STA333W STMicroelectronics, STA333W Datasheet - Page 38

• Manufacturer Part Number: STA333W
• Description: DIG AUDIO SYSTEM, 2-CH, 36POWERSSOP
• Manufacturer: STMicroelectronics

Specifications of STA333W

• Svhc: No SVHC (15-Dec-2010)
• Package / Case: PowerSSO
• Interface: I2S
• No. Of Pins: 36
• Operating Temperature Range: 0°C To +70°C
• Supply Voltage Max: 18V
• Supply Voltage Min: 4.5V
• Termination T: RoHS Compliant
• Interface Type: I2S
• Rohs Compliant: Yes

Register description
6.11
6.11.1
38/49
Output limit register (addr 0x34)
Thermal and overcurrent warning output limit register
The STA333W provides a simple mechanism for reacting to a thermal or overcurrent
warning in the power device. When the TWARN or OCWARN status bit is asserted, the
output is limited to the OLIM setting. The limit can be adjusted by modifying the thermal
warning/overcurrent output limit value. As for the normal postscale, the register value
represents an 8-bit signed fractional number. This number is extended to a 24-bit number,
by adding zeros to the right, and then directly multiplied by the data on both channels. The
scaling value range is from 0x80 = -1 to 0x7F = 0.992. To avoid phase changes in the output
signal only the positive range is used (0x00 to 0x7F). The default setting of 0x5A provides a
-3-dB limit.
If the cause of the limiting is a thermal warning, the output limiting is removed when the
thermal warning situation disappears. If the cause of the limiting is an overcurrent warning,
output limiting remains in effect until the device is reset.
Table 46.
0x7F
0x7E
....
0x5A
....
0x40
....
0x28
....
0x01
0x00
OLIM7
D7
0
Output limit values for thermal and overcurrent warnings
OLIM6
D6
1
OLIM[7:0]
OLIM5
D5
0
Doc ID 13365 Rev 2
OLIM4
D4
1
0.06
0.13
....
3.0
....
6.0
....
10
....
42
Inf
OLIM3
D3
1
OLIM2
Attenuation (dB)
D2
0
OLIM1
D1
1
STA333W
OLIM0
D0
0