IC for Headphone Stereos (bass boost) LAG668 MITSUMI IC for Headphone Stereos (bass boost) Monolithic IC LAG 668 Outline This IC was developed to provide bass boost functions without deviating from the basic design concept of Mitsumi's LAG665, which is highly regarded for applications in headphone stereos for overseas markets in particular. Bass boost functions are widely adopted in models for overseas markets as well. However, because of stringent cost constraints, there has been a need for an IC which is simple and inexpensive. This IC can provide bass boost functions simply by adding three resistors and one capacitor (per channel). Moreover, it has the same pinout as the LAG665, so that by making selective use of set features, a product lineup can be developed without changes to the printed circuit board. Features 1. Configuration: pre and power amps, motor control, E. VR, bass boost 2. Preamp off function convenient for use in models with radios 3. Independent motor control circuit 1. Motor noise is effectively suppressed 2. With motor on/off pin (motor can be stopped easily when radio is in use) 3. With fast forward pin 4. Bass boost frequency characteristic can be changed simply by changing the resistance multiplier. 5. Well-balanced E. VR circuit 1. L, R channels variable using a single VR 2. A-curve can be reproduced using B-curve VR 6. Few external components Package SOP-28B (LAG668F) SDIP-30A (LAG668D) Absolute Maximum Ratings Item Symbol Ratings Units Operating temperature TOPR -20~+65 °C Storage temperature TSTG -40~+125 °C Power supply current VCC max. -0.3~+7.5 V Power consumption Pd DIP : 750, SOP : 450 mW Operating voltage Vop +2.0~+5.0 V MITSUMI Electrical Characteristics IC for Headphone Stereos (bass boost) LAG668 (Except where noted otherwise, Ta=25°C) Item Symbol Measurement conditions Consumption current ICC VIN=0v, IM=0mA Preamp unit (Ta=25°C) Open-circuit gain Gvo VO=-10dBm, RL=infinite Closed-circuit gain Gvc VO=-10dBm Maximum output voltage Vom THD=10% Total harmonic distortion ratio THD VOUT=400mVrms Output noise voltage Vno VIN=0, Rg=2.2k, BPF (30~20kHz) Input impedance ZIN VOUT=-10dBm Crosstalk between channels C.T Rg=2.2k, VOUT=-10dBm Output voltage with pre off Vooff VIN=100mVrms Output resistance with pre off Rooff Input resistance on pre off Rioff Attenuator unit (Ta=25°C) Maximum input voltage Vi max. Maximum attenuation Va max. Vcont=min. Attenuation error Vaerr Vcont=max. Input impedance ZIN Control pin input resistance Zicot Power amp unit (Ta=25°C) Voltage gain Gv POUT=5mW Voltage gain difference Gv Vcont=max. between channels Maximum output power I Pom1 THD=10%, RL=32Ω Maximum output power II Pom2 THD=10%, RL=16Ω Total harmonic distortion ratio THD POUT=5mW Crosstalk between channels C.T POUT=5mW Output noise voltage Vn Rg=2.2k, Vcont=max. Ripple rejection RR VCC=3V, 100Hz, 100mVp-p Noise of preamp + power amp + B.B. Vnto VIN=0, Rg=2.2k, Vcont=max. 1 Motor control unit (Ta=25°C) Consumption current IMC Startup current IMS Reference voltage Vref Between RML-ADJ pins Reference voltage fluctuation I Vref1 VCC between 2.1 and 5.0 V Reference voltage fluctuation II Vref2 IM between 25 and 250 mA Reference voltage fluctuation III Vref3 Ta between -10 and 50°C Current coefficient K Current coefficient fluctuation I K1 VCC between 2.1 and 5.0 V Current coefficient fluctuation II K2 IM between 25 and 250 mA Current coefficient fluctuation III K3 Ta between -10 and 50°C Output voltage on forced on VCEsa IM=200mA, 14PIN=VCC Input resistance on forced on Rion Leakage current on forced off IML Input resistance on forced off Ricon Conditions unless stated otherwise Amp unit: VCC=3.0V, f=1kHz, RL=16Ω, Pre OFF=OPEN Motor unit: VCC=3.0V, IM=100mA, Motor unit: (Mitsumi model) Note 1: Bass boost circuit constants are based on application circuit diagrams. Note 2: Motor pin voltage fluctuations Min. 40 0.45 18 30 72 42 0.6 0.05 150 22 10 10 dB dB Vrms 0.5 % 300 µVrms kΩ dB -50 dB kΩ kΩ 44 0.2 66 Vrms dB dB kΩ kΩ 0 200 100 36 20 30 20 31 * * Typ. Max. Units 18 25 mA 500 0.72 32 38 40 dB 0 3 dB 28 0.5 30 1.0 37 3.0 2.0 3.0 5.0 0.80 0.05 0.01 0.01 38 0.5 0.05 0.02 5.6 33 2.0 6.0 mW mW % dB mVrms dB mVrms mA mA 0.87 V %/V %/mA %/°C 43 %/V %/mA %/°C 0.6 V kΩ 200 µA kΩ MITSUMI Block Diagram IC for Headphone Stereos (bass boost) LAG668 IC for Headphone Stereos (bass boost) LAG668 MITSUMI Application Circuits Power amp gain (dB) Bass Boost Power Amp Gain GV 40 GVH 35 3dB 30 B•B ON 25 3dB GVL B•B Off 15 101 102 f1 103 104 105 106 f2 Frequency (Hz) GV : Power amp gain GVH : Bass boost power amp gain (high level) GVL : Bass boost power amp gain (low level, or boost off) f1, f2: Cutoff frequencies GVH=GV+20Log GVL=GV+20Log f1= R3 ( R1+R3 ( (dB) R1 (dB) ( R2//R3 R2//R3+ R1 ( 1 2π ((R1//R3) +R2)C 1 f2= 2πR2C (Hz) (Hz) IC for Headphone Stereos (bass boost) LAG668 MITSUMI Characteristics (Bass boost) Power amp gain (dB) Recommended constants 40 R1=33kΩ GVH=37dB 35 R2=4.7kΩ GVL=20dB 30 R3=180kΩ f1=50Hz 25 C=0.1µF 20 15 101 f2=340Hz No R4 or C2 102 103 104 105 106 Frequency (Hz) Power amp gain (dB) Bass boost efficiency 40 R1=12kΩ GVH=37dB 35 R2=2.2kΩ GVL=20dB 30 R3=180kΩ f1=130Hz 25 C=0.1µF f2=720Hz 20 15 101 No R4 or C2 102 103 104 105 106 Frequency (Hz) Power amp gain (dB) Response for poor headphone and cassette head characteristics 40 R1=33kΩ GVH=37dB 35 R2=6.8kΩ GVL=23dB 30 R3=180kΩ f1=50Hz 25 C=0.1µF f2=230Hz 20 15 101 No R4 or C2 102 103 104 105 106 Frequency (Hz) Power amp gain (dB) Bass + treble boost 40 R1=33kΩ GVH=37dB 35 R2=4.7kΩ GVL=20dB 30 R3=180kΩ f1=50Hz 25 C=0.1µF f2=340Hz R4=20kΩ GVH=27dB 20 15 101 C2=390pF 102 103 104 Frequency (Hz) 105 106 LAG668 LINEAR INTEGRATED CIRCUIT RADIO AND CASSETTE RECORDER CIRCUIT DESCRIPTION The Contek LAG668 is a monolithic integrated circuit, designed for portable radio cassette. FEATURES *1-Chip IC for headphone stereo SOP-28 BLOCK DIAGRAM 27 26 25 24 23 22 21 19 20 18 14 17 16 15 13 Power Amp Pre Amp Attenuator Motor Control Bias Control 1/2 Vcc 1/2 Vcc V/I Power Amp Pre Amp 1 2 3 28 Attenuator 4 5 6 Power Amp 7 8 9 11 10 Contek Microelectronics Co.,Ltd. CONTEK http://www.contek-ic.com E-mail:[email protected] 12 1 LAG668 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION V BPRE 1 28 GND PRE 1IN+ 2 27 2IN+ 1IN- 3 26 2IN- INF PRF 4 25 2NF PRE IOUT PRE 5 24 2OUT PRE ATT1 6 23 ATT2 CON VOL 7 22 PRE OFF V REF 8 1OUT P Contek LAG668 21 V CCPRE 9 20 V CC GND P 10 19 2OUT P V BP 11 18 MO OFF GND MD 12 17 V CCMO V CON 13 16 CON T MO ON 14 15 CON S PIN NO. SYMBOL DESCRIPTION PIN NO. SYMBOL DESCRIPTION 1 VBPRE Pre Amp Bias Voltage 15 CONS Speed Control 2 1 IN+ Channel 1 + Input 16 CONT Torqul Control 3 1 IN - Channel 1 - Input 17 VCCMO Motor Power Control 4 1 NFPRE Feedback 1 18 MOOFF Motor Forced Stop 5 1 OUTPRE Pre Amp Output 1 19 2 OUTP Power Amp Output 2 6 ATT 1 Attenuator 1 20 VCC Supply Voltage 7 CONVOL Volume Control 21 VCCPRE Supply Voltage 8 VREF Reference Voltage 22 PREOFF Pre Amp Off 9 1 OUTP Power Amp Output 1 23 ATT 2 Attenuator 2 10 GNDP Power GND 24 2 OUTPRE Pre Amp Output 2 11 VBP Power Amp Bias Voltage 25 2 NFPRE Feedback 2 12 GNDMD Motor GND 26 2 IN- Channel 2 - Input 13 VCON Motor Control Voltage 27 2 IN+ Channel 2 + Input 14 MOON Motor Forced Start 28 GNDPRE Pre GND Contek Microelectronics Co.,Ltd. CONTEK http://www.contek-ic.com E-mail:[email protected] 2 LAG668 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25 PARAMETER Supply Voltage Power Dissipation Operating Voltage Operating Temperature Storage Temperature C) SYMBOL VALUE UNIT Vcc Pd Vop Topr Tstg -0.3~+7.5 750 2~5 -20~+65 -40~+125 V mW V C C AMPLIFIER ELECTRICAL CHARACTERISTICS(Ta=25 PARAMETER Supply Current PRE-AMPLIFIER Open Loop Gain Close Loop Gain Maximum Output Voltage Total Harmonic Distortion Output Noise Voltage Input Impedance Cross Talk between CH Output Voltage when Pre-Off Output Impedance when Pre-Off Input Impedance when Pre-Off Attenuator Maximum Input Voltage Maximum Attenuation Attenuation Error Input Impedance Control Ternimal Input Impedance Power Amplifier Voltage Gain Channel Voltage Difference Maximum Output Power I Maximum Output Power II Total Harmonic Distortion Cross Talk between CH Output Noise Voltage Ripple Rejection Pre + Pulse Boost + Power Noise C) SYMBOL TEST CONDITIONS Icc Vin=0V, IM=0mA Gvo Gvc Vom THD Von Vo=-10dBm, RL= Vo=-10dBm THD=10% Vout=100mVrms Vin=0, Rg=2.2k, BPF(30~20k) Vout=-10dBm Rg=2.2k, Vout=-10dBm Vin=100mVrms Zin CT Vooff Rooff Rloff Vimax Vamax Vaerr Zia Zicot GV DGV Pom 1 Pom 2 THD CT Von RR Vnto MIN 40 0.45 18 30 TYP MAX UNIT 18 25 mA 72 42 0.6 0.05 150 0.5 300 22 -50 10 10 Vcont=Min Vcont=Max Pout=5mW Vcont=Max THD=10%, RL=32W THD=10%, RL=16W Pout=5mW Pout=5mW Rg=2.2k, Vcont=Max Vcc=3V, 100Hz, 100mVp-p Vin=0V, Rg=2.2k, Vcont=Max* *Vcc=3V, f=1kHz, RL=16W, unless otherwise specified. 0.2 66 0 36 20 30 20 31 38 0 28 40 3 0.5 30 1 37 3 2 http://www.contek-ic.com E-mail:[email protected] dB dB Vrms % mVrms kW dB dB kW kW Vrms dB dB kW kW 200 100 Contek Microelectronics Co.,Ltd. CONTEK 44 2 6 dB dB mW mW % dB mVrms dB mVrms 3 LAG668 LINEAR INTEGRATED CIRCUIT MOTOR ELECTRICAL CHARACTERISTICS(Ta=25 PARAMETER SYMBOL Current Consumption Starting Current Reference Voltage Reference Voltage Change I Reference Voltage Change II Reference Voltage Change III Current Factor Current Factor Change I Current Factor Change II Current Factor Change III Saturation Voltage at Forced ON Input Impedance at Forced ON Pin Leakage Current at Forced OFF Input Impedance at Forced OFF Pin IMC IMS Vref Vref 1 Vref 2 Vref 3 K K1 K2 K3 VCEsa Rion C) TEST CONDITIONS MIN 500 0.72 Vcc=2.1~5V Im=25~250mA Ta=-10~50 C 32 Vcc=2.1~5V Im=25~250mA Ta=-10~50 C IM=200mA, Pin 14=Vcc IML Ricon TYP MAX UNIT 3 5 0.8 0.05 0.01 0.01 38 0.5 0.05 0.02 0.87 mA mA V %/V %/mA %/ C 0.6 5.6 200 33 Contek Microelectronics Co.,Ltd. CONTEK 43 http://www.contek-ic.com E-mail:[email protected] %/V %/mA %/ C V KW mA KW 4 LAG668 LINEAR INTEGRATED CIRCUIT TEST CIRCUIT 1 NOTE1 : SW12,SW12 R1,R =33kW R2,R2 =5.1kW R3,R3 =200kW R2,R2,=5.1kW C1,C =0.1mF NOTE2 : See figure 1/2 for SW Contek Microelectronics Co.,Ltd. CONTEK http://www.contek-ic.com E-mail:[email protected] 5 LAG668 LINEAR INTEGRATED CIRCUIT TEST CIRCUIT 2 Contek Microelectronics Co.,Ltd. CONTEK http://www.contek-ic.com E-mail:[email protected] 6 LAG668 LINEAR INTEGRATED CIRCUIT FIGURE 1 Item Symbol SW No. TEST CONDITION 1 2 3,3 4 5 6 7 8 9 10 11 12,12 13,13 Vcc=3V,f=1kHz,RL=16W c c a b b a b b b a a a a Im=0mA b b b b b a b b b a a b b Vo=244mV b b b b b a a b b a a b b THD=10% b b b b b a b b b a a b b Vo=400mV c c b b b a b b b a a b b B.P.F.(30-20kHz) b-c c-b b b b a b b b a a b b Vo=244mV b b b a b a b b b a a b b Vin=100mV a a c a b a b b b a a b a Vr=Min, THD=10%, a a c a b a b b b a a b a a a c a b a b b b a a b a Pout=5mV a a c a b a b b b a a b a VR=MAX a a c a b b a b b a a b a RL=32W,THD=10% a a c a a a b b b a a b a RL=16W,THD=10% AMP Supply Icc Current Pre AMP Open Loop Gvo Gain Maximum Vom Output Voltage Total THD Harmonic Distortion Output Von Noise Voltage Cross Talk CT between CH Output Vooff Voltage when PreOff Attenuator Maximum Vimax Input Voltage Maximum Vamax Attenuation Power AMP Voltage GV Gain Channel GV Voltage Difference Maximum Pom 1 Output Power I Maximum Output Pom 2 Power II Contek Microelectronics Co.,Ltd. CONTEK http://www.contek-ic.com E-mail:[email protected] 7 LAG668 LINEAR INTEGRATED CIRCUIT FIGURE 2 Item Symbol SW No. TEST CONDITION 1 2 3,3 4 5 6 7 8 9 10 11 12,12 13,13 a c c a b a b b b a a b a Pout=5mV a-c c-a c a b a b b b a a b a Pout=5mV c c c b b a b b b a a b a VR=MIN c c b a b a b b b a a b b VR=MAX c c a b b a b b b a a b a VR=MAX, BB ON c c a a b a b a b a a a a Im=0mA c c a a b a b a b a a a a c c a a b a b a b a a a a Im=100mA c c a a b a b a b a a a a Im=100mA,Vcc=2.1-5V c c a a b a b a b a a a a Vcc=3V,Im=25-250mA c c a a b a b a b a a a a Im=200mA c c a a a a b a b a a a a POWER AMP Total THD Harmonic Distortion Cross Talk CT between CH Output Von Noise Voltage Ripple RR Rejection Pre + Pulse Vnto Boost + Power Noise Motor Current IMC Consumption Starting IMS Current Reference Vref Voltage Reference Vref 1 Voltage Change I Reference Vref 2 Voltage Change II Saturation VCEsa Voltage at Forced ON Input Ricon Impedance at Forced OFF Pin *Note: a=ON, b=OFF Contek Microelectronics Co.,Ltd. CONTEK http://www.contek-ic.com E-mail:[email protected] 8