L9377DIE1

® L9377 DUAL INTELLIGENT POWER LOW SIDE SWITCH DUAL POWER LOW SIDE DRIVER WITH 2 x 5A LOW RDSON TYPICALLY 200mΩ @ 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 4.5V TO 45V REAL TIME DIAGNOSTIC FUNCTIONS: - OUTPUT SHORTED TO GND - OUTPUT SHORTED TO VSS - OPEN LOAD - LOAD BYPASS DEVICE PROTECTION FUNCTIONS: - OVERLOAD DISABLE - REVERSE BATTERY UP TO -16V @ VS - THERMAL SHUTDOWN DESCRIPTION The L9377 is a monolithic integrated dual low side driver realized in an advanced MultipowerBLOCK DIAGRAM IN1 DIAG1 MULTIPOWER BCD TECHNOLOGY DIE ORDERING NUMBER: L9377DIE1 BCD mixed technology. It is especially intended to drive valves in automotive environment. 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. Channel 1 OUT1 EN VS OUT2 Output Control Overtemp R Delay Timer RO IN2 DIAG2 Q S Overload Diagnostic Control Openload Channel 2 GND July 2000 1/9 L9377 ABSOLUTE MAXIMUM RATINGS (no damage or latch) Symbol VSDC VSTR VIN,EN VDDC VODC VOTR IO IOR EO TjEO Tj Ta TjDIS DC supply voltage Transient supply voltage ( t ≤ 500ms ) Input voltage ( | ≤ | 10mA | ) Diagnostic DC output voltage ( | ≤ | 50mA | ) DC output voltage Transient output voltage ( RL ≥ 4Ω ) Output load current Reverse output current limited by load Switch-off energy for inductive loads (tEO = 250µs, T = 5ms) Junction temperature during switch-off ∑t ≤ 30min ∑t ≤ 15min Junction temperature Storage temperature Thermal disable junction temp, threshold Parameter Value -16 to 45 60 -1.5 to 6 -0.3 to 16 45 60 internal limited -4 50 175 190 -40 to +150 -55 to +150 180 to 210 A mJ °C °C °C °C °C Unit V V V V V V ELECTRICAL CHARACTERISTICS (Operating Range) - The electrical characteristics are valid within the below defined operative range, unless otherwise specified. Symbol VS VD Tj1 Tj2 Parameter Board supply voltage Stabilized diagnostic output voltage Junction Temperature Junction temperature ∑t ≤ 15min *) Test Condition Min. 4.5 -0.3 -40 150 Typ. 12 5 Max. 32 16 150 210 Unit V V °C °C *) Parameter will be guaranted by correlation Symbol ISSB IS VDL IDLE ID VOUV ∆VOUV1,2 Parameter Static standby supply current DC supply current Diagnostic ouput low voltage Diagnostic output leakage current Diagnostic output current capability Open load voltage threshold Open load difference voltage threshold Test Condition Min. b) c) VEN = L, VO ≥ VOUV b) c) VEN = VIN = H b) ID = 2mA c) ID = 1mA VS = 0V or VS = open; VD = 5.5V Tj ≤ 125°C VD ≤ 16V DIAG = L VEN = X, VIN = L b) VEN = X, VIN1,2 = L 16V ≥ VOC ≥ VOUV VOC = output voltage of other channel c) a) VEN = VIN = H c) 2 0.51 x VS VOC0.9V VOC0.7V 100 20 Value Tj1 Typ. 0.73 1.3 0.35 0.1 6 0.55 x VS VOC1.25V VOC1.25V 320 Max. 1.5 15 5 15 0.5 2 30 0.59 x VS VOC1.6V VOC1.8V 480 Value Tj2 Min. Max. Unit mA mA mA mA 0.7 20 V µA mA 0.5 x VS 0.8 0.65 x VS 1.7 V V1) V 580 mA mA IOUC Open load current threshold 2/9 L9377 ELECTRICAL CHARACTERISTICS (continued) Symbol IOOC VOCL SON,OFF RIO RDSON Parameter Over load current threshold Output voltage during clamping Output (fall, rise) slew rate Internal output pull down resistor Output on resistance b) IOCL ≥ 100mA a) Fig. 2 VEN = L VS > 9.5V IO = 2A Tj = 25°C; Tj = 150°C |IEN, IN| ≤ 10mA -1.5 2 0.2 1V ≤ VEN ≤ 5.5V 1V ≤ VIN ≤ 5.5V Fig. 2 5 5 Fig. 4 Fig. 1 50 8 160 10 40 0.4 30 95 4 15 Test Condition Min. 5 45 200 10 Value Tj1 Typ. 7 52 1500 20 60 3200 40 200 3500 50 Max. Value Tj2 Min. Max. 4 Unit A V V/rms KΩ mΩ mΩ 0.8 V V V 80 240 µA µA µs µs 90 µs µs µs 200 300 500 1 5.5 0.8 60 180 25 30 65 50 300 V(EN,IN)L V(EN,IN)H V(EN,IN)hys IEN IIN tD ON tD OFF tD H-L, Diag. tD IOu tDOL Logic input low voltage Logic input high voltage Logic input hysteresis Enable input sink current Logic input sink current Output delay ON time Output delay OFF time Diag. delay output OFF time Diagnostic open load delay time Diagnostic overload delay switch-off time a) 9V ≤ VS ≤ 16V (Nominal operating range) RL ≤ 6Ω, IO ≤ IOOC b) 6.5V ≤ VS ≤ 16V (Diagnostic operation range) c) 4.5V ≤ VS < 6.5V and 16V < VS ≤ 32V (Extended operation range) 1) Limit under evaluation. 3/9 L9377 DIAGNOSTIC TABLE (Operating range: 4.5V ≤ VS ≤ 32V) Conditions Normal function EN L H H VOtyp < 0.55V VO1,2 ≥ 1.25V IOtyp < 320mA L H H X X X X IN X L H X L H L H H Out off off on (*) off off on (*) off off off D.C. Diag. L L H H H L H L L D.C. GND short Load bypass Open load Tj typ ≥ 175°C Overtemperature (**) Latched Over load IOmin > 5A Reset over load latch (*) for 4.5V ≤ VS < 6.5V, IO ≤ 2A diag. table is valid. (**) If one diag. status shows the overtemp. recognition, in parallel this output will be switched OFF internally. The corresponding channel should be switched OFF additional by its Input or ENABLE signal, otherwise the overload latch will be set after tDOL is passed. This behaviour will be related to the overdrop sensing which will be used as over load recognition. Figure 1: Diagnostic overload delay time UI 5V t IO IO SC 5A IO UC td OL t UD 5V t 4/9 L9377 Figure 2: Output slope. U IN 5V V (IN)H V (IN)L td on U OUT td off t VO C 0.85VO C VS VS-VO C C 0.85VS VO UV 0.15VS Soff Son t V DIAG VD 0.5V D tD t H-L Diag 5/9 L9377 Figure 3: Block diagram - Open load voltage detection. VBatt. L1 OUT1 OUT2 L2 IN1 R IO R IO IN2 VS 55% - + + - Enable & R & S R S Latch Q Latch Q & VO UV1 & VO UV2 6/9 Figure 4: Logic diagram. V EN V IN VO u IO o td on td on td off IO u VD latched over. load diagnostic open load current open load current open load voltage td IO td OL over load current latch reset normal operation OFF td IO u normal operation ON open load current u normal operation ON normal operation OFF open load voltage L9377 7/9 L9377 CIRCUIT DESCRIPTION The L9377 is a dual low side driver for inductive loads like valves in automotive environment. The device is enabled by a common CMOS compatible ENABLE high signal. The internal pull down current sources 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 and thermal overload. In short circuit condition the output will be disabled after a short delay time tDOL to suppress spikes. This disable is latched until a negative slope occure at the correspondent input pin. The thermal disable for TJ > 175°C of the output will be reseted if the junction temperature decreases about 20°C below the disable threshold temperature. 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 (RL ≥ 20KΩ, RL > 38Ω) in ON and OFF conditions. The diagnostic Figure 5: Application circuit diagram. operates also in the extended supply voltage range of 4.5V ≤ VS ≤ 32V. Also the output voltages VO1,2 are compared against each other in OFF condition with a fixed offset of ∆VOUV 1,2 to recognize GND bypasses. To suppress mail ∆VO diagnoses during the flyback phases of the compared output, the ∆VO diagnostic includes a latch function. Reaching the flyback clamping voltage VOC the diagnostic signal is reseted by a latch. To activate again this kind of diagnostic a low signal at the correspondent INPUT or the ENABLE pin must occur (see also Fig.3). The diagnostic output level in connection with different ENABLE and INPUT conditions allows to recognize different fail states, like overtemp, short to VSS, short to GND, bypass to GND and disconnected load (see also page 7 diagnostic table). The diagnostic output is also protected against short to UDmax. Oversteping the over load current threshold IOo, the output current will be limited internally during the diagnostic overload delay switch-off time tDOL. +5V IN1 Z VALVE Channel 1 DIAG1 OUT1 EN VS µP Controller IN2 R QS DIAG2 Diagnostic Control Openload Delay Timer Output Control Overtemp OUT2 RO Z VALVE V Batt Overload Channel 2 GND 8/9 L9377 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. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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