TDA7265

The TDA7265 is class AB dual Audio power amplifier assembled in the Multiwatt package, specially designed for high quality sound application as Hi-Fi music centers and stereo TV sets.

Figure 1: Typical Application Circuit in Split Supply

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Multiwatt11

ORDERING NUMBER:

TDA7265

(Demo Board Schematic)

The recommended values of the external compo- nents are those shown are the demo board schematic different values can be used: the following table can help the designer.

COMPONENTS	RECOMMENDED VALUE	PURPOSE	LARGER THAN RECOMMENDED VALUE	SMALLER THAN RECOMMENDED VALUE
R1	10K W	Mute Circuit	Increase of Dz Biasing Current
R2	15K W	Mute Circuit	Vpin # 5 Shifted Downward	Vpin # 5 Shifted Upward
R3	18K W	Mute Circuit	Vpin # 5 Shifted Upward	Vpin # 5 Shifted Downward
R4	15K W	Mute Circuit	Vpin # 5 Shifted Upward	Vpin # 5 Shifted Downward
R5, R8	18K W	Closed Loop Gain Setting (*)	Increase of Gain
R6, R9	560 W	Closed Loop Gain Setting (*)	Decrease of Gain
R7, R10	4.7 W	Frequency Stability	Danger of Oscillations	Danger of Oscillations
C1, C2	1 m F	Input DC Decoupling		Higher Low Frequency Cutoff
C3	1 m F	St-By/Mute Time Constant	Larger On/Off Time	Smaller On/Off Time
C4, C6	1000 m F	Supply Voltage Bypass		Danger of Oscillations
C5, C7	0.1 m F	Supply Voltage Bypass		Danger of Oscillations
C8, C9	0.1 m F	Frequency Stability
Dz	5.1V	Mute Circuit
Q1	BC107	Mute Circuit

Pin	Name	Type	Description
1	IN1+	I	Non-inverting input channel 1
2	IN1-	I	Inverting input channel 1
3	OUT1	O	Output channel 1
4	-VS	P	Negative supply voltage
5	MUTE/ST-BY	I	Mute/Stand-by control
6	+VS	P	Positive supply voltage
7	OUT2	O	Output channel 2
8	IN2-	I	Inverting input channel 2
9	IN2+	I	Non-inverting input channel 2
10	GND	G	Ground
11	GND	G	Ground

Symbol	Parameter	Value	Unit
V S	DC Supply Voltage	- 25	V
I O	Output Peak Current (internally limited)	4.5	A
P tot	Power Dissipation T case = 70 C	30	W
T op	Operating Temperature	-20 to 85	C
T stg , T j	Storage and Junction Temperature	-40 to +150	C

Symbol	Description	Description	Value	Unit
R th j-case	Thermal Resistance Junction-case	Max	2	C/W

Fig 2: Typical Application Circuit in Single Supply

ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VS = + 20V; RL = 8 W ; RS = 50 W ; GV = 30dB; f = 1KHz; Tamb = 25 C, unless otherwise specified.)

Symbol	Parameter	Test Condition	Min.	Typ.	Max.	Unit
V S	Supply Range		+5		+25	V
I q	Total Quiescent Current			80	130	mA
V OS	Input Offset Voltage		-20		+20	mV
I b	Non Inverting Input Bias Current			500		nA
P O	Music Output Power (*)	THD = 10%; R L = 8 W ; V S = + 22.5V		32		W
P O	Output Power	THD = 10% R L = 8 W ; V S + 16V; R L = 4 W	20	25 25		W W
P O	Output Power	THD = 1% R L = 8 W ; V S + 16V; R L = 4 W		20 20		W W
THD	Total Harmonic Distortion	R L = 8 W ; P O = 1W; f = 1KHz		0.01		%
THD	Total Harmonic Distortion	R L = 8 W ; P O = 0.1 to 15W; f = 100Hz to 15KHz			0.7	%
THD	Total Harmonic Distortion	R L = 4 W ; P O = 1W; f = 1KHz		0.02		%
THD	Total Harmonic Distortion	R L = 4 W ; V S + 16V; P O = 0.1 to 12W; f = 100Hz to 15KHz			1	%
C T	Cross Talk	f = 1KHz f = 10KHz		70 60		dB dB
SR	Slew Rate			10		V/ m s
G OL	Open Loop Voltage Gain			80		dB
e N	Total Input Noise	A Curve f = 20Hz to 22KHz		3 4	8	m V m V
R i	Input Resistance		15	20		K W
SVR	Supply Voltage Rejection (each channel)	fr = 100Hz Vr = 0.5V		60		dB
T j	Thermal Shut-down Junction Temperature			145		C
MUTE FUNCTION [ref: +V S ]	MUTE FUNCTION [ref: +V S ]	MUTE FUNCTION [ref: +V S ]	MUTE FUNCTION [ref: +V S ]	MUTE FUNCTION [ref: +V S ]	MUTE FUNCTION [ref: +V S ]	MUTE FUNCTION [ref: +V S ]
VT MUTE	Mute / Play Threshold		-7	-6	-5	V
A M	Mute Attenuation		60	70		dB
STAND-BY FUNCTION [ref: +V S ]	STAND-BY FUNCTION [ref: +V S ]	STAND-BY FUNCTION [ref: +V S ]	STAND-BY FUNCTION [ref: +V S ]	STAND-BY FUNCTION [ref: +V S ]	STAND-BY FUNCTION [ref: +V S ]	STAND-BY FUNCTION [ref: +V S ]
VT ST-BY	Stand-by / Mute Threshold		-3.5	-2.5	-1.5	V
A ST-BY	Stand-by Attenuation			110		dB
I q ST-BY	Quiescent Current @Stand-by			3		mA

is the maximal power which the amplifier is capable of producing across the rated load resistance (regardless of non linearity)

Note : (*) FULL POWER up to. VS = -22.5V with RL = 8 W and VS = -16V with RL = 4 W MUSIC POWER 1 sec after the application of a sinusoidal input signal of frequency 1KHz.

Figure 3: Quiescent Current vs. Supply Voltage

Figure 5: Output Power vs. Supply Voltage

Figure 7: Output Power vs. Supply Voltage

Figure 4: Frequency Response

Figure 6: T.H.D. vs. Output Power

Figure 8: T.H.D. vs. Output Power

Figure 9: Quiescent Current vs. Pin # 5 Voltage

Figure 11: SVR vs. Frequency

Figure 13: Power Dissipaton vs. Output Power

Figure 10: Attenuation vs. Pin # 5 Voltage

Figure 12: Crosstalk vs. Frequency

Figure 14: Power Dissipaton vs. Output Power