ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 76

• Manufacturer Part Number: ak4648
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

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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, 8 Ω . In High Power Mono
SPK Mode (SPKMN bit = “0”, PMSPL=PMSPR bit = “1”), the output power is 820mW at HVDD=3.6V, 8 Ω . 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.
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.
MS0625-E-01
Mode
Mono SPK
High Power Mono SPK
Stereo SPK
Speaker-Amp
*1: The output signal is Mono Mixing [(L+R)/2]. The output power is 640mW at HVDD=3.6V, 8 Ω .
*2: The output signal is Mono Mixing [(L+R)/2]. The output power is 820mW at HVDD=3.6V, 8 Ω .
Table 65. SPK-Amp Internal gain (Gain of mono mixing is not included.), N/A: Not available
Table 64. Speaker Output Mode Setting (PD: Power-Down, PU: Power-Up)
SPKG2-0 bits
000
001
010
011
100
101
110
111
SPKMN bit
0
0
0
1
1
1
0
1
ALC bit = “0”
PMSPL bit
+10.65dB
+12.65dB
+4.43dB
+6.43dB
-6dB
0dB
N/A
N/A
0
1
0
1
0
0
1
1
- 76 -
Gain
PMSPR bit
ALC bit = “1”
0
0
1
1
0
1
0
1
+12.65dB
+14.65dB
+6.43dB
+8.43dB
+2dB
-4dB
N/A
N/A
SPLP/SPLN pin
PU: Lch
PU: Lch
PU (*1)
PU (*2)
PD
PD
PD
PD
(default)
SPRP/SPRN pin
PU: Rch
PU: Rch
PU (*1)
PD
PD
PD
PD
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[AK4648]
2007/06