TA8106F TOSHIBA | Alldatasheet
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TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC STEREO HEADPHONE POWER AMPLIFIER (1.5V USE) The TA8106F is a Dual headphone amplifier IC designed for low voltage operation (1.5V, 3.0V), which is suitable for stereo headphone radio and radio cassette recorder equipments. This item can realize the low power dissipation and have high power output capability. d J ¥5) FEATURES 5 sgh © Condenser-less for input and output. UUs a © Condenser-less for bootstrap. - @ Built-in the muting function. @ High power output capability according to adopting the SSOP16-P-225-1.00A Matrix Drive Method. Weight : 0.14g (Typ.) Po (1) =14mW/ch (Typ.) at Vin (R) =Vin (L) mode Po (2) =5.5mW/ch (Typ.) at Vin (R)= —Vin (L) Mode Po (3) = 10.5mW/ch (Typ.) at Vin (R)=0 oF Vin (L)=0 (Vcc =1.5V, RL = 320, f= 1kHz, THD = 10%) © Operating supply voltage range. : Vcc (opr) = 0.9~5.0V (Ta =25°C) BLOCK DIAGRAM g OVec af 4 3 se Su Ww +48 8, “te sl a [? 78 . < Ls] fH Ste “ | ed [| “ PHASE [| TooprL_=o PHASE COMP. OMP. Our, OTRO O_O, © Ma CA TAT v Y FEEDBACK FEEDBACI AMP OM; Lo AMP a oT VN [ \\——( RO OE OOO EO OD kl “ft eno i]: aT) ong en at nwo GOFF © INR) 2610016802 malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA. products are used within specified operating ranges as set forth in the most recent products specifications. Also, please keep in mind the precautions and conditions set forth in the TOSHIBA Semiconductor Reliability Handbook. 1997-07-07 1/8
SUMMARY OF MATRIX DRIVE METHOD Though the BTL is usually used to obtain enough power at low voltage, it can not be used for the headphone amplifier (especially, 1.5V USE), which has only one left-and right common line. Then a new modified BTL drive method is developed, which is called “Matrix Drive Method”. It has only one common line. Fig.1 Shows the Principle. The input signals of the audio frequency are applied to the terminal of L /R. These are transformed by the matrix converter into the outputs, as following ; (woo -e tend LR: input signal © V@=R- al a : matrix ratio Lo > \\ And the output signals of L/R loads are given by ML (vrvo-vortes L matrix > < VR=VO-V@=(1+a) R Ve Thus, each output signal does not leak to another J channel load. RO > This gain is (1+) times as high as a conventional single Fig. amplifiers’. However the undistorted maximum output is . determined by each clipping point of lines, ®, ® and ©. Therefore, the most effective point is determined by the following states of input. As the state of input is at 20 Poo Lak L=R mode, a is 1/3, so this system is operated most ' input mode (L or R only), a@ is 1. vo 3 ht It is a common saying that the practical musical source Vo [--- t Lak consists of the common phase component in most. And ' ' ' the low frequency of that causes the clipping to product tt ! mostly. Therefore in this item, a is 1/3. In result at L=R mode, this gain is obtained twice as Vin high as a single amplifiers. Fig.2 At single input mode, 4/3 times, at L= -R mode, is obtained as same as a single. APPLICATION NOTE (1) Input stage The first stage is composed of the differential amplifier 8 NE of PNP-input. Therefore, it is not necessary to use any IN (27) coupling condensers (Fig.3). ° (vis) (| The input impedance is determined by the internal T_| + ef resistance (51k). a This output is connected to the next stage through the emitter follower. Fig.3 961001EBA2" @ The products described in this document are subject to foreign exchange and foreign trade control laws. © The information contained herein is presented only as a guide for the applications of our products. No responsibilty is assumed by, TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. TOO 9-07-07
(2) Matrix converter The matrix ratio is determined by the amplifier A, Az, as Lo > 1 ® > shown in Fig.4. Each of the output currents, which have a t_| ratio (1: a), is formed by Ay, Az. * [x | The outputs of matrix converter, which are previously MATRIX ‘> mentioned, are a LK Gl V@=L~-aR 20 p= [=> V@®=-a@ (L+R) 1 V@=R- al These are applied to the drivers By, C, B2. Fig.4 (3) Muting function As the terminal pin @ for the muting function is connected ec to Vcc, Q1 is turned on, then Q2 and Q3 are turned on. b ) Therefore the DC voltage of the terminal pin © is down, and f all of the circuits stop. At this time, the quiescent supply & BIAS « + current (IccqQ) scarcely flows into this system. As the terminal FS SECTION © to POWER pin @ is opened, the DC voltage of the terminal pin © does C] Sactign not quickly come up, because of the presence of the CR a Qe 3 time-constant. So, the shock-noise is reduced. As the supply ¢ a3 voltage is turned on, this operation is also done. rs (4) DC Feed-Back circuit G) In this system, the output loads are directly connected to the oe é output terminals. Therefore, in order that the output DC | offset voltages are reduced, this system is built-in the DC Fig.5 feed-back circuit. The currents, which are in proportion of the differential voltage between two DC terminal voltages in each Lo 11 =K (V®-V®) [> hex (io-vp) ped are fed into the matrix converter. 4 Thus the DC offset voltages are reduced. This system is ’ K (VW@-V@) effective more than about 1.2V. f (5) Oscillation precaution RO B Small temperature coefficient and excellent frequency ce | characteristic is needed by capacitors below. e oan preventing capacitors for power amplifier !2 kW@-vo) © Capacitor between Vcc and GND ’ Ks CONSTANT Fig.6 1997-07-07 3/8
(6) Total gain : Gy In this system, the total gain Gy is given by 4xR2 Re Gy =20f0g “Ri Typical values of this system is Ry =1.6kQ, R2 = 19kQ, oN (v8) then this gain is ; Gy=34dB (Typ.) (on) (Note) The internal resistances are fixed, then the Gn) Ten gain is fixed. In additional to the attenuator “Rene in front of this system, the gain is DC FEED BACK changeable. MAXIMUM RATINGS (Ta = 25°C) Fig.7 CHARACTERISTIC SYMBOL RATING UNIT Supply Voltage [vec | 5 JOutput current | loipeaky [| 160 | ma_| Pp (Note) =25~75 (Note) Derated above Ta=25°C in the proportion of 2.8mW/°C. ELECTRICAL CHARACTERISTICS (AC) (Unless otherwise specified, Ta=25°C, Vcc =1.5V, f= 1kHz, Rg =6200, R, = 320) TEST CHARACTERISTIC SYMBOL TEST CONDITION |r. [a UNIT CUIT Quiescent Supply Current | Iccg [= [Vin=0 CT — | 84 | ma f [input Resistance TRIN, oT ~ [OO 5 T = TF KO [voltage Gain | Gy | — |Vjn= ~S0aBV [30 | 33 | 36 | a8 | Channel Balance | 4Gy | — | Vin py = Vin | — | of 13 | oB | Vin (R) = Vin (L) Po(1) | — [vines Vin (R) = ~ Vin (L) Output Power Po (2) | — | THD = 10% 5.5 mW Vin (R)=9 oF Vin (L) =9 P, =P, =1mW von |= omecams [= [of @ [= [ee R) = Vin (U Total Harmonic Distortion THD (2) | — | fo () =Po(R) = 1mW | — [as] — | % n(R)= —Vin Vin (R)=0 OF Vin (L) =0 Output Noise [ Vno | — [Rq=6200, BPF=20Hz~20kHz | — [0.15 | 0.3 |[mVime| ; a ; V;= - 30dBV ros wan se [| [a eon || *|- [| Muting Attenuation Patt | = |Vyure=15v [— | 60] — | a | 1997-07-07 4/8
DC CHARACTERISTICS (Vcc = 1.5V, Ta = 25°C, terminal voltage at no signal) (LON PIN @ (MUTE) [vs [| — iv [Pn (PRE GND) ——SC~idC‘? S| Cid (VY PIN (NPUT A) [ve [06 |v] PIN @ (PHASE COMPENSATION) [pina PW GND) fi PIN (OUTPUT) PIN (PHASE COMPENSATION) TEST CIRCUIT
472 R_ 22) R_ (322) 472
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10 Iecq = Vec AVo - Vcc
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2 LETT TTT Tritt Fo LEE AT
& LitTitTi {Titi t [4] LETT TT tt Tit J a a a SUPPLY VOLTAGE Vcc (V) SUPPLY VOLTAGE Vcc (V)
50 Gy - Voc 20 RR - Vcc
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5 ca -f 5 CT = Po vey LUM TTI veeersy HT | TTT J col 20 ITT TTT cof hee (UT TTT 3 vorovowey TUTTE TTT | 3 tone ae ecco ||| 5 ap eee TT s A eA es A ee Nn
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80 SS 8 Se i
5 BSS SEER THE 100m SE
8 SS Set Say 8 JS Se Ser
Se === ee ae ee SN fof ee ZB oof 2 fictiep paps | Z “Sea | ll P ob LT PTT ery a ce ce ce eT OUTPUT POWER Po (mW) OUTPUT POWER Po (mW) THD - Po Iccq - Ta 109) ——=====s—— 19 2 | frurte-o HEH eg pee TTT TT a ce | EE S 5 yi = PEAS gE $ Tim 2 4 ee ae PCO 2 3(— ie th 2 LITT TT TTT tte
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OUTPUT POWER Po (mW) AMBIENT TEMPERATURE Ta (°C) TTT AGT-07-07— 7
SSOP16-P-225-1.00A Unit : mm 16 9 ‘ a a} © xl = | ¢ 5 o Le) <| 3 a 1 8 0.6 0.440.1 10.200 8.7MAX 8.2+0.2 g Nx ma gs 3 OT Q ™ - r fo} cals 0.52540.2 r~) Weight : 0.14g (Typ.) TOO «9-07-07