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BD8112EFV-M
Technical Note
This IC is a monolithic IC, and has P isolation and P substrate for the element separation. Therefore, a parasitic PN
7. Radiation
Strong electromagnetic radiation can cause operation failures.
8. ASO(Area of Safety Operation.)
Do not exceed the maximum ASO and the absolute maximum ratings of the output driver.
9. TSD(Thermal shut-down)
The TSD is activated when the junction temperature (Tj) reaches 175 ℃ (with 25 ℃ hysteresis), and the output terminal is
switched to Hi-z. The TSD circuit aims to intercept IC from high temperature. The guarantee and protection of IC are not
purpose. Therefore, please do not use this IC after TSD circuit operates, nor use it for assumption that operates the TSD
circuit.
10. Inspection by the set circuit board
The stress might hang to IC by connecting the capacitor to the terminal with low impedance. Then, please discharge
electricity in each and all process. Moreover, in the inspection process, please turn off the power before mounting the IC,
and turn on after mounting the IC. In addition, please take into consideration the countermeasures for electrostatic
damage, such as giving the earth in assembly process, transportation or preservation.
11. IC terminal input
+
junction is firmed in this P-layer and N-layer of each element. For instance, the resistor or the transistor is connected to
the terminal as shown in the figure below. When the GND voltage potential is greater than the voltage potential at
Terminals A or B, the PN junction operates as a parasitic diode. In addition, the parasitic NPN transistor is formed in said
parasitic diode and the N layer of surrounding elements close to said parasitic diode. These parasitic elements are
formed in the IC because of the voltage relation. The parasitic element operating causes the wrong operation and
destruction. Therefore, please be careful so as not to operate the parasitic elements by impressing to input terminals
lower voltage than GND (P substrate). Please do not apply the voltage to the input terminal when the power-supply
voltage is not impressed. Moreover, please impress each input terminal lower than the power-supply voltage or equal to
the specified range in the guaranteed voltage when the power-supply voltage is impressing.
Resistor
Transistor(NPN)
Terminal-A
Terminal-B
C
B
Terminal-B
E
Terminal-A
Parasitic
B
C
E
P
P
P
P
+
P
+
element
+
P
+
P-Substrate
P-Substrate
Surrounding
elements
Parasitic
element
GND
Parasitic
element
GND
Parasitic
element
GND
GND
Simplified structure of IC
12. Earth wiring pattern
Use separate ground lines for control signals and high current power driver outputs. Because these high current outputs
that flows to the wire impedance changes the GND voltage for control signal. Therefore, each ground terminal of IC must
be connected at the one point on the set circuit board. As for GND of external parts, it is similar to the above-mentioned.
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21/22
2011.08 - Rev.C
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