KA9258CDTFNL Fairchild Semiconductor, KA9258CDTFNL Datasheet - Page 9

• Manufacturer Part Number: KA9258CDTFNL
• Manufacturer: Fairchild Semiconductor

Specifications of KA9258CDTFNL

• Operating Temperature Classification: Industrial
• Package Type: SSOPH-375
• Operating Supply Voltage (min): 6V
• Operating Supply Voltage (max): 13.2V
• Lead Free Status / RoHS Status: Compliant

Application Information
1. Mute Function
• When the mute (pin 7) is high level, the bias circuit of BTL driver is activated. On the other hand, when the mute (pin7) is
2. TSD (Thermal Shutdown) Function
• The V
• The base-emitter voltage of the transistor, Q11 is designed to turn-on at below voltage.
•
• When the chip temperature rises up to 175°C, then the turn-on voltage of the Q11 would drop down to 460mV.
3. OP-AMP
• General OP-amplifier is integrated in the IC for user’s convenience.
open or low level, the bias circuit of BTL driver is disabled. So that the 4-channels BTL driver output circuit will be muted.
circuit.
Hence, the Q11 would turn on so the output circuit will be muted. The TSD circuit has the hysteresis temperature of 25°C.
REF BG
Open
Pin 7
High
Low
is the output voltage of the band-gap-referenced biasing circuit and acts as the input voltage of the TSD
Mute circuit
Mute-on
Mute-on
Mute-off
R11
R12
16
15
V
REFBG
V
BE
=
V
R
REFBG
Q11
11
+
×
R
7
R
12
4-Channels BTL driver
12
Bias Circuit Block
=
460
[
mV
VCC
]
14
4-Channels BTL driver
Bias Circuit Block
KA9258D(KA9258CD)
9