7
8
NC
TLD1314EL
EP
Pin Configuration
4
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Pin Configuration
3.2
Pin Definitions and Functions
Pin
Symbol
Input/
Output
Function
1, 2
VS
–
Supply Voltage; battery supply, connect a decoupling capacitor (100 nF - 1 µF)
to GND
3
DEN
I
Diagnosis enable pin
4
NC
–
Pin not connected
5
NC
–
Pin not connected
6
IN_SET
I/O
Input / SET pin; Connect a low power resistor to adjust the output current
8
NC
–
Pin not connected
9
GND
–
1)
10
ST
I/O
Status pin
11
OUT1
O
Output 1
12
OUT2
O
Output 2
13
OUT3
O
Output 3
14
NC
–
Pin not connected
–
1)
Exposed
Pad
GND
Ground
Exposed Pad; connect to GND in application
1) Connect all GND-pins together.
Data Sheet
5
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
General Product Characteristics
4
General Product Characteristics
4.1
Absolute Maximum Ratings
Absolute Maximum Ratings 1)
Tj = -40°C to +150°C; all voltages with respect to ground, positive current flowing into pin for input pins (I),
positive currents flowing out of the I/O and output pins (O) (unless otherwise specified)
Pos.
Parameter
Symbol
Limit Values
Min.
Max.
Unit
Conditions
Voltages
4.1.1
Supply voltage
VS
-16
40
V
–
4.1.2
Diagnosis enable voltage DEN
VDEN
-16
40
V
–
4.1.3
Diagn. enable voltage DEN related to VS VDEN(VS)
VS - 40
VS + 16
V
–
4.1.4
Diagn. enable voltage DEN related to
VOUTx
VDEN - VOUTx
VDEN VOUTx
-16
40
V
–
4.1.5
Output voltage
VOUTx
-1
40
V
–
4.1.6
Power stage voltage
VPS = VS - VOUTx
VPS
-16
40
V
–
4.1.7
IN_SET voltage
VIN_SET
-0.3
6
V
–
4.1.8
Status voltage
VST
-0.3
6
V
–
4.1.9
IN_SET current
IIN_SET
–
–
2
8
mA
–
Diagnosis output
4.1.10
Output current
IOUTx
–
130
mA
–
Currents
Temperatures
4.1.11
Junction temperature
Tj
-40
150
°C
–
4.1.12
Storage temperature
Tstg
-55
150
°C
–
ESD Susceptibility
4.1.13
ESD resistivity to GND
VESD
-2
2
kV
Human Body
Model (100 pF via
1.5 kΩ)2)
4.1.14
ESD resistivity all pins to GND
VESD
-500
500
V
CDM3)
4.1.15
ESD resistivity corner pins to GND
VESD
-750
750
V
CDM3)
1) Not subject to production test, specified by design
2) ESD susceptibility, Human Body Model “HBM” according to ANSI/ESDA/JEDEC JS-001-2011
3) ESD susceptibility, Charged Device Model “CDM” according to JESD22-C101E
Note: Stresses above the ones listed here may cause permanent damage to the device. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Note: Integrated protection functions are designed to prevent IC destruction under fault conditions described in
the data sheet. Fault conditions are considered as “outside” normal operating range. Protection functions
are not designed for continuous repetitive operation.
Data Sheet
6
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
General Product Characteristics
4.2
Pos.
Functional Range
Parameter
Symbol
Limit Values
Min.
Max.
Unit
Conditions
4.2.16
Supply voltage range for
normal operation
VS(nom)
5.5
40
V
–
4.2.17
Power on reset threshold
VS(POR)
–
5
V
RSET = 12 kΩ
IOUTx = 80% IOUTx(nom)
VOUTx = 2.5 V
4.2.18
Junction temperature
Tj
-40
150
°C
–
Note: Within the functional range the IC operates as described in the circuit description. The electrical
characteristics are specified within the conditions given in the related electrical characteristics table.
4.3
Pos.
Thermal Resistance
Parameter
Symbol
4.3.1
Junction to Case
RthJC
4.3.2
Junction to Ambient 1s0p board
RthJA1
4.3.3
Junction to Ambient 2s2p board
Limit Values
Min.
Typ.
Max.
–
8
10
–
–
61
56
Unit
Conditions
K/W
1) 2)
K/W
1) 3)
–
–
Ta = 85 °C
Ta = 135 °C
K/W
RthJA2
–
–
45
43
–
–
1) 4)
Ta = 85 °C
Ta = 135 °C
1) Not subject to production test, specified by design. Based on simulation results.
2) Specified RthJC value is simulated at natural convection on a cold plate setup (all pins and the exposed Pad are fixed to
ambient temperature). Ta = 85°C, Total power dissipation 1.5 W.
3) The RthJA values are according to Jedec JESD51-3 at natural convection on 1s0p FR4 board. The product (chip + package)
was simulated on a 76.2 x 114.3 x 1.5 mm3 board with 70 µm Cu, 300 mm2 cooling area. Total power dissipation 1.5 W
distributed statically and homogenously over all power stages.
4) The RthJA values are according to Jedec JESD51-5,-7 at natural convection on 2s2p FR4 board. The product (chip +
package) was simulated on a 76.2 x 114.3 x 1.5 mm3 board with 2 inner copper layers (outside 2 x 70 µm Cu, inner 2 x
35 µm Cu). Where applicable, a thermal via array under the exposed pad contacted the first inner copper layer. Total power
dissipation 1.5 W distributed statically and homogenously over all power stages.
Data Sheet
7
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
DEN Pin
5
DEN Pin
The DEN pin is a single function pin:
DEN
Output Control
IDEN
Figure 3
VDEN
Block Diagram DEN pin
This pin is used to activate or deactivate the device internal diagnosis functions. The diagnostic functions are
described in Chapter 6.2, Chapter 7 and Chapter 8. The diagnosis is activated, if the voltage applied at the
DEN pin VDEN is higher than VDEN(act). The diagnosis is disabled for voltages below VDEN(dis).
A possibility to use the DEN pin is via a Zener diode, which is connected between VS and DEN pin. A circuit
example is shown in the application information section Chapter 10.
The diagnosis is activated, if the following condition is fulfilled:
(1)
V S ≥ VDEN ( act ) + VZD
The current consumption on the DEN pin has to be considered for the total device current consumption. The
current is specified in Pos. 5.1.8. The typical current consumption IDEN(H) as a function of the supply voltage VS
for a Zener diode voltage of VZD = 6 V is shown in the following diagram.
Typical IDEN=f(VS) with (VS-VDEN)=6V
160
140
120
IDEN [µA]
100
80
Tj=-40°C
Tj=25°C
60
Tj=150°C
40
20
0
0
2
4
6
8
10
12
14
16
18
VS [V]
Figure 4
Typical IDEN(H) current for a Zener diode voltage of 6 V
The device and channel turn on is independent of the VDEN-voltage. After applying a supply voltage the device
is activated after the power on reset time tPOR.
Data Sheet
8
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
DEN Pin
VS
tPOR
IOU T
100%
80%
t
Figure 5
Power on reset
The DEN voltage VDEN does not influence the disable function via the ST pin. If VDEN < VDEN(dis) the device can still
be disabled via the ST pin, if VST > VST(H). For details, please refer to Chapter 7.3.
5.1
Electrical Characteristics Internal Supply / DEN Pin
Electrical Characteristics Internal Supply / DEN pin
Unless otherwise specified: VS = 5.5 V to 40 V, Tj = -40°C to +150°C, RSET = 12 kΩ all voltages with respect to
ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output
pins (O) (unless otherwise specified)
Pos.
Parameter
Symbol
Limit Values
Min.
Typ.
Max.
Unit
Conditions
1)
5.1.1
Current consumption,
active mode
IS(on)
–
–
1.9
mA
IIN_SET = 0 µA
Tj < 105 °C
VS = 18 V
VOUTx = 3.6V
5.1.2
Current consumption,
device disabled via ST
IS(dis,ST)
–
–
1.7
mA
1)
VS = 18 V
Tj < 105 °C
VST = 5 V
5.1.3
Current consumption,
IS(dis,IN_SET)
device disabled via IN_SET
–
–
1.7
mA
1)
5.1.4
Current consumption,
IS(fault,STu)
active mode in single fault
detection condition with
ST-pin unconnected
–
–
2.1
mA
Data Sheet
9
VS = 18 V
Tj < 105 °C
VIN_SET = 5 V
1)
VS = 18 V
Tj < 105 °C
RSET = 12 kΩ
VOUTx = 18 V or 0 V
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
DEN Pin
Electrical Characteristics Internal Supply / DEN pin (cont’d)
Unless otherwise specified: VS = 5.5 V to 40 V, Tj = -40°C to +150°C, RSET = 12 kΩ all voltages with respect to
ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output
pins (O) (unless otherwise specified)
Pos.
Parameter
Symbol
Limit Values
Min.
Typ.
Max.
Unit
Conditions
1)
5.1.5
Current consumption,
IS(fault,STG)
active mode in single fault
detection condition with
ST-pin connected to GND
–
–
6.2
mA
VS = 18 V
Tj < 105 °C
RSET = 12 kΩ
VOUTx = 18 V or 0 V
VST = 0 V
5.1.6
Power-on reset delay time tPOR
–
–
25
µs
3)
VS = 0 →13.5 V
VOUTx(nom) = 3.6 ± 0.3V
IOUTx = 80% IOUTx(nom)
5.1.7
Required supply voltage
for current control
VS(CC)
–
–
5.5
V
VOUTx = 3.6 V
IOUTx ≥ 90% IOUTx(nom)
5.1.8
DEN high input current
IDEN(H)
mA
Tj < 105 °C
VS = 13.5 V, VDEN = 5.5 V
VS = 18 V, VDEN = 5.5 V
VS = 18 V, VDEN = 12 V
VS = VDEN = 18 V
V
VS = 8...18 V
5.1.9
2)
DEN activation threshold
(diagnosis enabled above
VDEN(act))
VDEN(act)
–
–
–
–
–
–
–
–
0.1
0.1
0.2
0.4
2.45
–
3.2
5.1.10
DEN deactivation
1.5
–
2.3
V
VS = 8...18 V
VDEN(dis)
threshold (diagnosis
disabled below VDEN(dis))
1) The total device current consumption is the sum of the currents IS and IDEN(H), please refer to Pos. 5.1.8
2) See also Figure 5
3) Not subject to production test, specified by design
Data Sheet
10
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
IN_SET Pin
6
IN_SET Pin
The IN_SET pin is a multiple function pin for output current definition, input and diagnostics:
Logic
IN_SET
high impedance
IIN_SET
VIN_SET
VIN_SET(OL/SC)
GND
Figure 6
Block Diagram IN_SET pin
6.1
Output Current Adjustment via RSET
The output current for all three channels can only be adjusted simultaneously. The current adjustment can be
done by placing a low power resistor (RSET) at the IN_SET pin to ground. The dimensioning of the resistor can
be done using the formula below:
kR SET = ---------I OUT
(2)
The gain factor k (RSET * output current) is specified in Pos. 9.2.4 and Pos. 9.2.5. The current through the RSET
is defined by the resistor itself and the reference voltage VIN_SET(ref), which is applied to the IN_SET during
supplied device.
6.2
Smart Input Pin
The IN_SET pin can be connected via RSET to the open-drain output of a µC or to an external NMOS transistor
as described in Figure 7 This signal can be used to turn off the output stages of the IC. A minimum IN_SET
current of IIN_SET(act) is required to turn on the output stages. This feature is implemented to prevent glimming
of LEDs caused by leakage currents on the IN_SET pin, see Figure 10 for details. In addition, the IN_SET pin
offers the diagnostic feedback information, if the status pin is connected to GND and VDEN > VDEN(act) (refer to
Chapter 5). Another diagnostic possibility is shown in Figure 8, where the diagnosis information is provided
via the ST pin (refer to Chapter 7 and Chapter 8) to a micro controller In case of a fault event with the ST pin
connected to GND the IN_SET voltage is increased to VIN_SET(OL/SC) Pos. 8.3.2. Therefore, the device has two
voltage domains at the IN_SET-pin, which is shown in Figure 11.
Data Sheet
11
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
IN_SET Pin
Microcontroller
(e.g. XC866)
OUT
RSET/2
RSET/2
IN_SET
Current
adjust
Status
Basic LED Driver
ST
GND
IN
VDDP = 5 V
Figure 7
Schematics IN_SET interface to µC, diagnosis via IN_SET pin
Microcontroller
(e.g. XC866)
OUT
RSET
IN_SET
Current
adjust
Status
Basic LED Driver
ST
GND
IN
VDDP = 5 V
Figure 8
optional
Schematics IN_SET interface to µC, diagnosis via ST pin
The resulting switching times are shown in Figure 9:
IIN_ SET
IOU T
tON (IN_ SET )
tOFF(IN _ SET)
t
100%
80%
20%
t
Figure 9
Data Sheet
Switching times via IN_SET
12
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
IN_SET Pin
IOUT [mA]
k = IOUTx * VIN_SET(ref) / IIN_SETx
IOUTx
IIN_SET(ACT)
Figure 10
IIN_SETx
IIN_SET [µA]
IOUT versus IINSET
V IN_ SET
VIN _SET( OL /SC)m ax
Diagnostic voltage range
V IN_ SET(OL /SC) m in
VIN _SET (ref ) m ax
Normal operation and high temperature current
reduction range
Figure 11
Data Sheet
Voltage domains for IN_SET pin, if ST pin is connected to GND
13
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
ST Pin
7
ST Pin
The ST pin is a multiple function pin.
IST(OL/SC)
VST(OL/SC)
No fault
Fault
Output Control
ST
No fault
Fault
VST
IST(PD)
Figure 12
Block Diagram ST pin
7.1
Diagnosis Selector
If the voltage at the DEN pin VDEN is higher than VDEN(act), the diagnosis is activated. For details, please refer to
Chapter 5. If the status pin is unconnected or connected to GND via a high ohmic resistor (VST to be below
VST(L)), the ST pin acts as diagnosis output pin. In normal operation (device is activated) the ST pin is pulled to
GND via the internal pull down current IST(PD). In case of an open load or short circuit to GND condition the ST
pin is switched to VST(OL/SC) after the open load or short circuit detection filter time (Pos. 8.3.9, Pos. 8.3.12).
If the device is operated in PWM operation via the VS pin the ST pin should be connected to GND via a high
ohmic resistor (e.g. 470 kΩ) to ensure proper device behavior during fast rising VS slope.
If the ST pin is shorted to GND the diagnostic feedback is performed via the IN_SET-pin, which is shown in
Chapter 6.2 and Chapter 8.
7.2
Diagnosis Output
If the status pin is unconnected or connected to GND via a high ohmic resistor (VST to be below VST(L)), it acts as
a diagnostic output, if the voltage at the DEN pin is above VDEN(act). In case of a fault condition the ST pin rises
its voltage to VST(OL/SC) (Pos. 8.3.7). Details are shown in Chapter 8.
7.3
Disable Input
If an external voltage higher than VST(H) (Pos. 8.3.5) is applied to the ST pin, the device is switched off. This
function is working independently of the voltage at the DEN pin. Even if the diagnosis is disabled via
VDEN < VDEN(dis) the disable function of the ST pin is working. This function is used for applications, where
multiple drivers should be used for one light function. It is possible to combine the drivers’ fault diagnosis via
the ST pins. If a single LED chain fails, the entire light function is switched off. In this scenario e.g. the
diagnostic circuit on the body control module can easily distinguish between the two cases (normal load or
load fault), because nearly no current is flowing into the LED module during the fault scenario - the drivers
consume a current of IS(fault,STu) (Pos. 5.1.4) or IS(dis,ST) (Pos. 5.1.2).
Data Sheet
14
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
ST Pin
As soon as one LED chain fails, the ST-pin of this device is switched to VST(OL/SC). The other devices used for the
same light function can be connected together via the ST pins. This leads to a switch off of all devices
connected together. Application examples are shown in Chapter 10.
V ST
IOU T
tON (ST)
tOFF( ST)
t
100%
80%
20%
t
Figure 13
Data Sheet
Switching times via ST Pin
15
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Load Diagnosis
8
Load Diagnosis
The diagnosis function is enabled, if the voltage at the DEN pin VDEN is above VDEN(act) as described in Chapter 5.
8.1
Open Load
An open load diagnosis feature is integrated in the TLD1314EL driver IC. If there is an open load on one of the
outputs, the outputs are turned off. The potential on the IN_SET pin rises up to VIN_SET(OL/SC), if the ST is
connected to GND. This high voltage can be used as input signal for an µC as shown in Figure 8. If the ST pin
is open or connected to GND via a high ohmic resistor, the ST pin rises to a high potential as described in
Chapter 7. More details are shown in Figure 17. The open load status is not latched, as soon as the open load
condition is no longer present, the output stage will be turned on again. An open load condition is detected, if
the voltage drop over the output stage VPS is below the threshold according Pos. 8.3.10 and a filter time of tOL
is passed.
V IN_ SET
VIN _SET( OL /SC)
VIN_ SET( ref )
tOL
tIN _SET (re se t)
VOU T
t
VS
V S – VPS(OL )
VF
open load
occurs
open load
disappears
t
Figure 14
Data Sheet
IN_SET behavior during open load condition with ST pin connected to GND and VDEN > VDEN(act)
16
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Load Diagnosis
VIN _SET
VIN _SET( ref )
t
VST
V ST( OL /SC)
tOL
tIN_ SET(re se t)
VOU T
t
VS
VS – VPS( OL)
VF
open load
occurs
open load
disappears
t
Figure 15
IN_SET and ST behavior during open load condition (ST unconnected) and VDEN > VDEN(act)
8.2
Short Circuit to GND detection
The TLD1314EL has an integrated SC to GND detection. If the output stage is turned on and the voltage at the
output falls below VOUT(SC) the potential on the IN_SET pin is increased up to VIN_SET(OL/SC) after tSC, if the ST pin
is connected to GND. If the ST is open or connected to GND via a high ohmic resistor the fault is indicated on
the ST pin according to Chapter 7 after tSC. More details are shown in Figure 17. This condition is not latched.
For detecting a normal condition after a short circuit detection an output current according to IOUT(SC) is driven
by the channel.
Data Sheet
17
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Load Diagnosis
VIN _SET
VIN _SET( OL /SC)
VIN _SET (ref )
VOU T
tSC
t
tIN_ SET( re se t)
VF
VOUT (SC)
t
short circuit
occurs
Figure 16
short circuit
disappears
IN_SET behavior during short circuit to GND condition with ST connected to GND and VDEN >
VDEN(act)
V IN_ SET
V IN_ SET(ref )
t
V ST
VST (OL /SC)
V OU T
tSC
tIN _SET (re se t)
t
VF
V OUT (SC)
t
short circuit
occurs
Figure 17
Data Sheet
short circuit
disappears
IN_SET and ST behavior during short circuit to GND condition (ST unconnected) and VDEN >
VDEN(act)
18
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Load Diagnosis
Note: In applications, where 1 output of the LITIX™ Basic IC is not used, a zener diode can be connected to the
output to avoid unintended open load or short circuit conditions. The zener voltage should be in the range
of the LEDs’ forward voltage.
8.3
Electrical Characteristics IN_SET Pin and Load Diagnosis
Electrical Characteristics IN_SET pin and Load Diagnosis
Unless otherwise specified: VS = 5.5 V to 40 V, Tj = -40°C to +150°C, RSET = 12 kΩ, VDEN = 5.5 V, all voltages with respect to
ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output pins (O)
(unless otherwise specified)
Pos.
Parameter
Symbol
Unit
Conditions
1)
Min.
Typ.
Max.
1.19
1.23
1.27
V
VOUTx = 3.6 V
Tj = 25...115 °C
1)
8.3.1
IN_SET reference
voltage
8.3.2
IN_SET open load/short VIN_SET(OL/SC) 4
circuit voltage
–
5.5
V
VS > 8 V
Tj = 25...150 °C
VS = VOUTx (OL) or
VOUTx = 0 V (SC)
8.3.3
IN_SET open load/short IIN_SET(OL/SC)
circuit current
1.5
–
7.4
mA
1)
VS > 8 V
Tj = 25...150 °C
VIN_SET = 4 V
VS = VOUTx (OL) or
VOUT = 0 V (SC)
8.3.4
VST(L)
ST device turn on
threshold (active low) in
case of voltage applied
from external (ST-pin
acting as input)
0.8
–
–
V
–
8.3.5
VST(H)
ST device turn off
threshold (active low) in
case of voltage applied
from external (ST-pin
acting as input)
–
–
2.5
V
–
8.3.6
ST pull down current
IST(PD)
–
–
15
µA
VST = 0.8 V
8.3.7
ST open load/short
circuit voltage (ST-pin
acting as diagnosis
output)
VST(OL/SC)
4
–
5.5
V
1)
VS > 8 V
Tj = 25...150 °C
RST = 470 kΩ
VS = VOUTx (OL) or
VOUT = 0 V (SC)
8.3.8
ST open load/short
circuit current (ST-pin
acting as diagnosis
output)
IST(OL/SC)
100
–
220
µA
1)
VS > 8 V
Tj = 25...150 °C
VST = 2.5 V
VS = VOUTx (OL) or
VOUT = 0 V (SC)
8.3.9
OL detection filter time
tOL
10
22
35
µs
1)
Data Sheet
VIN_SET(ref)
Limit Values
19
VS > 8 V
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Load Diagnosis
Electrical Characteristics IN_SET pin and Load Diagnosis (cont’d)
Unless otherwise specified: VS = 5.5 V to 40 V, Tj = -40°C to +150°C, RSET = 12 kΩ, VDEN = 5.5 V, all voltages with respect to
ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output pins (O)
(unless otherwise specified)
Pos.
Parameter
Symbol
Limit Values
Min.
Typ.
Max.
Unit
Conditions
8.3.10
OL detection voltage
VPS(OL) = VS - VOUTx
VPS(OL)
0.2
–
0.4
V
VS > 8 V
8.3.11
Short circuit to GND
detection threshold
VOUT(SC)
0.8
–
1.4
V
VS > 8 V
8.3.12
SC detection filter time
tSC
10
22
35
µs
1)
VS > 8 V
VS > 8 V
–
5
20
µs
1)
SC detection current in IOUT(SC,STu)
case of unconnected STpin
100
200
300
µA
VS > 8 V
VOUTx = 0 V
SC detection current in
case of ST-pin shorted
to GND
0.1
2
4.75
mA
VS > 8 V
VOUTx = 0 V
VST = 0 V
–
15
µA
See Figure 10
8.3.13
IN_SET diagnosis reset
time
8.3.14
8.3.15
tIN_SET(reset)
IOUT(SC,STG)
8.3.16
IN_SET activation
IIN_SET(act)
2
current without turn on
of output stages
1) Not subject to production test, specified by design
Data Sheet
20
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Power Stage
9
Power Stage
The output stages are realized as high side current sources with a current of 120 mA. During off state the
leakage current at the output stage is minimized in order to prevent a slightly glowing LED.
The maximum current of each channel is limited by the power dissipation and used PCB cooling areas (which
results in the applications RthJA).
For an operating current control loop the supply and output voltages according to the following parameters
have to be considered:
•
•
•
Required supply voltage for current control VS(CC), Pos. 5.1.7
Voltage drop over output stage during current control VPS(CC), Pos. 9.2.6
Required output voltage for current control VOUTx(CC), Pos. 9.2.7
9.1
Protection
The device provides embedded protective functions, which are designed to prevent IC destruction under fault
conditions described in this data sheet. Fault conditions are considered as “outside” normal operating range.
Protective functions are neither designed for continuous nor for repetitive operation.
9.1.1
Over Load Behavior
An over load detection circuit is integrated in the LITIX™ Basic IC. It is realized by a temperature monitoring of
the output stages (OUTx).
As soon as the junction temperature exceeds the current reduction temperature threshold Tj(CRT) the output
current will be reduced by the device by reducing the IN_SET reference voltage VIN_SET(ref). This feature avoids
LED’s flickering during static output overload conditions. Furthermore, it protects LEDs against over
temperature, which are mounted thermally close to the device. If the device temperature still increases, the
three output currents decrease close to 0 A. As soon as the device cools down the output currents rise again.
IOU T
V IN_ SET
Tj (C R T)
Figure 18
Tj
Output current reduction at high temperature
Note: This high temperature output current reduction is realized by reducing the IN_SET reference voltage
voltage (Pos. 8.3.1). In case of very high power loss applied to the device and very high junction
temperature the output current may drop down to IOUTx = 0 mA, after a slight cooling down the current
increases again.
9.1.2
Reverse Battery Protection
The TLD1314EL has an integrated reverse battery protection feature. This feature protects the driver IC itself,
but also connected LEDs. The output reverse current is limited to IOUTx(rev) by the reverse battery protection.
Data Sheet
21
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Power Stage
Note: Due to the reverse battery protection a reverse protection diode for the light module may be obsolete. In
case of high ISO-pulse requirements and only minor protecting components like capacitors a reverse
protection diode may be reasonable. The external protection circuit needs to be verified in the application.
9.2
Electrical Characteristics Power Stage
Electrical Characteristics Power Stage
Unless otherwise specified: VS = 5.5 V to 18 V, Tj = -40°C to +150°C, VOUTx = 3.6 V, all voltages with respect to
ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output
pins (O) (unless otherwise specified)
Pos.
Parameter
Symbol
Limit Values
Min.
9.2.1
Output leakage current
Typ.
Unit
Conditions
µA
IIN_SET = 0 µA
VOUTx = 2.5 V
Tj = 150 °C
1)
Tj = 85 °C
Max.
IOUTx(leak)
–
–
–
–
7
3
9.2.2
Output leakage current in
boost over battery setup
–
IOUTx(leak,B2B)
–
50
µA
1)
9.2.3
Reverse output current
-IOUTx(rev)
–
1
µA
1)
9.2.4
Output current accuracy
kLT
limited temperature range
–
Output current accuracy
over temperature
VS = -16 V
Output load: LED with
break down voltage
< - 0.6 V
1)
697
645
9.2.5
IIN_SET = 0 µA
VOUTx = VS = 40 V
750
750
Tj = 25...115 °C
VS = 8...18 V
VPS = 2 V
RSET = 6...12 kΩ
RSET = 30 kΩ
803
855
1)
kALL
697
645
750
750
803
855
Tj = -40...115 °C
VS = 8...18 V
VPS = 2 V
RSET = 6...12 kΩ
RSET = 30 kΩ
9.2.6
Voltage drop over power
stage during current
control VPS(CC) = VS - VOUTx
VPS(CC)
0.75
–
–
V
1)
9.2.7
Required output voltage
for current control
VOUTx(CC)
2.3
–
–
V
1)
Data Sheet
22
VS = 13.5 V
RSET = 12 kΩ
IOUTx ≥ 90% of
(kLT(typ)/RSET)
VS = 13.5 V
RSET = 12 kΩ
IOUTx ≥ 90% of
(kLT(typ)/RSET)
Rev. 1.21
2021-07-05
LITIX™ Basic
TLD1314EL
Power Stage
Electrical Characteristics Power Stage (cont’d)
Unless otherwise specified: VS = 5.5 V to 18 V, Tj = -40°C to +150°C, VOUTx = 3.6 V, all voltages with respect to
ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output
pins (O) (unless otherwise specified)
Pos.
Parameter
Symbol
Limit Values
Min.
Typ.
Max.
Unit
Conditions
9.2.8
Maximum output current
IOUT(max)
120
–
–
mA
RSET = 4.7 kΩ
The maximum output
current is limited by the
thermal conditions.
Please refer to
Pos. 4.3.1 - Pos. 4.3.3
9.2.9
ST turn on time
tON(ST)
–
–
15
µs
2)
VS = 13.5 V
RSET = 12 kΩ
ST → L
IOUTx = 80% of
(kLT(typ)/RSET)
9.2.10
ST turn off time
tOFF(ST)
–
–
10
µs
2)
VS = 13.5 V
RSET = 12 kΩ
ST →H
IOUTx = 20% of
(kLT(typ)/RSET)
9.2.11
IN_SET turn on time
tON(IN_SET)
–
–
15
µs
VS = 13.5 V
IIN_SET = 0 → 100 µA
IOUTx = 80% of
(kLT(typ)/RSET)
9.2.12
IN_SET turn off time
tOFF(IN_SET)
–
–
10
µs
VS = 13.5 V
IIN_SET = 100 → 0 µA
IOUTx = 20% of
(kLT(typ)/RSET)
9.2.13
Current reduction
temperature threshold
Tj(CRT)
–
140
–
°C
1)
–
A
9.2.14
Output current during
IOUT(CRT)
85% of –
current reduction at high
(kLT(typ)
temperature
/RSET)
1) Not subject to production test, specified by design
2) see also Figure 13
Data Sheet
23
IOUTx = 95% of
(kLT(typ)/RSET)
1)
RSET = 12 kΩ
Tj = 150 °C
Rev. 1.21
2021-07-05
LITIX™ Basic
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
PROFET
VBB
channel1
load current
sense
internal
power
supply
logic
open load
detect ion
IN1
IS1
ESD
protection
clamp for
inductive load
gate control
&
charge pump
mult i step
load current
limitation
OU T 1
temperature
sensor
SEN
channel2
control and protection circuit
equivalent to
channel 1
IN2
IS2
OU T 2
R GND
GN D
VBATT
Cmod =2.2µF
VS
ISO-Pulse
protection circuit
depending on
requirements
CVS =4.7nF
VS
Internal
supply
CVS =4.7nF
DEN Diagnosis
Output
control
enable
Output
control
enable
R SET
LITIX™ Basic
4.7nF** 4.7nF** 4.7nF**
OUT3
OUT2
OUT1
IN_ SET Current
adjust
Status
Status
GND
Output
control
OUT1
IN_SET Current
ST
Diagnosis
enable
Thermal
protection
OUT2
OUT1
IN_SET Current
adjust
DEN
4.7nF** 4.7nF** 4.7nF**
OUT3
Thermal
protection
OUT2
Internal
supply
CVS =4.7nF
DEN Diagnosis
4.7nF** 4.7nF** 4.7nF**
OUT3
Thermal
protection
VS
Internal
supply
RSET
LITIX™ Basic
adjust
Status
ST
GND
RSET
LITIX™ Basic
VZD>VOUT( CC)
Status
Status
ST
ST
GND
R
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