UNISONIC TECHNOLOGIES CO., LTD W BRIDGE AMPLIFIER FOR CAR RADIO DESCRIPTION The UTC PA05 is class B dual audio power amplifier, have designed for car radio application. FEATURES * High output power: P OUT =10+10W@R L =Ω, THD=10% P OUT =W@R L =4Ω, THD=1% ORDERING INFORMATION Ordering Number Lead Free Halogen Free Package Packing PA05L-J11-A-T PA05G-J11-A-T HZIP-11A Tube PA05L-H14-B-T PA05G-H14-B-T HSIP-14B Tube 1 of 1 Copyright 10 Unisonic Technologies Co., Ltd
PIN CONFIGURATION HZIP-11A HSIP-14B PIN DESCRIPTION PIN NO. HZIP-11 HSIP-14* PIN NAME 1 1 INPUT+ (1) INPUT- (1) 3 3 SVRR 4 4 INPUT- () 5 5 INPUT+ () GND 7 10 BOOTSTRAP 8 11 OUTPUT 9 1 +V S 10 13 OUTPUT 1 11 14 BOOTSTRAP 1 * PIN 7, 8, 9 no connection. UNISONIC TECHNOLOGIES CO., LTD of 1
BLOCK DIAGRAM 11 10mΩ 10 S.O.A PROICCTION OUTPUT INMIDIT FOR DC/AC SNORT CRCUIT 1 R1 3 Vref THERMAL SHUT DOWN OUMP 5 4 S.O.A PROICCTION R1 OUTPUT INMIDIT FOR DC/AC SNORT CRCUIT 7 9 10mΩ 8 UNISONIC TECHNOLOGIES CO., LTD 3 of 1
ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Operating Supply Voltage Vss 18 V DC Supply Voltage Vss 8 V Peak Supply Voltage (for 50ms) Vss 40 V Output Peak Current (Note) non repetitive t=0.1ms Io 4.5 A repetitive f 10Hz Io 3.5 A Power Dissipation at Tc=0 C P D 30 W Junction Temperature T J +150 C Storage Temperature T STG -40 ~ 150 C Note: The max. output current is internally limited. THERMAL DATA PARAMETER SYMBOL RATINGS UNIT Junction to Case θ JC 3.0 C /W ELECTRICAL CHARACTERISTICS (Refer to the application circuit, Ta=5 C, Gv=50dB, Rth(heatsink)=4 /W, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT BRIDGE Supply Voltage Vss 8 18 V Output Offset Voltage (between pin 8 and pin 10) Total Quiescent Drain Current Output Power Total Harmonic Distortion f=1khz Input Sensitivity f=1khz Vos I D P OUT THD V IN Vss=14.4V Vss=13.V Vss=14.4V, R L =4Ω Vss=13.V, R L =3.Ω THD=10%, f=1hz Vss=14.4V, R L =4Ω R L =3.Ω Vss=13.V, R L =3.Ω Vss=14.4V, R L =4Ω P OUT =50mW ~ 15W Vss=13.V, R L =3.Ω P OUT =50mW ~ 13W 18 17 75 70 19 150 150 150 10 mv mv ma ma W 1 % 1 % P OUT =W, R L =4Ω 9 mv P OUT =W, R L =3.Ω 8 mv Input Resistance R IN f=1khz 70 kω Low Frequency Roll Off (-3dB) f L R L =3.Ω 40 Hz High Frequency Roll Off (-3dB) f H R L =3.Ω khz Closed Loop Voltage Gain G V f=1khz 50 db Total Input Noise Voltage en R G =10kΩ(Note 1) 3 10 μv Supply Voltage Rejection SVR R G =10kΩ, C4=10μF F RIPPLE =100Hz, V RIPPLE =0.5V 45 55 db Efficiency Thermal Shut-down Junction Temperature Output Voltage With One Side of the Speaker Shorted to Ground η T J V OSH Vss=14.4V, f=1khz P OUT =W, R L =4Ω P OUT =W, R L =3.Ω Vss=13.V, f=1khz P OUT =19W, R L =3.Ω Vss=14.4V, R L =4Ω f=1khz, P D =13W 0 0 % 58 % 145 C Vss=14.4V, R L =4Ω Vss=13.V, R L =3.Ω V UNISONIC TECHNOLOGIES CO., LTD 4 of 1
ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT STEREO Supply Voltage Vss 8 18 V Quiescent Output Voltage Total Quiescent Drain Current Output Power (each channel) f=1hz, THD=10% Total Harmonic Distortion (each channel) f=1khz Cross Talk V OUT I D P OUT THD C T Vss=14.4V Vss=13.V Vss=14.4V Vss=13.V Vss=14.4V. 7.. 5 R L =4Ω.5 R L =3.Ω 7 8 7.8 7. 1 1 V V ma ma R L =Ω 9 10 R L =1.Ω 10 11 W Vss=13.V R L =3.Ω.5 R L =1.Ω 9 10 Vss=1V, R L =Ω 1 Vss=14.4V, R L =4Ω P OUT =50mW ~ 4W 0. 1 % Vss=14.4V, R L =Ω P OUT =50mW ~ W 0.3 1 % Vss=13.V, R L =3.Ω P OUT =50mW ~ 3W 0. 1 % Vss=13.V, R L =1.Ω P OUT =40mW ~ W 0.3 1 % Vss=14.4V, V OUT =4VRMS f=1khz 0 R L =4Ω, R G =5KΩ f=10khz 45 db Input Saturation Voltage V IN 300 mv Input Sensitivity V IN f=1khz, P OUT =1W R L =4Ω R L =3.Ω Input Resistance R IN f=1khz 70 0 kω Low Frequency Roll Off (-3dB) f L R L =Ω 50 Hz High Frequency Roll Off (-3dB) f H R L =Ω 15 khz Voltage Gain (open Ioop) G V f=1khz 90 db Voltage Gain (close Ioop) G V f=1khz 48 50 51 db Closed Loop Gain Matching G V 0.5 db Total Input Noise Voltage En R G =10kΩ (Note 1) 1.5 5 μv Supply Voltage Rejection SVR R G =10kΩ, C3=10μF F RIPPLE =100Hz, V RIPPLE =0.5V 35 45 db Efficiency Note: 1. Bandwith Filter: Hz ~ khz η Vss=14.4V, f=1khz P OUT =.5W, R L =4Ω P OUT =10W, R L =Ω Vss=13.V, f=1khz P OUT =.5W, R L =3.Ω P OUT =10W, R L =1.Ω 5.5 70 0 70 0 mv % % % % UNISONIC TECHNOLOGIES CO., LTD 5 of 1
TEST AND APPLICATION CIRCUIT Bridge amplifier +Vs R1 1KΩ C3 0.1µF 9 3 C4 10µF INPUT C1.µF/ 3V 1 + 1/ PA05 - C5 100µF/ 10V 11 10 C µf/ 3V R 1KΩ C9 0.1µF C.µF/ 3V 5 + 1/ PA05 - C7 100µF/ 10V 7 8 R3 KΩ R4 1Ω 4 C8 µf/ 3V R5 1Ω R 1Ω C10 0.1µF R7 1Ω RL Stereo amplifier +Vs R1 0.1µF 1KΩ INPUT (L) C1.µF 5 9 + 1/ PA05-3 7 8 C4 100µF C5 µf C4 10µF R 1.KΩ C10 0µF C8 0.1µF INPUT (R) C.µF 1 + 1/ PA05-4 C 100µF 11 10 C7 µf R3 3.3Ω R4 1.KΩ R 1Ω C11 0µF C9 0.1µF RL RL R5 3.3Ω R7 1Ω UNISONIC TECHNOLOGIES CO., LTD of 1
BRIDGE AMPLIFIER DESIGN The following consideraions can be useful when designing a bridge amplifier. PARAMETER SINGLE ENDED BRIDGE 1 V OUT max Peak Output Voltage (before clipping) (Vs-VCE sat) Vs-VCE sat I OUT max Peak Output Current (before clipping) 1 Vs-VCE sat RL Vs-VCE sat RL P OUT max RMS Output Power (before clipping) 1 (Vs-VCE sat) (Vs-VCE sat) 4 RL RL Where: V CE sat=output transistors saturation voltage Vs=allowable supply voltage R L =load impedance Voltage and current swings are twice for a bridge amplifier in comparison with single ended amplifier. In order words, with the same R L the bridge configuration can deliver an output power that is four times the output power of a single ended amplifier, while, with the same max output current the bridge configuration can deliver an output power that is twice the output power of a single ended amplifier. Core must be taken when selecting Vs and R L in order to avoid an output peak current above the absolute maximum rating. From the expression for Io max, assuming Vs=14.4V and V CE sat=v, the minimum load that can be driven by UTC PA05 in bridge configuration is: The voltage gain of the bridge configuration is given by (see Figure 3): Gv= V0 V1 =1+ R1 R R4 R + R4 + R3 R4 For sufficiently high gains (40 ~ 50dB) it is possible to put R=R4 and R3=R1, simplifing the formula in: Gv=4 R1 R Gv (db) R1(Ω) R=R4(Ω) R3(Ω) 40 1000 39 00 50 1000 1 00 Bridge Configuration VD Vi + + - - RL R1 R3 R4 R UNISONIC TECHNOLOGIES CO., LTD 7 of 1
APPLICATION INFORMATION Bridge Amplifier without Boostrap Low Cost Bridge Amplifier (Gv=4dB) UNISONIC TECHNOLOGIES CO., LTD 8 of 1
APPLICATION INFORMATION(Cont.) 10+10W Stereo Amplifier with Tone Balance and Loudness Control Vs=+14.4V R1 0.1μF 1KΩ INPUT(L) 5.KΩ 9 3 10μF 47nF P1 100KΩ INPUT(R) 5.KΩ 47nF P 100KΩ 47KΩ.nF P3 100KΩ.7KΩ 0.15μF 47KΩ.nF P4 100KΩ.7KΩ P5 0.μF.nF 100KΩ 0.μF.nF + 1/ PA05 - + 1/ PA05-100μF 7 8 C5 100μF 4 100μF 11 10 C 100μF R3 1KΩ R4 3.3Ω R5 1KΩ R 3.3Ω C9 0μF C7 0.1μF R7 1Ω 0μF C8 0.1μF R8 1Ω 4Ω 4Ω 4Ω 4Ω 0.15μF Tone Control Response (circuit of Fihure 8) 1 9 db 3 0 MID TREBLE -3 - BASS -9-1 10 10 10 3 10 4 f (Hz) 10 5 UNISONIC TECHNOLOGIES CO., LTD 9 of 1
APPLICATION INFORMATION(Cont.) W Bus Amplifier Simple W Two Way Amplifier (Fc=kHz) UNISONIC TECHNOLOGIES CO., LTD 10 of 1
APPLICATION INFORMATION(Cont.) Bridge Amplifier Circuit suited for Low-gain Applications (Gv=34dB) Figure 1. Example of Muting Circuit + 1/ - + 1/ - 1KΩ 1KΩ MUTE SWITCH +Vs UNISONIC TECHNOLOGIES CO., LTD 11 of 1
BUILT-IN PROTECTION SYSTEMS LOAD DUMP VOLTAGE SURGE The UTC PA05 has a circuit which enables it to withstand a voltage pulse train, on pin9, of the type shown in Figure 3. If the supply voltage peaks to more than 40V, then an LC filter must be inserted between the supply and pin9, in order to assure that the pulses at pin 9 will be held withing the limits shown. A suggested LC network is shown in Figure, With this network, a train of pulses with amplitude up to 1V and width of ms can be applied at point A, This type of protection is ON when the supply voltage (pulse or DC) exceeds 18V. For this reason the maximum operating supply voltage is 18V. Figure Vs(V) 40 Figure 3 FROM SUPPLY LINE A L=mH C 3000μ F 1V TO PIN 9 14.4 t1 t t1=50ms t=1000ms t SHORT CIRCUIT (AC AND DC CONDITIONS) The UTC PA05 can withstand a permanent short circuit on the output for a supply voltage up to 1V. POLARITY INVERSION High current (up to 10A) can be handled by the device with no damage for a longer period than the blow-out time of a quick A fuse (normally connected in series with the supply). This feature is added to avoid destruction, if during fitting to the car, a mistake on the connection of the supply is made. OPEN GROUND When the ratio is in the ON condition and the ground is accidentally opened, a standard audio amplifier will be damaged. On the UTC PA05 protection diodes are included to avoid any damage. INDUCTIVE LOAD A protection diode is provided to allow use of the UTC PA05 with inductive loads. DC VOLTAGE The maxim operating DC voltage for the UTC PA05 is 18V. However the device can withstand a DC voltage up to 8V with no damage. This could occur during winter if two batteries are series connected to crank the engine. THERMAL SHUT-DOWN The presence of a thermal limiting circuit offers the following advantages: (1). An overload on the output (even if it is permanent), or an excessive ambient temperature can be easily withstood. (). The heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no device damage in the case of excessive junction temperature; all that happens is that Po (and therefore Ptot) and Id are reduced. The maximum allowable power dissipation depends upon the size of the external heatsink (i.e. its thermal resistance); Figure 4 shows the dissipation power as a function of ambient temperature for different thermal resistance. LOUDSPEAKER PROTECTION The circuit offers loudspeaker protection during short circuit for one wire to ground. UNISONIC TECHNOLOGIES CO., LTD 1 of 1
TYPICAL CHARACTORISTICS INFINITE HEATSINK UNISONIC TECHNOLOGIES CO., LTD 13 of 1
TYPICAL CHARACTORISTICS (cont.) POUT (W) THD (%) VoUT (V) ID (ma) UNISONIC TECHNOLOGIES CO., LTD 14 of 1
TYPICAL CHARACTORISTICS (cont.) Figure 1. Distortion versus Frequency (Stereo amplifier) Figure17. Supply Voltage Rejection versusc3 (Stereo amplifier) THD (%) 1. Vs=13.V Gv=50dB Po=.5W RL=1.Ω SVR (db) 10 30 40 Vs=14.4V fripple=100khz VRIPPLE=0.5v Gv=50dB RL=3.Ω 0.8 50 0.4 Po=.5W RL=3.Ω 0 10 10 10 3 10 4 f (Hz) 1 3 10 30 C3 (μf) Figure 18. Supply Voltage Rejection versus Frequency(Stereo amplifier) Figure 19. Supply Voltage Rejection versus C and C3 (Stereo amplifier) SVR (db) 0 50 40 30 Vs=14.4V Gv=50dB C3=10μF RG=0 RG=10KΩ SVR (db) 50 40 Vs=14.4V R L =4Ω Rg=10KΩ Gv=390/1Ω fripple =100Hz C= μf C= μf C=5 μf 30 10 10 10 3 f (Hz) 1 5 10 C3 (μf) Figure. Supply Voltage Rejection versus C and C3 (Stereo amplifier) 50 Vs=14.4V RL=4Ω Rg=10KΩ Gv=1000/10Ω t RIPPLE =100Hz C= μf C= μf 54 50 Figure 1. Gain versus Input Sensitivity (Stereo amplifier) Vs=14.4V f=1khz RL=4 Ω 500 SVR (db) 40 C=5 μf Gv (db) 4 4 38 PoUT=W 0 100 Gv 30 34 PoUT=0.5W 50 30 1 5 10 C3 (μf) 10 4 30 8 100 VI (mv) 4 300 8 UNISONIC TECHNOLOGIES CO., LTD 15 of 1
TYPICAL CHARACTORISTICS (cont.) Figure. Gain versus Input Sensitivity (Stereo amplifier) Figure 3. Total Power Dissipation and Efficiency versus Output Power (Bridge amplifier) 54 50 Vs=14.4V f=1khz RL=Ω 500 1 0 Gv (db) 4 4 38 34 30 10 PoUT=10W PoUT=0.5W 4 8 30 100 VI (mv) 4 300 8 0 100 50 Gv 8 PD (W)10 4 PD η 4 8 1 1 PoUT (W) Vs=14.4V RL=4Ω f=1khz Gv=50dB 40 η(%) Figure 4. Total Power Dissipation and Efficiency versus Output Power (Stereo amplifier) 0 PD PD (W) 4 η 40 η(%) Vs=13.V RL=3.Ω f=1khz Gv=50dB 4 8 10 1 UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD 1 of 1