TPF632C 3PEAK | Alldatasheet
Document overview
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Technical content
Features
3-VRMS Output into 2.5kΩ Load with 5V Supply 2-VRMS Output into 2.5kΩ Load with 3.3V Supply Integrated Charge Pump Generates Negative Supply Rail SNR Enhanced PVDD Power Off Delay Function Low THD+N: 0.001% Drives 600Ω Load Stable with 220pF Capacitive Load Pop-Free Under-Voltage Protection (TPF632C/605C) Pop-Free Enable Control –40°C to 85°C Operation Range Robust 8kV (Output-Pin) HBM ESD Rating On All Pins Robust 2kV CDM ESD Rating Green, Popular Type Package
Applications
Set-Top Box Blue-ray and HD DVD Players PDP TV and LCD TV
Description
The 3PEAK TPF632C/605C/607C are 3-VRMS pop- free stereo line drivers with the integrated charge pump generating the negative supply rail which allows the removal of the output DC-blocking capacitors. The devices are capable of driving 3- VRMS into a 2.5-kΩ load with single 5V supply voltage. The TPF632C has differential inputs, the TPF605C/607C support single-ended inputs, and all can use external resistors for flexible gain setting. The 3PEAK TPF632C/605C/607C has built-in enable/shutdown control for pop-free on/off control. The TPF632C/605C has an external under-voltage detector that mutes the output when monitored voltage drop below set value. Using the TPF632C/605C/607C in audio products can reduce component count considerably compared to traditional methods of generating a 3-VRMS output. The device needs only a single 5V supply to generate 8.5-VPP output while traditional op-amp requires a split-rail power supply to achieve same. The device is ideal for single-supply electronics where size and cost are critical design parameters. 3PEAK and the 3PEAK logo are registered trademarks of 3PEAK INCORPORATED. All other trademarks are the property of their respective owners. DACDACTPF632CLEFTRIGHTFigure 1. Typical Application Circuit of TPF632C Pin Configuration (Top View) Audio Line Drivers Part Number Package Remarks TPF632C TSSOP-14 5V/3.3V,Differential inputs TPF605C MSOP-10-EP 5V/3.3V, Single-ended inputs TPF607C MSOP-10 Single-ended inputs, no UVP control TPF632C14-Pin TSSOP1413121110986573214+INROUTR-INR+INLOUTL-INLCNENPVSSCPPGNDPVDDUVPGNDUVPCharge PumpTPF605C10-Pin MSOP-EPTPF607C10-Pin MSOP10987653214OUTR-INROUTL-INLCNENPVSSCPPVDDUVPUVPCharge PumpGND10987653214OUTR-INROUTL-INLCNENPVSSCPPVDDGNDCharge Pump
TPF632C / TPF605C / TPF607C 3-VRMS Audio Line Driver with Integrated Charge Pump Order Information Model Name Order Number Package Transport Media, Quantity Marking Information TPF632C TPF632C-TR 14-Pin TSSOP Tape and Reel, 3000 TPF632C TPF605C TPF605C-VR 10-Pin MSOP-EP Tape and Reel, 3000 TPF605C TPF607C TPF607C-VR 10-Pin MSOP Tape and Reel, 3000 TPF607C Absolute Maximum Ratings Note 1 Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The inputs are protected by ESD protection diodes to each power supply. If the input extends more than 500mV beyond the power supply, the input current should be limited to less than 10mA. Note 3: A heat sink may be required to keep the junction temperature below the absolute maximum. This depends on the power supply voltage and how many amplifiers are shorted. Thermal resistance varies with the amount of PC board metal connected to the package. The specified values are for short traces connected to the leads. ESD, Electrostatic Discharge Protection Pin Symbol Parameter Condition Minimum Level Unit All HBM Human Body Model ESD MIL-STD-883H Method 3015.8 8 kV All CDM Charged Device Model ESD JEDEC-EIA/JESD22-C101E 2 kV Thermal Resistance Package Type θJA θJC Unit 14-Pin TSSOP 130 49 °C/W 10-Pin MSOP 120 45 °C/W 10-Pin MSOP-EP 70 10 °C/W
TPF632C / TPF605C / TPF607C 3-VRMS Audio Line Driver with Integrated Charge Pump Specifications are at TA = 27°C. VDD = 5V, RL = 2.5kΩ, CPUMP=CPVSS=1F, CIN =10F, RIN = 10kΩ, RFB = 20kΩ, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VDD Supply Voltage Range 2.7 5.5 V VOS Output Offset Voltage Input grounded, unity gain. -4 4 mV IQ Quiescent Current No load 4.6 mA IQ(off) Supply Current in Shutdown 0.2 mA VO Output Voltage VDD=3.3V, f=1kHz, THD=1% 2.05 V RMS VDD=5V, f=1kHz, THD=1% 3.05 V RMS THD+N Total Harmonic Distortion Plus Noise VO=3VRMS, f=1kHz 0.001 % VENH High-level Threshold Voltage(EN) VDD=3.3V, EN Low to High Transition 1 V VDD=5V, EN Low to High Transition 1 V VENL Low-level Threshold voltage(EN) VDD=3.3V, EN High to Low Transition 0.5 V VDD=5V, EN Low to High Transition 0.6 V |IENH| High-level input current(EN) V DD = 5 V, VI = VDD 0.1 μA |IENL| Low-level input current(EN) V DD = 5 V, VI = 0 V 1 μA XTALK Crosstalk V O=3VRMS, f=1kHz -110 dB ISC Short Circuit Current V DD=5V 20 mA RIN Input Resistor Range 1 10 47 k SR Slew Rate 5 V/μs CL Maximum Capacitive Load 220 pF CF Flying Capacitor 0.1 0.33 2.2 μF VN Noise Output Voltage BW=20Hz to 20kHz 4.3 μV RMS SNR Signal to Noise Ratio V O=3VRMS, f=1kHz, BW=20kHz 117 dB GBW Unity Gain Bandwidth No load 10 MHz AVOL Open-Loop Voltage Gain No load 130 dB VUVP External Under-voltage Detection VDD=3.3V 1.18 1.23 1.28 V VDD=5V 1.23 1.27 1.30 V IHYS External Under-voltage Detection Hysteresis Current 4.7 μA fCP Charge Pump Frequency 330 kHz
TPF632C / TPF605C / TPF607C 3-VRMS Audio Line Driver with Integrated Charge Pump Typical Performance Characteristics Total Harmonic Distortion + Noise vs. Output Voltage Total Harmonic Distortion + Noise vs. Output Voltage Total Harmonic Distortion + Noise vs. Output Voltage Total Harmonic Distortion + Noise vs. Output Voltage Total Harmonic Distortion + Noise vs. Frequency Total Harmonic Distortion + Noise vs. Frequency 0.00010.0010.010.110 100 1k 10k 100kFrequency (Hz)THD+N (%)VDD=5VRL=100kΩVo=2Vrms
TPF632C / TPF605C / TPF607C 3-VRMS Audio Line Driver with Integrated Charge Pump Pin Functions PIN I/O Description Name Number +INR 1 I Positive input of the right channel OPAMP -INR 2/1 I Negative input of the right channel OPAMP OUTR 3/2 O Output of the right channel OPAMP GND 4/EP/8 P Ground EN 5/3 I Enable PVSS 6/4 P Negative supply generated with integrated charge pump CN 7/5 I/O Negative terminal of the flying capacitor of the charge CP 8/6 I/O Positive terminal of the flying capacitor of the charge PVDD 9/7 P Positive supply PGND 10 P Ground for charge pump UVP 11/8 I Under-voltage protection input OUTL 12/9 O Output of the left channel OPAMP -INL 13/10 I Negative input of the left channel OPAMP +INR 14 I Positive input of the left channel OPAMP Applications Information Typical Application Circuit VOUTRCIN-VINRRINRFBCharge PumpUVPCIN-VINLRINVOUTLCN CPPVDDPVSSPGNDENUVPGNDRFB1μF0.33μF1μF Figure 2 Typical Application Circuit of TPF632C
TPF632C / TPF605C / TPF607C 3-VRMS Audio Line Driver with Integrated Charge Pump AC-Coupling Input Capacitors Because of the integrated charge pump that generates negative rail, TP632C/605C/607C may be used to amplify audio signal so the output DC voltage is 0V. This usually requires the DC voltage of the input signal to be 0V. If the input signal has a DC level other than 0V, an AC-coupling capacitor is necessary to block the DC voltage. The AC-coupling capacitor essentially forms a high-pass filter at the input. The cut-off frequency of the filter has to be low enough not to distort the input audio signal. For an inverting amplifier shown in Figure 4 the cut-off frequency may be calculated as following: (1) If the required maximum cut-off frequency is known, the minimum AC-coupling capacitance can be determined: (2) Adding Low-Pass Filtering to the Gain If low-pass filtering is necessary in addition to the audio signal amplification, a second-order filter can be implemented as shown in Figure 5. Choice of C3, R1, R2, and R3 is based on the gain setting requirement and AC-coupling cut-off frequency as discussed above. C1, C2 and C4 may be calculated depending on the bandwidth. Example choices of R and C are listed in Table 1. If first-order filtering satisfies performance requirements, simply remove the C2 and C4 to lower the component counts. -VIN (a) (b) -VIN +VIN R1 R2 C1R1 R2 C1R1 R2 Figure 5 Second-order filter with gain: (a) Single-ended input; (b) Differential input Table 1 Example RC setting at different gains Gain R1 R2 R3 C1 C2 C3 C4 G=2 2.5k 2.5k 10k 120pF 1nF 2.2uF 360pF G=2.5 2.4k 2.4k 12k 91pF 750pF 2.2uF 390pF G=3.75 2k 2k 15k 75pF 750pF 4.7uF 390pF Pop-Free Power Up and Power Down During power up or power down, the input device that provide audio source may experience significant DC level shift. Charging of the input capacitor due to DC shift will cause pop noise. It is recommended that TPF632C/605C/607C is disabled (EN low) during power up and power down and kept disabled until charging of the input capacitor is complete. The sequence of EN control is illustrated below. 1=2c IN IN f R C 2IN IN c C R f
TPF632C / TPF605C / TPF607C 3-VRMS Audio Line Driver with Integrated Charge Pump Vin VoutCloadRisoTPF632C Figure 8 Driving Circuits Power Supply Layout and Bypass The power supply pin of TPF632C/605C/607C should have a local bypass capacitor (i.e., 0.01μF to 0.1μF) within 2mm for good high frequency performance. It can also use a bulk capacitor (i.e., 1μF or larger) within 100mm to provide large, slow currents. This bulk capacitor can be shared with other analog parts. Ground layout improves performance by decreasing the amount of stray capacitance and noise at the OPA’s inputs and outputs. To decrease stray capacitance, minimize PC board lengths and resistor leads, and place external components as close to the op amps’ pins as possible. Proper Board Layout To ensure optimum performance at the PCB level, care must be taken in the design of the board layout. To avoid leakage currents, the surface of the board should be kept clean and free of moisture. Coating the surface creates a barrier to moisture accumulation and helps reduce parasitic resistance on the board. Keeping supply traces short and properly bypassing the power supplies minimizes power supply disturbances due to output current variation, such as when driving an ac signal into a heavy load. Bypass capacitors should be connected as closely as possible to the device supply pins. Stray capacitances are a concern at the outputs and the inputs of the amplifier. It is recommended that signal traces be kept at least 5mm from supply lines to minimize coupling. A variation in temperature across the PCB can cause a mismatch in the Seebeck voltages at solder joints and other points where dissimilar metals are in contact, resulting in thermal voltage errors. To minimize these thermocouple effects, orient resistors so heat sources warm both ends equally. Input signal paths should contain matching numbers and types of components, where possible to match the number and type of thermocouple junctions. For example, dummy components such as zero value resistors can be used to match real resistors in the opposite input path. Matching components should be located in close proximity and should be oriented in the same manner. Ensure leads are of equal length so that thermal conduction is in equilibrium. Keep heat sources on the PCB as far away from amplifier input circuitry as is practical. The use of a ground plane is highly recommended. A ground plane reduces EMI noise and also helps to maintain a constant temperature across the circuit board.
TPF632C / TPF605C / TPF607C 3-VRMS Audio Line Driver with Integrated Charge Pump Package Outline Dimensions TSSOP-14 Symbol Dimensions In Millimeters MIN TYP MAX A - - 1.20 A1 0.05 - 0.15 A2 0.90 1.00 1.05 b 0.20 - 0.28 c 0.10 - 0.19 D 4.86 4.96 5.06 E 6.20 6.40 6.60 E1 4.30 4.40 4.50 e 0.65 BSC L 0.45 0.60 0.75 L1 1.00 REF L2 0.25 BSC R 0.09 - - θ 0° - 8° E e A2A D L1 L2L RR1 θ c
TPF632C / TPF605C / TPF607C 3-VRMS Audio Line Driver with Integrated Charge Pump Package Outline Dimensions MSOP-10-EP (EXPOSED PAD) Symbol Dimensions In Millimeters MIN TYP MAX A - - 1.10 A1 0.05 - 0.15 A2 0.75 0.85 0.95 b 0.19 - 0.28 c 0.08 0.15 0.23 D 2.90 3.00 3.10 D1 1.80REF E1 2.90 3.30 3.10 E2 1.55REF e 0.50BSC L 0.40 - 0.70 L1 0.95BSC θ 0° - 8° aaa 0.2 bbb 0.25 ccc 0.10 ddd 0.08
TPF632C / TPF605C / TPF607C 3-VRMS Audio Line Driver with Integrated Charge Pump Package Outline Dimensions MSOP-10 (NO EXPOSED PAD) Symbol Dimensions In Millimeters MIN TYP MAX A - - 1.10 A1 0.05 - 0.15 A2 0.75 0.85 0.95 b 0.19 - 0.28 c 0.08 0.15 0.23 D 2.90 3.00 3.10 D1 1.80REF E1 2.90 3.30 3.10 E2 1.55REF e 0.50BSC L 0.40 - 0.70 L1 0.95BSC θ 0° - 8° aaa 0.2 bbb 0.25 ccc 0.10 ddd 0.08