PTC PT2305

Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2.5W × 2 Class AB Audio Power Amplifier
PT2305
EDESCRIPTION
The PT2305 is an audio power amplifier utilizing CMOS Technology specially designed for audio
purpose. It can deliver 2.5W × 2 power output to the 4Ω load. The power consumption is very low in
stand-by. Total harmonic distortion is lower than 0.03%. The output structure is BTL (Bridge-Tied Load)
mode for driving speaker load mode. Built-in over-temperature protection, package size is not occupies
PCB space. It is suitable for small or portable products.
FEATURES
•
•
•
•
•
•
•
CMOS technology
Operating voltage: 2.7V ~ 6V
Output power 2.5W × 2 (4Ω/10%THD)
Built-in 31 steps volume controller
Suppress the pop and click noise when mode changed
Extreme low current consumption in Shutdown mode (Icc<0.7µA)
Built-in over temperature protection
APPLICATIONS
•
•
•
•
LCD monitor or TV
Portable audio
Multimedia speakers
Other audio applications
PT2305 V1.1
-1-
May, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2.5W × 2 Class AB Audio Power Amplifier
PT2305
BLOCK DIAGRAM
Mute
10KΩ
Mute
C ontrol
10KΩ
DC_Vo1
-OUT1
+
20KΩ
-
Vo 1
Vin1
20KΩ
+
-
+OUT 1
+
Bias
Vin2
+
-
Volume
C ontrol
31 steps
Bias
Vo2
+
-
Shutdown
VD D
GND
Bypass
Power
Management
20KΩ
+
-
Click and P op
S uppression
Circuitry
10KΩ
PT2305 V1.1
-2-
+OUT 2
20KΩ
-OUT2
10KΩ
May, 2005
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
PIN CONFIGURATION
Bypass
1
20
GND
GND
2
19
GND
-Out 1
3
18
-OUT 2
VD D
4
17
VD D
+Out 1
5
16
+Out 2
GND
6
15
GND
Shutdown
7
14
Vo 2
Mute
8
13
Vin 2
VD D
9
12
Vin 1
10
11
Vo 1
DC_Vol
P T 23 0 5
PIN DESCRIPTION
Pin Name
Bypass
GND
-OUT1
VDD
+OUT1
Shutdown
Mute
DC_Vol
Vo1
Vin1
Vin2
Vo2
+OUT2
-OUT2
PT2305 V1.1
I/O
Description
O Internal bias reference bypassing
Ground
O Channel 1 Output (-)
Power Supply Input
O Channel 1 Output (+)
Shutdown pin。Entire IC into the shutdown mode when this
I
pin connected to the VDD
I Mute Pin, Output muted when it connected to VDD
I DC Volume control input pin
I Channel 1 output for external feedback circuit
I Channel 1 audio input
I Channel audio input
I Channel 2 output for external feedback circuit
O Channel 2 Output (+)
O Channel 2 Output (-)
-3-
Pin No.
1
2, 6, 15, 19, 20
3
4, 9, 17
5
7
8
10
11
12
13
14
16
18
May, 2005
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
FUNCTION DESCRIPTION
POWER SUPPLY
The operating voltage of PT2305 is from 2.7V to 6V, In general operation 5V is recommended. When
the supply voltage less then 3V the IC can work properly, but the distortion reading will rise. After the
supply voltage over 6.5V, the higher stand-by current consumption will rising the temperature on chip
surface。
SHUTDOWN
When the DC supply still powered the chip Vcc, pull-up the shutdown pin to the Vcc level will take the
chip into the shutdown mode. After the shutdown mode is active the total current consumption is less
than 0.7µA. and the all of input or output pins no voltage output。When shutdown pin set to GND, the
IC is back to the normal operation.
Shutdown Pin
VDD
GND
Output State
Shutdown ON
Normal
MUTE
When the mute pin is connected to the VDD all of outputs signal will be muted immediately, otherwise
connected to the GND the IC is back to the normal operation.
Mute Pin
VDD
GND
Output State
Mute ON
Normal
INPUT GAIN ADJUST
The input gain of the PT2305 can be adjust by the external resistor, in normal operation 0dB gain
setting is recommended, please refer to the application circuit. If the source output level is not so high
(ex: < 2Vpp), increase the input gain can get the higher volume. The minimum value of the input series
resistance is 10KΩ for the modest input impedance.
To make sure the input stage will not be distortion by overload, please confirm the input signal level, for
the gain set please refer to the following table:
Operating Voltage
VDD=3V
VDD=5V
Input Gain=-6dB
Vin <5Vpp
Vin <8Vpp
Input Gain=0dB
Vin <2.5Vpp
Vin<4Vpp
Input Gain=+6dB
Vin <1.25Vpp
Vin<2Vpp
OVER TEMPERATURE PROTECTION
The PT2305 has a built-in over temperature protection circuit, it will turn off all power output when the
chip temperature over 150℃, ,the chip will return to normal operation automatically after the
temperature cool down to 105℃.
PT2305 V1.1
-4-
May, 2005
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
POP AND CLICK SURPPRESS
A power amplifier uses single supply voltage may almost have noise on output in the power-on period.
It is because of the output DC potential needs time to stable on 1/2Vcc, the period relative with the
capacitance on the Bypass pin. Higher CB value will extend the stable time, and also can suppress the
noise when power-on. In supply voltage=5V and CB=1µF, stable time is about 200mS。The value of CB
also relative with the value of the DC blocking capacitor connected in input terminal. In general
condition the time constant of DC blocking capacitor should be less than CB stable time.
Recommend parts values please refer to application circuit.
CB and delay time, please refer to following table:
CB
0.01uF
0.1uF
0.22uF
0.47uF
1.0uF
TON
2ms
20ms
44ms
94ms
200ms
VOLUME CONTROLLER
The PT2305 has a built-in 31 steps volume controller, output volume is determinate by voltage applied
at the DC Vol pin. Range is from 0dB ~ -75dB. The lower DC voltage is means more volume
attenuation. The attenuation levels are -1dB/step from 0dB ~ -6dB, -2dB/step from -6dB ~ -36dB,
-3dB/step from -36dB ~ -47dB, -4dB/step from -47dB ~ -51dB, -5dB/step from -51dB ~ -66dB and
-12dB/step to the last step at -78dB.
About relation between the volume setup and DC Vol, please refer to the following table.
PT2305 V1.1
-5-
May, 2005
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
VOLUME CONTROL TABLE
Step
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Gain
(dB)
0
-1
-2
-3
-4
-5
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
-32
-34
-36
-39
-42
-45
-47
-51
-56
-61
-66
-78
PT2305 V1.1
Voltage Range (%VDD)
Low
High
Recommended
77.5 % 100.00 %
100.000%
75.0 %
78.5 %
76.875 %
72.5 % 76.25 %
74.375 %
70.0 % 73.75 %
71.875 %
67.5 % 71.25 %
69.375 %
65.0 % 68.75 %
66.875 %
62.5 % 66.25 %
64.375 %
60.5 % 63.75 %
61.875 %
57.5 % 61.25 %
59.375 %
55.0 % 58.75 %
56.875 %
52.5 % 56.25 %
54.375 %
50.0 % 53.75 %
51.875 %
47.5 % 51.25 %
49.375 %
45.0 % 48.75 %
46.875 %
42.5 % 46.25 %
44.375 %
40.0 % 43.75 %
41.875 %
37.5 % 41.25 %
39.375 %
35.0 % 38.75 %
36.875 %
32.5 % 36.25 %
34.375 %
30.0 % 33.75 %
31.875 %
27.5 % 31.25 %
29.375 %
25.0 % 28.75 %
26.875 %
22.5 % 26.25 %
24.375 %
20.0 % 23.75 %
21.875 %
17.5 % 21.25 %
19.375 %
15.0 % 18.75 %
16.875 %
12.5 % 16.25 %
14.375 %
10.0 % 13.75 %
11.875 %
7.5 %
11.25 %
9.375 %
5.0 %
8.75 %
6.875 %
0.0 %
6.25 %
0.000 %
Voltage Range (VDD=5V)
Low High Recommended
3.875 5.000
5.000
3.750 3.938
3.844
3.625 3.813
3.719
3.500 3.688
3.594
3.375 3.563
3.469
3.250 3.438
3.344
3.125 3.313
3.219
3.000 3.188
3.094
2.875 3.063
2.969
2.750 2.938
2.844
2.625 2.813
2.719
2.500 2.688
2.594
2.375 2.563
2.469
2.250 2.438
2.344
2.125 2.313
2.219
2.000 2.188
2.094
1.875 2.063
1.969
1.750 1.938
1.844
1.625 1.813
1.719
1.500 1.688
1.594
1.375 1.563
1.469
1.250 1.438
1.344
1.125 1.313
1.219
1.000 1.188
1.094
0.875 1.063
0.969
0.750 0.937
0.844
0.625 0.812
0.719
0.500 0.687
0.594
0.375 0.562
0.469
0.250 0.437
0.344
0.000 0.312
0.000
-6-
Voltage Range (VDD=3V)
Low
High
Recommended
2.325 3.000
3.000
2.250 2.363
2.306
2.175 2.288
2.231
2.100 2.213
2.156
2.025 2.138
2.081
1.950 2.063
2.006
1.875 1.988
1.931
1.800 1.913
1.856
1.725 1.838
1.781
1.650 1.763
1.706
1.575 1.688
1.631
1.500 1.613
1.556
1.425 1.538
1.481
1.350 1.463
1.406
1.275 1.388
1.331
1.200 1.313
1.256
1.125 1.238
1.181
1.050 1.163
1.106
0.975 1.088
1.031
0.900 1.013
0.956
0.825 0.937
0.881
0.750 0.862
0.806
0.675 0.787
0.731
0.600 0.712
0.656
0.525 0.637
0.581
0.450 0.562
0.506
0.375 0.487
0.431
0.300 0.412
0.356
0.225 0.337
0.281
0.150 0.262
0.206
0.000 0.187
0.000
May, 2005
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Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2.5W × 2 Class AB Audio Power Amplifier
PT2305
HEAT DISSIPATION
During normal operation, the chip only consumes very little stand-by current. In high output power
conditions, the package temperature will rise. For proper operating temperature, a modest heat sink
mounted on the top side of the chip is required. The thermal resistance requirement of the heat sink
demand may be obtained by the formula below:
θJA = (TJ(max) – TA) ÷ PDISS
PDISS = IC dissipation power
TJ (max) = Maximum chip conjunction temperature
TA = external environment temperature
θJA = thermal resistance from chip conjunction to ambience environment
With 60% estimated efficiency (eff), PT2305 in 2W + 2W output power dissipation is probably
PDISS = ( Po ÷ eff ) - Po = 2.6W
The maximum chip conjunction temperature is 150°C. Exceeding this temperature will damage the
chip, assuming the outside environment air temperature is 50°C. From the chip conjunction dissipation
to external environment thermal resistance θJA should be:
θJA = ( 150 – 50 ) ÷ 2.6 = 38.4℃/W
The PT2305 chip conjunction to case thermal resistance θJC is 26℃ /W. Therefore the heat sink
thermal resistance should be:
θJA –θJC = 12.4℃/W
In normal operating, no need extra heat sink, only utilize the ground (copper foil) of PCB to heat
dissipation.
PT2305 V1.1
-7-
May, 2005
Tel: 886-2-66296288
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Min.
Max.
Supply voltage
VDD
7
Operating temperature
Topr
-40
+85
Storage temperature
Tstg
-65
+150
Maximum input voltage
Vimax
-0.3
VDD +0.3
Maximum input current
Iimax
-10
+10
* Input pins surge current can reach 100mA does not induce the CMOS latched up.
PT2305 V1.1
-8-
Unit
V
℃
℃
V
mA
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
ELECTRICAL CHARACTERISTICS
(Unless otherwise, Vcc=5V, bandwidth=22 ~ 22KHz)
Parameter
Symbol
Conditions
Supply voltage
VDD
Vin=0V
Operating current
Is
Vshutdown=VDD
Two channels gain error
Gerr
RIN=RF=20KΩ
Po=1W, RL=8Ω
THD+N
THD
Po=340mW, RL=32Ω
THD=1%, RL=3Ω
THD=1%, RL=4Ω
THD=10%, RL=4Ω
Power output
Po
THD=1%, RL=8Ω
THD=10%, RL=8Ω
Pout=1.1W, RL=8Ω,
Signal-to-noise ratio
SNR
A-Weighted
Residual noise
Vno
A-Weighted
Output offset
Voff
Vin=0V, +OUT ~ -OUT
Channel separation
CS
F=1KHz
Power supply
CB=1.0µF, f=120Hz
PSRR
rejection ratio
VRIPPLE=200mVrms: RL= 8Ω
DC Vol=5V
F=1KHz
Volume control range
Vatt
DC Vol=0V
Volume setup step
Gstep
Vatt=0 ~ -51dB
Mute
mute
DC Vol=0V
Overheat close
TSSOP
Back to work
Temperature protect
TH
Overheat close
SOP
Back to work
Shutdown on
Shutdown voltage
VSD
Shutdown off
Mute on
Mute voltage
VMT
Mute off
PT2305 V1.1
-9-
Min.
2.7
1.0
-
Typ.
5
15
0.7
0
0.3
1
2.2
2
2.5
1.1
1.5
Max. Unit
6
V
30
mA
2.0
µA
±1
dB
%
W
-
-
93
-
dB
25
-
40
10
70
50
±50
-
µV
mV
dB
-
74
-
dB
-0.75
-75
-78
0.5
0.5
-
0
-78
0
150
105
135
105
0.6
0.2
0.6
0.2
+0.75
dB
1
dB
dB
℃
VDD
0.3
VDD
0.3
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
PACKAGE THERMAL CHARACTERISTIC
PACKAGE TYPE: TSSOP, 20PINS, 173MIL
Parameter
From chip conjunction dissipation to
external environment
From chip conjunction dissipation to
package surface
Symbol
θJA
Condition
Ta=45℃
θJC
Value
Unit
68.66
℃/W
22.94
℃/W
Value
Unit
45.44
℃/W
27.00
℃/W
PACKAGE TYPE: SOP, 20PINS, 300MIL
Parameter
From chip conjunction dissipation to
external environment
From chip conjunction dissipation to
package surface
PT2305 V1.1
Symbol
θJA
θJC
- 10 -
Condition
Ta=45℃
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
TYPICAL PERFORMANCE CHARACTERISTICS
PT2305 V1.1
THD+N vs Output Power
THD+N vs Output Power
THD+N vs Output Power
THD+N vs Output Power
THD+N vs Output Power
THD+N vs Output Power
- 11 -
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2.5W × 2 Class AB Audio Power Amplifier
PT2305 V1.1
PT2305
THD+N vs Output Power
THD+N vs Frequency
THD+N vs Frequency
THD+N vs Frequency
THD+N vs Frequency
THD+N vs Frequency
- 12 -
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
THD+N vs Output Power
THD+N vs Frequency
Output Power vs Load Resistance
Output Power vs Load Resistance
Power Supply Rejection Ratio
Dropout Voltage
PT2305 V1.1
- 13 -
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2.5W × 2 Class AB Audio Power Amplifier
Volume Control Characteristics
PT2305
Power Dissipation vs Output Power
2.25
2
1.75
1.5
1.25
1
0.75
0.5
0.25
0
2.5
Frequency(Hz)
3
3.5
4
4.5
5
5.5
SUPPLY VOLTAGE(V)
Crosstalk
Output Power vs Supply Voltage
15
12.5
10
7.5
5
2.5
0
2.5
3
3.5
4
4.5
5
5.5
SUPPLY VOLTAGE(V)
Supply Current vs Supply Voltage
PT2305 V1.1
Power Dissipation vs Output Power
- 14 -
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
APPLICATION CIRCUIT
5V
+
10 µ F
CH 1
0.1 µ F
10 4
DC Volu me
C ontr ol
1
Bypass
GND
20
2
GND
GND
19
3
-Out 1
-OUT 2
18
4
VD D
VD D
17
5
+Out 1
+Out 2
16
6
GND
GND
15
7
Shutdown
Vo 2
14
8
Mute
Vin 2
13
9
VD D
Vin 1
12
10
DC_Vol
Vo 1
11
P T 23 0 5
20 K
C H 2 -i n
20 K
33 4
33 4
20 K
+
1µ F
PT2305 V1.1
CH 2
C H 1 -i n
20 K
- 15 -
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
ORDER INFORMATION
Valid Part Number
PT2305
PT2305-HT
PT2305-S
PT2305-D
PT2305 V1.1
Package Type
20 Pins, TSSOP, 173mil
20 Pins, HTSSOP, 173mil
20 Pins, SOP, 300mil
20 Pins, DIP, 300mil
- 16 -
Top Code
PT2305
PT2305-HT
PT2305-S
PT2305-D
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
PACKAGE INFORAMTION
20PINS, TSSOP, 173MIL
PT2305 V1.1
- 17 -
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2.5W × 2 Class AB Audio Power Amplifier
Symbols
A
A1
A2
b
b1
c
c1
D
E
E1
e
L
L1
R
R1
S
θ1
θ2
θ3
PT2305 V1.1
Min.
0.05
0.80
0.19
0.19
0.09
0.09
6.40
Nom.
1.00
0.22
6.50
6.40 BSC.
4.40
0.65 BSC.
0.60
1.00 REF.
12 REF.
12 REF.
4.30
0.45
0.09
0.09
0.20
0°
- 18 -
PT2305
Max.
1.20
0.15
1.05
0.30
0.25
0.20
0.16
6.60
4.50
0.75
8°
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
Notes:
1. Dimensioning and tolerancing per ASME Y14.5M-1994.
2. Controlling Dimension: Millimeters
3. Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate
burrs shall not exceed 0.15 per end.
4. Dimension E1 does not include interlead flash or protrusion. Interlead flash or protrusion shall not
exceed 0.25 per side.
5. Dimension b does not include dambar protrusion. Allowable dambar protrusion shall be 0.08 mm
total in excess of the b dimension at maximum material condition. Dambar cannot be located on the
lower radius or the foot. Minimum space between protrusion and adjacent lead is 0.07 mm.
6. N is the maximum number of terminal positions for the specified package length. Depopulation is
allowed, but only under the following conditions:
- Depopulation may reduce N by increments of four leads only.
- Only end leads may be removed.
- Leads must be symmetrically arranged with respect to datum A (Note 10) to avoid any array
shifting.
7. Terminal numbers are shown for reference only.
8. Datum A and B to be determined at datum plane H.
9. Dimensions D and E1 to be determined at datum plane H.
10. This dimension applies only to variations with an even number of leads per side. For variations with
an odd number of leads per side, the center lead must be coincident with the package centerline,
datum A.
11. Cross section B-B to be determined at 0.10 to 0.25 mm from the lead tip.
12. Details of the pin 1 identifier are optional, but must be located within the zone indicated.
13. D1 and E2 minimum dimensions of thermally enhanced types are variables depending on device
function (die paddle size). D1 and E2 maximum dimensions can be equal to D/E1 maximum
dimensions. End user should verify actual size of exposed thermal pad for specific device
application.
14. A1 is defined as the vertical distance from the seating plane to the lowest point on the package
body excluding the lid and or thermal enhancement on cavity down package configurations.
15. Caution should be taken during design, assembly and processing to prevent deposited board
solder from holding the leads up off the board. This is applicable to thermal enhanced variations
where A1 dimension is allowed to be zero.
16. Refer to JEDEC MO-153 Variation AC
JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION
PT2305 V1.1
- 19 -
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2.5W × 2 Class AB Audio Power Amplifier
PT2305
20 PINS, HTSSOP, 173MIL
PT2305 V1.1
- 20 -
May, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2.5W × 2 Class AB Audio Power Amplifier
PT2305
PT2305 V1.1
May, 2005
- 21 -
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2.5W × 2 Class AB Audio Power Amplifier
Symbols
A
A1
A2
b
b1
c
c1
D
D1
E
E1
E2
e
L
L1
R
R1
S
θ1
θ2
θ3
PT2305 V1.1
Min.
0.05
0.80
0.19
0.19
0.09
0.09
6.40
2.20
Nom.
1.00
0.22
6.50
6.40 BSC.
4.40
0.65 BSC.
0.60
1.00 REF.
12 REF.
12 REF.
4.30
1.50
0.45
0.09
0.09
0.20
0°
- 22 -
PT2305
Max.
1.20
0.15
1.05
0.30
0.25
0.20
0.16
6.60
4.50
0.75
8°
May, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2.5W × 2 Class AB Audio Power Amplifier
PT2305
Notes:
1. Dimensioning and tolerancing per ASME Y14.5M-1994.
2. Controlling Dimension: Millimeters
3. Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate
burrs shall not exceed 0.15 per end.
4. Dimension E1 does not include interlead flash or protrusion. Interlead flash or protrusion shall not
exceed 0.25 per side.
5. Dimension b does not include dambar protrusion. Allowable dambar protrusion shall be 0.08 mm
total in excess of the b dimension at maximum material condition. Dambar cannot be located on the
lower radius or the foot. Minimum space between protrusion and adjacent lead is 0.07 mm.
6. N is the maximum number of terminal positions for the specified package length. Depopulation is
allowed, but only under the following conditions:
- Depopulation may reduce N by increments of four leads only.
- Only end leads may be removed.
- Leads must be symmetrically arranged with respect to datum A (Note 10) to avoid any array
shifting.
7. Terminal numbers are shown for reference only.
8. Datum A and B to be determined at datum plane H.
9. Dimensions D and E1 to be determined at datum plane H.
10. This dimension applies only to variations with an even number of leads per side. For variations with
an odd number of leads per side, the center lead must be coincident with the package centerline,
datum A.
11. Cross section B-B to be determined at 0.10 to 0.25 mm from the lead tip.
12. Details of the pin 1 identifier are optional, but must be located within the zone indicated.
13. D1 and E2 minimum dimensions of thermally enhanced types are variables depending on device
function (die paddle size). D1 and E2 maximum dimensions can be equal to D/E1 maximum
dimensions. End user should verify actual size of exposed thermal pad for specific device
application.
14. A1 is defined as the vertical distance from the seating plane to the lowest point on the package
body excluding the lid and or thermal enhancement on cavity down package configurations.
15. Caution should be taken during design, assembly and processing to prevent deposited board
solder from holding the leads up off the board. This is applicable to thermal enhanced variations
where A1 dimension is allowed to be zero.
16. Refer to JEDEC MO-153 Variation ACT
JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION
PT2305 V1.1
- 23 -
May, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2.5W × 2 Class AB Audio Power Amplifier
PT2305
20 PINS, SOP, 300MIL
Symbol
A
A1
B
C
D
E
e
H
h
L
α
PT2305 V1.1
Min.
2.35
0.10
0.33
0.23
12.60
7.40
Nom.
Max.
2.65
0.30
0.51
0.32
13.00
7.60
1.27 bsc.
10.00
0.25
0.40
0°
10.65
0.75
1.27
8°
- 24 -
May, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2.5W × 2 Class AB Audio Power Amplifier
PT2305
Notes:
1. Dimensioning and tolerancing per ANSI Y14.5M-1982.
2. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold Flash, protrusion or gate
burrs shall not exceed 0.15 mm (0.006 in) per side.
3. Dimension “E” does not include interlead flash or protrusions. Interlead flash or protrusions shall not
exceed 0.25 mm (0.010 in) per side.
4. The chamfer on the body is optional. It is not present, a visual index feature must be located within
the crosshatched area.
5. “L” is the length of the terminal for soldering to a substrate.
6. N is the number of the terminal positions (N=20)
7. The lead width “B” as measured 0.36 mm (0.014 in) or greater above the seating plane, shall not
exceed a maximum value of 0.61 mm (0.24 in).
8. Controlling dimension: MILLIMETER.
9. Refer to JEDEC MS-013, Variation AC.
JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2305 V1.1
- 25 -
May, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2.5W × 2 Class AB Audio Power Amplifier
PT2305
20PINS, DIP, 300 MIL
PT2305 V1.1
- 26 -
May, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
2.5W × 2 Class AB Audio Power Amplifier
Symbol
A
A1
A2
b
b1
b2
b3
c
c1
D
D1
E
E1
e
eA
eB
eC
L
Min.
0.015
0.115
0.014
0.014
0.045
0.030
0.008
0.008
0.980
0.005
0.300
0.240
0.000
0.115
PT2305
Nom.
0.130
0.018
0.018
0.060
0.039
0.010
0.010
1.030
0.310
0.250
0.100 bsc.
0.300 bsc.
0.130
Max.
0.210
0.195
0.022
0.020
0.070
0.045
0.014
0.011
1.060
0.325
0.280
0.430
0.060
0.150
Notes:
1. All dimensions are in INCHES.
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension ”A”，”A1” and ”L” are measured with the package seated in JEDEC Seating Plane
Gauge GS-3
4. “D”，”D1” and “E1” dimensions do not include mold flash or protrusions. Mold flash or protrusions
shall not exceed 0.010 inch.
5. “E” and “eA” measured with the leads constrained to be perpendicular to datum -c- .
6. “eB” and “eC” are measured at the lead tips with the leads unconstrained.
7. N is the number of the terminal positions (N=20)
8. Pointed or rounded lead tips are preferred to ease insertion.
9. “b2” and “b3” maximum dimensions are not include dambar protrusions. Dambar protrusions shall
not exceed 0.010 inch (0.25mm)
10. Distance between leads including dambar protrusions to be 0.005 inch minimum.
11. Datum plane -H- coincident with the bottom of lead, where lead exits body.
12. Refer to JEDEC MS-001, Variation AD.
JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2305 V1.1
- 27 -
May, 2005