FDA903U datasheet(15/80 Pages) STMICROELECTRONICS

15 / 80 page

DS12498 Rev 2

15/80

FDA903U

Electrical specifications

4.4

Typical curves of the main electrical parameters

CDSAT

Clip det sat. voltage

CD on; ICD = 1 mA

150

300

CDLK

Clip det leakage current CD pin at 3.6 V

μA

Vofflin

Input DC offset

detection threshold

Theshold at which an offset present at inputs

is detected

-18

Voffout

Output DC offset

detection threshold(9)

Input high pass filter disable

±1.4

±2

±2.6

Current sensing(10)

Current sensing RMS

noise 20 Hz-20 kHz

A-weighted (Equivalent mA)

2.95

[Equivalent mA]

3.66

Current sensing offset

Equivalent mA in output when no output signal -150

+150

Current sensing gain

Equivalent mA in output / mA flowing in the

load

0.8

1.2

1. Value measured using output coil with the following characteristics: core saturation current higher than 10 A, RS at

400 kHz = 145 mΩ.

2. Measured at bench during product validation (values before LC filter). Guaranteed by correlation factor.

3. Parameter values based on bench measurements (guaranteed by correlation with overvoltage shutdown).

4. The thermal warnings are always in tracking.

5. Test correlated to the RdsON measurement (ATE test).

6. When selecting the low gain, also the thresholds for "DC diagnostic" function and "Open load in play detector" function

scale of the same factor with respect to standard gain configuration.

7. See Chapter 7: Muting function architecture for more details.

8. Guaranteed by correlation.

9. Measured at bench during product validation.

10. Values measured by using Fs = 48 kHz and IMAX = 8 A (IB8[7-6] = 11).

Table 5. Electrical characteristics (continued)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

Figure 4. Efficiency and power dissipation

(Vs = 14.4 V, RL = 1 x 4 Ω, f = 1 kHz sine wave)

Figure 5. Efficiency and power dissipation

(Vs = 14.4 V, RL = 1 x 4 Ω, pink noise)

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