TFA9812HN PHILIPS [NXP Semiconductors], TFA9812HN Datasheet - Page 9

• Manufacturer Part Number: TFA9812HN
• Description: BTL stereo Class-D audio amplifier with I2S input
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
TFA9812_2
Preliminary data sheet
8.2.1 Control modes
8.2.2 Key operating modes
8.2 Functional modes
The block control defines the operational control settings of the TFA9812 in line with the
actual I
The PLL block creates the system clock and can take the I
external crystal as reference source.
The following protections are built into the TFA9812:
The two control modes of the TFA9812 are I
The control mode is selected via pin CSEL as shown in
Table 4.
In the functional descriptions below the control for the various functions will be described
for each control mode.
for the various TFA9812 functions.
There are six key operating modes:
CSEL Pin value
0
1
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Thermal Foldback (TF)
OverTemperature Protection (OTP)
OverCurrent Protection (OCP)
OverVoltage Protection (OVP)
UnderVoltage Protection (UVP)
Window Protection (WP)
Lock Protection (LP)
UnderFrequency Protection (UFP)
OverFrequency Protection (OFP)
Invalid BCK Protection (IBP)
DC-blocking
ElectroStatic Discharge (ESD)
In I
In Legacy mode a pin-based subset of the control options is available. The control
settings for features which are not available in Legacy mode are set to the default I
register settings.
In Sleep mode the voltage supplies are present, but power consumption for the whole
device is reduced to the minimum level. The output stages in Sleep mode are 3-state
and I
2
2
C mode the I
C settings and the pin-controlled settings.
2
C communication is disabled.
Control mode selection
Control mode
Legacy (no I
I
2
C
2
Rev. 02 — 22 January 2009
C format control is enabled.
Section 9.6
2
C)
summarizes the support given by each control mode
BTL stereo Class-D audio amplifier with I
2
C and legacy.
Table
2
S BCK, the MCLK or an
4.
© NXP B.V. 2009. All rights reserved.
TFA9812
2
S input
9 of 66
2
C