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PDF SA58635 Data sheet ( Hoja de datos )
| Número de pieza | SA58635 | |
| Descripción | 2 X 25 MW Class-G Stereo Headphone Driver | |
| Fabricantes | NXP Semiconductors | |
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SA58635
2 × 25 mW class-G stereo headphone driver with I2C-bus
volume control
Rev. 01 — 26 March 2010
Product data sheet
1. General description
The SA58635 is a stereo, class-G headphone driver with I2C-bus volume control. The
I2C-bus control allows maximum flexibility with digital volume control, independent
channel enable and mute control.
The output of the SA58635 is referenced around true ground zero. It is designed to
operate at the low supply current of 1.5 mA making it battery friendly. A unique power
management technique provides class-G power efficiency by using a buck converter to
step down the battery supply from a typical lithium ion battery (4.8 V to 2.3 V). Efficiency is
further increased by allowing the output amplifier/driver to operate at multiple voltage rails
based on the output/input swing.
The SA58635 delivers 2 × 25 mW minimum into 16 Ω and 32 Ω loads. The SA58635
provides thermal shutdown and self limiting current protection.
The SA58635 is a high fidelity HP driver amplifier with a S/N of 100 dB minimum. An
excellent PSRR of more than 100 dB, differential input circuit topology allows for
maximum noise immunity in the noisy mobile phone environment.
The SA58635 is available in a 16-bump WLCSP (Wafer Level Chip-Size Package) making
it ideal choice for cellular handsets and portable media players.
2. Features
Power supply range: 2.3 V to 5.5 V
High efficiency employing class-G dynamic power management
2 × 25 mW into 16 Ω or 32 Ω at THD+N = 1 %
Very low THD+N at 0.02 % at VO of 0.7Vo(RMS) and RL of 47 Ω
Integrated charge pump to eliminate DC blocking capacitors, reduce cost and PCB
space while improving low frequency audio fidelity
Excellent PSRR: > 100 dB
S/N performance of 100 dB minimum
Low supply current: 1.5 mA typical
Low shutdown current: 5 μA maximum
I2C-bus interface for −59 dB to ±4 dB volume control, independent channel enable,
mute and software shutdown
Self limiting current with thermal protection and ground loop noise suppression
Pop-and-click suppression
Available in 1.7 mm × 1.7 mm 16-bump WLCSP
1 page  
NXP Semiconductors
www.DataSheet4U.com
SA58635
2 × 25 mW class-G stereo headphone driver
7.3.1 MODE1 register, MODE1
Table 4. MODE1 - Mode register 1 (address 01h) bit description
Legend: * default value.
Bit Symbol
Access
Value Description
7 HP_EN_L R/W
0* Left channel inactive. A zero will turn off the left
channel.
1 Left channel active.
6 HP_EN_R R/W
0* Right channel inactive. A zero will turn off the right
channel.
1 Right channel active.
5-
read only 0*
Reserved; always reads back as a 0.
4-
read only 0*
Reserved; always reads back as a 0.
3-
read only 0*
Reserved; always reads back as a 0.
2-
read only 0*
Reserved; always reads back as a 0.
1 THERMAL read only 0* Device is operating normally.
1 Device is in thermal shutdown.
0 SWS
R/W 0* Device is enabled.
1 Software shutdown; charge pump is disabled.
7.3.2 Volume control register, VOLCTL
Table 5. VOLCTL - Volume control register (address 02h) bit description
Legend: * default value.
Bit Symbol
Access
Value Description
7 MUTEL
R/W
0 A zero indicates that the left channel is not muted.
1* Left channel is muted.
6 MUTER R/W
0 A zero indicates that the right channel is not
muted.
1* Right channel is muted.
5 to 1 VOL[4:0]
R/W
0* These bits indicate the volume on the outputs per
the gain table shown in Table 9.
0-
read only 0*
This bit is reserved and will always return a zero.
7.3.3 High-impedance register, HIZ
Table 6. HIZ - High-impedance register (address 03h) bit description
Legend: * default value.
Bit Symbol
Access
Value Description
7 to 2 -
read only 0*
Unused; always returns 0.
1 HIZL
R/W 0* Device outputs are not in high-impedance.
1 Device outputs are in high-impedance.
0 HIZR
R/W 0* Device outputs are not in high-impedance.
1 Device outputs are in high-impedance.
SA58635_1
Product data sheet
Rev. 01 — 26 March 2010
© NXP B.V. 2010. All rights reserved.
5 of 30
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SA58635
2 × 25 mW class-G stereo headphone driver
10. Limiting values
Table 10. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).[1]
Symbol Parameter
Conditions
VDD supply voltage
Active mode
Shutdown mode
VI input voltage
VIO input/output voltage
IBR breakdown current
P power dissipation
INRN, INRP, INLN, INLP
SCL, SDA
continuous
WLCSP16; derating factor 10 mW/K
Tamb
Tj
Tstg
VESD
ambient temperature
junction temperature
storage temperature
electrostatic discharge
voltage
Tamb = 25 °C
Tamb = 70 °C
Tamb = 85 °C
operating in free air
operating
human body model
machine model
charged-device model
device use level:
IEC61000-4-2 level 4, contact
IEC61000-4-2 level 4, air discharge
Min
−0.3
−0.3
−0.3
VAGND − 0.5
[2] -
Max
+6.0
+6.0
2.1
VDD
200
-
-
-
−40
−40
−65
±4000
±300
±750
1000
550
400
+85
+85
+150
-
-
-
[3] ±30
[3] ±30
-
-
Unit
V
V
V
V
mA
mW
mW
mW
°C
°C
°C
V
V
V
kV
kV
[1] VDD is the supply voltage on pin AVDD.
[2] Breakdown current of output protection diodes.
[3] ESD shock needs to be conducted to the connector pins (see Figure 10).
All functions of a device/system perform as designed during and after exposure to a disturbance.
Remark: External ESD suppressor ASIP protects the amplifier outputs. Suppressor is between amplifier and connector;
15 Ω serial resistance + 5 nF capacitor and Zener diodes (14 V breakdown voltage) connected to the ground. In addition, there is a
ferrite bead in series between suppressor and connector (see Figure 10).
Remark: Air discharge test can be ignored if contact discharge test range is increased to corresponding same voltages as air discharge
(reason: contact discharge is more stable and repeatable test than air discharge).
SA58635
OUTR
SGND
OUTL
AGND
Fig 10. ESD suppressor ASIP
A1 A2
ESD
ASIP
B2
C1 C2
IP5311CX5/LF
FB
AGND
FB
shield
002aae119
SA58635_1
Product data sheet
Rev. 01 — 26 March 2010
© NXP B.V. 2010. All rights reserved.
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