NCP2809A

NCP2809 Series NOCAPt 135 mW Stereo Headphone Power Amplifier The NCP2809 is a cost−effective stereo audio power amplifier capable of delivering 135 mW of continuous average power per channel into 16 W loads. The NCP2809 audio power amplifier is specifically designed to provide high quality output power from low supply voltage, requiring very few external components. Since NCP2809 does not require bootstrap capacitors or snubber networks, it is optimally suited for low−power portable systems. NCP2809A has an internal gain of 0 dB while specific external gain can externally be set with NCP2809B. If the application allows it, the virtual ground provided by the device can be connected to the middle point of the headset (Figure 1). In such case, the two external heavy coupling capacitors typically used can be removed. Otherwise, you can also use both outputs in single ended mode with external coupling capacitors (Figure 43). Due to its excellent Power Supply Rejection Ratio (PSRR), it can be directly connected to the battery, saving the use of an LDO. Features http://onsemi.com MARKING DIAGRAM 10 1 Micro10 DM SUFFIX CASE 846B MAx AYW • • • • • • • • • • • • • X = E for NCP2809A X = C for NCP2809B A = Assembly Location Y = Year W = Work Week Pb−Free Package is Available 135 mW to a 16 W Load from a 5.0 V Power Supply Excellent PSRR (85 dB Typical): Direct Connection to the Battery “Pop and Click” Noise Protection Circuit Ultra Low Current Shutdown Mode 2.2 V–5.5 V Operation Outstanding Total Harmonics Distortion + Noise (THD+N): Less than 0.01% External Turn−on and Turn−off Configuration Capability Thermal Overload Protection Circuitry PIN CONNECTIONS IN_R SD BYP REF_I IN_L 1 2 3 4 5 10 9 8 7 6 OUT_R VM OUT_I VP OUT_L Typical Applications Cellular Phone Portable Stereo MP3 Player Personal and Notebook Computers ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 20 of this data sheet. © Semiconductor Components Industries, LLC, 2004 1 November, 2004 − Rev. 7 Publication Order Number: NCP2809/D NCP2809 Series VP 1 mF CS VP AUDIO INPUT CI 390 nF BYPASS Cbypass AUDIO INPUT 1 mF CI 390 nF VIH VIL SHUTDOWN VM IN_R 20 kW 20 kW SHUTDOWN CONTROL + − IN_L VP 20 kW BYPASS VMC BRIDGE 20 kW − + + − OUT_L HEADPHONE JACK LEFT OUT_I SLEEVE REF_I RIGHT OUT_R Figure 1. NCP2809A Typical Application Schematic without Output Coupling Capacitor (NOCAP Configuration) VP 1 mF CS VP AUDIO INPUT CI 390 nF IN_L 20 kW VP BYPASS 1 mF CI 390 nF BYPASS VMC BRIDGE 20 kW − + + − OUT_L 220 mF + Cout OUT_I REF_I NC NC 220 mF + Cout SLEEVE RIGHT HEADPHONE JACK LEFT AUDIO INPUT IN_R 20 kW + − 20 kW OUT_R VIH VIL SHUTDOWN VM SHUTDOWN CONTROL Figure 2. NCP2809A Typical Application Schematic with Output Coupling Capacitor TIP (LEFT) RING SLEEVE (RIGHT) Figure 3. Typical 3−Wire Headphone Plug http://onsemi.com 2 NCP2809 Series 20 kW VP 1 mF CI 390 nF BYPASS Cbypass 1 mF + − CS VP VP − + + − OUT_L HEADPHONE JACK LEFT VMC BRIDGE OUT_I SLEEVE REF_I RIGHT AUDIO INPUT CI 390 nF SHUTDOWN VM VIH VIL 20 kW SHUTDOWN CONTROL 20 kW IN_R OUT_R AUDIO INPUT 20 kW IN_L BYPASS Figure 4. NCP2809B Typical Application Schematic without Output Coupling Capacitor (NOCAP Configuration) 20 kW VP 1 mF CS VP AUDIO INPUT CI 390 nF BYPASS Cbypass 1 mF 20 kW IN_L VP BYPASS VMC BRIDGE − + + − OUT_L 220 mF + Cout OUT_I REF_I NC NC 220 mF + Cout SLEEVE RIGHT HEADPHONE JACK LEFT AUDIO INPUT CI 390 nF 20 kW IN_R + − OUT_R SHUTDOWN VIH VIL VM SHUTDOWN CONTROL 20 kW Figure 5. NCP2809B Typical Application Schematic with Output Coupling Capacitor http://onsemi.com 3 NCP2809 Series PIN FUNCTION DESCRIPTION Pin 1 2 3 4 Type I I I O Symbol IN_R SHUTDOWN BYPASS REF_I Description Negative input of the second amplifier. It receives the audio input signal. Connected to the input capicator Cin (NCP2809A) or the external Rin (NCP2809B). The device enters in shutdown mode when a a low level is applied on this pin. Bypass capacitor pin which provides the common mode voltage (VP/2). Virtual ground amplifier feed back. This pin sets the stereo headset ground. In order to improve crosstalk, this pin must be connected as close as possible to the ground connection of the headset (ideally at the ground pin of the headset connector). When one uses bypassing capacitors, this pin must be left unconnected. Negative input of the first amplifier. It receives the audio input signal. Connected to the input capacitor Cin (NCP2809A) or the external Rin (NCP2809B). Stereo headset amplifier analog output left. This pin will output the amplified analog signal and, depending on the application, must be coupled with a capacitor or directly connected to the left loudspeaker of the headset. This output is able to drive a 16 W load in a single−ended configuration. Positive analog supply of the cell. Range: 2.2 V – 5.5 V Virtual ground for stereo Headset common connection. This pin is directly connected to the common connection of the headset when use of bypassing capacitor is not required. When one uses bypassing capacitors, this pin must be left unconnected. Analog Ground Stereo headset amplifier analog output right. This pin will output the amplified analog signal and, depending on the application, must be coupled with a capacitor or directly connected to the right loudspeaker of the headset. This output is able to drive a 16 W load in a single−ended configuration. 5 6 I O IN_L OUT_L 7 8 I O VP OUT_I 9 10 I O VM OUT_R MAXIMUM RATINGS (TA = +25°C) Rating Supply Voltage Operating Supply Voltage Input Voltage Max Output Current Power Dissipation Operating Ambient Temperature Max Junction Temperature Storage Temperature Range Thermal Resistance, Junction−to−Air ESD Protection Latch up current at Ta = 85_C (Note 3) Micro10 Human Body Model (HBM) (Note 1) Machine Model (MM) (Note 2) Symbol Vp Op Vp Vin Iout Pd TA TJ Tstg RqJA − Value 6.0 2.2 to 5.5 −0.3 to VCC + 0.3 250 Internally Limited −40 to +85 150 −65 to +150 200 8000 200 ±100 Unit V V V mA − °C °C °C °C/W V mA Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If stress limits are exceeded device functional operation is not implied, damage may occur and reliability may be affected. Functional operation should be restricted to the Recommended Operating Conditions. 1. Human Body Model, 100 pF discharged through a 1.5 kW resistor following specification JESD22/A114 8.0 kV can be applied on OUT_L, OUT_R, REF_I and OUT_I outputs. For other pins, 2.0 kV is the specified voltage. 2. Machine Model, 200 pF discharged through all pins following specification JESD22/A115. 3. Maximum ratings per JEDEC standard JESD78. *This device contains 752 active transistors and 1740 MOS gates. http://onsemi.com 4 NCP2809 Series ELECTRICAL CHARACTERISTICS All the parameters are given in the capless configuration (typical application). The following parameters are given for the NCP2809A and NCP2809B mounted externally with 0 dB gain, unless otherwise noted. (For typical values TA = 25°C, for min and max values TA = −40°C to 85°C, TJmax = 125°C, unless otherwise noted.) Characteristic Supply Quiescent Current Symbol IDD Conditions Vin = 0 V, RL = 16 W Vp = 2.4 V Vp = 5.0 V Vp = 2.4 V Vp = 5.0 V Vp = 5.0 V − − Cby = 1.0 mF Cby = 1.0 mF and Vp = 5.0 V Vp = 2.4 V, RL = 16 W Vp = 5.0 V, RL = 16 W Vp = 2.4 V, RL = 32 W Vp = 5.0 V, RL = 32 W Max Rms Output Power POrms Vp = 2.4 V, RL = 16 W, THD+N