PA4101 [PROTEC]
PUNK with μP Supervisor; PUNK ，带有微处理器监控器
| 型号： | PA4101 |
| 厂家： | 
PROTEK DEVICES |
| 描述： | PUNK with μP Supervisor |
| 文件： | 总7页 (文件大小：1085K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PA4101
PUNK with µP Supervisor
ANALOG PRODUCTS DIVISION
Features
General Description
The PA4101 is a low power monolithic CMOS mixed signal
device. Its function is to control power supply transition noise
in audio circuits and systems. It requires very few external
components for its operation and works from low to medium
power supply voltages of 2.7V to 5.5V. As the power supply
ramps ON or OFF, the PA4101 ensures that audio inputs to
succeeding amplifiers are switched to a convenient low
impedance voltage rail. This causes the amplifiers to remain
silent as the power supply changes state (from ON to OFF
and vice versa).
•
•
•
•
•
•
•
•
Precision supply voltage monitoring
Reset Timeout Delay
36dB mute attenuation
2.7V to 5.5V single-supply operation
ESD protected outputs
Low supply current
Soft Mute out for driving additional channels
SOIC 14
Applications
Also included in the device is a digital control pin which can be
used by a control device such as a micro controller or a micro-
processor or any other digital controller to enable the audio
mute function. This supervisory circuit provides maximum
flexibility for monitoring power supplies and battery controlled
functions in systems without backup batteries.
•
•
•
•
•
•
•
Set-top boxes
Cell phones
PDA’s
Portable DVD players
Portable MP3 players
Notebook Audio
Critical µP Power Monitoring
A Reset is asserted during power up, power down and
brownout conditions. RESET is guaranteed down to Vcc of
1.0V.
Pin Layout
RESET
1
2
14
13
12
CEXT
Low line output. The early warning indicator goes low when
the supply voltage drops to a value 2% higher than the reset
threshold voltage
RESET
VCC
CHIPOP
SMUTEOUT
3
The PA4101 consumes less than 50μA of supply current while
providing more than 36dB of mute attenuation at the audio
lines. ESD (Human Body Model) protection circuitry on the
outputs protects the PA4101 and devices further up the signal
chain.
MCUVCC
4
5
11
10
NC
MUTE2
MUTE1
RCS
6
7
MUTECONT
NC
9
8
The PA4101 is available as a 14L SOIC package and is
specified for operation over the -40°C to +85°C temperature
range.
GND
Functional Diagram Typical Application
RST
µP Mute
RSET
µP VCC
Control
Chip
OP
Right Input
R2 220Ω
Right Output
2
1
4
Vcc
13
6
C4 47µF
R3 10KΩ
Mute2
Mute1
R1 500KΩ
PA4101
10
RCS
CEXT
5
9
C3 0.5µF
14
8
3
12
Left Input
R4 220Ω
Left Output
C2 10µF
C1 0.1µF
C5 47µF
R5 10KΩ
SMUTEOUT
Vcc
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288
www.protekanalog.com
69
95000 Rev. 0. 01/08
NOT FOR USE IN LIFE SUPPORT SYSTEMS
PA4101
PUNK with µP Supervisor
ANALOG PRODUCTS DIVISION
Absolute Maximum Ratings
Sustained operation at or above the following ratings is not recommended. Catastrophic and irreversible damage will occur to the device at or above
these ratings.
Symbol
Description
Rating
VX
Voltage at any pin
-0.3 to 7.0+0.3 V
IX
Current at any pin
500mA
150 ° C
200 ° C
270 ° C
TA
Ambient Temperature
Storage Temperature
Soldering Temperature
TS
TSOL
Recommended Operating Conditions:
Unless otherwise specified, VDD=2.7±10%, TA = Ambient Temperature = 25 deg C.
DC Operating Conditions
Symbol
Parameter
Condition
Limit
Typ
Unit
Min
Max
VDD
IDD
Positive Power Supply
VDD Current
Operating
2.7
5.5
1
V
mA
°C
V
Operating
TA
Ambient Temperature
Logic High O/P Voltage
Logic Low O/P Voltage
Logic High I/P Voltage
Logic Low I/P Voltage
FET ON Resistance
Operating
-30
85
VOH
VOL
VIH
VIL
IOH=100μA
IOL=-100μA
IIH=1μA
VDD-0.1
0.2
V
VDD-0.3
V
IIL=1μA
0.3
1.5
V
RON
VDD=2.7V, VDFET=0.4V
Ω
Supervisor Operating Conditions
Symbol
Parameter
Condition
Limit
Typ
2.5
Unit
Min
Max
VRST
VRSTH
VHYS
VHYS
TRD
Reset Voltage
Operating
V
Reset Threshold
VDD falling -40 to 85 degC
VDD=2.7V
-2.5
17
2.5
29
60
20
75
%
Reset Threshold hysteresis
Reset Threshold hysteresis
VDD – Reset Delay
Reset Time Out Period
mV
mV
μs
VDD=5.5V
36
VDD falling at 1mv/μs
TRP
44
ms
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288
www.protekanalog.com
70
95000 Rev. 0. 01/08
NOT FOR USE IN LIFE SUPPORT SYSTEMS
PA4101
PUNK with µP Supervisor
ANALOG PRODUCTS DIVISION
Mute Operating Conditions
Symbol
Parameter
Condition
Limit
Typ
Unit
Min
Max
Mute Control=VIL
Set by ext. capacitor CM
MOFFD
MSTD
Mute release delay
10
300
mS
mS
Mute Control transitions to VIH. Set by ext.
capacitor CEXT
Soft mute fall/rise time
1
300
MPDEL
Mute ON Delay
Power drops by 10%
5
μS
NFETV
NFET open drain volt
12
V
Pin Out
Pin
Name
Function
1
2
Inverted Reset output from the voltage supervisor
Reset output from the voltage supervisory circuit.
Positive power supply. 2.7V to 5.5V ±10%
Microprocessor power supply
RESET
RESET
3
VCC
4
MCUVCC
RCS
5
Power On mute delay resistor-capacitor connection.
Mute control signal from microprocessor.
Ground.
6
MUTECONT
GND
8
9
MUTE1
MUTE2
SMUTEOUT
CHIPOP
CEXT
Open Drain output of NFET 1
10
12
13
14
Open Drain output of NFET 2
Soft Mute OUT for multiple channels.
Supply voltage selector. Connect to GND for 2.7V, VCC for 5.5V.
Soft mute delay capacitor.
Operation Of Supervisor Circuit.
Supervisor Application
The reset input of a µP initializes the device into a known
state. The PA4101 supervisor circuitry asserts a forced reset
output to prevent code execution errors during Power-up,
power-down and brownout conditions.
VIN
VOUT
C
RESET is valid for VCC >1Volt. Once VCC exceeds the
threshold, an internal timer maintains the output for the reset
period timeout. After this interval, reset goes high.
VCC
RESET
R
GND
Any time VCC drops below the reset threshold, the reset
activates. When VCC again rises above the threshold, the
internal timer starts. Reset holds until VCC exceeds the reset
threshold for longer than the reset timeout period. After this
time the reset release
VRSTH
VIN
VOUT
RESET
tRP
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288
www.protekanalog.com
71
95000 Rev. 0. 01/08
NOT FOR USE IN LIFE SUPPORT SYSTEMS
PA4101
PUNK with µP Supervisor
ANALOG PRODUCTS DIVISION
Timing Diagram Supervisor
VRSTH
VRST
VCC
tRD
tRP
tRP
RESET
THEORY OF OPERATION Audio Muting
STARTUP
During Startup, the Power supply ramps from 0V to VCC.
This time is usually in excess of 20ms. As soon
as this change in voltage is sensed, PUNK latches the
Mute Controller outputs to HIGH, thus “muting” the lines.
This is the Startup Operation (figure 1). The duration for
which the controller outputs are latched
HIGH can be controlled by an external RC circuit.
When the voltage at this RC pin reaches a certain
threshold, the mute controller releases the lines
(Gate voltage is LOW) and Normal Operation starts.
Figure 1: Startup Pop-Noise Reduction
SHUTDOWN
During Shutdown, the reverse process happens. As the
power supply reaches the threshold on its way down, the
mute controller again latches the outputs to HIGH, thus
“muting” the lines (figure 2). This muting prevents
unwanted signal spikes from getting to the power
amplifiers. However, for optimal performance, it is
suggested to mute the lines using the MUTECONT signal
before power down. This process will ensure that the pop
noise involved during shutdown is diminished
SOFTMUTE
Figure 2: Shutdown Pop-Noise Reduction
During normal operation, PUNK is in OFF state. But if
there arises a situation when the audio lines need
to be muted, the designer can do this by asserting the
MUTECONT signal to HIGH. This will initiate a
SOFTMUTE sequence (figure 3). When the
MUTECONT signal is asserted, the mute controller
gradually ramps the control voltages in a “SOFT”
fashion so as to provide a soft mute operation. The
mute delay is fully controllable by the designer by using
an external capacitor at CEXT. Typical values of CEXT
are between 0.1μF and 0.5μF. The reverse happens
when the MUTECONT signal is released. This
operation is explained in detail in the Application Circuit
section.
Figure 3: SOFT mute operation
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288
www.protekanalog.com
72
95000 Rev. 0. 01/08
NOT FOR USE IN LIFE SUPPORT SYSTEMS
PA4101
PUNK with µP Supervisor
ANALOG PRODUCTS DIVISION
Typical Application Audio Muting.
VCC
3.3V
R15
10K
LINE OUT LEFT
LINE OUT RIGHT
C13
10µF
R17
100Ω
V.S. 1
C14
10µF
R16
10K
C15
10µF
R19
100Ω
FUNCTION.
GENERATOR
1V PTP 1KHz
SINE WAVE
R20
10K
R18
10K
10
9
MUTE 2
MUTE 1
12
3
SMUTEOUT
VCC
D1
5
MUTECONT
R13
240K
R14
22K
RCS
C16
10µF
6
GND
CEXT
14
C12
1µF
8
R21
10K
U2
74LS04
S1
Notes:
1. A Set Top Box audio output is “simulated” using C14, R15, R16 and VS 1.
2. VS 1 is a signal generator having an output impedance of 50Ohm.
3. U2 is the IC 74LS04.
4. U2 runs off of PUNK Vcc (Output of D1, C16 and R14).
5. Input to U2 is the Set Top Box Vcc
6. Switch S1 serves as a manual “Audio Mute” to enable the muting function.
7. Scope probes were attached to Set Top Box Power Supply and Line Out.
8. Waveform shown in Figure 4 to Figure 9
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288
www.protekanalog.com
73
95000 Rev. 0. 01/08
NOT FOR USE IN LIFE SUPPORT SYSTEMS
PA4101
PUNK with µP Supervisor
ANALOG PRODUCTS DIVISION
Figure 7: Shutdown Pop-Noise with PUNK
Figure 4: Startup Pop-Noise without PUNK
Figure8: Audio Mute Enable
Figure 5: Shutdown Pop-Noise without PUNK
Figure 6: Startup Pop-Noise with PUNK
Figure 9: Audio Mute Disable
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288
www.protekanalog.com
74
95000 Rev. 0. 01/08
NOT FOR USE IN LIFE SUPPORT SYSTEMS
PA4101
PUNK with µP Supervisor
ANALOG PRODUCTS DIVISION
Package Layout and Dimensions
Inches
Dim
MIN
TYP
MIN
P1 0.337 0.341 0.346
P2 0.230 0.238 0.244
P3 0.060 0.065 0.070
P4 0.150 0.155 0.157
P1
L1
L2
L3
p
0.014 0.016 0.019
0.007 0.009 0.010
0.023 0.026 0.029
0.050 0.050 0.050
0.004 0.006 0.008
P4
g
P2
L3
TOP VIEW
END VIEW
L2
P3
0.050” TYP
0.030” ± 0.005”
0.245” MIN
p
g
L1
SIDE VIEW
0.160” ± 0.005”
0.045” ± 0.005”
Recommended Pattern Layout
Life Support Policy
PROTEK ANALOG'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF PROTEK DEVICES
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288
75
www.protekanalog.com
95000 Rev. 0. 01/08
NOT FOR USE IN LIFE SUPPORT SYSTEMS
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