AN7195K PANASONIC
Document overview
- Manufacturer or author: Provided By digicamel.com
- PDF pages: 12
Technical content
Dual 15 W BTL power IC for car audio n Overview The AN7195K is an audio power IC developed for the sound output of car audio (dual 15 W). It is incorporating various protection circuits to pro- tect the IC from destruction by GND-open short-circuit to GND and power supply surge which are the most im- portant subjects of power IC protection, and the IC will largely contribute to a high reliability design of equip- ment. It is also incorporating the industry's first excellent 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, the AN7195K is pin compatible with the AN7190NK (dual 20 W), so that the identical pattern design is allowed for high-class types as well as popular types. n Features
- Built-in various protection circuits (realizing high break- down voltage against destruction ) Power supply surge breakdown voltage of 100 V or more Ground -open breakdown voltage of 14 V or more
- Built-in standby function (free from shock noise at standby 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 (parts reduction to half compared with the AN7176K) It eliminates the need for NF and BS electrolytic ca- pacitors, Muting function is unnecessary Power supply choke coil is unnecessary
- Provided with beep sound input pin
- High sound quality design
- Pin compatible with the AN7190NK (dual 20 W) n Applications
- Car audio HZIP016-P-0665A 11.3±0.3 7.7±0.3 (10.0) 29.6±0.3 (10.0) 20.0±0.3 28.0±0.3 29.75±0.3 (0.6) 0.6(0.889) (1.1) (0.889) 161 +0.15 -0.10 f3.6 R1.8 3.5±0.2 1.788 1.45±0.151.80±0.15 (2.54) 1.2+0.1 0.25+0.10 -0.05 (12.5) (14.1) (18.7) (1.2) (21.5) (17.63) R0.7 Unit : mm
AN7195K ICs for Audio Common Use Ref. Protection Cct. Att.Con. Att. Att. Att. Att.
1 V CC8GND(sub)
GND(input) Beep In Ch.1 In Ch.2 In Ripple filter Standby Mute N.C. 16 Ch.1 GND Ch.2 GND Ch.1 Out (-) Ch.1 Out (+) Ch.2 Out (-) Ch.2 Out (+) n Pin Descriptions n Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage *2 V CC 25 V Peak supply voltage *3 V surge 80 V Supply current I CC 9.0 A Power dissipation *4 PD 32.5 W Operating ambient temperature *1 Topr -30 to +85 °C Storage temperature *1 Tstg -55 to +150 °C Note) *1 : All items are at Ta = 25°C, except for the operating ambient temperature and storage temperature. *2 : Without signal *3 : Time = 0.2 s *4: T a = 85°C Pin No. Description
1 Power supply
2 Ch.1 output ( +) 3 Grounding (output ch.1) 4 Ch.1 output ( -)
5 Standby
6 Ch.1 input
7 Muting
8 Grounding (sub)
Pin No. Description
9 Grounding (input)
10 Beep sound input
11 Ch.2 input
12 Ripple filter
13 Ch.2 output ( -) 14 Grounding (output ch.2) 15 Ch.2 output ( +) 16 N.C. n Block Diagram
ICs for Audio Common Use AN7195K Parameter Symbol Conditions Min Typ Max Unit Quiescent current I CQ V IN = 0 mV, RL = 4 W¾ 120 250 mA Standby current I STB V IN = 0 mV, RL = 4 W¾ 11 0 mA Output noise voltage *1 V NO R g = 4.7 kW , RL = 4 W¾ 0.22 0.5 mV[rms] Voltage gain 1 G V1 V IN = 20 mV, RL = 4 W 38 40 42 dB Total harmonic distortion 1 THD 1 V IN = 20 mV, RL = 4 W¾ 0.07 0.4 % Maximum output power 1 P O1 THD = 10% , RL = 4 W 12 14 ¾ W Ripple rejection ratio *1 RR R L = 4 W , Rg = 4.7 kW ,6 0 7 0 ¾ dB V r = 1 V[rms], fr = 1 kHz Channel balance CB V IN = 20 mV, RL = 4 W¾ 01 d B Cross-talk *1 CT V IN = 20 mV, RL = 4 W ,5 5 6 5 ¾ dB R g = 4.7 kW Output offset voltage V Off R g = 4.7 kW , RL = 4 W- 300 0 300 mV Muting effect *1 MT V IN = 20 mV, RL = 4 W 70 82 ¾ dB Input impedance Z i V IN = – 0.3 VDC 22 30 35 k W Voltage gain 2 G V2 V IN = 20 mV, RL = 2 W 38 40 42 dB Total harmonic distortion 2 THD 2 V IN = 20 mV, RL = 2 W¾ 0.1 0.5 % Maximum output power 2 P O2 THD = 10% , RL = 2 W 12 20 ¾ W Shock noise *2 V S R L = 4 W , Rg = 4.7 kW- 100 0 100 mV[p-0] V STB = on/off, 50 Hz HPF-on Total harmonic distortion 3 THD 3 V IN = 10 mV, fIN = 20 kHz ¾ 0.10 0.5 % R g = 4.7 kW , RL = ¥ n Electrical Characteristics at VCC = 13.2 V, f = 1 kHz, Ta = 25°C 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 n Recommended Operating Range Parameter Symbol Range Unit Supply voltage V CC 8.0 to 18.0 V 5 V 0 V 500 ms 500 ms
AN7195K ICs for Audio Common Use Pin No. Equivalent circuit Description DC Voltage 1 ¾ Supply voltage pin 13.2 V Supply connection pin 2 Ch.1 output pin ( +) 6.6 V Ch.1 positive-phase output pin 3 ¾ GND (output) 0 V Grounding pin for ch.1 output 4 Ch.1 output pin ( -) 6.6 V Ch.1 inverted-phase output pin ɹ
5 Standby control pin ¾
Threshold voltage approx. 2.1 V 6 Ch.1 input pin 0 mV to10 mV Ch.1 input signal applied pin Input impedance 30 kW 15 kW 300 W Pre-amp. V REF = 6.6 V Drive circuit Drive circuit n Terminal Equivalent Circuits Drive circuit Drive circuit 15 kW 300 W Pre-amp. V REF = 6.6 V 900 W 10 kW Approx. 15 mA Approx. 15 mA 200 W 30 kW 400 W
ICs for Audio Common Use AN7195K n Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit Description DC Voltage
7 Mute control pin ¾
Threshold voltage approx. 2.0 V 8 ¾ GND (substrate) 0 V Being connected with substrate only 9 ¾ GND (input) 0 V Ground pin for input 10 Beep sound input pin 2.1 V Beep sound signal input pin Input impedance 25 kW 11 Ch.2 input pin 0 mV to10 mV Ch. 2 input signal applied pin Input impedance 30 kW 12 Ripple filter pin 13.0 V Output current 3 mA to 10 mA 5 kW 300 W 25 kW
300 W 15 kW
V REF = 2.1 V V REF = 2.1 V Approx. 15 mA Approx. 15 mA 200 W 30 kW 400 W 20 kW 30 kW 200 mA V CC Quick discharge circuit
AN7195K ICs for Audio Common Use Pin No. Equivalent circuit Description DC Voltage 13 Ch.2 output pin ( -) 6.6 V Ch.2 inverted-phase output pin 14 ¾ GND(output) 0 V Grounding pin for ch.2 output 15 Ch.2 Output pin ( +) 6.6 V Ch.2 positive-phase output pin 16 ¾ N.C. ¾ Non-connection n Terminal Equivalent Circuits (continued) Drive circuit Drive circuit 15 kW 300 W Pre-amp. V REF = 6.6 V Drive circuit Drive circuit 15 kW 300 W Pre-amp. V REF = 6.6 V n 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. 4. The temperature protection circuit will be actuated at Tj = approx. 150°C, 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 W . 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 mF capacitor.
ICs for Audio Common Use AN7195K n Technical Information [1] PD ¾ Ta curves of HZIP016-P-0665A PD ¾ Ta 62.5 10.4 17.9 41.7 31.3 3.0 0 25 50 75 100 125 150 Infinity heat sink 1°C/W heat sink 2°C/W heat sink 3°C/W heat sink 5°C/W heat sink 10°C/W heat sink Without heat sink R th (j-c) = 2°C/W R th (j-a) = 42°C/W Ambient temperature Ta (°C) Power dissipation PD (W) [2] 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 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. ISTB = V STB -2.7 V [mA]10 kW Figure 1 4) A power supply with no ripple component should be used for the control voltage of standby terminal . 3.5 kW 3.5 kW 3.5 kW 3.5 kW 10 kW5 V 0 V 5 RF Sub V STB Constant current source Protection circuit Terminal state Terminal voltage Power Open 0 V Standby state Low 0 V to 1.0 V Standby state High Higher than 3 V Operating state Table 1
AN7195K ICs for Audio Common Use Beep In GND(sub) GND(input) N.C. Ch.1 In Ch.2 In Ripple filter Standby Mute Ch.1 GND Ch.2 GND Ch.1 Out (-) Ch.1 Out (+) Ch.2 Out (-) Ch.2 Out (+) V CC n Technical Information (continued) [2] Application note (continued) 11. Two IC use (continued) 1) Supply terminal Short-circuiting each other, insert an electrolytic capacitor of approx. 2 200 mF 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 mF capacitor into each IC. The best sound quality can be obtained by inserting a 2 200 mF 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. 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 kW ). 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 mF) to each IC. 6) If one IC is used as a combination of L or R of the front and the rear, the cross-talk between the L and R increases. The circuit shown by figure 8 becomes thermally advantageous when there is a difference in the output between the front and rear. 7) Arrangement of IC The larger the distance between the two ICs is, the more advantageous the heat radiation design becomes. n Application Circuit Example