AK4951AEN Datasheet, PDF (63/105 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4951A]
LOSEL bit Don't care
"L"
PMSL bit
SLPSN bit
>1ms
>0ms
SPP pin
Hi-Z
Hi-Z
SPN pin
SVDD/2
(AVDD/2)
SVDD/2
(AVDD/2)
Figure 43. Power-up/Power-down Timing for Speaker-Amp
■ Thermal Shutdown Function
When the internal temperature of the device rises up irregularly (e.g. Output pins of speaker-amp or
headphone-amp are shortened), the speaker-amp, the headphone-amp and charge-pump circuit are
automatically powered down and then THDET bit becomes “1” (thermal shutdown). When TSDSEL bit =
“0” (default), the internal temperature goes down and the thermal shutdown is released, the speaker-amp,
the headphone-amp and charge-pump circuit is powered up automatically and THDET bit returns to “0”.
When TSDSEL bit = “1”, these blocks will not return to a normal operation until being reset by the PDN
pin. THDET bit becomes “0” by this PDN pin reset.
016001936-E-00
- 63 -
2016/03