LM48100Q

SNAS470D – OCTOBER 2008 – REVISED MARCH 2013

www.ti.com

If the output current exceeds the current limit, the device outputs are disabled and FAULT is driven low. The

output over-current detection circuitry remains active when the diagnostics have been disabled (DG_EN = 0).

Thermal Overload Detection

The LM48100Q has thermal overload threshold of 170°C (typ). If the die temperature exceeds 170°C, the outputs

are disabled and FAULT is driven low. The thermal overload detection circuitry remains active when the

diagnostics have been disabled (DG_EN = 0).

OPEN FAULT OUTPUT

The LM48100Q features an open drain, fault indication output, FAULT , that asserts when a fault condition is

detected by the device. FAULT goes low when either an output short, output open, over current, or thermal

overload fault is detected, and the diagnostic test is not ignored, see FAULT DETECTION CONTROL

REGISTER section. FAULT remains low even after the fault condition has been cleared and the diagnostic tests

are repeated. Toggle DG_RESET to clear FAULT .

Connect a 1.5k

VOLUME CONTROL

Table 7. Volume Control

Volume Step

VOL4

VOL3

VOL2

VOL1

VOL0

Gain (dB)

1

0

0

0

0

0

–80

2

0

0

0

0

1

–54

3

0

0

0

1

0

–40.5

4

0

0

0

1

1

–34.5

5

0

0

1

0

0

–30

6

0

0

1

0

1

–27

7

0

0

1

1

0

–24

8

0

0

1

1

1

–21

9

0

1

0

0

0

–18

10

0

1

0

0

1

–15

11

0

1

0

1

0

–13.5

12

0

1

0

1

1

–12

13

0

1

1

0

0

–10.5

14

0

1

1

0

1

–9

15

0

1

1

1

0

–7.5

16

0

1

1

1

1

–6

17

1

0

0

0

0

–4.5

18

1

0

0

0

1

–3

19

1

0

0

1

0

–1.5

20

1

0

0

1

1

0

21

1

0

1

0

0

1.5

22

1

0

1

0

1

3

23

1

0

1

1

0

4.5

24

1

0

1

1

1

6

25

1

1

0

0

0

7.5

26

1

1

0

0

1

9

27

1

1

0

1

0

10.5

28

1

1

0

1

1

12

29

1

1

1

0

0

13.5

30

1

1

1

0

1

15

31

1

1

1

1

0

16.5

14

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