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 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 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 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 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 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 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 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 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 Tel: 886-2-66296288 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 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 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 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 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 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 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℃ 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 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 - 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 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 - 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 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 - May, 2005 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 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 - 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 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 - 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 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 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 PACKAGE INFORAMTION 20PINS, TSSOP, 173MIL PT2305 V1.1 - 17 - May, 2005 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 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° 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 AC JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION PT2305 V1.1 - 19 - 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, 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