0.5A output current

8 to 35 V power supply voltage range

External programming current

Limit

Non -dissipated over current protection [ 123]

Hot shutdown

HYS Teresys IOlining Holding

Diagnostic output with too low voltage, high temperature and excessive temperature

] External asynchronous reset input

Preset delay of overload diagnosis

Open ground protection

Lang Yong Protection (IEC 805-1)

Anti-emergencies Instant (IEC 801-4)

ESD protection (human model ± 2 kV)

Explanation

This device is a single-piece smart power-driven multi-power BCD switch for multi-power BCD switch Technical induction, capacitance or resistance load. The CPU feedback diagnosis and extensive use of electrical protection devices make the device strong and non -destructive, suitable for general industrial applications.

Electric characteristics (vs 24V; TJ -25 to 125 ° C; unless there are other regulations.) DC operations

]

Input section

Input and asynchronous reset

TTL/CMOS high -antidity (thanks to the built -in HYS Teresis) to choose from. Overheating Protection (OVT), a piece of temperature protection on a piece of temperature provides excellent protection conditions for the device under extreme circumstances. When the temperature measured in the center of the chip exceeds TMAX 150 C (typical value) device, the diagnostic output becomes lower. When the chip temperature (usually a few seconds) drops to the following, the normal operation Tmax Thys 130 degrees Celsius (typical values). Stay avoid intermittent behavior.

Impolosculent protection (UV)

The power supply voltage is expected to be 8 to 35 V. In this range, the equipment work is normal. When less than 8 V, the entire system must be considered unreliable. In order to avoid any failure to continuously monitor the voltage of the power supply to provide under voltage protection. When VS declines, VSTH VSHYS is low (usually 7.5 V, see Figure 1) output power MOS closed, Diag out output becomes lower. Normal operation is restored to once VS exceeds VSTH. The delayed characteristics can prevent intermittent operating voltage under low power.

Overcurrent operation

In order to implement short -circuit output power MOS, the output current that limits the ISC value in a linear mode to limit the ISC value. This ISC limitation is a resistor that can be performed from an external settings from the external 1/4 W.Essence This resistance must be based on the following formulas: ISC (A) 5/RSC (thousand Euros) has 5 lt; RSC LT; 30 (a thousand euros). The ISC 1.1A (typical value) of ISC 1.1A (typical values). This situation (current limit is ISC value) continues one ton time interval, which can be connected to ON through a capacitor (CDON) to delay the following formulas: TON 1.28 millisecond/pf for 50pf lt; cdon lt; 2NF ton interval, output, output, output, output, output, and output Power MOS is closed within the TOFF time interval: TOFF 64

When the TOFF time interval expires, the output power MOS is connected. There may be two cases now-overload still exists. In this case, the output power MOS once again increases one ton with a linear mode (limiting the output current of ISC), starting a new cycle, or -The-overload conditions to eliminate, and the output power MOS is no longer linear driving mode. All these situations appear on the diagnostic map (see Figure 2). We call this unique function to dissipate short -circuit protection, and even in permanent conditions, it can ensure that it is very safe to run overload. Please note that of course, you can choose the most suitable value (that is, the value of the CDON capacitor) for the ton interval, which will prevent misleading short -circuit information on the DIAG output. Or incandescent lamps (the resistance of cold filaments is low).

There is no short -circuit protection Disable (keep ton 0, but there is only output to limit the current to the ground. Edivation of the induced load l6377 There is an internal pliers with an internal pliers The Qina diode can reduce the load of the induced induction. Please pay attention to the restriction from the package that can be processed. You must pay attention to the correct circuit board thermal design. If, the peak power loss is too high due to the reason (the load current or the induction value is also large). The configuration of the diode pipe will form a to -ground or ground demagnetic VS (see Figure 5 and Figure 6). When the breakdown voltage selects the external Zina diode, the internal clamp voltage (VCL) and the power supply voltage (VS) must be considered ; VCL (minimum value) -vs (maximum value) Dagging or vs (maximum) lt; vz lt; vCl (minimum) degenerate vs ]