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Headphone Driver IC
PT2309
DESCRIPTION
The PT2309 is a headphone driver IC, it can working on wide supply range. Utilizing CMOS Technology, it has very low power consumption is in stand-by mode. Total harmonic distortion is lower than 0.03% (32 load) and the also has low noise output. Built-in mute function can prevents popping sounds happen when power is turned ON or OFF. It is also has built-in over-temperature protection, minimum package size for space saving and suitable for small or portable products.
FEATURES
* * * * * * * CMOS Technology Stereo Input Drive 32 impedance load Low noise, Low distortion Suppress the pop and click noise when mode changed Built-in mute function Available in 8 Pins, DIP or SOP Package
APPLICATIONS
* * * * Portable VCD/DVD CD-ROM PDA Sound Card
PT2309 V1.2
-1-
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
PT2309
BLOCK DIAGRAM
4 GND A1 3 2 1
BIAS
MUTE
A2 VDD 5 6 7 8
PT2309 V1.2
-2-
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
PT2309
PIN CONFIGURATION
OUT1 MUTE IN1 GND 1 2 8 7 VDD OUT2 BIAS IN2
PT2309
3 4 6 5
PIN DESCRIPTION
Pin Name OUT1 MUTE IN1 GND IN2 BIAS OUT2 VDD I/O O I I I I O Description CH1 Output Mute Pin CH1 Input Ground CH2 Input Bias Pin CH2 Output Power Input Pin No. 1 2 3 4 5 6 7 8
PT2309 V1.2
-3-
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
PT2309
FUNCTION DESCRIPTION
POWER SUPPLY
The operating voltage of PT2309 is from 3V to 5V, In general operation 5V is recommended. It should connect a modest bias capacitor nearby the power source terminal. It can improve IC stability and decrease the noise output. Suggestion value of capacitor is from 0.1F to 10F.
POP AND CLICK SUPPRESS
For normal operation, the Input/Output port of a power amplifier powered by a single supply voltage must have a stable DC bias. Each time turn on the Vcc the input/output pins will present 1/2 Vcc DC bias voltage. For blocking the DC bias flowing to another circuit, each input/output port should have a DC blocking capacitor, it will charge/discharge when power on or off, the capacitance is relative with the pop noise. In general condition to prevent the pop noise, the time constant of bypass cap (CB) on the bypass pin will be set to maximum. Higher CB value will extend the stable time, and also can suppress the noise heard when power-on. In supply voltage=5V and CB=10F, stable time is approx 1s. 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.
INPUT CAPACITOR
Input capacitor decide the bandwidth and charge time constant, due to there is a 50K impedance, so input terminal charge period constant is: Tin= (2 x 50K x Cin) If Cin=1F, Tin=0.3s, Low frequency lower limit is 3Hz. This capacitor can use a non-polarity SMD capacitor
OUTPUT CAPACITOR
The headphone driver is designed to drive 32 headphone load, it needs a larger capacitance to extending the lower frequency cut off point. If driving a small headphone a 100F capacitor is a good choice and the low frequency limit is around 50Hz; for better low frequency performance a 220F capacitor is recommended and it's low frequency can extend to 22Hz. Due to charge/discharge time constant is shorter than CB stable time, so it will not have pop and click noise.
PT2309 V1.2
-4-
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
PT2309
MUTE
When the mute pin is connected to the GND, all of outputs signal will be muted immediately. Connecting the external R/C components on here could prevent the power-on "POP" noises, the mute function also can be active by the external DC voltage. Due to the built-in pull down resistor (150K), a larger value series resistor connecting to the mute pin may causes mute malfunction because of mute voltage divided by the resistor network. For the detailed connection description please refer to the application circuit. The attenuation of mute is relation with CB, we suggest CB must be higher then 10F, the recommend value is 47F. Higher CB will have better mute characteristic.
PT2309 V1.2
-5-
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
PT2309
ABSOLUTE MAXIMUM RATINGS
Parameter Supply Voltage Operating Temperature Storage Temperature Symbol VDD Topr Tstg Condition Min. 0 -40 -65 Max. 7 +85 +150 Unit V
Maximum Input Voltage Vimax -0.3 Vcc+0.3 V Maximum Input Current Iimax * -10 +10 mA Note: * Input pins surge current can reach 100mA does not induce the CMOS latched up.
ELECTRICAL CHARACTERISTICS
Unless otherwise, Vcc=5VCB=47Fbandwidth=22~22KHz Parameter Symbol Conditions Supply Voltage VDD Normal Mode Operating Current Is Mute Mode Voltage Gain Vg Two Channels Gain Vgerr Error Vin = 1VrmsRL = 32 THD+N THD Vin = 1VrmsRL = 5.1K Power Output Signal-to-Noise Ratio Channel Separation Power Supply Rejection Ratio Mute Mute Voltage Po SNR CS PSRR mute Vmute THD=0.1%RL=32 THD=0.1%RL=16 Input=GNDA-Weighted F=1KHz F=100~20KHz Vr=100mVrmsF=100Hz MUTE=GNDF=1KHz VIH, MUTE= OFF VIL, MUTE= ON Min. 3 6 4.5 -1 -0.5 0.01 0.003 35 65 102 90 80 45 60 1 0.8 Typ. 5 7.5 6 0 0 0.03 0.005 45 75 105 100 90 55 75 1.1 0.9 Max. 6 9 7.5 +1 +0.5 0.06 0.01 55 85 110 105 95 65 80 1.4 1 % mW dB dB dB dB Vcc Unit V mA mA dB
PT2309 V1.2
-6-
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
PT2309
APPLICATION CIRCUIT
2 1 3 Headphone Jack
+
100 F + 100 F + 10 F +5V
1 OUT1
100K Mute + 1F
VDD 8 OUT2 7 BIAS 6 IN2 5
1F
2 MUTE 3 IN1 4 GND
1F
PT2309
+ 47 F
Audio IN1
Audio IN2
PT2309 V1.2
-7-
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
PT2309
ORDER INFORMATION
Valid Part Number PT2309-D PT2309-S PT2309-D (L) PT2309-S (L) Package Type 8-Pin, DIP, 300mil 8-Pin, SOP, 150mil 8-Pin, DIP, 300mil 8-Pin, SOP, 150mil Top Code PT2309-D PT2309-S PT2309-D PT2309-S
Notes: 1. (L), (C) or (S) = Lead Free. 2. The Lead Free mark is put in front of the date code.
PT2309 V1.2
-8-
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
PT2309
PACKAGE INFORMATION
8 PINS, DIP, 300MIL
PT2309 V1.2
-9-
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
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 0.355 0.005 0.300 0.240 0.000 0.115 Nom. 0.130 0.018 0.018 0.060 0.039 0.010 0.010 0.365 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 0.400 0.325 0.280 0.430 0.060 0.150
PT2309
Note: 1. Controlling Dimensions: INCHES. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Symbols are defined in the "MO Series Symbol LIST" in Section 2.2 of Publication No.95. 4. Dimension A, A1 and L are measured with the package seated in JEDEC Seating Plane Gauge GS-3. 5. D, D1 and E1 dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.010 inch. 6. E and eA measured with the leads constrained to be perpendicular to data -c- . 7. eB and eC are measured at the lead tips with the leads unconstrained. 8. N is the number of leads (N=8) 9. Pointed or rounded lead tips are preferred to ease insertion. 10. b2 and b3 maximum dimensions do not include dambar protrusions. Dambar protrusions shall not exceed 0.010 inch (0.25mm) 11. Variation BA has a b3 dimension and is 1/2 lead package. 12. Distance between the leads including dambar protrusions to be 0.005 inch minimum. 13. Datum plane -H- coincident with the bottom of lead, where lead exits the body. 14. Refer to JEDEC MS-001, Variation BA. JEDEC is the registered trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2309 V1.2
- 10 -
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
PT2309
8 PINS, SOP, 150 MIL
PT2309 V1.2
- 11 -
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
PT2309
PT2309 V1.2
- 12 -
August, 2006
Tel:886-2-66296288 Fax:886-2-29174598 URL:http://www.princeton.com.tw
Headphone Driver IC
Symbol A A1 A2 b b1 c c1 D E E1 e L L1 L2 R R1 h 1 2 Min. 1.35 0.10 1.25 0.31 0.28 0.17 0.17 Typ. 4.90 BSC. 6.00 BSC. 3.90 BSC. 1.27 BSC. 1.04 REF. 0.25 BSC. Max. 1.75 0.25 1.65 0.51 0.48 0.25 0.23
PT2309
0.40 0.07 0.07 0.25 0 5 0
1.27 0.50 8 15 -
Note: 1. Dimensioning and tolerancing per ANSI Y 14.5M-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 mm (0.006 in) per end. Dimension E1 does not include interlead flash or protrusion. Interlead flash or protrusion shall not exceed 0.25mm per side. D and E1 dimensions are determined at datum H. 4. The package top may be smaller than the package bottom. Dimensions D and E1 are determined at the outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and interlead flash, but including any mismatch between the top and bottom of the plastic body. 5. Datums A & B to be determined at datum H. 6. N is the number of terminal positions. (N=8) 7. The dimensions apply to the flat section of the lead between 0.10 to 0.25mm from the lead tip. 8. Dimension "b" does not include dambar protrusion. Allowable dambar protrusion shall be 0.10mm total in excess of the "b" dimension at maximum material condition. The dambar cannot be located on the lower radius of the foot. 9. This chamfer feature is optional. If it is not present, then a pin 1 identifier must be located within the index area indicated. 10. Refer to JEDEC MS-012, Variation AA. JEDEC is the registered trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2309 V1.2 - 13 August, 2006

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