TLE4242EJXUMA1

Infineon® LITIX™ Linear 1 Channel High Side Current Source up to 500mA TLE4242EJ Infineon® LITIX™ Linear 1 Channel High Side Current Source up to 500mA Datasheet Rev. 1.10 2018-05-22 Automotive Power Infineon® LITIX™ Linear TLE4242EJ Table of Contents Table of Contents Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 3.1 3.2 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 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 5.2 5.3 5.3.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Output Current Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Protection Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Typical Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6 6.1 Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Further Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Datasheet 2 6 6 7 7 Rev. 1.10 2018-05-22 TLE4242EJ 1 Infineon® LITIX™ Linear Overview Features • Adjustable constant current up to 500 mA • Wide input voltage range up to 42 V • Low drop voltage • Open load detection • Over temperature protection • Over load protection • Integrated reverse polarity protection • Wide temperature range -40 °C to 150 °C • Green Product (RoHS compliant) • AEC Qualified PG-DSO-8-27 Description The TLE4242EJ is an integrated adjustable constant current source driving loads up to 500 mA. The output current level can be adjusted via an external resistor. The IC is designed to supply high power LEDs under the severe conditions of automotive applications resulting in constant brightness and extended LED lifetime. It is provided in the surface mounted PG-DSO-8-27 package. Protection circuits prevent damage to the device in case of over load, short circuit, reverse polarity and overheat. The connected LEDs are protected against reverse polarity as well as over voltages up to 45 V. The integrated PWM input of the TLE4242EJ permits LED brightness regulation by pulse width modulation. Due to the high input impedance of the PWM input the LED driver can be operated as a protected high side switch. Table 1 Product Summary Parameter Symbol Values Operating voltage VI(nom) 4.5 V … 42 V Maximum output voltage VQ(max) 40 V Nominal output (load) current IQ(nom) 135 mA Minimum current limitation IQ(lim,min) 476 mA Current consumption in off mode II(off,typ) 0.1 µA Type Package Marking TLE4242EJ PG-DSO-8-27 TLE4242 Datasheet 3 Rev. 1.10, 2018-05-22 Infineon® LITIX™ Linear TLE4242EJ Block Diagram 2 Block Diagram I PWM 6 8 1 Q Bias Supp ly 4 Ban dgap Reference REF Comparator 2 ST Status Delay 3 GND Figure 2-1 Datasheet 5 D AEB03500.VSD Block Diagram 4 Rev. 1.10 2018-05-22 Infineon® LITIX™ Linear TLE4242EJ Pin Configuration 3 Pin Configuration 3.1 Pin Assignment (top view) PWM ST GND REF Figure 3-1 3.2 1 8 2 9 3 GND 7 4 5 6 I n.c. Q D Pin Configuration Pin Definitions and Functions Pin Symbol Input/ Output Function 1 PWM I Pulse Width Modulation Input; if not required, connect to I-pin1) 2 ST O Status Output; open collector output, connect to external pull-up resistor 3 GND – 2) 4 REF I Reference Input; connect to shunt resistor 5 D O Status Delay; optional, connect to GND via an optional capacitor to extend the status reaction time. Leave open, if no delay is required. 6 Q O Output 8 I I Input; battery supply, connect a decoupling ceramic capacitor of at least 100 nF directly at the IC to ground 9 GND – 2) Ground Exposed Pad; connect to GND in application 1) Please take care of different maximum ratings of I- and PWM-pins during circuit design. 2) Connect all GND-pins together. Datasheet 5 Rev. 1.10 2018-05-22 Infineon® LITIX™ Linear TLE4242EJ General Product Characteristics 4 General Product Characteristics 4.1 Absolute Maximum Ratings Table 4-1 Absolute Maximum Ratings1) Tj = -40°C to +150°C; all voltages with respect to ground, positive current flowing into pin for input pins, positive currents flowing out of pin for output pins (unless otherwise specified) Parameter Symbol Values Min. Typ. Max. Unit Note or Test Condition Number Voltages Input voltage VI -42 – 45 V – P_4.1.1 Output voltage VQ -1 – 40 V – P_4.1.2 Status output voltage VST -0.3 – 40 V – P_4.1.3 Status delay voltage VD -0.3 – 7 V – P_4.1.4 Reference input voltage VREF -1 – 16 V – P_4.1.5 PWM input voltage VPWM -40 – 40 V – P_4.1.6 Input current II – – – A internally limited P_4.1.7 Output current IQ – – – A internally limited P_4.1.8 Status output current IST -5 – 5 mA – P_4.1.9 Status delay current ID -1 – 1 mA in off-state 10 min P_4.1.17 Reference input current IREF -2 – 2 mA – P_4.1.10 PWM input current IPWM -1 – 1 mA – P_4.1.11 Junction Temperature Tj -40 – 150 °C – P_4.1.12 Storage Temperature Tstg -55 – 150 °C – P_4.1.13 VESD -2 – 2 kV HBM2) P_4.1.14 3) P_4.1.15 3) P_4.1.16 Currents Temperatures ESD Susceptibility ESD Susceptibility ESD Susceptibility VESD ESD Susceptibility Pin 1, 4, 5, 8 VESD1,4,5,8 (corner pins) to GND -500 -750 – – 500 750 V V CDM CDM 1) Not subject to production test, specified by design. 2) ESD susceptibility, HBM according to ANSI/ESDA/JEDEC JS001 (1.5k Ω, 100 pF) 3) ESD susceptibility, Charged Device Model “CDM” ESDA STM5.3.1 or ANSI/ESD S.5.3.1 Datasheet 6 Rev. 1.10 2018-05-22 Infineon® LITIX™ Linear TLE4242EJ General Product Characteristics Notes 1. 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. 2. 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. 4.2 Functional Range Table 4-2 Functional Range Parameter Symbol Values Min. Typ. Max. Unit Note or Test Condition Number Input voltage range VI 4.5 – 42 V – P_4.1.1 Status output voltage VST – – 16 V – P_4.1.3 Status delay capacitance CD 0 – 2.2 µF – P_4.1.4 PWM voltage VPWM 0 – 40 V – P_4.1.6 Reference resistor RREF 0 – 1.8 Ω – P_4.1.10 Junction Temperature Tj -40 – 150 °C – P_4.1.12 Note: Within the functional or operating range, the IC operates as described in the circuit description. The electrical characteristics are specified within the conditions given in the Electrical Characteristics table. 4.3 Thermal Resistance Note: This thermal data was generated in accordance with JEDEC JESD51 standards. For more information, go to www.jedec.org. Table 4-3 Thermal Resistance Parameter Symbol 1) Junction to Case Junction to Ambient RthJC RthJA Values Min. Typ. Max. – 8 10 – 39 – Unit Note or Test Condition Number K/W – P_4.3.1 K/W 2) Ta = 85 °C P_4.3.2 1) Not subject to production test, specified by design. 2) Specified RthJA value is according to Jedec JESD51-2,-5,-7 at natural convection on FR4 2s2p board; The Product (Chip + Package) was simulated on a 76.2 × 114.3 × 1.5 mm board with 2 inner copper layers (2 × 70 mm Cu, 2 × 35 mm Cu). Where applicable a thermal via array under the exposed pad contacted the first inner copper layer. Datasheet 7 Rev. 1.10 2018-05-22 Infineon® LITIX™ Linear TLE4242EJ Product Description 5 Product Description The TLE4242EJ is an adjustable constant current source providing currents up to 500 mA. The product is optimized for automotive applications, but is suitable for industrial applications as well, where high currents are required. 5.1 Output Current Setting An external shunt resistor in the ground path of the connected LEDs is used to sense the LED current. A regulation loop regulates the voltage drop at the shunt resistor RREF on a constant level of typ. 175 mV. Selecting the appropriate shunt resistance allows to adjust the desired constant current level. The typical output current is calculated according to Equation (5.1). V REF I Q  typ  = ------------R REF (5.1) VREF is the reference voltage with a typical value of 175 mV, details at Reference voltage. The equation applies in a range of 0.39 Ω ≤ RREF ≤ 1.8 Ω. The output current is shown as a function of the reference resistance in Chapter 5.3.1. With the PWM input the LED brightness can be regulated via duty cycle. Also PWM = 0 V sets the TLE4242EJ in sleep mode resulting in a very low current consumption II(off) Current consumption at Input-pin during off-state. Due to the high impedance of the PWM input the PWM pin can also be used as an enable input. The application example in Figure 6-1 shows a typical application with the TLE4242EJ LED driver. The three LEDs are driven with an adequate supply current adjusted by the resistor RREF. Thus brightness variations due to forward voltage spread of the LEDs are prevented. The luminosity spread arising from the LED production process can be compensated via software by an appropriate duty cycle applied to the PWM pin. Therefore, selection of the LEDs to forward voltage as well as to luminosity classes can be spared. The minimum supply voltage for the application is the sum of the LED forward voltages, the TLE4242EJ drop voltage Minimum drop voltage Vdr = VI - VQ and the max. voltage drop at the shunt resistor RREF of VREF(max) according to Reference voltage. The status output of the LED driver (ST) detects an open load condition enabling to supervise correct LED function. A LED failure is detected, if the voltage drop at the shunt resistor RREF falls below typ. 25 mV. In this case the status output pin ST is set low after a delay time, which is adjustable via an optional capacitor connected to the pin D. The functionality of the status ST and PWM-pin as well as their timings are shown in Figure 5-1. The pull up resistor value at the ST-pin is recommended with RST_pu ≥ 4.7 kΩ. The status delay can be adjusted via the capacitor connected to the timing pin D. The delay time tST(HL) and tST(LH) scales linearly with the capacitance CD: CD -  10ms t ST  HL typ  = ------------ (5.2) CD -  10s t ST  LH typ  = ------------ (5.3) 47nF 47nF Datasheet 8 Rev. 1.10 2018-05-22 Infineon® LITIX™ Linear TLE4242EJ Product Description VI Open Load t VPWM VPWM(H) VPWM(L) tPWM(on) IQ t tPWM(off) tST(H VD t L) VD(H) * VD(L) * t VST VST(L) t * Parameters for internal use only Figure 5-1 5.2 Function and Timing Diagram Protection Functions The TLE4242EJ provides embedded protection functions, which 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 neither designed for continuous nor for repetitive operation. The following protection functions are embedded: • Over temperature protection realized by over temperature switch off (see Figure 5-2) • Over load protection realized by output current limitation and over temperature protection • Integrated reverse polarity protection Datasheet 9 Rev. 1.10 2018-05-22 Infineon® LITIX™ Linear TLE4242EJ Product Description IQ IQ(n o m) Tj Tj( OT) Figure 5-2 5.3 Table 5-1 Over Temperature Protection Electrical Characteristics Electrical Characteristics Vl = 13.5 V, RREF = 0.47 Ω, VPWM = 5.0 V, Tj = -40°C to +150°C, all voltages with respect to ground, positive current flowing into pin for input pins, positive currents flowing out of pin for output pins (unless otherwise specified) Parameter Symbol Current consumption at Input- II(off) pin during off-state Values Min. Typ. Max. – 0.1 2 Unit Note or Test Condition µA 1) V Number Tj = 85 °CVPWM = 0.0 P_5.3.1 Iop(on) – 12 22 mA VQ = 6.6 V P_5.3.2 Output current IQ 350 373 395 mA 2) P_5.3.3 Output current IQ 165 175 185 mA VQ - VREF = 6.6 V, RREF = P_5.3.4 1.0 Ω Output current IQ 425 451 476 mA VQ - VREF = 6.6 V, RREF = P_5.3.5 0.39 Ω Output current IQ 357 384 410 mA 5.4 V ≤ (VQ - VREF) ≤ 7.8 P_5.3.6 V;9 V ≤ VI ≤ 16 V Output current limit IQ(lim) 476 600 – mA RREF = 0 Ω P_5.3.7 Minimum drop voltage Vdr = VI - VQ Vdr – 0.35 0.7 V IQ = 300 mA P_5.3.8 VPWM(H) 2.6 – – V – P_5.3.9 Operational current consumption in on-state Iop = II - IQ Output VQ- VREF = 6.6 V PWM Input PWM high level Datasheet 10 Rev. 1.10 2018-05-22 Infineon® LITIX™ Linear TLE4242EJ Product Description Table 5-1 Electrical Characteristics (continued) Vl = 13.5 V, RREF = 0.47 Ω, VPWM = 5.0 V, Tj = -40°C to +150°C, all voltages with respect to ground, positive current flowing into pin for input pins, positive currents flowing out of pin for output pins (unless otherwise specified) Parameter Symbol Values Min. Typ. Max. Unit Note or Test Condition Number PWM low level VPWM(L) – – 0.7 V – P_5.3.10 PWM input current high level IPWM(H) – – 10 µA VPWM = 5.0 V P_5.3.11 PWM input current low level IPWM(L) -1 – 1 µA VPWM = 0.0 V P_5.3.12 Turn on delay time tPWM(on) 0 15 40 µs 70% of VREF/RREF, see Figure 5-1 P_5.3.13 Turn off delay time tPWM(off) 0 15 40 µs 30% of VREF/RREF, see Figure 5-1 P_5.3.14 Reference voltage VREF 165 175 185 mV 0.39 Ω ≤ RREF ≤ 1.0 Ω P_5.3.15 VQ - VREF = 6.6 V Reference input current IREF -1 0.1 1 µA VREF = 180 mV P_5.3.16 Lower status switching threshold VIQ(L) 15 25 – mV – P_5.3.17 Upper status switching threshold VIQ(H) – 30 40 mV – P_5.3.18 Status low voltage VST(L) – – 0.4 V IST = 1.5 mA P_5.3.19 Leakage current IST(leak) – – 5 µA VST = 5.0 V P_5.3.20 tST(HL) 6 10 14 ms 1) CD = 47 nFST H → L P_5.3.21 CD = 47 nFST L → H Reference Status Output Status Delay Status reaction delay tST(LH) – 10 20 µs 1) Over temperature protection threshold Tj(OT) 150 – – °C 1) P_5.3.23 Reverse output current -IQ(rev) – – 2 µA 1) P_5.3.27 Status release delay P_5.3.22 Protection VI = -16 V Output load: LED with break down voltage < -0.6 V 1) Not subject to production test, specified by design 2) VQ - VREF equals the forward voltage sum of the connected LEDs, see Figure 6-1 Datasheet 11 Rev. 1.10 2018-05-22 Infineon® LITIX™ Linear TLE4242EJ Product Description 5.3.1 Typical Performance Characteristics Data below show the behavior of a typical device. IQ=f(RREF) 700 600 IQ [mA] 500 400 300 200 100 0 0 Figure 5-3 0,5 1 RREF [Ω] 1,5 2 Output Current IQ versus Reference Resistor RREF with VQ = 6.6 V IQ=f(VI) 180 IQ [mA] 175 170 165 160 0 5 10 15 20 VI [Ω] 25 30 35 40 Figure 5-4 Output Current IQ versus Supply Voltage VI with VQ - VREF = 6.6 V and RREF = 1 Ω Datasheet 12 Rev. 1.10 2018-05-22 Infineon® LITIX™ Linear TLE4242EJ Product Description VREF [mV] VREF=f(Tj) 190 188 186 184 182 180 178 176 174 172 170 -50 Figure 5-5 0 50 Tj [°C] 100 150 Reference Voltage VREF versus Junction Temperature Tj IPWM=f(VPWM) 50 IPWM [µA] 40 30 20 10 0 0 5 10 15 20 VPWM [V] 25 30 35 40 Figure 5-6 PWM Pin Input Current IPWM versus PWM Voltage VPWM at Tj = 25°C and VI = 13.5 V Datasheet 13 Rev. 1.10 2018-05-22 Infineon® LITIX™ Linear TLE4242EJ Application Information 6 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. 5V 10 k VBAT ST PWM I Q