Philips TDA7073AT-N3, TDA7073AT-N2, TDA7073A-N4, TDA7073A-N3, TDA7073A-N2 Datasheet

INTEGRATED CIRCUITS

DATA SHEET

TDA7073A; TDA7073AT

Dual BTL power driver

Product specification

1999 Aug 30

Supersedes data of 1994 July

File under Integrated Circuits, IC01

Philips Semiconductors	Product specification
Dual BTL power driver	TDA7073A; TDA7073AT

FEATURES

∙No external components

∙Very high slew rate

∙Single power supply

∙Short-circuit proof

∙High output current (0.6 A)

∙Wide supply voltage range

∙Low output offset voltage

∙Suited for handling PWM signals up to 176 kHz

∙ESD protected on all pins.

QUICK REFERENCE DATA

GENERAL DESCRIPTION

The TDA7073A/AT are dual power driver circuits in a BTL configuration, intended for use as a power driver for servo systems with a single supply. They are specially designed for compact disc players and are capable of driving focus, tracking, sled functions and spindle motors.

Missing Current Limiter (MCL)

A MCL protection circuit is built-in. The MCL circuit is activated when the difference in current between the output terminal of each amplifier exceeds 100 mA (typical 300 mA). This level of 100 mA allows for headphone applications (single-ended).

SYMBOL	PARAMETER	CONDITIONS	MIN.	TYP.	MAX.	UNIT
VP	positive supply voltage range		3.0	5.0	18	V
Gv	voltage gain		32.5	33.5	34.5	dB
IP	total quiescent current	VP = 5 V; RL = ∞	−	8	16	mA
SR	slew rate		−	12	−	V/μs
IO	output current		−	−	0.6	A
Ibias	input bias current		−	100	300	nA
fco	cut-off frequency	−3 dB	−	1.5	−	MHz

ORDERING INFORMATION

	TYPE NUMBER		PACKAGE
		NAME	DESCRIPTION	VERSION
	TDA7073A	DIP16	plastic dual in-line package; 16 leads (300 mil); long body	SOT38-1
	TDA7073AT	SO16	plastic small outline package; 16 leads; body width 7.5 mm	SOT162-1

1999 Aug 30

2

Philips Semiconductors	Product specification
Dual BTL power driver	TDA7073A; TDA7073AT
BLOCK DIAGRAM

positive input

negative input

positive input

negative input

VP
5
	I	+	i	16
2
1		Ι
1
1
	I	–	i	13
TDA7073A			SHORT - CIRCUIT AND
			THERMAL PROTECTION
TDA7073AT
	I	–	i	12
6
2	ΙΙ
7
2
	I	+	i	9
				3, 4, 8, 11, 15
10			14
ground 2	ground 1			n.c.

positive output 1

negative output 1

negative output 2

positive output 2

MCD382 - 1

Fig.1 Block diagram.

1999 Aug 30

3

Philips Semiconductors	Product specification
Dual BTL power driver	TDA7073A; TDA7073AT

PINNING

SYMBOL	PIN	DESCRIPTION
IN1−	1	negative input 1
IN1+	2	positive input 1
n.c.	3	not connected
n.c.	4	not connected
VP	5	positive supply voltage
IN2+	6	positive input 2
IN2−	7	negative input 2
n.c.	8	not connected
OUT2+	9	positive output 2
GND2	10	ground 2
n.c.	11	not connected
OUT2−	12	negative output 2
OUT1−	13	negative output 1
GND1	14	ground 1
n.c.	15	not connected
OUT1+	16	positive output 1

FUNCTIONAL DESCRIPTION

The TDA7073A/AT are dual power driver circuits in a BTL configuration, intended for use as a power driver for servo systems with a single supply. They are particular designed for compact disc players and are capable of driving focus, tracking, sled functions and spindle motors.

Because of the BTL configuration, the devices can supply a bi-directional DC current in the load, with only a single supply voltage. The voltage gain is fixed by internal

handbook, halfpage

IN1–	1		16	OUT1+
IN1+	2		15	n.c.
n.c.	3		14	GND1
n.c.	4	TDA7073A	13	OUT1 –
VP	5	TDA7073AT 12		OUT2 –
IN2 +	6		11	n.c.
IN2 –	7		10	GND2
n.c.	8		9	OUT2 +
		MCD381

Fig.2 Pin configuration.

feedback at 33.5 dB and the devices operate in a wide supply voltage range (3 to 18 V). The devices can supply a maximum output current of 0.6 A. The outputs can be short-circuited over the load, to the supply and to ground at all input conditions. The differential inputs can handle common mode input voltages from ground level up to (VP − 2.2 V with a maximum of 10 V). The devices have a very high slew rate. Due to the large bandwidth, they can handle PWM signals up to 176 kHz.

1999 Aug 30

4

Philips Semiconductors			Product specification
Dual BTL power driver		TDA7073A; TDA7073AT
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134).
SYMBOL	PARAMETER	CONDITIONS	MIN.	MAX.	UNIT
VP	positive supply voltage range		−	18	V
IORM	repetitive peak output current		−	1	A
IOSM	non repetitive peak output current		−	1.5	A
Ptot	total power dissipation
	TDA7073A	Tamb < 25 °C	−	2.5	W
	TDA7073AT	Tamb < 25 °C	−	1.32	W
Tstg	storage temperature range		−55	+150	°C
Tvj	virtual junction temperature		−	150	°C
Tsc	short-circuit time	see note 1	−	1	hr

Note

1. The outputs can be short-circuited over the load, to the supply and to ground at all input conditions.

THERMAL CHARACTERISTICS

SYMBOL	PARAMETER	CONDITIONS	VALUE	UNIT
Rth (j-a)	from junction to ambient
	TDA7073A	in free air; note 1	50	K/W
	TDA7073AT	in free air; note 2	95	K/W

Notes

1.TDA7073A: VP = 5 V; RL = 8 Ω; The typical voltage swing = 5.8 V and Vloss is 2.1 V therefore IO = 0.36 A and Ptot = 2 × 0.76 W = 1.52 W; Tamb (max) = 150 − 1.52 × 50 = 74 °C.

2.TDA7073AT: VP = 5 V; RL = 16 Ω; typical voltage swing = 5.8 V and Vloss is 2.1 V therefore IO = 0.18 A and Ptot = 2 × 0.38 W = 0.76 W; Tamb (max) = 150 − 0.76 × 95 = 77 °C.

1999 Aug 30

5