TA8225HQ Toshiba, TA8225HQ Datasheet - Page 5

• Manufacturer Part Number: TA8225HQ
• Manufacturer: Toshiba

Specifications of TA8225HQ

• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 1-Channel Mono
• Output Power (typ): 45x1@2OhmW
• Audio Amplifier Function: Speaker
• Single Supply Voltage (typ): 12/15V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Power Dissipation: 50W
• Rail/rail I/o Type: No
• Single Supply Voltage (min): 9V
• Single Supply Voltage (max): 18V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -30C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 17
• Package Type: HZIP
• No. Of Channels: 1
• Package: HZIP 17-P-2.00
• Recommended Vcc (v): 13.2
• Rl=2 Ohm: 40W x 1
• Rl=4 Ohm: 23W x 1
• Rl=8 Ohm: -
• Features/built-in Functions: Standby switch
• Operating Voltage (v): 9 to 18
• Lead Free Status / Rohs Status: Compliant

4. Junction temperature detecting pin(2)
Using temperature characteristic of a band gap circuit and in proportion to junction temperature, pin(2) DC
voltage: V
V
In deciding a heat sink suze, a junction temperature can be
easily made clear by measuring voltage at this pin while a
backside temperature of IC was so far measured using a
thermocouple type thermometer.
(2) Input offset voltage
2
χ at T
Input offset voltage is increased by as many times as a gain and appears as output offset voltage.
Input offset voltage is affected by an external resistor in addition to properness of pair of capacitor in IC.
An example of a general application circuit is shown in (Fig.5). In this case, input to the differential amplifier
composing the buffer amplifier is decided to be 30kΩ + 1.1kΩ = 31.1kΩ at the in (+) side and 1.1k at the in (−)
side. Therefore a rising difference of about 30 times between the in (+) side and the in (−) side.
So, to fit input offset voltages, it is possible to suppress the input offset voltage by adjusting it to 31.1kΩ both
at the in (+) and in (−) sides according to the application example shown in (Fig.6). As input coupling
capacitors are used in actual set, the circuit shown in (Fig.7) is considered. In this case, it is necessary to
take the utmost care of proper pair of C
T
( j
° χ
C)
j
2
=
=χ°C is decided by the following expression:
rises at about ±10mV / °C temperature characteristic. So, the relation between V
V
2
10mV /
χ
−
Pop noise level affected by input offset voltage shall be checked on an actually mounted set.
V
2
(25
°
C
°
C)
+
25(
°
C)
IN
(+) and C
5
IN
(−).
TA8225HQ/LQ
2
at T
2006-04-28
j
= 25°C and