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BA6247FP-Y Datasheet(Arkusz danych) 14 Page - Rohm

Numer części BA6247FP-Y
Szczegółowy opis  Reversible motor drivers (for two motors series)
Pobierz  16 Pages
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Producent  ROHM [Rohm]
Strona internetowa  http://www.rohm.com
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 14 page
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Technical Note
14/15
BA6246, BA6246N, BA6247FP-Y, BA6239A, BA6238A, BA6238AN
www.rohm.com
2009.04 - Rev.A
c
2009 ROHM Co., Ltd. All rights reserved.
7) Operation in strong electromagnetic fields
Using this product in strong electromagnetic fields may cause IC malfunctions. Use extreme caution with
electromagnetic fields.
8) ASO - Area of Safety Operation
When using the IC, set the output transistor so that it does not exceed absolute maximum ratings or ASO.
9) Built-in thermal shutdown (TSD) circuit
The TSD circuit is designed only to shut the IC off - when BA6239A, BA6238A/AN, driver outputs low - to prevent
thermal runaway. It is not designed to protect the IC or guarantee its operation in the presence of extreme heat. Do
not continue to use the IC after the TSD circuit is activated, and do not operate the IC in an environment where
activation of the circuit is assumed.
10) Capacitor between output and GND
In the event a large capacitor is connected between the output and GND, if VCC and VIN are short-circuited with 0V or
GND for any reason, the current charged in the capacitor flows into the output and may destroy the IC. Use a capacitor
smaller than 1μF between output and GND.
11) Testing on application boards
When testing the IC on an application board, connecting a capacitor to a low impedance pin subjects the IC to stress.
Therefore, always discharge capacitors after each process or step. Always turn the IC's power supply off before
connecting it to or removing it from the test setup during the inspection process. Ground the IC during assembly steps
as an antistatic measure. Use similar precaution when transporting or storing the IC.
12) Switching of rotating direction (FWD/REV)
When the rotating direction is changed over by the motor rotating condition, switch the direction after the motor is
temporarily brought to the BRAKE condition or OPEN condition. It is recommended to keep the relevant conditions as
follows:
via BRAKE: Longer than braking time*.
(* the time required for the output L terminal to achieve potential below GND when brake is activated.)
via OPEN: The time longer than 1 ms is recommended (BA6246, BA6246N only)
13) Regarding the input pin of the IC
This monolithic IC contains P+ isolation and P substrate layers between adjacent elements, in order to keep them
isolated. P-N junctions are formed at the intersection of these P layers with the N layers of other elements, creating a
parasitic diode or transistor. For example, the relation between each potential is as follows:
When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode.
When GND > Pin B, the P-N junction operates as a parasitic transistor.
Parasitic diodes inevitably occur in the structure of the IC. The operation of parasitic diodes can result in mutual
interference among circuits, as well as operating malfunctions and physical damage. Therefore, do not use methods by
which parasitic diodes operate, such as applying a voltage lower than the GND (P substrate) voltage to an input pin.
BA6246 / N
BA6247FP-Y
BA6239A
BA6238A / AN
TON [°C]
170
170
150
150
THYS [°C]
30
30
50
50
*All temperature values are typical.
Resistor
Transistor (NPN)
N
N
N
P
+
P
+
P
P substrate
GND
Parasitic element
Pin A
N
N
P
+
P
+
P
P substrate
GND
Parasitic element
Pin B
C
B
E
N
GND
Pin A
Pin B
Other adjacent elements
E
B
C
GND
Parasitic
element
Appendix: Example of monolithic IC structure
Parasitic
element




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