The United States listed on the integration of D audio amplifier and other white LED driver IC

MAX8821 integrated products (Maxim Integrated Products) listed on the integrated mono channel D audio amplifier and 2 low saturation (LDO:Low Drop Out) regulators of the white LED driver "". Mainly for mobile phones, smart phones, PDA and portable media players, etc..

Built in charge pump circuit can drive up to 6 parallel white LED. The driving current of each LED can be adjusted in the range of 0.1M to 25.6mA 32. Dimming via I2C interface. Class D audio amplifier when the input voltage is + 5V, power to the speaker output of 4 of the largest 2W. Bridge load (BTL) output stage. In this way, compared with the original single output stage, the output power can be about 4 times, and the output coupling capacitor is not needed. Differential input signal. PSRR (power supply rejection ratio) at 1kHz is 65dB. The gain in -3 ~ 24dB range can be set to 3dB for each file to. Low saturation voltage regulator, a 1.2 ~ 3.2V voltage, maximum output current of 300mA; the other one in the 1.5 ~ 3.3V voltage, maximum output current of 200mA. Package using 4mm square, 28 pin TQFN. The working temperature range of -40 to 85 C. 1000 more than the bulk of the reference price of $2.55 purchase

Source: Nikkei BP