BD3860K Audio ICs Built-in BBEΙΙ Audio sound controller BD3860K BD3860K can reproduce clear sound in high band and distinct sound in low band by integrating BBEΙΙ function. If this IC is used for car stereo, sound can be reproduced distinctly without turning up the volume. !Applications Car audio, Mini component, Micro component. !Features 1) Built-in BBEΙΙ circuit, 4-input selector (4ch stereo), input gain, main volume, loudness, tone (2 band), fader volume. 2) BBEΙΙ circuit is profitable for S/N because of no process control in no signal. 3) Bi-CMOS process is suitable for the design of low current and energy saving. It provides more quality for small scale regulator and heat in a set. 4) Q factor, center frequency f0, and gain G of bass can be controlled by external parts. These functions can be used as super bass filter. 5) Can be controlled by power supply of 3.3V or 5V. 6) Easy to design signal level diagram by laying BBEΙΙ, and tone circuit through main volume. 7) Easy layout of the board by laying each pin of audio input (total 8pin), and audio output (total 4pin) together. !Absolute maximum ratings (Ta=25°C) Parameter Symbol Power supply voltage VCC Power dissipation Pd Limits Unit 10 850∗ mW V Operating temperature Topr −40~+85 °C Storage temperature Tstg −55~+125 °C ∗Reduced by 8.5mW for each increase in Ta of 1°C over 25°C. !Recommended operating conditions (Ta=25°C) Parameter Power supply voltage Symbol Min. Typ. Max. Unit VCC 7.0 − 9.5 V 1/26 + + + + + INPUT CH2 SOURCE + INPUT CH1 SOURCE + 4 3 2 1 44 43 42 41 D2 C2 B2 A2 D1 C1 B1 A1 6 5 VCC 9 SELECTOR INPUT POWER SUPPLY FIL + GND VCC 40 SEL2 39 0to18dB INPUT GAIN 0to18dB INPUT GAIN SEL1 + 36 35 LOUD1 VIN2 38 37 LOUD2 MAIN VOLUME 0to−48dB LOUDNESS MAIN VOLUME 0to−48dB LOUDNESS VIN1 25 24 26 23 22 21 HF2 LF2 DET2 VCA2 MIX2 BBOUT2 LO CONTOUR (f=100Hz) 5dB PROCESS CONTROL +3to12dB (f=10kHz) BBEΙΙ LOGIC LO CONTOUR (f=100Hz) 5dB PROCESS CONTROL +3to12dB (f=10kHz) BBEΙΙ 34 33 28 32 31 30 HF1 LF1 DET1 VCA1 MIX1 BBOUT1 + + + GND TIN2 20 TNF2 18 BNF2 17 16 BOUT2 −14to+14dB −140to+14dB 14 BOUT1 BASS 15 TREBLE BNF1 −14to+14dB 19 −14to+14dB TNF1 BASS 29 TREBLE TIN1 FADER CH2 FRONT 0to−54dB FADER CH2 REAR 0to−54dB FADER CHI REAR 0to−54dB FADER CHI FRONT 0to−54dB 11 10 27 8 7 12 13 OUTF2 OUTR2 DEF SC SI OUTR1 OUTF1 OUTPUT CH2 SC SI OUTPUT CH1 BD3860K Audio ICs !Block diagram + + 2/26 BD3860K Audio ICs !Pin descriptions Pin No. Pin name Pin No. Pin name 1 A2 CH2 input pin A Function 23 VCA2 CH2 high pass VCA output pin 2 B2 CH2 input pin B 24 LF2 CH2 Low pass filter setting pin 3 C2 CH2 input pin C 25 HF2 CH2 high pass filter setting pin 4 D2 CH2 input pin D 26 DET2 CH2 high pass attack / release time setting pin 5 FIL 1/2 VCC pin 27 DEF BBE ΙΙ ON/OFF switching time constant pin 6 GND Ground pin 28 DET1 CH1 high pass attack / release time setting pin 7 SI Serial data receiving pin 29 TIN1 CH1 Treble input pin Function CH1 BBE ΙΙ signal output pin Serial clock receiving pin 30 BBOUT1 Power supply pin 31 MIX1 CH1 output MIX amplifier inverse input pin OUTR2 CH2 Rear output pin 32 VCA1 CH1 high pass VCA output pin 11 OUTF2 CH2 Front output pin 33 LF1 CH1 low pass filter setting pin 12 OUTR1 CH1 Rear output pin 34 HF1 CH1 high pass filter setting pin 13 OUTF1 CH1 Front output pin 35 LOUD1 CH1 Loudness filter setting pin 14 BOUT1 CH1 Bass filter setting pin 36 VIN1 15 BNF1 CH1 Bass filter setting pin 37 LOUD2 16 BOUT2 CH2 Bass filter setting pin 38 VIN2 CH2 main volume input pin 17 BNF2 CH2 Bass filter setting pin 39 SEL2 CH2 input gain output pin SEL1 CH1 input gain output pin 8 SC 9 VCC 10 CH1 main volume input pin CH2 Loudness filter setting pin 18 TNF2 CH2 Treble filter setting pin 40 19 TNF1 CH1 Treble filter setting pin 41 A1 CH1 input pin A 20 TIN2 CH2 Treble input pin 42 B1 CH1 input pin B CH2 BBE ΙΙ signal output pin 43 C1 CH1 input pin C CH2 output MIX amplifier inverse input pin 44 D1 CH1 input pin D 21 BBOUT2 22 MIX2 3/26 BD3860K Audio ICs !Pin equivalent circuit and description Pin No. Pin name Pin voltage Equivalent circuit Pin description VCC 41 42 43 44 1 2 3 4 A1 B1 C1 D1 A2 B2 C2 D2 A pin for inputting a sound signal. It is suitable for input of CD, MD, tuner and tape. Connect this pin to a front stage circuit through a coupling capacitor. 4.5V GND VCC 40 A pin for outputting a sound signal, which has been selected by an input selector and amplified by input gain. Connect this pin to a rear stage circuit through a coupling capacitor between the VIN1 and VIN2 pins. SEL1 4.5V 39 SEL2 GND VCC 36 A pin for inputting a sound signal to main volume. The input impedance is 60kΩ (upon typical setting). Connect this pin to a front stage circuit through a coupling capacitor between the SEL1 and SEL2 pins circuit. VIN1 4.5V 38 VIN2 GND VCC VIN1, VIN2 35 LOUD1 4.5V 37 −30dB tap LOUD2 A pin for setting the loudness frequency characteristics and gain. GND 4/26 BD3860K Audio ICs Pin No. Pin name Pin voltage Equivalent circuit Pin description VCC 33 LF1 10.6k A pin for setting the low pass frequency of BBE ΙΙ. 4.5V 24 LF2 GND VCC 34 HF1 4.5V 25 A pin for setting the high pass frequency of BBE ΙΙ. 12.7k 12.7k HF2 GND VCC 32 VCA1 A pin for outputting the high pass VCA of BBE ΙΙ. Connect the HPF capacitor between the MIX1 and MIX2 pins 2.85k 4.5V 23 VCA2 GND VCC 10k 31 10k MIX1 4.7k 4.5V 22 MIX2 10k A pin for inverse input for output MIX amplifier of BBE ΙΙ. Connect the HPF capacitor between the VCA1 and VCA2 pins, and the LPF capacitor between the BBOUT1 and BBOUT2 pins. GND 5/26 BD3860K Audio ICs Pin No. Pin name Pin voltage Equivalent circuit Pin description VCC 30 BBOUT1 10k 4.5V 21 BBOUT2 A pin for outputting the BBE ΙΙ signal. Connect the LPF capacitor between the MIX1 and MIX2 pins and connect this pin to a rear stage circuit through a coupling capacitor between the TIN1 and TIN2 pins. GND VCC 29 A pin for inputting a sound signal to Treble. The input impedance is 47kΩ (upon typical setting). Connect this pin to a front circuit through a coupling capacitor between the BBOUT1 and BBOUT2 pins. TIN1 4.5V 20 47k TIN2 GND VCC 28 DET1 A pin for time constant of high pass boost detector of BBE ΙΙ . Attack/Recovery time depends on the external capacitor and resistance. 20k − 26 DET2 GND VCC 500k 27 DEF − A pin for ON/OFF switching time constant of BBE ΙΙ . Timing constant "T" depends on the external capacitor "C" and internal resistance "R" (upon typical setting). T=CR (sec) GND 6/26 BD3860K Audio ICs Pin No. Pin name Pin voltage Equivalent circuit Pin description VCC 19 TNF1 A pin for setting Treble frequency characteristic. 4.5V 18 TNF2 GND VCC 15 BNF1 A pin for setting Bass frequency characteristic and gain. 4.5V 17 BNF2 GND VCC 14 BOUT1 A pin for setting Bass frequency and gain. 4.5V 16 BOUT2 GND VCC 13 OUTF1 12 OUTR1 11 OUTF2 10 OUTR2 A pin for outputting a sound signal. Connect this pin to a rear stage circut through a coupling capacitor. 4.5V GND 7/26 BD3860K Audio ICs Pin No. Pin name Pin voltage Equivalent circuit Pin description VCC 8 SC − A pin for inputting a serial data. GND VCC 7 SI − A pin for inputting a serial clock. GND VCC 25k 5 FIL 4.5V 25k 1/2 VCC. Voltage for power supply of signal system. GND 9 VCC 9V − Power supply pin. 6 GND 0V − A ground pin. 8/26 BD3860K Audio ICs !Electrical characteristics (Unless specified particularly, Ta=25°C, VCC=9V, f=1kHz, RL=10kΩ, input gain 0dB, main volume 0dB, BBEΙΙ off, tone 0dB, fader volume 0dB, and the signal is inputted from A1 pin, and outputted to OUTF1 pin.) Symbol Min. Typ. Max. Unit Circuit current IQ − 16 35 mA Output voltage gain GV −1.5 0 1.5 Full harmonic distortion rate THD − 0.01 Maximum output voltage VOM 2.0 No − Parameter Conditions Serial data SW Measurement point 003 1 IQ 001 003 2 VOUT 002 001 003 2 THD 000 002 001 003 2 VOUT 000 002 001 003 1 VOUT VOUT (OUTF2) (1) (2) (3) (4) No signal 000 002 001 dB VIN=1Vrms 000 002 0.09 % VIN=2Vrms, 400~30kHz 000 2.5 − Vrms THD=1% 5 17 µVrms Rg=0Ω, IHF−A ∗ <General> Output noise voltage Cross-talk between channels VIN=1Vrms (A1), Rg=0Ω (A2), IHF−A ∗ 000 002 001 003 00B 2 (A1) 1 (A2) − − − − − − VIN=200mVrms 018 002 001 003 2 VOUT dB VIN=200mVrms − − − − − − −46 dB VIN=1Vrms 000 1CA 001 003 2 VOUT 0 1 dB 0to−30dB, VIN=1Vrms − − − − − − −2 0 2 dB −32to−48dB, VIN=1Vrms − − − − − − V1MI − −95 −85 dB VIN=1Vrms, IHF−A ∗ 000 02A 001 003 2 VOUT Process control range GBBH 10 12 14 dB f=10kHz, VIN=200mVrms 000 002 199 003 2 VOUT Process set error BBHE −2 0 2 dB f=10kHz, VIN=200mVrms − − − − − − 003 2 VOUT CTC − −95 −70 dB RI 33 47 61 kΩ Input maximum gain GVI 16.5 18 19.5 dB Input gain error ISET −1.5 0 1.5 Volume control range V1R −50 −48 Volume set error 1 V1E1 −1 Volume set error 2 V1E2 Maximum attenuation Input resistance <Input gain> <Main volume> <BBEΙΙ> GBBL 3 5 7 dB f=100Hz, VIN=200mVrms 000 002 019 119 099 199 Bass boost range GBB 12 14 16 dB f=500Hz, VIN=200mVrms 000 002 1C1 003 2 VOUT Bass cut range GBC −16 −14 −12 dB f=500Hz, VIN=200mVrms 000 002 1E1 003 2 VOUT Bass set error BSET −2 0 2 dB f=500Hz, VIN=200mVrms − − − − − − GTB 12 14 16 dB f=10kHz, VIN=200mVrms 000 002 1D1 003 2 VOUT 000 002 1F1 003 2 VOUT − − − − − − LO CONTOUR voltage gain <Bass> <Treble> Treble boost range Treble cut range GTC −16 −14 −12 dB f=10kHz, VIN=200mVrms Treble set error TSET −2 0 2 dB f=10Hz, VIN=200mVrms Fader control range V2R −57 −54 −51 dB VIN=1Vrms 000 002 001 1B3 2 VOUT Fader set error V2E −2 0 2 dB VIN=1Vrms − − − − − − dB VIN=1Vrms, IHF−A ∗ 000 002 001 073 2 VOUT <Fader> Maximum attenuation V2MI − −90 −85 VP-9690A (Average value detection, effective value display) IHF-A filter by Matsushita Communication is used for ∗ measurment. Operation spec : Phase between input / output is same. Design against radiation-proof is not mode. 9/26 BD3860K Audio ICs !Measurement circuit 220p 0.047µ ∗ 0.02µ ∗ 1µ + 0.01µ ∗ ∗ 10µ + ∗ 32 31 30 29 ∗ 1µ + ∗ 0.01µ 0.1µ ∗ ∗ 1M 1M 33 ∗ 28 27 26 25 24 23 ∗ 0.047µ ∗ 220p 0.01µ ∗ 34 22 35 21 ∗ 0.1µ 6.8k ∗ ∗ ∗ 470p 200k ∗ 0.1µ 6.8k ∗ ∗ ∗ 10µ + 36 20 37 19 0.047µ 470p 200k 18 38 + + 10µ 10µ BD3860K 39 A1 B1 C1 D1 + 10µ + 10µ + 10µ 17 40 16 41 15 42 14 43 13 ∗ 0.033µ ∗ 3.3k ∗ ∗ 0.033µ 0.033µ ∗ 3.3k ∗ ∗ 0.033µ + 10µ 10k + 12 44 10µ + 10µ 10k 1 + A1~D2 2 + 10µ SW A2 Rg=0 ∗ 0.047µ 3 + 10µ B2 4 + 10µ C2 5 6 7 8 + 10µ D2 9 IQ 47µ GND SI VIN SC VCC 10 OUTF1 OUTR1 OUTF2 OUTR2 11 + + 10µ 10µ 10k 10k RL=10k OUTF1~OUTR2 VOUT THD Fig.1 MEASUREMENT CIRCUIT DIAGRAM Recommendable external parts Notes on wiring 1. Element marked with ∗ · Carbon-film resistor : ±1% · Film capacitor : ±1% : ±1% · Ceramic capacitor 1. GND shall be wired solidly. 2. Unless specified particularly, use the following external parts: 3. Lines of SI and SC of shall not be parallel if possible. The lines shall be shielded, if they are adjacent to each other. · Carbon-film resistor : ±5% · Film capacitor : ±20% · Electrolytic capacitor : ±20% 2. Wiring patter of SI and SC shall be away from that of analog unit and crosstalk shall not be acceptable. 10/26 BD3860K Audio ICs !Circuit operations Specifications for control signal (1) Timing of control signal • Data is read at a leading edge of clock. • Latch is read at a trailing edge of clock. • Be sure to set SI to LOW after latching. 90% 90% tsc twc SC ( CLOCK Signal ) 10% ts thd SI DATA Signal LATCH Signal 90% 90% twd DATA 90% 90% 10% 10% twc th tsd thd ts1 90% 90% tw1 twh 10% 10% th1 DATA 10% 90% LATCH Fig.2 Constant of timing chart (Ta=25°C, VCC=9V) Parameter Symbol Min. Typ. Max. Unit "High" input voltage VIH 2.6 − 5.5 V "Low" input voltage VIL 0 − 1.1 V Clock width Twc 2.0 − − µs Data width twd 2.0 − − µs Latch width tw1 2.0 − − µs "Low" hold width Twh 2.0 − − µs Setup time (DATA→CLK) Tsd 1.0 − − µs Hold time (CLK→DATA) Thd 1.0 − − µs Setup time (CLK→LATCH) ts1 1.0 − − µs Hold time (CLK→LATCH) th1 1.0 − − µs "Low" setup time Ts 1.0 − − µs "Low" hold time Th 1.0 − − µs 11/26 BD3860K Audio ICs (2) Control data format list Input direction ←MSB D10 0 D20 LSB D11 D12 D13 D14 Input selector 00 : INA, 10 : INB 01 : INC, 11 : IND D21 D15 D16 D17 Loudness 0 : OFF 1 : ON Input gain (Refer to a setting table) D22 D23 D24 D25 D26 D27 Main volume select 0 : ch1 1 : ch2 Main volume 0 (Refer to a setting table) D30 D31 D32 D33 D34 D35 (Refer to a setting table) D40 D41 D42 D43 D44 D45 D46 0 D47 Fader select 00 : Front 1 10 : Front 2 01 : Rear 1 11 : Rear 2 Fader volume 0 D37 Bass / Treble / BBE ΙΙ Select 00 : Bass 10 : Treble 01 : BBE OFF 11 : BBE ON Bass / Treble / BBE ΙΙ Gain 0 D36 (Refer to a setting table) D18 D19 Select address 0 0 D28 D29 Select address 1 0 D38 D39 Select address 0 1 D48 D49 Select address 1 1 Any of four control data formats can be selected by changing setting of select address. Initialize all the four formats of data at every turning on the power supply. (Example) Input direction ← MSB LSB Data MSB L LSB Data MSB L Data LSB MSB L Data LSB L "L" means "Latch". At the second time after turning on the power suopply, set any data to be changed. (Example) To change the main volume. Input direction ← MSB LSB Data L "L" means "Latch". 12/26 BD3860K Audio ICs (3) Control data format ① setting table Input select D10 0 Input Input gain D11 D12 Gain Loudness D13 D14 D15 Select address D17 D16 INA 0 0 0dB 0 0 0 0 OFF 0 INB 1 0 1dB 1 0 0 0 ON 1 INC 0 1 2dB 0 1 0 0 IND 1 1 3dB 1 1 0 0 4dB 0 0 1 0 5dB 1 0 1 0 6dB 0 1 1 0 8dB 1 1 1 0 10dB 0 0 0 1 12dB 1 0 0 1 14dB 0 1 0 1 16dB 1 1 0 1 18dB 0 0 1 1 D18 D19 0 0 Note: It is set to 18dB upon any data combination other than the above-mentioned. 13/26 BD3860K Audio ICs (4) Control data format ② setting table Main volume select Main volume attenuation D20 0 ATT D21 D22 D23 D24 D25 D26 D27 −0dB 0 0 0 0 0 0 CH1 0 −1dB 1 0 0 0 0 0 CH2 1 −2dB 0 1 0 0 0 0 −3dB 1 1 0 0 0 0 −4dB 0 0 1 0 0 0 −5dB 1 0 1 0 0 0 −6dB 0 1 1 0 0 0 −7dB 1 1 1 0 0 0 −8dB 0 0 0 1 0 0 −9dB 1 0 0 1 0 0 −10dB 0 1 0 1 0 0 −11dB 1 1 0 1 0 0 −12dB 0 0 1 1 0 0 −13dB 1 0 1 1 0 0 −14dB 0 1 1 1 0 0 −15dB 1 1 1 1 0 0 −16dB 0 0 0 0 1 0 −17dB 1 0 0 0 1 0 −18dB 0 1 0 0 1 0 −19dB 1 1 0 0 1 0 −20dB 0 0 1 0 1 0 −21dB 1 0 1 0 1 0 −22dB 0 1 1 0 1 0 −23dB 1 1 1 0 1 0 −24dB 0 0 0 1 1 0 −25dB 1 0 0 1 1 0 −26dB 0 1 0 1 1 0 −27dB 1 1 0 1 1 0 −28dB 0 0 1 1 1 0 −29dB 1 0 1 1 1 0 −30dB 0 1 1 1 1 0 −32dB 1 1 1 1 1 0 −34dB 0 0 0 0 0 1 −36dB 1 0 0 0 0 1 −38dB 0 1 0 0 0 1 −40dB 1 1 0 0 0 1 −42dB 0 0 1 0 0 1 −44dB 1 0 1 0 0 1 −46dB 0 1 1 0 0 1 −48dB 1 1 1 0 0 1 −∞ 0 0 0 1 0 1 Select address D28 D29 1 0 Note: It is set to −∞ upon any data combination other than the above-mentioned. 14/26 BD3860K Audio ICs (5) Control data format ③ setting table Bass, Treble BBE ΙΙ select Tone gain (Bass, Treble) D31 D32 D33 Gain D30 0 Select address D35 D36 D34 0dB 0 0 0 0 Bass 0 0 2dB 1 0 0 0 Treble 1 0 4dB 0 1 0 0 1 1 1 0 0 BBE OFF 0 6dB 8dB 0 0 1 0 BBE ON 1 1 10dB 1 0 1 0 12dB 0 1 1 0 14dB 1 1 1 0 0dB 0 0 0 1 −2dB 1 0 0 1 −4dB 0 1 0 1 −6dB 1 1 0 1 −8dB 0 0 1 1 −10dB 1 0 1 1 −12dB 0 1 1 1 −14dB 1 1 1 1 D37 D38 D39 0 0 1 BBEΙΙ gain Gain LOW HIGH (f=100Hz) (f=10kHz) D31 D32 D33 D34 5dB 3dB 0 0 ∗ ∗ 5dB 6dB 1 0 ∗ ∗ 5dB 9dB 0 1 ∗ ∗ 5dB 12dB 1 1 ∗ ∗ ∗ is 0 or 1 15/26 BD3860K Audio ICs (6) Control data format ④ setting table Fader volume attenuation D40 0 ATT D41 D42 D43 Fader select D44 D45 Select address D46 D47 0dB 0 0 0 0 0 CH1 Front 0 0 −2dB 1 0 0 0 0 CH2 Front 1 0 −4dB 0 1 0 0 0 CH1 Rear 0 1 −6dB 1 1 0 0 0 CH2 Rear 1 1 −8dB 0 0 1 0 0 −10dB 1 0 1 0 0 −12dB 0 1 1 0 0 −14dB 1 1 1 0 0 −16dB 0 0 0 1 0 −18dB 1 0 0 1 0 −20dB 0 1 0 1 0 −22dB 1 1 0 1 0 −24dB 0 0 1 1 0 −26dB 1 0 1 1 0 −28dB 0 1 1 1 0 −30dB 1 1 1 1 0 −32dB 0 0 0 0 1 −34dB 1 0 0 0 1 −36dB 0 1 0 0 1 −38dB 1 1 0 0 1 −40dB 0 0 1 0 1 −42dB 1 0 1 0 1 −44dB 0 1 1 0 1 −46dB 1 1 1 0 1 −48dB 0 0 0 1 1 −50dB 1 0 0 1 1 −52dB 0 1 0 1 1 −54dB 1 1 0 1 1 −∞ 0 0 1 1 1 D48 D49 1 1 Note: It is set to −∞ upon any data combination other than the above-mentioned. 16/26 BD3860K Audio ICs Control set up of tone control filter (1) About bass filter + − IN R3 1 fO = 2π R2 Q= BNF1 BNF2 BOUT1 BOUT2 C1 R1 G = 20log (HZ) R1 (R2+R3) C1C2 R1R2C1C2 R1 (C1+C2) (R2+R3) / R1+2 (dB) R3 / R1+2 C2 ∗ However C1=C2 Fig. 3 Standard value of R2, R3 (reference) (At C1=C2, R1=3.3kΩ) G Bass burst amount Resistance (kΩ) ∗Typ. R2 R3 0dB 0 28.45 2dB 7.22 21.23 4dB 12.94 15.51 6dB 17.70 10.75 8dB 21.41 7.04 10dB 24.34 4.11 12dB 26.64 1.81 14dB 28.45 0 G fO f Fig. 4 ∗ Actual burst amount may be dispositioned somewhat. 17/26 BD3860K Audio ICs (2) About treble filter + − IN OUT fO = 1 R1 G = 20log R2 TNF1 TNF2 Zc = (HZ) 2πR2C 1 jωc R1+R2+ZC (dB) R2+ZC (Ω) C Fig. 5 Standard value of R2, R1 (reference) G Treble burst amount Resistance (kΩ) ∗Typ. R1 R2 0dB 0 16.93 2dB 3.49 13.44 4dB 6.25 10.68 6dB 8.45 8.48 8dB 10.19 6.74 10dB 11.58 5.35 12dB 12.68 4.25 14dB 13.55 3.38 3dB G fO f Fig. 6 ∗ Actual burst amount is dispositioned somewhat. 18/26 BD3860K Audio ICs +20 +10 +15 0 −5 +5 0 −5 −10 −10 −15 −15 −20 10 50 100 500 1k 5k 10k VCC=9V VIN=200mVrms C=0.0047µF +10 +5 GAIN (dB) GAIN (dB) +20 VCC=9V VIN=200mVrms R1=3.3kΩ C1=C2=0.22µF +15 −20 10 100k 50 100 500 1k f(Hz) 5k 10k 100k f(Hz) Fig.7 Bass gain-frequency (reference) characteristics Fig.8 Treble gain-frequency (reference) characteristics Constant set up tone loudness filter MAIN VOLUME LOUDNESS SW −30dB tap + − OUT ON OFF 6.8k(Typ.) VIN1 VIN2 LOUD1 LOUD2 IN R2 C2 C1 Setting for "fcl" Setting for High frequency gain and "fch" Setting for ATT of Main Volume R1=6.8k Fig.9 MAIN VOLTAGE ATT 0dB fcl=1/(2π×C1×R1) Small R2 fch=1/(2π×C2×R2) 3dB Low Gain 14dB Large High Gain 3dB −30dB fcl fch f(Hz) Fig.10 19/26 BD3860K Audio ICs The resistance R1 is used to set for attenuation of main volume at loudness ON. The resistance R1 should be the same 6.8kΩ with inside resistance 6.8kΩ (Typ.) of main volume −30dB tap at loudness OFF. Except this value, the attenuation of main volume at loudness ON is wrong. In the low frequency fully less than “fcl”, the voltage gain is fixed on 14dB (Typ.) by inside constant at attenuation −30dB of main volume. The resistance R2 and the capacitor C2 are used to set for the characteristic in high frequency range. The voltage gain in high frequency range can be changed by the value of R2 like the upper figure. MAIN VOLUME 0dB +0 −10dB −10 ATT (dB) VCC=9V, VIN=1Vrms C1=0.1µF, R1=6.8kΩ C2=470pF, R2=200kΩ −20dB −20 −30dB −30 −40dB −40 10 50 100 500 1k 5k 10k 100k f(Hz) Fig.11 Loudness gain-frequency (reference) characteristics BBEΙΙ explanation of operation BBEΙΙ is a system. This processor treats a loudspeaker and amplifier as an integrated sound system and it exactly reproduces the “rising edge of sound”, which characterizes the sound, though appropriate signal processing at a front stage of amplifier input. This mechanism generates the playback sound almost like natural sound. (1) Problem of sound playback in sound playback system In the nature world, treble harmonics are produced first usually and then basic low-frequency wave is generated. This is the same with an attacking part which characterizes various kinds of sounds of musical instruments. The character of sound is expressed by the frequency upon rising edge of sound and the amplitude which forms an envelope. Therefore, it is very important to express the rising edge of natural sound exactly upon reproducing the sound through sound playback system. In the sound playback system of today, however, and unavoidable mismatch is made between a loudspeaker and amplifier. A transistor power amplifier operates as a constant voltage source because of negative feedback technology, while a loudspeaker is a current device. Therefore, an unavoidable mismatch is made in the system. Moreover, the impedance characteristic of loudspeaker various considerably depending on electric reactance of voice coil or mechanical reactance of cone assembly. As a result, the rising edge of sound is distorted and a phase of playback sound is deflected. Furthermore, increased treble impedance reduces the loudspeaker amplitude and harmonics. Therefore, treble constituent is easy to masked by subsequent high-level middle range constituent and the rising edge of sound becomes to hard to be reproduced so exactly. 20/26 BD3860K Audio ICs (2) Principle of operation BBEΙΙ processes the signals to solve the above-mentioned problem of sound playback system as follows: Phase correction Low range 20 Mid range 150 High range 2.4k 20k f(Hz) Fig. 12 By dividing the input signal into three frequency bands, the bass (20Hz to 150Hz), middle range (150Hz to 2.4kHz) and by combining them, the phase difference 180° is made between the bass and middle range and 360° between the bass and treble. Time delay characteristic in every frequency is adjusted through such phase difference and, therefore, the distortion of rising edge of sound can be minimized. Amplitude correction (Harmonic correction) High-speed detector and high-performance VCA circuit controls the amplitude of treble constituent to keep appropriate audibility balance at the treble which consists of harmonics. Correction value is decided by both operations at two kinds of levels; one level is set up by serial control from an outside source and another one is obtained by detecting an input signal. The amplitude of treble input into VCA is corrected by an internal control signal obtained through such operations. By this amplitude correction, the harmonics is recovered and the definition level of musical instrument or voice can be enhanced. Bass boost The bass constituent is boosted to keep well balance to the treble constituent varying dynamically. The boost is fixed to 5dB (Typ.) at f=100Hz by an internal circuit and it cannot be controlled externally. 21/26 BD3860K Audio ICs (3) Explanation of external constant Characteristic of high frequency filter Frequency characteristic at a maximum process control level is shown in the under-mentioned chart: Gain C1 C1 : Capacitor of VCA1-MIX1 Capacitor of VCA2-MIX2 C2 : Capacitor of MIX1-BBOUT1 Capacitor of MIX2-BBOUT2 C2 Large Small Small Large Lo Contour Process Control f Fig. 13 As shown in the above-mentioned chart, the cut-off frequency of treble constituent is decided by the external capacitors C1 and C2. The frequency characteristic marked with a dotted line varies depending on this value. Balance of harmonics changes and , therefore, it is an important parameter to decide the sound tone. +14 +12 GAIN (dB) +10 VCC=9V VIN=200mVrms VOL=0dB C1=0.047µF C2=470pF PROCESS CONTROL 12dB (f=10kHz) 9dB +8 6dB +6 +4 +2 −0 3dB LO CONTOUR 5dB (f=50Hz) −2 −4 10 50 100 500 1k 5k 10k 100k f(Hz) Fig.14 BBEΙΙ gain-frequency (reference) characteristics Controls the amplitude of treble by input signal level The attack and release time of controls the amplitude of treble can be decided by outside constant. The pins are DET1 (Pin 28) and DET2 (Pin 26). The method of setting is the lower figure. The input signal level started to control the amplitude of treble is fixed on about −40dBV (Typ.) by inside circuit. Therefor, it cannot be change from outside pin. 22/26 BD3860K Audio ICs R1 20k Attack Time : R1 × C Release Time : R2 × C DET1, DET2 + C R2 Fig. 15 VCC=9V +14 f=10kHz VOL=0dB PROCESS12dB +12 C=1µF GAIN (dB) +10 R2=1MΩ PROCESS 9dB +8 +6 PROCESS 6dB +4 PROCESS 3dB +2 BBE OFF 0 −2 −4 −50 −40 −30 −20 −10 0 VIN(dBV) Fig.16 Process control-input voltage (reference) characteristics Time constant at switching ON/OFF At switching ON/OFF, this IC is used to switching of time constant, for measuring against DC offset. The pin for setting is DEF (Pin 27). The method of setting is the lower figure. DEF R=500k T=C×R C Fig.17 23/26 BD3860K Audio ICs !Application example 0.22µ 470p 0.047µ 10µ 1µ + 0.1µ 1µ + 32 31 30 29 0.1µ 1M 1M 33 0.01µ + 28 27 26 25 24 23 0.047µ 0.01µ 6.8k 34 22 35 21 470p 0.1µ 470p 200k 6.8k 10µ + 36 20 37 19 0.0047µ 0.1µ 470p 200k 0.0047µ 18 38 + + 10µ 10µ BD3860K 39 A1 B1 C1 D1 + 10µ 0.22µ 3.3k 40 16 41 15 0.22µ 0.22µ 3.3k + 10µ + 10µ 42 14 43 13 0.22µ OUTF1 + 10µ + 10µ 17 12 44 OUTR1 + 10µ 1 + 2 + 10µ A2 3 + 10µ B2 4 + 10µ C2 5 6 7 8 9 + 10µ 47µ GND D2 VCC SI 10 11 + + 10µ 10µ OUTR2 OUTF2 SC Fig.18 !Operation notes 1. About operation voltage supply range Within operation voltage supply range, basic circuit function operation is guaranteed within operation ambient temp. But please confirm set up of constant and element, voltage set up and temp set up on use. 2. About operation temp range If it within recommended operation voltage range, circuit function operation is guaranteed within operation temp. It corralled to conditions of power dissipation to temp. Please watch out except condition stipulated by electrical characteristics within the range, It cannot guarantee standard value of electrical characteristics. But it retains original function. 24/26 BD3860K Audio ICs 3. About Application circuit Example of application circuit drawing is convinced as recommendable, but please confirm characteristic including above mentioned noticed. At use with modification of external constant, please decide with enough margin considering distribution, ETC of this IC, external parts including quiescence characteristics and excessive characteristics. Please note that we have not yet confirmed any concerned patent rights completely. 4. About power on reset At on of supply voltage circuit made initialization inside IC is built-in. To be concrete, setting is made so that the following table. Please send data to all address as initial data at supply voltage on. And please supply mute at set side until this initial data is sent. Function Initial condition Input selector INA Input gain 0dB Loudness OFF Main volume −∞dB Bass gain 0dB Treble gain 0dB BBE ΙΙ OFF Fader volume −∞dB 5. About 2-wire serial control High-frequency digital signal is inputted into the SC terminal and SI terminal. So wire and print patterns suitably to prevent interference to analog signal system line. 6. About muting When the attenuation of main volume is changed from −48dB to −∞dB, it maybe occur pop noise caused by DC offset. Therefor, to prevent it, please mute by fader volume first of all, and then mute by main volume. Conversely, when the muting is released, please by main volume first of all, and then release by fader volume. 7. About the license of BBE Sound Inc. This IC is manufactured according to the license of BBE Sound Inc. Upon using it, the license agreement with BBE Sound Inc. is required. 8. About setting of main volume in using BBEΙΙ Controls the amplitude of treble of BBEΙΙ are motioned by detecting the signal level after main volume. Therefor, when the signal is attenuated less than about −40dBV (Typ.) in main volume, controls the amplitude of treble cannot be motioned. To attenuation that dose not spoil the controls the amplitude of treble, please use fader volume. 25/26 BD3860K Audio ICs 9. About relation between BBE and the other audio parameter When BBE is ON, please use all flat of tone and loudness. And when you use other processor (SRS/Spatializer/QSound etc.), please plan that BBE places in later in later position. When you use Dolby-Surround or Dolby-ProLogic, it is no problem that BBE places in first position to reduce numbers of channels. But if you cannot apply to Dolby lab. For permission, BBE places in later position. !External dimensions (Units : mm) 14.0 ± 0.3 10.0 ± 0.2 23 22 44 12 2.15 ± 0.1 0.05 1 0.8 11 0.35 ± 0.1 1.2 14.0 ± 0.3 10.0 ± 0.2 33 34 0.15 ± 0.1 0.15 QFP44 26/26 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document use silicon as a basic material. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.0