UTC2003

LINEAR INTEGRATED CIRCUIT

YOUWANG ELECTRONICS CO.LTD

6

1

2

4

5

3

1

2

4

5

3

2.2

µF

C3

15

µF

C4

10

µF

0.1

µF

1

Ω

RL=4

Ω

200

Ω

430

Ω

16

Ω

16

Ω

2.2

µF

Vs=14.4V

UTC2003

UTC2003

Fig.18 20W Bridge configuration application

The Values of the capacitors C3 and C4 are different to optimize the SVR(Typ. 40dB)

1

2

4

5

3

1

2

4

5

3

0.1

µF

C3

15

µF

RL=4

Ω

0.1

µF

Vs=14.4V

UTC2003

UTC2003

1nF

620

Ω

Fig.20 Low cost bridge configuration application circuit(Po=18W)

BUILT-IN PROTECTION SYSTEMS

Load dump voltage surge

The UTC2003 has a circuit which enables it to withstand a voltage pulse train, on pin 5, of the type shown in Fig. 23.

If the supply voltage peaks to more than 40V, then an LC filter must be inserted between the supply and pin 5, in

order to assure that the pulses at pin 5 will be head within the limits shown in Fig.22.

A suggested LC network is shown in Fig.23.With this network, a train of pulses with amplitude up to 120V and width

of 2ms can be applied at point A. This type of protection is ON when the supply voltage(pulsed or DC) exceeds

18V.For this reason the maximum operating supply voltage is 18V.