Maximum Continuous Output Current: 20A @T=85° CC5V Logic Level Compatible Input Thermal Shutdown Low Voltage Protection Open Leakage Diagnostic Output Inductive Load Fast Degauss Very Low Standby Power Consumption
The vn16bps is a monolithic device manufactured using stmicroelectronics vipower technology for driving resistive or inductive loads that are grounded on one side.
A built-in thermal shutdown protects the chip from overheating and short circuits.
Open-drain diagnostic output indicates: open load is off and on, output is shorted to V and overheated. Fast degaussing of inductive loads is achieved by a negative ( -18V ) load voltage at shutdown.

Functional Description The unit has a diagnostic output that indicates an open load is on, an open load is off, an overtemperature condition, and is stuck at VCC.
Beginning with the falling edge of the input signal, the status output, initially low to signal a fault condition (overtemperature or open load open state), will return with different delays in overtemperature (TPovl) and open load (TPol) conditions, respectively high state. This feature allows to differentiate the nature of detected faults. To protect the device from short circuit and overcurrent conditions, thermal protection shuts down the integrated power mos at a minimum junction temperature of 140°C. When that temperature returns to 125°C, the switch will automatically turn on again. In the event of a short circuit, the protection is almost without delay and the sensor is located in the power mos region. The internal functions of the device ensure fast degaussing of inductive loads with a typical voltage (VDEMag) of 18V. This feature can greatly reduce power consumption according to the following formula: PDEM=0.5 low load (low load)[(VCC+VDEMag)]/2v] f where f=switching frequency and Demag
vdemag = demagnetization voltage The maximum inductance to bring the die temperature to the shutdown temperature under the specified thermal environment is a function of the load current for a fixed VCC, VDEMag and F calculated according to the above formula. In this setup, if the ground pin is disconnected and the voltage does not exceed 16V, it will shut down.
Protect device from reverse battery

The easiest way to protect your device from sustained reverse battery voltage (-26V) is to insert a Schottky diode between pin 1 (GND) and ground. The result of the voltage drop across this diode is as follows:
– If the input is pulled to GND, the device sees a negative development of -vf. (VIL, VIH threshold, and VSTAT are increased by VF relative to supply ground).
- The undervoltage shutdown level is increased by VF.
If the control unit does not need to handle external analog signals related to the power supply GND, the best way is to connect the reference potential of the control unit to node [1], which becomes the common signal GND of the entire control board, avoiding VIH, VIL and VSTAT shift. This solution allows the use of standard diodes.

Overcurrent Test Circuit

Typical Application Circuit of Schottky Diode Reverse Power Supply Protection

Typical Application Circuit with Separate Signal Ground

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