KA3014 Fairchild Semiconductor, KA3014 Datasheet - Page 12

• Manufacturer Part Number: KA3014
• Description: MOSFET & Power Driver ICs QFPH-48
• Manufacturer: Fairchild Semiconductor

Specifications of KA3014

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Application Information
1. MUTE FUNCTION
• Mute control voltage condition
• Individual channel mute function
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 produces the current due to the difference between the input signal (Vin) and the arbitrary
• 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
• When the input signal Vin, through the pin (pin 22, 23, 24 and 25) is below the Vbias, then the motor (actuator) moves in
• When the input signal Vin, through the pin (pin 22, 23, 24 and 25) is above the Vbias, then the motor (actuator)
• To change the gain, Modify the external resistor's value (Rextern)
When using the mute function, the applied control voltage condition is as follows.
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
- When the mute pins (pin 37, 38 and 39) are above 2.5[V], the mute circuits are activated so that the BTL
- If the junction temperature rises above 175 C, then the thermal shutdown (TSD) circuit is activated and all the output
the level shift.
reference voltage (Vbias). The current produced as + I and
reverse direction.
forward direction.
moves in reverse direction.
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
stopped and BTL output circuits operate normally.
output circuit is muted.
circuits (4-CH BTL drivers and 3-phase BLDC driver) are muted.
Mute on voltage
Mute off voltage
Vbias
Vin
Rextern
22 23
24 25
Open or 0.5[V] below
41
2.5[V] above
DRIVE
AMP
X2
AMP1
+
10k
Q1
Q3
12
27
29
33
36
I are fed into the drive buffers.
Mute function operation
LEVEL
SHIFT
VCC
Normal operation
M
GND
26
28
32
35
Q2
Q4
DRIVE
AMP
X2
KA3014