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參數(shù)資料
| 型號(hào)： | KA3014 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 光電元器件 |
| 英文描述： | Spindle + 4-CH Motor Driver |
| 中文描述： | CD MOTOR DRIVER, PQFP48 |
| 封裝： | 14 X 14 MM, HEAT SINK, QFP-48 |
| 文件頁數(shù)： | 12/26頁 |
| 文件大小： | 419K |
| 代理商： | KA3014 |
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KA3014
12
Application Information
1. MUTE FUNCTION
Mute control voltage condition
When using the mute function, the applied control voltage condition is as follows.
Mute on voltage
Mute off voltage
Open or 0.5[V] below
Individual channel mute function
These pins are used for individual channel mute operation.
- When the mute pins (pin 37, 38 and 39) are open or the voltages at the mute pins are below 0.5[V], the mute circuit is
stopped and BTL output circuits operate normally.
- When the mute pins (pin 37, 38 and 39) are above 2.5[V], the mute circuits are activated so that the BTL
output circuit is muted.
- If the junction temperature rises above 175
°
C, then the thermal shutdown (TSD) circuit is activated and all the output
circuits (4-CH BTL drivers and 3-phase BLDC driver) are muted.
2. 4-CH BALANCED TRANSFORMERLESS (BTL) DRIVER
The voltage, Vbias, is the reference voltage given by the external bias voltage of pin 41.
The input signals, Vin, through the pins (pin 22, 23, 24 and 25) are amplified 10k/rextern times and then fed to
the level shift.
The level shift produces the current due to the difference between the input signal (Vin) and the arbitrary
reference voltage (Vbias). The current produced as +
I and
I are fed into the drive buffers.
The drive buffer operates the power TR of the output stage according to the state of the input signal (Vin).
The output stage is the BTL driver, and the motor (or actuator) rotates in forward direction when TR
Q1 and TR Q4 are on. On the other hand, if TR Q2 and TR Q3 are on, the motor (or actuator) is rotating in
reverse direction.
When the input signal Vin, through the pin (pin 22, 23, 24 and 25) is below the Vbias, then the motor (actuator) moves in
forward direction.
When the input signal Vin, through the pin (pin 22, 23, 24 and 25) is above the Vbias, then the motor (actuator)
moves in reverse direction.
To change the gain, Modify the external resistor's value (Rextern)
2.5[V] above
Mute function operation
Normal operation
+
AMP1
VCC
Q1
Q2
Q3
Q4
LEVEL
SHIFT
GND
DRIVE
AMP
DRIVE
AMP
M
41
22 23
24 25
27
29
33
36
26
28
32
35
Rextern
10k
Vbias
Vin
X2
X2
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