Datasheet

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 1.5kΩ or higher pull-up resistor between FAULT and V
DD
.
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
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