LITIX™ Basic
TLD2314EL
3 Channel High-Side Current Source
1
Package
PG-SSOP-14
Marking
TLD2314
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 (e.g. RGB),
interior illumination and dash board lighting.
Thermal
protection
DEN
Diagnosis
enable
4.7nF**
Internal
supply
4.7nF**
ISO-Pulse
protection circuit
depending on
requirements
4.7nF**
VS
GND
CVS =4.7nF
Cmod =2.2µF
VBATT
OUT3
Output
control
OUT2
IN_SET3
OUT1
* In case PWM via VS is performed
** For EMI improvement if required
GND
Status
CST =100pF**
TLD2314EL
Current
adjustment
470kΩ*
RSET1
RSET2
RSET3
IN_SET1
ST
IN_SET2
to other LITIX™ Basic
Application Diagram with TLD2314EL
Data Sheet
www.infineon.com
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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 TLD2314EL 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 RSETx = 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. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
Block Diagram
Block Diagram
VS
2
Internal
supply
Thermal
protection
DEN
Diagnosis
enable
OUT3
Output
control
OUT2
IN_SET3
TLD2314EL
Figure 1
Data Sheet
OUT1
Status
GND
IN_SET1
Current
adjustment
ST
IN_SET2
Basic Block Diagram
3
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
Pin Configuration
3
Pin Configuration
3.1
Pin Assignment
Figure 2
Data Sheet
VS
1
VS
2
DEN
3
NC
4
IN_SET3
14
NC
13
OUT3
12
OUT2
11
OUT1
5
10
ST
IN_SET2
6
9
GND
IN_SET1
7
8
NC
TLD2314EL
EP
Pin Configuration
4
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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
IN_SET3
I/O
Input / SET pin 3; Connect a low power resistor to adjust the output current
6
IN_SET2
I/O
Input / SET pin 2; Connect a low power resistor to adjust the output current
7
IN_SET1
I/O
Input / SET pin 1; Connect a low power resistor to adjust the output current
8
NC
–
Pin not connected
–
1)
9
GND
Ground
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
Exposed Pad; connect to GND in application
1) Connect all GND-pins together.
Data Sheet
5
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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_SETx voltage
VIN_SETx
-0.3
6
V
–
4.1.8
Status voltage
VST
-0.3
6
V
–
4.1.9
IN_SETx current
IIN_SETx
–
–
2
3
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. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
General Product Characteristics
Functional Range
4.2
Pos.
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
RSETx = 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.
Thermal Resistance
4.3
Pos.
Parameter
Symbol
4.3.1
Junction to Case
RthJC
4.3.2
Junction to Ambient 1s0p board
RthJA1
4.3.3
1)
2)
3)
4)
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
1) 4)
–
45
–
Ta = 85 °C
–
43
–
Ta = 135 °C
Not subject to production test, specified by design. Based on simulation results.
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.
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.
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. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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. 5.1.9. 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. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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, RSETx = 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,
device disabled via
IN_SETx
IS(dis,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_SETx = 5 V (all)
1)
VS = 18 V
Tj < 105 °C
RSETx = 12 kΩ
VOUTx = 18 V or 0 V
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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, RSETx = 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
Unit
Conditions
1)
Min.
Typ.
Max.
–
–
6.2
mA
VS = 18 V
Tj < 105 °C
RSET1 = 12 kΩ
RSET2,3 = unconnected
VOUTx = 18 V or 0 V
VST = 0 V
–
–
9.2
mA
1)
VS = 18 V
Tj < 105 °C
RSET1,2 = 12 kΩ
RSET3 = unconnected
VOUTx = 18 V or 0 V
VST = 0 V
Power-on reset delay time tPOR
–
–
25
µs
3)
VS = 0 →13.5 V
VOUTx(nom) = 3.6 ± 0.3V
IOUTx = 80% IOUTx(nom)
5.1.8
Required supply voltage
for current control
VS(CC)
–
–
5.5
V
VOUTx = 3.6 V
IOUTx ≥ 90% IOUTx(nom)
5.1.9
DEN high input current
IDEN(H)
mA
–
–
–
–
–
–
–
–
0.1
0.1
0.2
0.4
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
2.45
–
3.2
V
VS = 8...18 V
5.1.5
Current consumption,
IS(fault,STG)
active mode in single fault
detection condition with
ST-pin connected to GND
5.1.6
Current consumption,
active mode in double
fault detection condition
one output disabled via
IN_SETx and with ST-pin
connected to GND
5.1.7
5.1.10
IS(dfault,STG)
2)
DEN activation threshold
(diagnosis enabled above
VDEN(act))
VDEN(act)
VDEN(dis)
1.5
–
2.3
V
VS = 8...18 V
DEN deactivation
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. 5.1.9
2) See also Figure 4
3) Not subject to production test, specified by design
5.1.11
Data Sheet
10
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
IN_SETx Pin
6
IN_SETx 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 of each channel can be adjusted independently. The current adjustment can be done by
placing a low power resistor (RSET) at the IN_SETx 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_SETx 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. 8.4.2. Therefore, the device has two
voltage domains at the IN_SET-pin, which is shown in Figure 11.
Note: If one output has a present fault (open load or short circuit) and one or both of the other channels are
dimmed via PWM at the IN_SET-pins a short spike to VIN_SET(OL/SC) is possible. Please refer to Chapter 8.3.
Data Sheet
11
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
IN_SETx 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. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
IN_SETx 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. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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. 8.4.9, Pos. 8.4.12).
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. 8.4.7). Details are shown in Chapter 8.
7.3
Disable Input
If an external voltage higher than VST(H) (Pos. 8.4.5) 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. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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.
V ST
IOU T
tON (ST)
tOFF( ST)
t
100%
80%
20%
t
Figure 13
Data Sheet
Switching times via ST Pin
15
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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 TLD2314EL driver IC. If there is an open load on one of the
outputs, the respective output is 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. 8.4.10 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. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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 TLD2314EL 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. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
Load Diagnosis
8.3
Double Fault Conditions
The TLD2314EL allows the diagnosis of each channel separately, as long as the ST-pin is shorted to GND The
diagnosis filter times tOL and tSC (Pos. 8.4.9 and Pos. 8.4.12) are valid only for the channel, which diagnoses
first the fault condition. For the other channel or channels with a subsequential fault the diagnosis is reported
immediately without the diagnosis filter time, if the filter time tOL has been elapsed for the channel with the
first fault. During activation via IN_SET of a non-faulty output, where one channel has already a fault detected,
a short spike to VIN_SET(OL/SC) could occur on the channel, which should be activated. Therefore, in general a
diagnosis should be done earliest after the diagnosis filter times tOL and tSC to avoid any incorrect diagnosis
readout. In the scenario mentioned above the turn on time tON(IN_SET) could be extended. The following figure
shows the example behavior, if OUT1 has a fault and OUT2 is operated in PWM-mode. OUT3 is disabled.
Data Sheet
19
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
Load Diagnosis
IIN_ SET1
V IN_SET (OL /SC) / RSET 1
V IN_SET (ref ) / RSET 1
t
VIN _SET 1
VIN _SET (OL /SC)
VIN _SET( ref )
tOL
t
VOU T1
VS
VS – VPS(OL )
VF
open load
occurs
t
IIN_ SET2
VIN _SET( OL /SC) / RSET2
VIN _SET( ref ) / RSET2
t
VIN _ SET2
turn on command
VIN _SET (OL /SC)
VIN _SET( ref )
t
VOU T2
VF
VOUT ( SC)
t
Figure 18
Data Sheet
Example single channel fault on OUT1 and PWM-operation on OUT2 with ST pin connected
to GND and VDEN > VDEN(act)
20
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
Load Diagnosis
8.4
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, RSETx = 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)
8.4.1
IN_SET reference
voltage
8.4.2
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)
8.4.3
IN_SET open load/short IIN_SET(OL/SC)
circuit current
0.5
–
2.5
mA
1)
VS > 8 V
Tj = 25...150 °C
VIN_SET = 4 V
VS = VOUTx (OL) or
VOUT = 0 V (SC)
8.4.4
VST(L)
ST device turn on
threshold (active low) in
case of voltage applied
from external (ST-pin
acting as input)
0.8
–
–
V
–
8.4.5
ST device turn off
VST(H)
threshold (active low) in
case of voltage applied
from external (ST-pin
acting as input)
–
–
2.5
V
–
8.4.6
ST pull down current
IST(PD)
–
–
15
µA
VST = 0.8 V
8.4.7
ST open load/short
circuit voltage (ST-pin
acting as diagnosis
output)
VST(OL/SC)
4
–
5.5
V
VS > 8 V
Tj = 25...150 °C
RST = 470 kΩ
VS = VOUTx (OL) or
VOUT = 0 V (SC)
8.4.8
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)
8.4.9
OL detection filter time
tOL
10
22
35
µs
1)
8.4.10
OL detection voltage
VPS(OL) = VS - VOUTx
VPS(OL)
0.2
–
0.4
V
VS > 8 V
8.4.11
Short circuit to GND
detection threshold
VOUT(SC)
0.8
–
1.4
V
VS > 8 V
8.4.12
SC detection filter time
tSC
10
22
35
µs
1)
Data Sheet
VIN_SET(ref)
Limit Values
21
1)
VS > 8 V
VS > 8 V
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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, RSETx = 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
tIN_SET(reset)
Limit Values
Unit
Conditions
20
µs
1)
Min.
Typ.
Max.
–
5
8.4.13
IN_SET diagnosis reset
time
8.4.14
SC detection current in IOUT(SC,STu)
case of unconnected STpin
100
200
300
µA
VS > 8 V
VOUTx = 0 V
8.4.15
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
IOUT(SC,STG)
8.4.16
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
22
VS > 8 V
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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. To increase the
overall output current for high brightness LED applications it is possible to connect two or all three output
stages in parallel.
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. 5.1.8
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 19
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. 8.4.1). 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.
Data Sheet
23
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
Power Stage
9.1.2
Reverse Battery Protection
The TLD2314EL 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.
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
RSETx = 6...12 kΩ
RSETx = 30 kΩ
803
855
1)
kALL
697
645
750
750
803
855
Tj = -40...115 °C
VS = 8...18 V
VPS = 2 V
RSETx = 6...12 kΩ
RSETx = 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
24
VS = 13.5 V
RSETx = 12 kΩ
IOUTx ≥ 90% of
(kLT(typ)/RSETx)
VS = 13.5 V
RSETx = 12 kΩ
IOUTx ≥ 90% of
(kLT(typ)/RSETx)
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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
RSETx = 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
RSETx = 12 kΩ
ST → L
IOUTx = 80% of
(kLT(typ)/RSETx)
9.2.10
ST turn off time
tOFF(ST)
–
–
10
µs
2)
VS = 13.5 V
RSETx = 12 kΩ
ST →H
IOUTx = 20% of
(kLT(typ)/RSETx)
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)/RSETx)
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)/RSETx)
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
/RSETx)
1) Not subject to production test, specified by design
2) see also Figure 13
Data Sheet
25
IOUTx = 95% of
(kLT(typ)/RSETx)
1)
RSETx = 12 kΩ
Tj = 150 °C
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
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.
V BATT
C mo d=2.2µF
CVS =4.7nF
VS
Microcontroller
(e.g.
XC866)
ISO-Pulse protection circuit
depending on requirements
Internal
supply
DEN Diagnosis
enable
Output
control
Thermal
protection
RSET/2
OUT3*
RSET/2
OUT2*
OUT1
TM
Basic
LED
Driver
LITIX
Basic
IN2
OUT2
IN_SET3
IN_SET2 Current
IN_SET1 adjust
IN3
4.7nF** 4.7nF** 4.7nF**
OUT3
Status
ST
GND
OUT1*
IN1
* Open Drain
Figure 20
** For EMI improvement, if required.
Application Diagram with Diagnosis for each channel
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. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
Package Outlines
11
Package Outlines
0.19 +0.06
0.08 C
0.15 M C A-B D 14x
0.64 ±0.25
1
8
1
7
0.2
M
D 8x
Bottom View
3 ±0.2
A
14
6 ±0.2
D
Exposed
Diepad
B
0.1 C A-B 2x
14
7
8
2.65 ±0.2
0.25 ±0.05 2)
0.1 C D
8˚ MAX.
C
0.65
3.9 ±0.11)
1.7 MAX.
Stand Off
(1.45)
0 ... 0.1
0.35 x 45˚
4.9 ±0.11)
Index Marking
1) Does not include plastic or metal protrusion of 0.15 max. per side
2) Does not include dambar protrusion
Dimensions in mm
PG-SSOP-14-1,-2,-3-PO V02
Figure 21
PG-SSOP-14
Green Product (RoHS compliant)
To meet the world-wide customer requirements for environmentally friendly products and to be compliant
with government regulations the device is available as a green product. Green products are RoHS-Compliant
(i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020).
For further information on alternative packages, please visit our website:
http://www.infineon.com/packages.
Data Sheet
27
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
Revision History
12
Revision History
Revision
Date
Changes
1.0
2013-08-08
Inital revision of data sheet
1.1
2015-03-19
Updated parameters KLT and KALL in the chapter Power Stage
1.2
2018-04-26
Updated to latest template
1.2
2018-04-26
Updated application drawing
1.2
2018-04-26
Updated package marking
1.2
2018-04-26
Updated package figure
Data Sheet
28
Rev. 1.2
2018-04-26
LITIX™ Basic
TLD2314EL
Table of Contents
1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3
3.1
3.2
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
4.1
4.2
4.3
General Product Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
5.1
DEN Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Characteristics Internal Supply / DEN Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6
6.1
6.2
IN_SETx Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Output Current Adjustment via RSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Smart Input Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7
7.1
7.2
7.3
ST Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosis Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosis Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disable Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
14
14
14
8
8.1
8.2
8.3
8.4
Load Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Open Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short Circuit to GND detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Double Fault Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics IN_SET Pin and Load Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
16
17
19
21
9
9.1
9.1.1
9.1.2
9.2
Power Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over Load Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reverse Battery Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics Power Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23
23
23
24
24
10
10.1
Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Further Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
11
Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
12
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6
6
7
7
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Data Sheet
29
Rev. 1.2
2018-04-26
Trademarks
All referenced product or service names and trademarks are the property of their respective owners.
Edition 2018-04-26
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2018 Infineon Technologies AG.
All Rights Reserved.
Do you have a question about any
aspect of this document?
Email: erratum@infineon.com
Document reference
TLD2314EL
IMPORTANT NOTICE
The information given in this document shall in no
event be regarded as a guarantee of conditions or
characteristics ("Beschaffenheitsgarantie").
With respect to any examples, hints or any typical
values stated herein and/or any information regarding
the application of the product, Infineon Technologies
hereby disclaims any and all warranties and liabilities
of any kind, including without limitation warranties of
non-infringement of intellectual property rights of any
third party.
In addition, any information given in this document is
subject to customer's compliance with its obligations
stated in this document and any applicable legal
requirements, norms and standards concerning
customer's products and any use of the product of
Infineon Technologies in customer's applications.
The data contained in this document is exclusively
intended for technically trained staff. It is the
responsibility of customer's technical departments to
evaluate the suitability of the product for the intended
application and the completeness of the product
information given in this document with respect to
such application.
For further information on technology, delivery terms
and conditions and prices, please contact the nearest
Infineon Technologies Office (www.infineon.com).
WARNINGS
Due to technical requirements products may contain
dangerous substances. For information on the types
in question please contact your nearest Infineon
Technologies office.
Except as otherwise explicitly approved by Infineon
Technologies in a written document signed by
authorized representatives of Infineon Technologies,
Infineon Technologies’ products may not be used in
any applications where a failure of the product or any
consequences of the use thereof can reasonably be
expected to result in personal injury.
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