WM8750BLGEFL/R Wolfson Microelectronics, WM8750BLGEFL/R Datasheet - Page 35

• Manufacturer Part Number: WM8750BLGEFL/R
• Description: Audio CODECs STEREO CODEC w/ HP 32-pin
• Manufacturer: Wolfson Microelectronics

Specifications of WM8750BLGEFL/R

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Production Data
w
THERMAL SHUTDOWN
Table 32 Headphone Switch
Figure 11 Example Headset Detection Circuit Using Normally-Open Switch
Figure 12 Example Headset Detection Circuit Using Normally-Closed Switch
The speaker and headphone outputs can drive very large currents. To protect the WM8750BL from
overheating a thermal shutdown circuit is included. If the device temperature reaches approximately
150°C and the thermal shutdown circuit is enabled (TSDEN = 1 ) then the speaker and headphone
amplifiers (outputs OUT1L/R, OUT2L/R and OUT3) will be disabled.
Table 33 Thermal Shutdown
R24 (18h)
Additional
Control (2)
R23 (17h)
Additional
Control (1)
REGISTER
REGISTER
ADDRESS
ADDRESS
6
5
8
BIT
BIT
HPSWEN
HPSWPOL
TSDEN
LABEL
LABEL
0
0
0
DEFAULT
DEFAULT
Headphone Switch Enable
0 : Headphone switch disabled
1 : Headphone switch enabled
Headphone Switch Polarity
0 : HPDETECT high = headphone
1 : HPDETECT high = speaker
Thermal Shutdown Enable
0 : thermal shutdown disabled
1 : thermal shutdown enabled
DESCRIPTION
DESCRIPTION
PD, Rev 4.0, August 2008
WM8750BL
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