KA9259HD Fairchild Semiconductor, KA9259HD Datasheet - Page 8

• Manufacturer Part Number: KA9259HD
• Manufacturer: Fairchild Semiconductor

Specifications of KA9259HD

• Operating Temperature Classification: Commercial
• Package Type: SSOP
• Operating Supply Voltage (min): 6V
• Operating Supply Voltage (max): 13.2V
• Lead Free Status / RoHS Status: Compliant

KA9259D(KA9259HD)
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.
• If the chip temperature rises above 175°C, then the TSD circuit is activated and the output circuit is muted. The TSD circuit
3. Voltage Regulator
8
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.
has the hysteresis temperature of 25°C.
REFBG
Pin #7
Open
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-off
Mute-on
Mute-on
KA9259D
V
2.5V
REFBG
R11
R12
V
REFBG
V
BE
=
V
R
REFBG
11
Q11
+
×
R
7
& Loading motor driver
R
4-Channels BTL driver
12
R2
R3
12
Bias Circuit Block
21
5
6
=
400
[
mV
PNP
C1
VCC
]
Vout
VCC
4-Channels BTL driver
Bias Circuit Block