Document
UTC TA8229
LINEAR INTEGRATED CIRCUIT
LOW FREQUENCY POWER AMPLIFIER
DESCRIPTION
The UTC TA8229 is an audio power IC with built-in two channels developed for portable radio cassette tape recorder with power ON/OFF switch. Because of the parts reduction and SIP (Single Inline Package), space merit is remarkable. Thermal shut down protection circuit is buit in.
HSIP-15
FEATURES
* High Power : Pout (1) = 2.5W (Typ.) (VCC = 9V, RL = 4Ω, f = 1kHz, THD = 10%) : Pout (2) = 4.6W (Typ.) (VCC = 12V, RL = 4Ω, f = 1kHz, THD = 10%) * Low Popping Noise at Power ON * Small Quiescent Current : ICCQ = 21mA (Typ.) (VCC = 15V, Vin = 0) * Soft Clip * Built-in Thermal Shut Down Protection Circuit * Best for Supply Voltage 9V, 12V * Operation Supply Voltage Range : VCC (opr) = 6 ~ 15V (Ta = 25℃)
HSIP-14
PIN DESCRIPTION
HSIP-14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
PIN NO. HSIP-15
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 NC B.S. 2 OUT 2 Vcc 1 OUT 1 B.S.1 Power-GND Vcc 2 RIPPLE NF1 IN 1 IN 2 NF 2 Pre-GND 1 Pre-GND 2
PIN NAME
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R107-028,A
UTC TA8229
BLOCK DIAGRAM HSIP-15
LINEAR INTEGRATED CIRCUIT
VCC2 8 VCC1 4 6 B.S.1
IN1 NF1
11 10 45Ω
+ Ch-1 5 OUT1
30kΩ RIPPLE BIAS CIRCUIT THERMAL SHUT DOWN PROTECTION CIRCUIT Power-GND
9
7
IN2 NF2
12 13 45Ω
+ Ch-2 2 30kΩ B.S.2 3 OUT2
14 Pre-GND1.
15 Pre-GND2. 1 pin : NC
ABSOLUTE MAXIMUM RATINGS (Ta = 25℃)
PARAMETER SYMBOL Supply Voltage VCC Output Current (Peak/CH) IO (peak) Power Dissipation PD (Note) Operating Temperature Topr Storage Temperature Tstg Note: Derated above Ta = 25℃ in the proportion of 120mW/℃.
RATINGS 20 2.5 15.0 -20 ~ 75 -55 ~ 150 UNIT V A W ℃ ℃
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R107-028,A
UTC TA8229
PARAMETER
Quiescent Current Output Power Total Harmonic Distortion Voltage Gain Input Resistance Output Noise Voltage Ripple Rejection Ratio Cross Talk Input Offset Voltage Stand-by Current
LINEAR INTEGRATED CIRCUIT
SYMBOL
ICCQ Pout (1) Pout (2) THD GV (1) GV (2) RIN Vno R.R. C.T. V11, V12 IOFF
ELECTRICAL CHARACTERISTICS
(VCC=9V, RL=4Ω, Rg=600Ω, f=1kHz, Ta=25℃, Rf=120Ω, unless otherwise specified.)
TEST CONDITIONS
Vin = 0 THD = 10% THD = 10%, VCC = 12V Pout = 0.4W/ch Rf = 120Ω, Vout = 0.775Vrms (0dBm) Rf = 0, Vout = 0.775Vrms (0dBm) Rg = 10kΩ, BW = 20Hz ~ 20kHz Rg = 600Ω, fripple = 100kHz Rg = 600Ω, amp1 2 Vout = 0.775Vrms (0dBm) SW1 OFF
MIN
2.0
TYP
21 2.5 4.6 0.2 45 56.5 30 0.3 -52 -50 30 1
MAX
45
UNIT
mA W
43
1.0 47
% dB kΩ mVrms dB dB
1.0
60
mV µA
APPLICATION INFORMATION AND APPLICATION METHOD
1. Adjustment of voltage gain
The voltage gain GV is obtained as follows by R1, R2 and Rf in Fig.1. Rf + R1 + R2 GV = 20 log Rf + R1 When Rf = 0Ω, GV = 56.5dB (Typ.) When Rf = 120Ω, GV = 45dB (Typ.) By increasing Rf, reduction of GV is possible. However, since the feedback increase is liable to produce oscillation, it is recommended to use this at 40dB or over.
INPUT 11/12 Rf 10/13 + CNF 47µF R1 45Ω + AMP R2 30kΩ 3/5 OUTPUT
Fig.1
2. Thermal shut-down circuit
The thermal shut-down circuit is built in for the purpose of preventing the destruction of IC due to the abnormal temperature rise when the heat radiation is insufficient. The operation temperature is set at radiation Fin temperature 175℃(Typ.). At this temperature or over the bias is interrupted to prevent the destruction of IC.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R107-028,A
UTC TA8229
3. Input stage
LINEAR INTEGRATED CIRCUIT
The input circuit of this IC is as shown in Fig.2. PNP Tr: Q1 is provided in the input circuit so as to make its usage possible without the input coupling capacitor. However, at pin 11 and 12 , max 60 mV offset voltage is produced. Application after checking volume slide noise is recommended. For cutting the volume slide noise, insert the input capacitor: CIN in series to interrupt the DC component.
OUTPUT
INPUT +
Q2
Q3
30kΩ
3/ 5
11/12 30kΩ 14/15 GND
Q1
To DRIVER 45Ω To BIAS NF 10/13 Rf + 47µF
CIN
Fig. 2
4. Oscillation preventive measures
For oscillation preventive capacitor C6 and C7 between the output terminal and GND, it is recommended to use polyester film capacitor having good characteristics for temperature and for high frequency. Since the characteristics of the capacitor is liable to be influenced by the temperature, use this capacitor after the temperature test to check the oscillation allowance. In addition, as the position of the electrolytic capacitor has a remarkable influence on the oscillation, connect C10 to VCC at the nearest possible position from power GND. At using this application with the voltage gin reduced, oscillation is liable to be produced. Apply the capacitor after checking enough for its capacity, type and mounting position. (*) As the oscillation allowance varies according to the printed pattern layout, the standard printed board of TOSHIBA is recommended to be referred to design it.
5. Power ON/OFF switch
There is power ON/OFF switch at ⑧pin. However, output power is changed by .