Document
Low Dropout Linear LED Driver
TLE 4240-2/3 M
Features • • • • • • • • • • • Typ. 58 mA constant output current Low dropout voltage Tiny SMD package PG-SCT595-5 Open load detection (Version TLE 4240-3 M only) 45 V input voltage operation range Safe operation area monitoring Output protected against short circuit to GND and supply Reverse polarity protection Wide temperature range: -40 °C ≤ Tj ≤ 150 °C Overtemperature shutdown Suitable for use in automotive electronics
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PG-SCT-595
Functional Description The TLE 4240-2/3 M is a monolithic integrated low dropout linear constant current source. It is designed to supply white or color LEDs in order to achive constant brightness and extended LED lifetime independent from supply voltage or LED forward voltage class. Protection circuits prevent from damage to the device in case of overload, short circuit, reverse polarity and overheat. The LEDs connected are protected against reverse polarity transients as well as against voltages up to 45 V. The Safe Operation Area (SOA) monitoring function limits the output current in case of a very high drop voltage across the regulator. For details see graph “Output Current versus Drop Voltage”. Version TLE 4240-3 M is equipped with a status output indicating an open load failure condition. The TLE 4240-2/3 M is supplied in a space-saving PG-SCT595-5 package offering minimal thermal resistance.
Type TLE 4240-2 M TLE 4240-3 M
Datasheet
Package PG-SCT595-5 PG-SCT595-5
1
Remark – Open load detection
Marking 42 43
Rev. 1.1, 2006-12-07
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TLE 4240-2/3 M
n.c. GND I
1 5 2 3 4
Pinout.vsd
ST GND GND Q I
1 5 2 3 4
P inout.vsd
GND
Q
TLE 4240-2 M
TLE 4240-3 M
Figure 1 Table 1 1 1 n.c. ST
Pin Configuration (top view) Pin Definitions and Functions
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Pin No. Symbol Function Version TLE 4240-2 M only: Internally not connected. Version TLE 4240-3 M only: Status output; open collector output. Low level indicates open load. Connect to a positive voltage rail with an external pull-up resistor. Leave open, if not needed. Ground; connect to heatsink area. Interconnect with pin 5. Input; IC supply Output; Ground; connect to heatsink area. Interconnect with pin 2.
2 3 4 5
GND I Q GND
Datasheet
2
Rev. 1.1, 2006-12-07
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TLE 4240-2/3 M
TLE 4240-2 M Figure 2 Block Diagram
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TLE 4240-3 M
VBAT
TLE 4264 Voltage Regulator
5V µC 4k7 I/O
Open Load
ST I
Open Load Status Output at Version TLE 4240-3 only Q
TLE 4240-2 TLE 4240-3
GND
TLE4240-2_A pplication.vsd
Figure 3
Datasheet
Typical Application Circuit
3 Rev. 1.1, 2006-12-07
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TLE 4240-2/3 M
Table 2 Parameter Input I Voltage Current Output Q Voltage Current
Absolute Maximum Ratings Symbol Limit Values Min. Max. 45 – 40 – 12 – –
h t t p :
-40 °C ≤ Tj ≤ 150 °C Unit Remarks
VI II VQ IQ VST IST VESD,HBM VESD,CDM VESD,HBM VESD,CDM Tj Tstg
-16 – -1 – -0.3 – 4 2 2 2 -40 -50
V mA V mA V mA kV
– internally limited – internally limited – internally limited TLE 4240-2 M; HBM 1)
t /
Status ST (TLE 4240-3 M) Voltage Current ESD Susceptibility ESD Resistivity ESD Resistivity Temperatures Junction temperature Storage temperature 150 150 °C °C – – –
/ / w w w . D a t a S h e e t
kV
4 U . n
e
TLE 4240-2 M; CDM 2) TLE 4240-3 M; HBM 1) TLE 4240-3 M; CDM 2)
– –
kV kV
1) ESD susceptibility “human body model (HBM)” according to JESD22-A114. 2) ESD susceptibility “charged device model (CDM)” according to JESD22-C101
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. 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.
Datasheet
4
Rev. 1.1, 2006-12-07
d a t a s h e e t p d
TLE 4240-2/3 M
Table 3 Parameter Input voltage
Functional Range Symbol Limit Values Min. Max. 45 15 150 V V °C – – – 3 – -40 Unit Remarks
Status output voltage (Version TLE 4240-3 M only) Junction temperature
VI VST Tj
Table 4 Parameter
Thermal Resistance Symbol Typ. Limit Unit Values Remarks A: footprint only1) A = 300 mm 1) A = 600 mm 1) measured to pin 5
Junction ambient
Rth,j-a
179 99 87
K/W K/W K/W K/W
Junction pin 5
Rth,j-pin5
26
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1) Mounted an a PCB 80 × 80 × 1.5 mm3, horizontal position, zero airflow.
Table 5 Parameter
Electrical Characteristics Symbol Limit Values Min. Typ. Max. Unit Test Condition
VI = 13.5 V; VQ = 6 V; -40 °C ≤ Tj ≤ 150 °C; unless otherwise specified
Regulator: Output current
IQ
51 46
57 58 0.5
63 70 0.7
mA mA V
Dropout voltage Vdr = VI - VQ
Vdr
–
Tj = 100 °C 9 V ≤ VI ≤ 16 V Tj ≤ 125 °C IQ.