تراشه آمپلی فایر TDA7073A

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 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

Notes

1. With a load connected to the outputs the quiescent current will increase, the maximum value of this increase being

equal to the DC output offset voltage divided by RL.

2. The output voltage swing is typically limited to 2 ´ (VP - 2.1 V) (see Fig.4).

3. The noise output voltage (RMS value), unweighted (20 Hz to 20 kHz) is measured with RS = 500 W.

4. The ripple rejection is measured with RS = 0 Wand f = 100 Hz to 10 kHz. The ripple voltage of 200 mV (RMS value)

is applied to the positive supply rail.

5. The DC common mode voltage range is limited to (VP - 2.2 V with a maximum of 10 V).

6. The common mode rejection ratio is measured at Vref = 1.4 V, VI(CM) = 200 mV and f = 1 kHz