TLE4241GM INFINEON | Alldatasheet
Document overview
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Technical content
Features
- Adjustable constant output current Wide input voltage range Low drop voltage Open load detection Overtemperature protection Short circuit proof Reverse polarity proof Wide temperature range: -40°C < Tj < 150°C Very small SMD-Package Functional Description The TLE 4241 GM is an integrated adjustable constant current source. It provides an output current adjustable via different means (SET, PWM, reference resistor) which is kept nearly independent from load and supply voltage changes. The IC is designed to supply LEDs under the severe conditions of automotive applications resulting in constant brightness and extended LED lifetime. It is provided in the very small P-DSO-8-9 (Micro 8) package. Protection circuits prevent damage to the device in case of overload, short circuit, reverse polarity and overtemperature. The connected LEDs are protected against reverse polarity as well as excess voltages up to 45 V. A status output allows handling of open load and short circuit at the main output. A PWM input offers the possibility to adjust the LED brightness by pulse width modulation. With an implemented high/low current switch the output current level can be reduced e.g. for brake/tail light application. The implemented features such as adjustable output current, the high/low current switch and the provided PWM input make the device well suited for a broad range of LED and other applications.
Data Sheet 2 Rev. 1.2, 2004-04-13 TLE 4241 GM Circuit Description Figure 1 Block Diagram An internal reference voltage of typ. 1.20V supplies the REF pin which is connected to GND via an external resistor. In the SET = H mode the reference current flowing on the REF pin is mirrored with an amplification to form the desired output current. The typ. output current in the SET = H mode calculates: (1) The output current is shown as a function of the reference resistance on Page 10 for the high as well as for the low current mode. With the PWM input the LED brightness can be regulated via duty cycle. Also PWM = L sets the TLE 4241 in sleep mode resulting in a very low current consumption of << 1µA typ. Due to the high impedance of the PWM input (see timing diagram IPWM versus VPWM on Page 12) the PWM pin can thus also be used as an Enable input. AEB03003 Regulation High Regulation Low Reference Voltage Status Control V/I Converter Q REF SET PWM ST I GND IQt y p, /mA 1.20
Data Sheet 3 Rev. 1.2, 2004-04-13 Figure 2 Pin Configuration (top view) Table 1 Pin Definitions and Functions Pin No. Symbol Function 1G N D Ground; internally connected to pin 5 2S T Status Output; open collector output, connect to external pull-up resistor (10 kΩ or higher) 3P W M Pulse Width Modulation Input; if not needed connect to VI
4 SET High/Low Current Input; choice of current level
5G N D Ground; internally connected to pin 1 6R E F Reference Input; connect to GND via an external resistor to adjust the output current 7Q Output 8I Input; block to GND directly at the IC with a 100 nF ceramic capacitor AEP03002 81GND I ST 2 7 PWM 3 6 SET 4 5 Q REF GND
Data Sheet 5 Rev. 1.2, 2004-04-13 Figure 4 Function and Timing Diagram Open Load AET03339.VSD VI t VPWM VPWM, H t VPWM, L VSET VSET, H t VSET, L mA IQ t VST t VSTL tSET, H tSET, L tPWM, ON tPWM, OFF
Data Sheet 6 Rev. 1.2, 2004-04-13 TLE 4241 GM Note: Maximum ratings are absolute ratings; exceeding any one of these values may cause irreversible damage to the integrated circuit. Table 2 Absolute Maximum Ratings -40 °C < Tj < 150 °C Parameter Symbol Limit Values Unit Remarks Min. Max. Input Voltage VI -42 45 V – Current II – – mA internally limited Output Voltage VQ -1 40 V – Current IQ – – mA internally limited Status Output Voltage VST -0.3 40 V – Current IST – 5 5 mA internally limited Reference Input Voltage VREF -0.3 7 V – Current IREF -2 2 mA – Pulse Width Modulation Input Voltage VPWM -40 40 V – Current – -1 1 mA – High/Low Current Input Voltage VSET -40 40 V – Current ISET -1 1 mA – Temperatures Junction temperature Tj -40 150 °C– Storage temperature Tstg -50 150 °C– Thermal Resistances Junction ambient Rthja – 105 K/W 1) 1) Worst case regarding peak temperature; mounted on PCB 80 × 80 × 1.5 mm3, 35 µm Cu, 300 mm2 heat sink area.
Data Sheet 7 Rev. 1.2, 2004-04-13 Table 3 Operating Range Parameter Symbol Limit Values Unit Remarks Min. Max. Input voltage VI 44 5 V – Status output voltage VST –1 6 V – SET voltage VSET 04 0 V – PWM voltage VPWM 04 0 V – Junction temperature Tj -40 150 °C– Reference Resistor RREF 71 0 0 k Ω SET = H 4.7 18 k Ω SET = L
Data Sheet 8 Rev. 1.2, 2004-04-13 TLE 4241 GM Table 4 Electrical Characteristics 9V ≤ VI ≤ 16 V; RREF = 10 kΩ; VPWM ≥ VPWM,H ; -40°C < Tj < 150°C; all voltages with respect to ground; positive current defined flowing into pin; unless otherwise specified Parameter Symbol Limit Values Unit Test Condition Min. Typ. Max. Current consumption off mode IqOFF –0 . 1 2 µA PWM = L, TJ < 85°C; VI ≤ 13.5 V Current consumption IqL – 5 10 mA SET = L; VQ = 6 V Current consumption IqH – 6 10 mA SET = H; VQ = 6 V Current consumption open load IqL,O – – 10 mA SET = L; VQ open Current consumption open load IqH,O – – 10 mA SET = H; VQ open Output Output current IQ 6.7 8.4 10 mA SET = L, VQ = 6 V –8 . 6 –m A S E T = L , VQ = 4 V Output current IQ 47 58.5 70 mA SET = H, VQ = 6 V – 60.0 – mA SET = H, VQ = 4 V Current Ratio IQH /IQL 678– – Output current limit IQmax – 83 – mA SET = L; RREF = 0Ω Output current limit IQmax – 83 – mA SET = H; RREF = 0Ω Drop voltage Vdr – 0.2 0.5 V SET = L; IQ = 80% of IQ,nom,L Drop voltage Vdr – 0.3 0.5 V SET = H; IQ = 80% of IQ,nom,H PWM Input PWM high level VPWM,H 2.0 – – V – PWM low level VPWM,L ––0 . 5 V – PWM input current high level IPWM,H – 220 500 µA VPWM = 5.0 V PWM input current low level IPWM,L -10 – 10 µA VPWM = 0.0 V Turn on delay time tPWM,ON 053 0 µs 20%/80% IQ , see Figure 4
Data Sheet 10 Rev. 1.2, 2004-04-13 TLE 4241 GM Typical Performance Characteristics Output Current versus External Resistor, SET = H Output Current versus Supply Voltage, SET = H Output Current versus External Resistor, SET = L Output Current versus Supply Voltage, SET = L AED03333.VSD RREF IQ 100 10 20 50 100 kΩ mA SET = H VQ = 6 V AED03335.VSD VI 100 5 1 01 52 02 53 0 4 0 VQ = 6 V RREF = 10 kΩ SET = H mAIQ AED03334.VSD RREF IQ 10 20 50 100 kΩ mA SET = L VQ = 6 V AED03336.VSD VI 5 1 01 52 02 53 0 4 0 VQ = 6 V RREF = 10 kΩ SET = L mAIQ
Data Sheet 11 Rev. 1.2, 2004-04-13 TLE 4241 GM Reference Voltage versus Junction Temperature AED03340.VSD -40 Tj 0 40 80 °C 1601.15 1.19 1.21 1.23 1.25 1.17 V VREF RREF = 10 kΩ
Data Sheet 12 Rev. 1.2, 2004-04-13 TLE 4241 GM PWM Pin Input Current versus PWM Voltage SET Pin Input Current versus SET Voltage PWM Pin Input Current versus PWM Voltage SET Pin Input Current versus SET Voltage AED03332.VSD VPWM 5 1 01 52 02 53 0 V 4 00 0.5 1.0 1.5 2.0 mAIPWM AED03338.VSD VSET 0.5 1.0 1.5 2.0 2.5 5 1 01 52 02 53 0 4 0 mAISET AED03331.VSD VPWM
123456 V 80
µAIPWM AED03337.VSD VSET µAISET
Data Sheet 13 Rev. 1.2, 2004-04-13 Package Outlines Figure 5 P-DSO-8-9 (Plastic Dual Small Outline) Does not include plastic or metal protrusion of 0.15 max. per side -0.05 -0.2 +0.1 0.41 Index Marking (Chamfer) 1.27 A 0.1 0.2M A (1.5) 0.1 MIN. 1.75 MAX. C C 6±0.2 0.64 0.33 4 -0.2 -0.01 0.2 +0.05 x 45˚±0.08 ±0.25 MAX.8˚ Index Marking GPS09032 Y ou can find all of our packages, sorts of packing and others in our Infineon Internet Page “Products”: http://www.infineon.com/products. Dimensions in mmSMD = Surface Mounted Device
Revision History
Data Sheet 14 Rev. 1.2, 2004-04-13 Version Date Changes Rev. 1.2 2004-04-13 Page 4, 9: Improved indication and explanation of the open load detection function.
Published by Infineon Technologies AG, St.-Martin-Strasse 53,
81669 München, Germany
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