 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| ICs for Audio Common Use AN7199Z Dual 20 W BTL power IC for car audio s Overview The AN7199Z is an audio power IC developed for the sound output of car audio (dual 20 W). A capacitor and a resistor to stop oscillation are built in between the output pin and GND so that a space saving of set is possible. Also, it is incorporates an industry's first superior muting circuit which is free from shock noise, so that a shock noise design under the set transient condition can be made easily when the muting circuit is used together with its standby function. In addition, it is incorporating various protective circuits to protect the IC from destruction by GND-open short-circuit to GND and power supply surge which are the most important subjects of power IC protection, and the IC will largely contribute to a high reliability design of equipment. 18.000.30 13.500.30 1.500.10 Unit : mm 4.000.20 3.600.10 13.250.30 2.400.50 (1.80) (2.54) 0.25-0.05 +0.15 10.00.30 15.650.50 1 1.27 0.50-0.10 +0.20 15 (0.61) R0.55 (1.95) 19.000.30 19.300.30 HZIP015-P-0745A s Features * Built-in various protection circuits (realizing high breakdown voltage against destruction) Power supply surge breakdown voltage of 80 V or more Ground open breakdown voltage of 16 V or more * Built-in standby function (free from shock noise when STB-on/off) * Built-in muting function Free from shock noise at mute-on/off * Adapting attenuator method so that abnormal sound due to waveform deformation is not generated Attack time, recovery time of 50 ms or less * Reduction in external components No CR for oscillation stop is required It eliminates the need for NF and BS electrolytic capacitors Muting function is unneccesary Power supply choke coil is unnecessary * Provided with beep sound input pin * High sound quality design s Applications * Car audio 18.950.50 3.250.10 1 AN7199Z s Block Diagram VCC ICs for Audio Common Use Ripple filter 12 Ch.1 GND Ch.1 Out (-) 3 4 Att. 1 Ref. 14 13 Ch.2 GND Ch.2 Out (-) Protection Cct. Att. Ch.1 Out (+) 2 Att. 10 6 5 8 15 Att.Con. 11 7 Ch.2 Out (+) Att. 9 Ch.1 In Standby Mute Ch.2 In s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 Description Power supply Ch.1 output (+) Grounding (output ch.1) Ch.1 output (-) Standby Ch.1 input Muting Grounding (sub) Pin No. 9 10 11 12 13 14 15 Description Grounding (input) Beep sound input Ch.2 input Ripple filter Ch.2 output (-) Grounding (output ch.2) Ch.2 output (+) s Absolute Maximum Ratings Parameter Supply voltage *2 *3 Symbol VCC Vsurge ICC Rating 25 60 9.0 59 -30 to +85 -55 to +150 GND(input) GND(sub) Beep In Unit V V A W C C Peak supply voltage Supply current Power dissipation *4 PD *1 Operating ambient temperature Storage temperature Note) *1 : *2 : *3 : *4 : *1 Topr Tstg All items are at Ta = 25C, except for the operating ambient temperature and storage temperature. Without signal Time = 0.2 s Ta = 85C 2 ICs for Audio Common Use s Recommended Operating Range Parameter Supply voltage Symbol VCC Range 8.0 to 18.0 AN7199Z Unit V s Electrical Characteristics at VCC = 13.2 V, f = 1 kHz, Ta = 25C Parameter Quiescent current Standby current Output noise voltage Voltage gain 1 Total harmonic distortion 1 Maximum output power 1 *1 *1 Symbol ICQ ISTB VNO GV1 THD1 PO1 RR CB CT VOff MT Zi GV2 THD2 PO2 VS THD3 Conditions VIN = 0 mV, RL = 4 VIN = 0 mV, RL = 4 Rg = 10 k, RL = 4 VIN = 20 mV, RL = 4 VIN = 20 mV, RL = 4 THD = 10%, RL = 4 VCC = 14.4 V, RL = 4 RL = 4 , Rg = 10 k, Vr = 1 V[rms], fr = 1 kHz VIN = 20 mV, RL = 4 VIN = 20 mV, RL = 4 , Rg = 10 k Rg = 10 k, RL = 4 VO = 1 W, RL = 4 VIN = 0.3 VDC VIN = 20 mV, RL = 2 VIN = 20 mV, RL = 2 THD = 10%, RL = 2 RL = 4 , Rg = 10 k VSTB = on/off, 50 Hz HPF-on VIN = 10 mV, fIN = 20 kHz Rg = 10 k, RL = Min 38 16 55 60 -300 70 24 38 16 -100 Typ 120 1 0.18 40 0.07 18.5 22.0 60 0 79 0 86 30 40 0.12 25 0 0.10 Max 250 10 0.5 42 0.4 1 300 36 42 0.5 Unit mA A mV[rms] dB % W W dB dB dB mV dB k dB % W Ripple rejection ratio Channel balance Cross-talk *1 Output offset voltage Muting effect *1 Input impedance Voltage gain 2 Total harmonic distortion 2 Maximum output power 2 Shock noise *2 100 mV[p-0] 0.5 % Total harmonic distortion 3 Note) *1 : Measurement using a bandwidth 15 Hz to 30 kHz (12 dB/OCT) filter. *2 : For VSTB = on/off, change over the standby terminal by the voltages of 0 V and 5 V at the time shown below. Standby terminal voltage 5V 0V 500 ms 500 ms 3 AN7199Z s Terminal Equivalent Circuits Pin No. 1 Equivalent circuit ICs for Audio Common Use Description Supply voltage pin Supply connection pin DC Voltage 13.2 V 2 Ch.1 output pin (+) 6.6 V 1 Drive circuit Pre-amp. Ch.1 positive-phase output pin 2 Drive circuit VREF = 6.3 V 3 15 k AN7198Z : 600 AN7199Z : 300 3 GND (output) Grounding pin for ch.1 output 0V 4 1 Drive circuit Pre-amp. Ch.1 output pin (-) Ch.1 inverted-phase output pin 6.6 V 4 Drive circuit VREF = 6.3 V 3 15 k AN7198Z : 600 AN7199Z : 300 5 5 10 k Standby control pin Standby changeover pin Threshold voltage approx. 2.1 V 2 k 6 6 200 Approx. Approx. 15 A 15 A 600 Ch.1 input pin Ch.1 input signal applied pin Input impedance 30 k 0 mV to10 mV 30 k 4 ICs for Audio Common Use s Terminal Equivalent Circuits (continued) Pin No. 7 7 200 Equivalent circuit Description Mute control pin Mute changeover pin Threshold voltage approx. 2.1 V AN7199Z DC Voltage 8 GND (substrate) Being connected with substrate only 0V 9 GND (input) Ground pin for input 0V 10 VREF = 6.3 V Rnf Rnf 15 k 7.8 k 10 Rnf VREF = 6.3 V Rnf 15 k 15 k 2 Beep sound input pin Beep sound signal input pin Input impedance 15.3 k 2.1 V 15 k 15 Rnf AN7198Z : 600 AN7199Z : 300 11 11 200 Approx. Approx. 15 A 15 A 600 Ch. 2 input signal applied pin Input impedance 30 k Ch.2 input pin 0 mV to10 mV 30 k 12 Ripple filter pin 13.0 V VCC 15 k 12 1.7 mA 20 k Output current 3 mA to 10 mA 350 A 5 AN7199Z s Terminal Equivalent Circuits (continued) Pin No. 13 Equivalent circuit ICs for Audio Common Use Description DC Voltage 6.3 V 1 Drive circuit Pre-amp. Ch.2 output pin (-) Ch.2 inverted-phase output pin 13 Drive circuit VREF = 6.3 V 15 15 k AN7198Z : 600 AN7199Z : 300 14 GND(output) Grounding pin for ch.2 output 0V 15 1 Drive circuit Ch.2 output pin (+) Pre-amp. Ch.2 positive-phase output pin 14 Drive circuit 6.3 V VREF = 6.3 V 15 15 k AN7198Z : 600 AN7199Z : 300 s Usage Notes 1. Always attach an outside heat sink to use the chip. In addition, the outside heat sink must be fastened onto a chassis for use. 2. Connect the cooling fin to GND potential. 3. Avoid short-circuit to VCC and short-circuit to GND, and load short-circuit. There is a danger of destruction under a special condition. 4. The temperature protection circuit will be actuated at Tj = approx. 150C, but it is automatically reset when the chip temperature drops below the above set level. 5. The overvoltage protection circuit starts its operation at VCC = approx. 20 V. 6. Take into consideration the heat radiation design particularly when VCC is set high or when the load is 2 . 7. When the beep sound function is not used, open the beep sound input pin (pin 10) or connect it to pin 9 with around 0.01 F capacitor. 8. Connect only pin 9 (ground, signal source) to the signal GND of the amplifier in the previous stage. The characteristics such as distortion, etc. will be improved. 6 ICs for Audio Common Use s Technical Information [1] PD Ta curves of HZIP015-P-0745A PD T a 120 113.6 100 AN7199Z Infinity heat sink Rth (j-c) = 1.1C/W Rth (j-a) = 68.3C/W Power dissipation PD (W) 80 60 59.5 1C/W heat sink 40.3 40 30.5 20.5 20 11.3 1.8 0 0 2C/W heat sink 3C/W heat sink 5C/W heat sink 10C/W heat sink Without heat sink 25 50 75 100 125 150 Ambient temperature Ta (C) [2] Main characteristics PO VCC 45 40 35 30 PC , ICC PO PC (RL = 2 ) 6 5 ICC (RL = 2 ) Consumption power PC (W) 35 Output voltage PO (W) 25 ICC (RL = 4 ) 20 PC (RL = 4 ) 15 10 5 VCC = 13.2 V f = 1 kHz 400 Hz HPF 30 kHz LPF Both ch. input Rg = 10 k 0 5 10 15 2 3 4 30 RL = 2 25 RL = 4 20 15 10 5 0 f = 1 kHz THD = 10% RL = 2 , 4 400 Hz HPF 30 kHz LPF Both ch. input Rg = 10 k 0 5 10 15 20 25 1 0 0 20 Supply voltage VCC (V) Output power (1-ch.) PO (W) Supply current ICC (A) 7 AN7199Z s Technical Information (continued) [2] Main characteristics (continued) PO, THD VIN (RL = 4 ) 100.00 10.00 100.00 ICs for Audio Common Use PO, THD VIN (RL = 2 ) 10.00 THD 10 kHz 10.00 THD 10 kHz PO 1.00 10.00 PO 1.00 THD 100 Hz 1 kHz 1.00 VCC = 13.2 V f = 1 kHz RL = 4 400 Hz HPF 30 kHz LPF Both ch. input Rg = 10 k 10 100 THD 100 Hz 1 kHz 1.00 0.10 VCC = 13.2 V f = 1 kHz RL = 2 400 Hz HPF 30 kHz LPF Both ch. input Rg = 10 k 10 100 0.10 0.10 1 0.01 1 000 0.10 1 0.01 1 000 Input voltage VIN (mV[rms]) Input power VIN (mV[rms]) G V, P O f 40 38 36 GV (2, 4 ) 30 28 26 24 22 20 PO (4 ) 18 16 VCC = 13.2 V 400 Hz HPF PO = 1 W 30 kHz LPF THD = 10% Both ch. input RL = 2 , 4 Rg = 10 k 10 100 1 000 10 000 14 12 0.01 10 100 10.00 THD f 34 32 30 28 26 24 22 20 Output power PO (W) Voltage gain GV (dB) PO (2 ) Total harmonic distortion THD (%) 1.00 RL = 2 0.10 RL = 4 VCC = 13.2 V PO = 1 W RL = 2 , 4 400 Hz HPF 30 kHz LPF Both ch. Input Rg = 10 k 1 000 10 000 100 000 10 100 000 Frequency f (Hz) Frequency f (Hz) GV, THD VCC 45 43 41 GV (RL = 4 , 2 ) 5 4.5 200 180 ICQ, ISTB VCC 10 9 8 7 ICQ 120 100 80 60 40 20 ISTB 0 0 5 10 15 6 5 4 3 RL = 4 Both ch. input 2 Rg = 10 k 1 20 0 25 Quiescent current ICQ (mA) 4 3.5 Total harmonic distortion THD (%) 160 140 39 37 35 33 31 29 27 25 0 5 3 VIN = 40 mV[rms] f = 1 kHz 2.5 RL = 2 , 4 400 Hz HPF 2 30 kHz LPF Both ch. input 1.5 Rg = 10 k 1 THD (RL = 4 , 2 ) 10 15 20 0.5 0 25 Supply voltage VCC (V) Supply voltage VCC (V) 8 Standby current ISTB (A) Voltage gain GV (dB) Total harmonic distortion THD (%) Total harmonic distortion THD (%) Output power PO (W) Output power PO (W) ICs for Audio Common Use s Technical Information (continued) [2] Main characteristics (continued) VNO VCC 1.0 1.0 RL = 4 Rg = 10 k AN7199Z VNO Rg VCC = 13.2 V RL = 4 Rg = 10 k Output noise voltage VNO (V[rms]) Flat Output noise voltage VNO (V[rms]) Flat 0.5 0.5 DIN Audio Filter DIN Audio Filter 0.0 0 5 10 15 20 0.0 10 100 1 000 10 000 100 000 Supply voltage VCC (V) Input impedance Rg () RR VCC 90 70 RR Vr ch.2 80 60 Ripple rejection ratio RR (dB) 70 ch.2 60 50 40 30 20 RL = 4 400 Hz HPF 30 kHz LPF Rg = 10 k fr = 1 kHz Vr = 1 V[rms] 0 5 10 15 20 25 ch.1 Ripple rejection ratio RR (dB) ch.1 50 40 30 20 10 0 VCC = 13.2 V RL = 4 400 Hz HPF 30 kHz LPF Rg = 10 k fr = 1 kHz 1 10 100 1 000 10 000 Supply voltage VCC (V) Power supply ripple voltage Vr (mV[rms]) RR fr 70 ch.1 79 60 ch.2 78 80 CT VCC PO = 1 W f = 1 kHz RL = 4 400 Hz HPF 30 kHz LPF Rg = 10 k Ripple rejection ratio RR (dB) Cross-talk CT (dB) 50 40 30 20 10 0 10 77 76 75 74 ch.2 73 ch.1 72 71 70 0 5 10 15 VCC = 13.2 V RL = 4 Rg = 10 k fr = 1 kHz Vr = 1 V[rms] 100 1 000 10 000 20 25 Power supply ripple frequency fr (Hz) Supply voltage VCC (V) 9 AN7199Z s Technical Information (continued) [2] Main characteristics (continued) CT VIN 80 ch.2 70 60 80 70 90 ICs for Audio Common Use CT f ch.1 ch.2 Cross-talk CT (dB) Cross-talk CT (dB) ch.1 50 40 30 20 10 0 1 10 100 1 000 VCC = 13.2 V f = 1 kHz RL = 4 400 Hz HPF 30 kHz LPF Rg = 10 k 60 50 40 30 20 10 0 10 100 1 000 VCC = 13.2 V VIN = 40 mV[rms] RL = 4 Rg = 10 k 10 000 100 000 Input voltage VIN (mV[rms]) Frequency f (Hz) MT VCC 110 100 90 100 90 80 MT VIN Muting effect MT (dB) 80 70 60 50 40 30 20 10 0 5 10 15 PO = 1 W f = 1 kHz RL = 4 400 Hz HPF 30 kHz LPF Rg = 10 k 20 25 Muting effect MT (dB) 70 60 50 40 30 20 VCC = 13.2 V f = 1 kHz RL = 4 400 Hz HPF 10 30 kHz LPF Rg = 10 k 0 0 10 100 1 000 10 000 Supply voltage VCC (V) Input voltage VIN (mV[rms]) MT f 110 100 90 MT VMUTE 90 80 70 Muting effect MT (dB) Muting effect MT (dB) 80 70 60 50 40 30 20 10 10 100 1 000 VCC = 13.2 V VIN = 40 mV[rms] RL = 4 Rg = 10 k 10 000 100 000 ch.1 60 50 40 30 20 10 0 0.0 1.0 2.0 ch.2 VCC = 13.2 V PO = 1 W f = 1 kHz RL = 4 400 Hz HPF 30 kHz LPF Rg = 10 k 3.0 4.0 5.0 Frequency f (Hz) Mute voltage VMUTE (V) 10 ICs for Audio Common Use s Technical Information (continued) [2] Main characteristics (continued) ICQ VSTB 200 180 250 200 ch.2 150 ch.1 100 50 0 -50 -100 -150 -200 -250 0 5 10 15 ch.2 mute on ch.1 mute on AN7199Z Voffset VCC Quiescent circuit current ICQ (mA) 160 140 120 100 80 60 40 20 0 0.0 1.0 2.0 3.0 VCC = 13.2 V RL = 4 Rg = 10 k 4.0 5.0 Output offset voltage Voffset (mV) RL = 4 Rg = 10 k 20 Standby voltage VSTB (V) Supply voltage VCC (V) [3] Application note 1. Standby function 1) The power can be turned on or off by making pin 5 (standby terminal) high or low. 2) The standby terminal has threshold voltage of approx. 2.1 V, however, it has temperature dependency of approx. - 6 mV/C. The recommended Terminal state Open Low Table 1 Terminal voltage 0V 0 V to 1.0 V Power Standby state Standby state High Higher than 3 V Operating state range of use is shown in table 1. 3) The internal circuit of standby terminal is as shown in figure 1. When the standby terminal is high, the current approximately expressed by the following equation will flow into the circuit. VSTB-2.7 V [mA] 10 k 5V VSTB 0V 5 10 k RF Protection circuit Constant current source ISTB = Sub 2 k 4 k Figure 1 4) A power supply with no ripple component should be used for the control voltage of standby terminal . 11 AN7199Z s Technical Information (continued) [2] Application note (continued) ICs for Audio Common Use 2. Oscillation countermeasures 1) In order to increase the oscillation allowance, it is unnecessary to use a capacitor and a resistor between each output terminal and GND. However, when inserting the capacitor for counter-measures against output line noise between the output terminal and GND, insert a resistor of approx. 2.2 in series as shown in figure 2. The oscillation may occur if only capacitor is used. Use it after giving a sufficient evaluation 2) The use of polyester film capacitor having a little fluctuation with temperature and frequency is recommended as the capacitor for countermeasures against output line noise. 1 2,4 13,15 To speaker 0.01 F to 0.1 F 2.2 3,14 Figure 2 3. Input terminal 1) The reference voltage of input terminal is 0 V. When the input signal has a reference voltage other than 0 V potential, connect a coupling capacitor (of about several F) for DC component cut in series with the input terminal. Check the low-pass frequency characteristics to determine the capacitor value. 2) 10 k or less of signal source impedance Rg can reduce the output end noise voltage. 3) The output offset voltage fluctuates when the signal source impedance Rg is changed. A care must be taken when using the circuit by directly connecting the volume to the input terminal. In such a case, the use of coupling capacitor is recommended. 4) If a high frequency signal from tuners enters the input terminal as noise, insert a capacitor of approx. 0.01 F between the input terminal and input GND. When a high frequency signal is inputted, malfunction in protective circuits may occur. 15 A 15 A 1 F Input signal 0.01 F 6 11 10 k 200 30 k 600 Attenuator To power 4. Ripple filter Figure 3 1) In order to suppress the fluctuation of supply voltage, connect a capacitor of approx. 33 F between RF terminal (pin12) and STB-on/off time (ms) re jec 1 000 Ri pp le 60 The larger the capacitance of the ripple filter is, the better the ripple rejection becomes. 3) Relation between the rise time of circuit and a capacitor The larger the capacitance of the ripple filter is, the longer the time from the power on (standby high) to the sound release becomes. 4) The DC voltage of output terminal is approximately the middle point of the ripple filter terminal voltage. 5) The internal circuit of ripple filter terminal is as shown in figure 5 and the charge current is approx. 3 mA to 10 mA. 12 100 B ST f ti -of -on me e 50 tim STB 10 40 1.0 10 100 RF capacitor value (F) Figure 4 Ripple rejection ratio (dB) GND. 2) Relation between RR (Ripple Rejection Ratio) and a capacitor tio n ICs for Audio Common Use s Technical Information (continued) [2] Application note (continued) 4. Ripple filter (continued) 6) After the power supply is turned off (STB-low), it takes less than 10 seconds for the total circuit current to become the standby current (under 10 A). If approx. 47 ohms resistor is inserted between the ripple filter terminal and GND for the purpose of reducing the inspection time with set, a time until the current becomes the standby current can be shortened. Figure 5 5. GND terminal 1) Be sure to short-circuit each GND terminal of pin 3, 8, 9 and 14 at the outside of the IC in use. 2) For each GND terminal, the one-point earth, referenced to the GND connection point of electrolytic capacitor between the supply terminal and GND, is most effective for reducing the distortion. Even in the worst case, ground pin 8, 9 of input GND separately from Figure 6 AN7198Z, AN7199Z AN7199Z VCC 15 k 12 33 F 350 A 10 k 10 k 1.7 mA VREF Constant current source Protection circuit 4 k 1 3 8 9 14 To GND of input all the other GND terminals. 3) Each GND terminal is not electrically short-circuited inside. Only pin 8 is connected with substrate. 4) Pin 9 is input signal GND. Connect only pin 9 with Pre-GND. 6. Cooling fin 1) The cooling fin is not connected with GND terminal by using Au wire. Only pin 8 is electrically connected through substrate. 2) Always attach an outside heat sink to the cooling fin. The cooling fin must be fastened onto a chassis for use. Otherwise, IC lead failure may occur. 3) Do not give the cooling fin any potential other than the GND potential. Otherwise, it may cause breakdown. 4) Connection of the cooling fin with GND can reduce the incoming noise hum. (It is unnecessary to connect with GND in use, but connect with the power GND when the cooling fin is connected with GND) 7. Shock noise 1) STB on/off No shock noise is released. However, the changeover switch of the standby terminal may make a slight shock noise. In such a case, insert a capacitor of approx. 0.01 F between the standby terminal and GND. 2) Mute on/off No shock noise is released. Refer to the section on the mute function. 13 AN7199Z s Technical Information (continued) [2] Application note (continued) ICs for Audio Common Use 8. Mute Function 1) The mute-on/off is possible by making pin 7 (the muting terminal) high or low. 2) The muting circuit is as shown in figure 7. The amplifier gain including attenuator block is given in the following equation : I1 x 50 GV = I2 Original gain From the above equation, the amplifier gain can be made as 0 time by setting I1 at 0 mA at muting. 3) The threshold voltage of VMUTE is as follows : Mute-off : approx. 1 V or less Mute-on : approx. 3 V or more Mute/on 5V VMUTE 0V Mute/off 1 F 22 k 4) Attack time and recovery time can be changed by the external CR of pin 7. For recommended circuits (In figure 7 22 k, 1 F), the above mentioned times are as follows : Attack time : Approx. 30 ms Recovery time : Approx. 40 ms However, the control voltage of VMUTE is assumed to be 5 V. When it is not directly controlled by microcomputer (5 V), (that is, 13.2 V separate power supply), it is necessary to change CR values because the above times change. 5) When the attack time and recovery time are set at 20 ms or less, pay attention to the IC with larger output offset because it may release the shock noise. 9. Voltage gain The voltage gain is fixed at 34 dB for the AN7198Z, and 40 dB for the AN7199Z. It is not possible to change those values by the addition of an external resistor. I1 I2 Input 7 200 Attenuator block I1 I2 Output stage Output stage I1 = approx.120 A I2 = approx.120 A Figure 7 14 ICs for Audio Common Use s Technical Information (continued) [2] Application note (continued) AN7199Z 10. Beep sound input function 1) The application circuit using the beep sound input is shown in figure 8. Connect the beep signals from the microcomputer to pin 10 via the capacitor C1 for DC cut and the resistor R1 for voltage gain adjustment. 2) The voltage gain of beep sound terminal is approx. -6.2 dB. In the setting value of figure 8, it becomes approx. -19.7 dB (f = 1 kHz). 3) The beep sound is outputted to the output, terminals pin 2 and pin 15. Rnf AN7198Z AN7199Z 600 300 GVA 28 dB 34 dB VREF = 6.3 V C1 47 k 10 7.8 k Rnf GVA 2 15 k 15 k 15 GVA Rnf Beep input GVBEEP = Rnf 2 15 k+Rnf 1/jC1+R1+7.8 + 2 0.022 F R1 x GVA VREF = 6.3 V Figure 8 11. Two IC use Figure 9 shows the application circuit example when two ICs are used : Power supply 10 k 2 200 F 11 13 15 1 3 5 7 9 Out(RR) Standby 10 k 10 12 Mute 2.2 F 14 2 4 6 8 Out(FR) 22 F to 47 F 10 k In(RR) In(FR) In(RL) 11 13 In(FL) S-GND 10 12 0.022 F Beep 47 k 14 2 4 6 8 Out(FL) 15 1 3 5 7 9 Out(RL) 10 k 10 k Figure 9 15 AN7199Z s Technical Information (continued) [2] Application note (continued) ICs for Audio Common Use 11. Two IC use (continued) 1) Supply terminal Short-circuiting each other, insert an electrolytic capacitor of approx. 2 200 F into the supply terminals. However, if sufficient characteristics of the ripple rejection can not be obtained, use an even larger capacitor or insert a 2 200 F capacitor into each IC. The best sound quality can be obtained by inserting a 2 200 F capacitor near the terminal of each IC. 2) Standby terminal (pin 5) Even if the standby terminals are connected with each other, that does not result in an abnormal operation. Connect with the microcomputer after connecting the standby pins with each other. At that time, the current flowing into the standby terminal is twice as large as the current which is described in 1. Standby function. 3) Muting terminal (pin 7) An abnormal operation does not occur even if the muting terminals are short-circuited with each other. The muting time constant changes when two ICs connection is made. If the CR constants are set at twice and 1/2 time respectively, the time constant value becomes as same as the value when one IC is used. In terms of safety design, taking advantage of the fact that a large current is difficult to flow when the mute is being applied so that it is difficult to cause the destruction, it is designed so that the mute terminal will become High when an abnormality such as the short-circuit to VCC or short-circuit to GND takes place. (To avoid the influence of IC in an abnormal state when using two ICs). Do not connect a microcomputer directly to the mute terminal because the mute terminal voltage rises to approx. 12 V at that time. 4) Beep sound input terminal (pin 10) Even if the the beep sound input terminals are short-circuited each other, that does not result in an abnormal operation. However, if there is a temperature difference between ICs, there may be a fluctuation of the output offset. In order to avoid such a phenomenon, connect the ICs with each other through a resistor (47 k). 5) Ripple filter terminal (pin 12) Even if the ripple filter terminals are short-circuited each other, that does not result in an abnormal operation. However, if the standby of each IC is individually controlled, the short-circuiting is not allowed. Use the circuit after connecting a capacitor (33 F) to each IC. 12. Precautions on misuse 1) Erroneous connection in the case of short-circuit to VCC and short-circuit to GND or load short-circuit The AN7198Z, AN7199Z have the breakdown voltage of 20 V or higher when an short-circuit to VCC and short-circuit to GND or load short-circuit occur. However, there is a possibility of destruction, then smoke emission and ignition under a special condition. Avoid misuse and erroneous connection of the circuit. 2) Power supply surge The power supply surge breakdown voltage is evaluated by the test circuit shown in figure 10 and the surge waveform as shown in figure 11 is evaluated. The withstanding capability against power supply surge is 80 V for the AN7198Z, AN7199Z. VP 1 (allowance: 1%) 20 W 10000 F/100 V 10 (allowance: 1%) 40 W 0.63 VP 0.37 VP D.U.T 0V 1 ms 6 ms 100 ms Figure 11. Surge waveform Surge voltage Figure 10. Power supply surge test circuit 16 ICs for Audio Common Use s Technical Information (continued) [2] Application note (continued) AN7199Z 12. Precautions on misuse (continued) 3) Destruction mode for the AN7198Z, AN7199Z The AN7198Z, AN7199Z are the power ICs with high breakdown withstanding voltage but it has been found that the destruction occurs under special conditions. (1) GND-open short-circuit to GND Short-circuit of the output terminal to the GND terminal of power supply when GND terminal of the IC is open, or short-circuit to GND when the GND terminal of the IC is over 0.7 V higher than the shortcircuited output terminal. At that time, if VCC = more than 16 V and a voltage is also applied to STB terminal, then the destruction occurs. (2) Short-circuit to VCC of the plus and minus side output terminals at the same time If short-circuit to VCC fault occurs on both the plus and minus side output terminals at the same time with a short-circuit resistor which does not actuate the protection circuit. The power GND terminal current may exceed 10 A and the wire melts down since the current capacity of Au wire is exceeded. (3) VCC - GND reverse connection Parasitic device is created everywhere and the circuit destruction takes place. s Application Circuit Example 12 Ripple filter Ch.1 GND 3 1 VCC 14 Ch.2 GND Ch.1 Out (-) 4 13 Ch.2 Out (-) Ch.1 Out (+) 2 Beep In 10 Standby 5 Ch.2 In 11 8 6 7 9 GND(input) 15 Ch.2 Out (+) GND(sub) Ch.1 In Mute 17 |
Price & Availability of AN7199Z
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |