"ST's l9960 is an integrated H-bridge for resistive or inductive loads of automotive electronic throttle control actuator (etc) or exhaust gas recirculation control valve (EGR), including flywheel diode. In the flywheel state, only the low side of the parallel diode can be switched to reduce power consumption. Its integrated serial peripheral interface (SPI) can adjust device parameters to control all working modes and read diagnostic information. This paper introduces the main characteristics, block diagram and application block diagram of l9960, as well as the main characteristics, circuit diagram and PCB design diagram of eval-l9960 / l9960t.
The device is an integrated H-Bridge for resisTIveand inducTIve loads for automoTIve applicaTIons，such as throttle control actuators or exhaust gasrecirculation control valves.The driving strategy is enhanced by configurablePWM / DIR pins and IN1/IN2.
The H-Bridge contains integrated free-wheeldiodes. In case of freewheeling condition， thelow-side only is switched on in parallel of its diodeto reduce power dissipation.
The integrated Serial Peripheral Interface （SPI）makes it possible to adjust device parameters， tocontrol all operating modes and read outdiagnostic information.
Main features of l9960:
AEC-Q100 qualified
Flexible driving strategy via configurable pinsPWM/DIR （IN1/IN2）
RDSon《 400 mΩ （full path at Tj =150℃ ）
Operating battery supply voltage from 4.5 V upto 28 V
Operating VDD5 supply voltage from 4.5 V to5.5 V
Input switching frequency up to 20 kHz
Built in charge pump supporting 100% dutycycle
Logic levels compatible to 3.3 V and 5 V
Monitoring of VDD5 supply voltage withbidirectional switch-off pin
Current limitation SPI-adjustable in four steps.
Output stage current limitation withdependence on temperature
2 Programmable voltage and current slew ratecontrol
Short circuit and programmable thermalwarning and shutdown thresholds
Open Load diagnosis in ON condition
All I/O pins can withstand up to 19 V
SPI interface for configuration and diagnosis
Two independent enable/disable pins NDISand DIS and SOPC （Switch-off Path Check）available
Spread Spectrum function for EMI reduction
Available in single （L9960） and Twin （L9960T）option， both in PSSO36 package
Figure 1. L9960 block diagram
Figure 2. L9960 detailed block diagram
Figure 3. L9960 application block diagram
Figure 4. L9960 application circuit (case)
Figure 5. Application case of l9960 daisy chain
Evaluation board eval-l9960 / l9960t
The EVAL-L9960 and EVAL-L9960T are evaluation boards designed to provide the user a platform for the L9960 and L9960T， that are integrated H-Bridge （Twin for L9960T） for resistive and inductive loads for automotive applications， such as throttle control actuators or exhaust gas recirculation control valves.
The board offers all the main input/output capabilities needed to drive a DC motor properly and to provide diagnostic functionalities.Full diagnostic is available through SPI. By using SPI communication， it is possible to program L9960 and L9960T while the application is running （e.i. set the current limitation）.A dedicated pin array allows connecting easily a SPC5 discovery+ board and the EVAL-L9960/L9960T. In association with the discovery board SPC560P-DISP a dedicated SW allows controlling a motor control application by using a PC via a U SB port.
The device is an integrated H-Bridge for resistive and inductive loads for automotive applications， such as throttle control actuators or exhaust gas recirculation control valves.
The driving strategy is enhanced by configurable PWM / DIR pins as IN1/IN2.The H-Bridge contains integrated free-wheel diodes. In case of freewheeling conditions， the low side or the high side transistor is switched on in parallel of its diode to reduce power dissipation.
The integrated Serial Peripheral Interface （SPI） allows device parameters adjustment and to control all operating modes and read out diagnostic information.Detailed failure diagnostics on each channel is provided via SPI： short circuit to battery， short circuit to ground， short circuit overload， over temperature. Open-load can be detected in ON condition， for the widest application ranges.
The EVAL-L9960 and EVAL-L9960T boards are suitable for both beginners and expert users working in standalone mode connected with any control system or combined with all SPC5 Discovery+ boards through a computer graphic interface or though embedded application examples.
The board is compatible with both 5V and 3.3V control systems
The EVAL-L9960/L9960T is an evaluation board designed to allow the whole hardware configuration flexibility， giving the user total access to all pins of the L9960/L9960T.
Main characteristics of eval-l9960 / l9960t evaluation board:
Total accessibility to all devices pins
Full HW compatibility with the SPC56 discovery boards through the standard SPC56 Discovery+ connector， 0.1” - 4x36 pin.
Possibility to connect generic microcontroller boards（a） by using a customised adapter
Figure 6. Application block diagram
Figure 7. Outline drawing of eval-l9960
Figure 8. Outline drawing of eval-l9960t
Figure 9. Circuit diagram of eval-l9960t and eval-l9960
Figure 10. Circuit diagram of spc56 discovery + connector
Figure 11. Motor a connector
Figure 12. Motor B connector
Figure 13. L9960t SPI configuration diagram
Figure 14. Eval-l9960t and eval-l9960 PCB layout (top layer)
Figure 15. PCB layout of eval-l9960t and eval-l9960 grid drive board (bottom layer). Read the full text and the technical area
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