L9349

L9349 QUAD INTELLIGENT POWER LOW SIDE SWITCH s s s s s s s Quad power low side driver with 2 x 5A and 2 x 3A output current capability Low RDSON typically 200mΩ and 300mΩ @ Tj = 25°C Internal output clamping structures with VFB = 50V for fast inductive load current recirculation Limited output voltage slew rate for low EMI Protected µP compatible enable and input Wide operating supply voltage range 4.5V to 32V Real time diagnostic functions: – Output shorted to GND – Output shorted to VSS – Open load detection in ON and OFF condition – Load bypass detection – Overtemperature detection Device protection functions: – Overload disable – Selective thermal shutdown Signal- and Power-Ground-loss shutdown PowerSO20 BARE DIE ORDERING NUMBERS: L9349 L9349DIE1 DESCRIPTION The L9349 is a monolithic integrated quad low side driver realized in an advanced MultipowerBCD mixed technology. The device is intended to drive valves in automotive environment. The inputs are µP compatible. Particular care has been taken to protect the device against failures, to avoid electromagnetic interferences and to offer extensive real time diagnostic. s s BLOCK DIAGRAM IN1 D1 EN Channel 1 OUT1 VS 52V Output Control IN4 R Q D4 Diagnostic Control Channel 4 Openload S Delay Time Overtemp R IO OUT4 Overload IN2 D2 Channel 2 OUT2 IN3 D3 Channel 3 OUT3 00AT0025 GND September 2002 1/12 L9349 PIN CONNECTION Heat sink connected to pins 1, 10, 11, 20 PGND OUT1 D1 IN4 VS NC IN3 D2 OUT2 PGND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 PGND OUT4 D4 IN1 EN GND IN2 D3 OUT3 PGND 00AT0026 PIN DESCRIPTION N° 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Pin PGND Out1 D1 IN4 VS NC IN3 D2 Out2 PGND PGND Out3 D3 IN2 GND EN IN1 D4 Out4 PGND Power Ground Output 1 (5A) Diagnostic 1 Input 4 Supply Voltage Not Connected Input 3 Diagnostic 2 Output 2 (5A) Power Ground Power Ground Output 3 (3A) Diagnostic 3 Input 2 Signal Ground Common Enable Input 1 Diagnostic 4 Output 4 (3A) Power Ground Function 2/12 L9349 THERMAL DATA Symbol RTh j-case Parameter Thermal resistance junction to case Value 3 Unit °C/W ABSOLUTE MAXIMUM RATINGSI Symbol VS VSP Parameter DC Supply Voltage Supply Voltage Pulse (duration 9.5V IO1,2 = 2A Tj = 25°C Tj = 150°C VS > 9.5V IO3,4 = 1.3A Z-diode clamping voltage Output pull down resistor Open Load Voltage Threshold IOCL ≥ 200mA VS > 9.5V EN = 0V VIN = 1V 45 10 0.525 x VS 0.55 x VS 0.003 x VS VIN1,4/2,3 = 1V VS ≤ 16V VOc Š 4.5V VOC = output voltage of other channel VOC 1.0V VOC 1.25V VOC 1.5V 200 300 500 mΩ RDSON 3, 4 300 450 750 mΩ VZ RO VOUV 1-4 60 40 0.575 x VS 50 V kΩ V V V VOUV hys 1- Hysteresis 4 ∆VOUV 1-4, 2-3, 4-1, 3-2 Open Load Difference Voltage Threshold ∆VOUV hys Open Load Hysteresis 1-4, 2-3, 4-1, 3-2 40 mV IOUC 1, 2, 3, 4 Open Load Current Threshold Over Load Current Threshold Thermal Shut Down Thermal Shut Down hysteresis VEN=VIN=2V; VS=6.5 - 16V VS > 6.5V; VOUT = 32V 160 320 480 mA IOOC 1, 2 IOOC 3, 4 TSD TSD-hys 5 3 180 10 6 195 20 210 A A °C °C 4/12 L9349 ELECTRICAL CHARACTERISTICS (continued) (VS = 4.5 to 32V; -40°C ≤ Tj1 ≤ 150°C < Tj2 ≤ TjDIS, unless other-wise specified.) Values Tj1 Symbol IOUT-LE Parameter OUT leakage current Test Conditions Min. VOUT = 20V VS = 0V Typ. Max. 5 Min. Max. Values Tj2 Unit µA Inputs IN1-4, EN VIN,EN L VIN,EN H VEN,IN hys IIN IEN Timing tON Output Delay ON Time IO = 1A VS = 12V 3)) Logic Input/Enable Low Voltage Logic Input/Enable High Voltage Logic Input Hysteresis Input Sink Current Enable Sink Current 2V < VIN, VEN < 6V 2) VIN, VEN < Vs IN, EN -0.3 2.0 50 10 10 100 20 20 1 6 V V mV 40 40 µA µA 4 25 µs Fig. 2 3 10 30 tf,r Output fall and rise time IO = 1A VS = 12V Fig. 2 IO = 1A VS = 12V 3) µs tOFF Output Delay OFF Time 5 15 30 µs Fig. 2 Fig. 2 8 8 6 65 50 65 90 tDH-L, Diag tD IOU tDOL Diag. Delay Output OFF Time Diagnostic Open Load Delay Time Diagnostic Overload Delay Switch-OFF Time Filter time 3) µs µs µs 9V< VS 3A channel off channel on Tjtyp ≥ 190°C Overtemperature Over Load SGND or PGND loss SGND or PGND loss CIRCUIT DESCRIPTION The L9349 is a quad low side driver for inductive loads like valves in automotive environment. The internal pull down current sources at the ENable and INput pins assure in case of open input conditions that the device is switched off. An output voltage slope limitation for du/dt is implemented to reduce the EMI. An integrated active flyback voltage limitation clamps the output voltage during the flyback phase to 50 V. Each driver is protected against short circuit at V OUT < 32V and thermal overload. In short circuit condition the output will be disabled after a short delay time tDOL. The thermal disable for TJ > 180°C of the output will be reset if the junction temperature decreases about 20°C below the disable threshold temperature. The overtemperature, overload and groundloss information is stored until IN is low. For the real time error diagnosis the voltage and the current of the outputs are compared with internal fixed values VOUV for OFF and IOUC for ON conditions to recognize open load (R L ≥ 20KΩ, RL > 38Ω) in OFF and ON conditions. Also the output voltages V O1- 4 are compared to each other output in OFF condition with a fixed offset of ∆VOUV to recognize load bypasses. The ∆VOUV diagnoses is suppressed during the flyback phases of the compared output. The outputs 1 and 4 are compared for ∆VOUV and also outputs 2 and 3 are compared. The diagnostic output level in connection with different ENable and INput conditions allows to recognize different fail states, like overtemp, short to VS, short to GND, bypass to GND and disconnected load (see diagnostic table). The diagnostic output is protected against short circuit. Exceeding the over load current threshold IOOC, the output current will be limited internally during the diagnostic overload delay switch-off time tDOL. The device complies the I SO pulses imposed to the supply voltage of the valves without any failures of the functionality. Therefore some diagnostic functions are internal filtered. The following table shows the corresponding filter time for each detected signal. 6/12 L9349 ON State EN and IN = HIGH Overloading of output (also shorted load to supply) Open load (under voltage detection) Open load (under current detection) Overtemperature Power-Signal GND-loss Power- Signal-GND-loss Openload difference X X X X X X X OFF State EN or IN, = LOW min. Filter time 4µs 4µs 4µs 4µs 4µs INx = “LOW” INx = “LOW” Reset done by INx = “LOW” Figure 1. tEO Clamping Time VO1-4 VOCL VS tEO T 00AT0027 t 7/12 L9349 Figure 2. Output Slope (resistive load for testing) VIN VEN 5V VH VL t VOUT tON tOFF VS 0.85V S VOUV 0.15V S t VDIAG tf VD 0.5V D tr tD H-L Diag 00AT0030 Figure 3. Timing (tDOL, tDIOU) IN VON IOOC IOUC VD tDIOU 00AT0032 tfilt Open Load Current tDOL 8/12 L9349 Figure 4. Block Diagram - Open Load Voltage Detection VBatt L1 (L2) OUT1 (OUT2) OUT4 (OUT3) L4 (L3) IN1 RIO VS RIO IN4 55% ± + + ± Enable R Latch Q S S R Latch Q 00AT0033 VO UV1 VO UV4 9/12 L9349 Figure 5. Logic Diagram VEN VIN VO U IOO IOU VD Normal Operation ON Open Load Current Open Load Current Normal Operation ON Open Load Current Latch Reset Latched Over. Load Diagnostic Open Load Voltage 00AT0034 Figure 6. Application Circuit Diagram +5V VCC I/O I/O I/O IN1 D1 EN Channel 1 OUT1 Z VALVE VS +45V 52V Output Control I/O +5V R Q I/O D4 Diagnostic Control Channel 4 I/O I/O +5V IN2 D2 Channel 2 S Delay Time IN4 Overtemp R IO OUT4 Z VALVE VBatt KL30 KL15 Overload µP Controller +5V Openload OUT2 Z VALVE I/O I/O IN3 D3 Channel 3 OUT3 Z VALVE GND 00AT0035 GND 10/12 Open Load Voltage Normal Operation OFF L9349 mm MIN. 0.1 0 0.4 0.23 15.8 9.4 13.9 1.27 11.43 10.9 5.8 0 15.5 0.8 11.1 2.9 6.2 0.1 15.9 1.1 1.1 0.031 8˚ (typ.) 8˚ (max.) 10 0.394 0.228 0.000 0.610 0.429 TYP. MAX. 3.6 0.3 3.3 0.1 0.53 0.32 16 9.8 14.5 0.000 0.016 0.009 0.622 0.370 0.547 0.050 0.450 0.437 0.114 0.244 0.004 0.626 0.043 0.043 JEDEC MO-166 0.004 MIN. inch TYP. MAX. 0.142 0.012 0.130 0.004 0.021 0.013 0.630 0.386 0.570 Weight: 1.9gr DIM. A a1 a2 a3 b c D (1) D1 E e e3 E1 (1) E2 E3 G H h L N S T OUTLINE AND MECHANICAL DATA (1) “D and E1” do not include mold flash or protusions. - Mold flash or protusions shall not exceed 0.15mm (0.006”) - Critical dimensions: “E”, “G” and “a3”. PowerSO20 N N a2 b e A R c DETAIL B a1 E DETAIL A DETAIL A e3 H lead D a3 DETAIL B 20 11 Gage Plane 0.35 slug -C- S E2 T E1 BOTTOM VIEW L SEATING PLANE G C (COPLANARITY) E3 1 10 h x 45 PSO20MEC D1 0056635 11/12 L9349 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics © 2002 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com 12/12