L9326 DUAL INTELLIGENT POWER LOW SIDE SWITCH PRODUCT PREVIEW DUAL POWER LOW SIDE DRIVER WITH LOW RDSON TYPICALLY 250mΩ (TJ = 25°C) INTERNAL OUTPUT CLAMPING DIODES VFB = 50V FOR INDUCTIVE RECIRCULATION LIMITED OUTPUT VOLTAGE SLEW RATE FOR LOW EMI µP COMPATIBLE ENABLE AND INPUT WIDE OPERATING SUPPLY VOLTAGE RANGE 6.5V TO 40V REAL TIME DIAGNOSTIC FUNCTIONS: - OUTPUT SHORTED TO GND - OUTPUT SHORTED TO VSS - OPEN LOAD - OVERTEMPERATURE DEVICE PROTECTION FUNCTIONS - OVERLOAD DISABLE - THERMAL SHUTDOWN DESCRIPTION The L9326 is a monolithic integrated dual low side driver realized in an advanced Multipower- MULTIPOWER BCD TECHNOLOGY SO24 (16+4+4) ORDERING NUMBER: L9326 BCD mixed technology. It is especially intended to drive valves in automotive enviroment. Its inputs are µP compatible for easy driving. Particular care has been taken to protect the device against failures, to avoid electro-magnetic interferences and to offer extensive real time diagnostic. BLOCK DIAGRAM October 1992 1/8 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. L9326 ABSOLUTE MAXIMUM RATINGS Symbol VSDC Parameter DC Supply Voltage Transient Supply Voltage t ≤ 500ms Value Unit – 1.5 to 40 V 60 V VIN,EN Input Voltage |10mA| – 1.5 to 6 V IO Output Load Current internal limited VSTR VODC DC Output Voltage 45 V VOTR Transient Output Voltage RL ≥ 4Ω 60 V IOR Reverse Output Current (limited by load) –4 A UDDC Diagnostic DC Output Voltage EO Switch-off energy tEO = 250ms, t = 5ms TjEO Junction Temperature during Switch-off – 0.3 to 20 V 50 mJ 175 °C Tj Junction Temperature – 40 to +150 °C Tstg Storage Temperature – 55 to +150 °C Value Unit 160 to 190 °C PIN CONNECTION (Top view) THERMAL DATA Symbol TjDIS 2/8 Parameter Thermal Disable Junction Temperature Threshold L9326 ELECTRICAL CHARACTERISTICS (Operating range: 6.5V < VS ≤ 32V (45V for t ≤ 500ms), – 40°C ≤ TJ ≤ 150°C unless otherwise specified). Symbol Parameter Test Condition IO u Open Load Current VEN = VIN = H VOu Open Load Voltage VEN = H, VEN = L IO O Over Load Current Threshold Tj ≤ 150°C Typ. Max. Unit 2.5 125 250 mA 0.525VS 0.55VS 0.575VS Internal Output Pull Down VEN = L V(EN,IN)L Logic Input Low Voltage VS > 4.5V V(EN,IN)H Logic Input High Voltage V(EN,IN)hys RO Min. 5 14 IEN,IN ≤ 10mA A 20 36 kΩ – 1.5 1 V VS > 4.5V 2 5.5 V Logic Input Hysteresis VS > 4.5V 0.2 IEN Logic Input Sink Current VS > 4.5V 0.5V ≤ VEN ≤ 5.5V 21 30 39 µA IIN Logic Input Sink Current VS > 4.5V 0.5V ≤ VIN ≤ 5.5V 70 100 130 µA Output on Resistance Tj = 150°C VS > 9.5V IO = 2A 400 500 mΩ 52 60 V R DSON VOC Output Voltage During Clamping 45 0.4 V Static Standby Supply Current VEN = L 0.4 1 mA DC Supply Current VEN = VIN = H 0.4 5 mA VD L Diagnostic Output Low Voltage IO = 2mA VS ≥ 4.5V 0.5 V IDLE Diagnostic Output Leakage Current VS = 0 or VS = Open; VD = 5.5V Tj ≤ 125°C 10 µA ID Diagnostic Output Current Capability VD ≤ 20V DIAG = L tDOL Diagnostic Overload Delay Switch-off time Fig. 1 IO > IOo 50 100 200 µs SON,OFF Output (fall,rise) slew rate Fig. 2 RL = 6Ω 1000 1500 2000 V/ms 12.5 µs ISSB IS 0.1 4 Fig.2 tD ON tD OFF Output Delay Time 9V ≤ VS ≤ 16V tD IOu Open Load Diagnostic Delay Time R L ≤ 6Ω 7.5 mA 27.5 µs 35 µs DIAGNOSTIC TABLE Operating Range: 6.5V < VS ≤ 32V (45V for t ≤ 500ms), – 40°C ≤ TJ ≤ 150°C Conditions EN IN Out Diag Normal Function L H H X L H OFF OFF ON (*) L L H Over Load IO > 5A X X OFF L 160°C < Tj ≤ 190°C Overtemperature X X L H OFF OFF H L Open Load VO < 0.6V IO < 250mA X L H L H H OFF OFF ON (*) H H L Reset Over Load Latch X D.C. D.C. (*) For VS < 6.5V, Out = Undefined 3/8 L9326 Figure 1: Diagnostic Overload Delay Time Figure 2: Output Slope 4/8 L9326 Figure 3: Application Circuit Diagram CIRCUIT DESCRIPTION The L9326 is a dual low side driver for inductive loads like valves in automotive enviroment. The device is enabled by a common CMOS compatible ENABLE high signal. The internal pull down resistances at the ENABLE and INPUT pins protect the device in open input conditions against malfunctions. An output 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 50V. Each driver is protected against short circuit condition 1) the output will be disabled after a short delay time tDOL to suppress spikes 2). This disable is latched until a negative slope occure at the correspondent input pin. The Thermal disable of the output will be reseted if the junction tempera- ture decreases below 160°C. For the real time error diagnosis the voltage and the current of the output is compared with internal fixed values VOu and IOu to recognize open load (RL ≥ 20 KΩ) in ON anf OFF conditions. The diagnostic output level in connection with different ENABLE and INPUT conditions allows to recognize four different fail states, under voltage, over load, overtemp and open load. The diagnostic output is also protected against short circuit up to UDmax. 1) overstepeing the over load current thereshold IOo. 2) During the diagnostic overload delay switch-off time tDOL the output current will be limited only by the RDSON of the output. 5/8 L9326 Figure 4: Logic Diagram. 6/8 L9326 SO24 PACKAGE MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. MIN. TYP. MAX. A 2.35 2.65 0.093 0.104 A1 0.10 0.30 0.004 0.012 A2 2.55 0.100 B 0.33 0.51 0.013 0.0200 C 0.23 0.32 0.009 0.013 D 15.20 15.60 0.598 0.614 E 7.40 7.60 0.291 0.299 e 1.27 0,050 H 10.0 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 k 0° (min.), 8° (max.) L 0.40 1.27 0.016 0.050 0.10mm B e A A2 h x 45° A1 K A1 L .004 C H Seating Plane D 13 1 12 E 24 SO24 7/8 L9326 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. 8/8