CST8102A Summary:
    CST8102A is an FM interference free, 4 Ω 6W, mono AB/D class audio power amplifier. The ultra-low EMI is very suitable for use in portable devices with FM function.
    CST8102A can be easily switched to Class AB mode through a MODE pin, completely eliminating EMI interference.
    The operating voltage range of CST8102A is 2.5-7.0V. In the D-class amplifier mode, it can provide an efficiency of over 90%. The new unfiltered structure can eliminate the low-pass filter of traditional D-class amplifiers. The unique DRC (Dynamic Range Control) technology of                  CST8102A reduces the distortion caused by waveform clipping during high-power output. Compared with similar products, it has better dynamic response.
    CST8102A offers ESOP8 package with heat sink.

CST8102A Features:
CS8102A AB and D class switching function
CS8102A Class D output power:
    －6.0W (VDD=7.0V, RL=4Ω，THD+N=10%)
    －7.3W (VDD=7.0V, RL=3Ω，THD+N=10%)

CST8102A AB class output power:
    －5.2W (VDD=5.0V, RL=2Ω，THD+N=10%)
Unfiltered AB/D class amplifier, low static current and low EMI
Low distortion and low noise
Input voltage 2.5V-7.0V
FM mode without interference
Enable and disable POP pack inhibition function
Turn off current (<1uA)
Over temperature and short circuit protection function
CST8102A offers ESOP8 package with heat sink.

CST8102A Application:
Security monitoring system
Smart door lock application
Portable audio devices
Loudspeaker
Card insertion speaker, Bluetooth city speaker, USB speaker

CST8102A Ordering Instructions：

Part No.	Package	Mark*	Tape/Reel
CST8102A	eSOP8	CST-LOGO-CST8102A XXXXXX	4000 pieces/disc
CST8102A	eSOP8	Whiteboard without silk screen printing XXXXXX	4000 pieces/disc

CST8102A Typical application schematic：

Note: The MODE pin is suspended as Class AB

CST8102A PCB design considerations:
    If there are via holes in the power supply pin (VDD) wiring network, a porous connection must be used and the inner diameter of the via holes must be increased. It is not allowed to directly connect with a single via hole. The power capacitor should be placed as close to the pin as possible.
    The input capacitor (Cin) and input resistor (Rin) should be placed as close as possible to the pins of the power amplifier chip, and it is best to use a ground wrapping method for wiring, which can effectively suppress the noise of other signal coupling.
    The bottom heat sink of CST8102A is recommended to be soldered onto the PCB board for chip heat dissipation. It is suggested to use large-area copper plating on the PCB to connect the heat sink in the middle of the chip, with a certain range of exposed copper to help with chip heat dissipation.
    The wiring pins of CST8102A output connected to the speaker should be as short as possible, and the wiring width should be at least 0.4mm.

CST8102A Pin diagram and pin description：

CST8102A Test Method：
    Filter testing must be added when testing Class D mode. AUX-0025 is a filter. In order to test the data accurately and in line with practical applications, an inductor is connected in series at the RL load end to simulate the parasitic inductance in the speaker