BA6238A Rohm Semiconductor, BA6238A Datasheet - Page 11

• Manufacturer Part Number: BA6238A
• Description: IC DRIVER REV MOTOR 2CH HSIP10
• Manufacturer: Rohm Semiconductor

Specifications of BA6238A

• Applications: DC Motor Driver
• Number Of Outputs: 2
• Current - Output: 1.6A
• Voltage - Supply: 8 V ~ 18 V
• Operating Temperature: -25°C ~ 75°C
• Mounting Type: Through Hole
• Package / Case: 10-SIP + Tab
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -

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BA6246, BA6246N, BA6247FP-Y, BA6239A, BA6238A, BA6238AN
c
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2) Output high voltage setting
This function optionally sets output voltage by the VR pin and controls the motor rotating speed. However, when the
output high voltage is set to a low level, consumption at IC increases. Carry out thermal design with sufficient margin
incorporated with the power dissipation (Pd) under the actual application condition taken into account. Please do not to
exceed the VCC1 and VCC2 voltage forced to the VR pin voltage.
a) BA6246, BA6246N, BA6247FP-Y
b) BA6239A
The circuit diagram associated with the output high voltage setting VR pin is as per shown on the right.
The output high and low voltages V
V
V
V
(Reference values; V
In addition, the relation of VREF voltage to output voltage
is expressed by:
VR < VCC1 - V
VR < VCC2 - V
Therefore, when the VR voltage condition is as follows, the output high voltage is restricted.
VR > VCC1 - V
VR > VCC2 - V
V
V
The circuit diagram associated with the output high voltage setting VR pin is as per shown on the right.
The output high and low voltages V
V
V
(Reference values; V
In addition, the relation of VREF voltage to output voltage
is expressed by:
( V
Therefore, when the VR voltage condition is as follows,
the output high voltage is restricted.
VR > VCC2 - V
V
OH
OH
OL
OH
OH
OH
OL
OH
SAT(Q1)
= V
= V
= VR + ( V
≈ VR
= VCC1 - V
= VCC2 - V
= VR - ( V
= VCC2 - V
SAT(Q7)
SAT(Q3)
+ V
F(Q2)
+ V
+ V
SAT(Q1)
F(Q5)
SAT(Q1)
SAT(Q3)
SAT(Q1)
SAT(Q3)
SAT(Q2)
SAT(Q1)
SAT(Q3)
SAT(Q2)
) < VR < VCC2 - V
F(Q6)
F(Q4)
+ V
+ V
SAT
SAT
- V
+ (V
- V
+ (V
+ V
- V
F(Q4)
F(Q2)
≈ 0.2V, V
F(Q4)
F(Q4)
≈ 0.1V, V
F(Q2)
F(Q2)
F(Q2)
F(Q2)
) - ( V
)
- V
- V
- V
+ V
+V
+V
F(Q5)
F(Q5)
F(Q3)
F(Q2)
SAT(Q1)
F(Q3)
F(Q3)
F
F
OH
≈ 0.7V)
OH
≈ 0.7V)
SAT(Q2)
) - ( V
) - ( V
+ V
and V
and V
F(Q3)
+ V
F(Q4)
F(Q4)
OL
OL
)
F(Q2)
are expressed by:
are expressed by:
+ V
+ V
11/15
+ V
F(Q5)
F(Q5)
SAT(Q1)
)
)
Fig.35 BA6246, BA6246N, BA6247FP-Y
VR
Fig.36 BA6239A
Q1
Q4
Q5
Q1
Q3
Q2
Q4
Q2
Q7
Technical Note
2009.04 - Rev.A
Q3
Q6
OUT
GND
VCC2
VR
VCC1
VCC2
OUT
GND