P4890K

P4890K APLUS | Alldatasheet

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INTEGRATED CIRCUITS INC.--- aP4890K 1 / 10 ver1.2 aP4890K --- 1.4 Watt Audio Power Amplifier  FEATURES :  2.5V~5.5V Power supply.  Thermal shutdown Protection.  Low current shutdown mode  No output capacitors and networks or bootstrap  capacitors required  Low noise during turn-on and turn-off transitions  Shutdown pin high active.  GENERAL DESCRIPTION : The AP4890K is a 1.4 Watt audio power amplifier. And the AP4890K primarily designed for high Quality application in other portable communication device. It is capable of driving 8Ω speaker load at a continuous average output of 1.4W / 10% distortion (THD+N) from a 5.0V power supply. A feature of the AP4890K amplifier to switch BTL mode. And the AP4890K audio amplifier features low power consumption shutdown mode. It is achieved by driving the shutdown pin with logic high. Besides the AP4890K has an internal thermal shutdown protection feature. The AP4890K amplifier was designed specifically to provide high quality output power with a minimal amount of external components. The AP4890K does not require output capacitors, and the AP4890K is ideally suited for other low voltage applications or portable electronic devices where minimal power consumption is a primary requirement.  APPLICATION :  Portable electronic devices  Mobile Phones  PDAs

INTEGRATED CIRCUITS INC.--- aP4890K 2 / 10 ver1.2  PIN DESCRIPTION : SYMBOL Pin No DESCRIPTION SHUTDOWN 1 Shutdown the device. (when LOW level is shutdown mode) BYPASS 2 Bypass pin +IN 3 Positive Input -IN 4 Negative Input Vo1 5 Negative output VDD 6 Power Supply GND 7 Ground Vo2 8 Positive Output  ABSOLUTE MAXIMUM RATINGS : PARAMETER SYMBOL RATING UNIT Supply Voltage V DD 6.0 V Operating Temperature T A -40 to 85(I grade) ℃ Input Voltage V I -0.3V to VDD +0.3V V Storage Temperature T STG -65 to 150 ℃ Power Dissipation P D Internally Limited W ESD Susceptibility V ESD 2000 V Junction Temperature T JMAX 150 ℃ Soldering Temperature (under 10 sec) TSOLDER 260 ℃

INTEGRATED CIRCUITS INC.--- aP4890K 3 / 10 ver1.2  APPLICATION CIRCUIT :

INTEGRATED CIRCUITS INC.--- aP4890K 4 / 10 ver1.2  VOICE OTP [ DAC ] + AP4890K APPLICATION :  VOICE OTP [ PWM ] + AP4890K APPLICATION :

INTEGRATED CIRCUITS INC.--- aP4890K 5 / 10 ver1.2  DC ELECTRICAL CHARACTERISTICS (TA=25℃) : PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT Power Supply Current IDD VIN = 0V, IO = 0A,8Ω Load VDD =5V - 6.0 18.0 mA VDD =3V - 5.0 15.0 mA Shutdown Current ISD VSHUTDOWN = VDD - 0.1 2.0 μA Output Offset Voltage VOS - 7.0 50.0 mV Resistor Output to GND ROUT-GND - 9.5 - kΩ Output Power Po THD = 10%, f=1kHz,RL=8Ω VDD =5V - 1.4 - W THD = 1%, f=1kHz ,RL=8Ω - 1.1 - THD = 10%, f=1kHz,RL=8Ω VDD =3V - 480 - mW THD = 1%, f=1kHz,RL=8Ω - 375 - Total Harmonic Distortion+ Noise THD+N Po=780 mWrms; f = 1kHz VDD =5V - 0.1 - % Po=265 mWrms; f = 1kHz VDD =3V - 0.12 - % Power Supply Rejection Ratio PSRR Vripple= 200mV sine p-p, Input = Floating VDD =5V - 66 (Ps1) - dB VDD =3V - 62 (Ps2) - dB Wake-up time TWU Bypass Cap.=1.0uF VDD =5V - 145 - Ms VDD =3V - 82 - ms Thermal Shutdown Temperature TSD 150 170 190 ℃ Shut Down Time TSDT 8 Ω load - 1.0 - ms ps1 : 66 dB( 217Hz ) / 66 dB( 1KHz ) ps2 : 62 dB( 217Hz ) / 62 dB( 1KHz )

INTEGRATED CIRCUITS INC.--- aP4890K 6 / 10 ver1.2  TYPICAL PERFORMANCE CHARACTERISTICS :

INTEGRATED CIRCUITS INC.--- aP4890K 7 / 10 ver1.2  APPLICATION INFORMATION : BRIDGED CONFIGURATION EXPLANATION As shown in Figure 1, the AP4890K has two operational amplifiers internally, allowing for a few Different amplifier configurations. The first amplifier’s gain is externally configurable, while the second amplifier is internally fixed in a unity-gain, inverting configuration. The closed-loop gain of the first amplifier is set by selecting the ratio of Rf to RIN while the second amplifier’s gain is fixed by the two internal 20kΩ resistors. Figure 1 shows that the output of amplifier one serves as the input to amplifier two which results in both amplifiers producing signals identical in magnitude, but out of phase by 180°. Consequently, the differential gain for the IC is By driving the load differentially through outputs Vo1 and Vo2, an amplifier configuration commonly referred to as “bridged mode” is established. Bridged mode operation is different from the classical single-ended amplifier configuration where one side of the load is connected to ground.

Provides differential drive to the load, thus doubling output swing for a specified supply voltage. clipping, please refer to the Audio Power Amplifier Design section. power dissipation and also possible loudspeaker damage. fc, determined in equation Equation 2. Equation 3 is reconfigured to solve for the input coupling capacitance. In the table 1 shows the external components. Rin in connect with Cin to create a high-pass filter. Table 1. Typical Component Values

INTEGRATED CIRCUITS INC.--- aP4890K 9 / 10 ver1.2  SOP8 : ( 150 mil )

INTEGRATED CIRCUITS INC.--- aP4890K 10 / 10 ver1.2  DIP8 : ( 300 mil )