AK4648 Datasheet, PDF (76/119 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/SPK-AMP

[AK4648]
■ Speaker-Amp
Speaker output mode is selected by SPKMN bit and Power ON/OFF of Speaker-Amp is controlled by PMSPL and
PMSPR bits. In Stereo SPK Mode (SPKMN bit = “1”, PMSPL=PMSPR bits = “1”) and Mono SPK Mode (SPKMN bit =
“0”, PMSPL bit = “1” or PMSPR bit = “1”), the output power is 640mW/ch at HVDD=3.6V, 8Ω. In High Power Mono
SPK Mode (SPKMN bit = “0”, PMSPL=PMSPR bit = “1”), the output power is 820mW at HVDD=3.6V, 8Ω. When
using High Power Mono SPK mode, SPLP pin should be connected to SPRP pin and SPLN pin should be connected to
SPRN pin. When SPKMN bit is changed, PMSPL and PMSPR bits should be set to “0”. Power-Save mode is controlled
by SPPSN bit.
Mode
SPKMN bit PMSPL bit PMSPR bit SPLP/SPLN pin SPRP/SPRN pin
Mono SPK
0
0
0
PD
PD
0
1
0
PU (*1)
PD
0
0
1
PD
PU (*1)
High Power Mono SPK
0
1
1
PU (*2)
-
Stereo SPK
1
0
0
PD
PD
1
0
1
PD
PU: Rch
1
1
0
PU: Lch
PD
1
1
1
PU: Lch
PU: Rch
*1: The output signal is Mono Mixing [(L+R)/2]. The output power is 640mW at HVDD=3.6V, 8Ω.
*2: The output signal is Mono Mixing [(L+R)/2]. The output power is 820mW at HVDD=3.6V, 8Ω.
Table 64. Speaker Output Mode Setting (PD: Power-Down, PU: Power-Up)
Power supply for Speaker-Amp (HVDD) is 2.6V to 5.0V. The DAC or LIN2/RIN2/LIN3/RIN3/LIN4/RIN4 signal is
input to the Speaker-amp as Mono: [(L+R)/2] or stereo signal. The input signal selects Mono or Stereo by using SPKMN
bit. The Speaker-amp is mono/stereo with BTL output. The gain is set by SPKG2-0 bits. Output level depends on AVDD
voltage and SPKG2-0 bits.
SPKG2-0 bits
Gain
ALC bit = “0”
ALC bit = “1”
000
+4.43dB
+6.43dB
(default)
001
+6.43dB
+8.43dB
010
+10.65dB
+12.65dB
011
+12.65dB
+14.65dB
100
0dB
+2dB
101
-6dB
-4dB
110
N/A
N/A
111
N/A
N/A
Table 65. SPK-Amp Internal gain (Gain of mono mixing is not included.), N/A: Not available
MS0625-E-01
- 76 -
2007/06