NCP2817 NOCAP LongPlay Headphone Amplifier NCP2817 is a dual LongPlay true ground headphone amplifier designed for portable communication device applications such as mobile phones. This part is capable of delivering typical 27 mW of www.onsemi.com continuous average power into a 32 load from a 1.8 V power supply with a THD+N of 1%. MARKING Based on the power supply delivered to the device, an internal DIAGRAM power management block generates a symmetrical positive and negative voltage. Thus, the internal amplifiers provide outputs 12 PIN CSP 817BC FC SUFFIX referenced to Ground and the losses are reduced which helps to ALYWW CASE 499BJ increase the battery life. In this NOCAP configuration, the two external heavy coupling capacitors can be removed. It offers A = Assembly Location significant space and cost savings compared to a typical stereo L = Wafer Lot application. Y = Year NCP2817 is available with internal gain of 1.5 V/V. It reaches a WW = Work Week = PbFree Package superior 100 dB PSRR and noise floor. Thus, it offers high fidelity audio sound, as well as a direct connection to the battery. It contains circuitry to prevent from Pop & Click noise that would otherwise occur during turnon and turnoff transitions. The device is available PIN ASSIGNMENT in 12 bump CSP package (1.62 x 1.22, 0.4P) which helps to save space on the board. A1 A2 A3 A4 Features NOCAP Output Eliminates DCBlocking Capacitors: CPM PVM INL INR Saves Board Area Saves Component Cost B1 B2 B3 B4 No LowFrequency Response Attenuation PGND /SD AGND SGND LongPlay Architecture: Increase the Battery Life C1 C2 C3 C4 High PSRR (100 dB): Direct Connection to the Battery High SNR Performance (100 dB) CPP VP OUTL OUTR Pop and Click Noise Protection Circuitry (Top View) Internal Gain (1.5 V/V) or External Adjustable Gain 12Pin 1.2 x 1.6 mm CSP Ultra Low Current Shutdown Mode High Impedance Mode ORDERING INFORMATION See detailed ordering and shipping information on page 9 of 1.6 V 5.5 V Operation this data sheet. Thermal Overload Protection Circuitry CSP 1.62 x 1.22, 0.4P These Devices are PbFree, Halogen Free/BFR Free and are RoHS Compliant Typical Applications Headset Audio Amplifier for Cellular Phones MP3 player Personal Digital Assistant and Portable Media Player Portable devices Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: November, 2015 Rev. 0 NCP2817/DNCP2817 V RP P VM Power Management & P GND Charge Pump V RM V RP IN L OUT L + V RM /SD Pop & Click Biasing Suppression V RP + OUT R IN R V RM Figure 1. Block Diagram PIN FUNCTION DESCRIPTION Pin Name Pin Type Description A1 C Input / Charge pump flying capacitor negative terminal. A 1 F ceramic capacitor to C is required PM PP Output A2 P Output Charge pump output. A 1 F ceramic capacitor to ground is needed VM A3 IN Input Left input of the audio source L A4 IN Input Right input of the audio source R B1 P Ground Power ground. This pin should be connected directly to the ground plane. GND B2 /SD Input Enable activation. B4 S Ground Sense Ground. Connect to shield terminal of headphone jack or ground plane. GND C1 C Input / Charge pump flying capacitor positive terminal. A 1 F ceramic capacitor to C is required PP PM Output C2 V Power Positive supply voltage. Connected to single secondary cell LithiumIon battery or any other kind of P power supply C3 OUT Output Left audio channel output signal L C4 OUT Output Right audio channel output signal R B3 A Ground Analog ground. This pin should be connected directly to the GND plane. Careful layout and no direct GND connection to other ground pins are required to ensure good noise immunity www.onsemi.com 2 A GND V P C PP C PM S GND