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Class H headphone amplifier MAX97200 features

In Electronic Infomation Category: C | on April 13,2011

MAX97200 is a 45mW H class headphone amplifier with as low as 1.8V single power supply, the use of Maxims second-generation DirectDrive ? technology.

MAX97200 internal use of dual-mode (Dual Mode ?) charge pump to generate the required power supply voltage amplifier. Charge pump can output PVIN / 2 or PVIN voltage, depending on the magnitude of the output signal. When the output signal amplitude is low, the power supply voltage is PVIN / 2. Requires large output signal, switch the mode charge pump to generate a higher supply voltage, so as to provide greater power output load.

DirectDrive amplifiers compared with the first generation, second generation DirectDrive technology has lower power consumption. MAX97200 uses 1.8V voltage regulator and PM7528HS datasheet and power supply, power consumption 0.9V power supply equivalent to the traditional DirectDrive amplifiers.

MAXIMs DirectDrive architecture is a negative power supply voltage inverting charge pump. Headphone amplifier positive supply and PM7528HS price and negative power supply. This program allows the audio output signal to potential bias in the vicinity, eliminating the load between the amplifier and PM7528HS suppliers and headphone output of large DC-blocking capacitors.

Low output offset voltage at the entry and exit off state, with excellent clicks / pop suppression performance. High-fidelity signal to noise ratio support system design.

MAX97200 in a small 12-bump wafer level packaging (WLP 1.27mm x 1.65mm), 0.4mm ball pitch with a small, working in the -40 C to +85 C extended temperature range.


Key features

The second generation DirectDrive technology

dynamic, H class, dual-mode charge pump

low voltage, VPVIN = 1.8V

low quiescent current, VPVIN = 1.8V when the current is only 1.15mA (typ)

without large output DC-blocking capacitors

industry-leading click / pop suppression performance

hi, SNR is 105dB (5.6? V output noise)

for the output power of 34mW into a 32 load (THD + N to 1%)

for the 16 load 45mW output power (THD + N is 10%)

small-size 12-ball, 1.27mm x 1.65mm WLP package (ball interval 0.4mm)

Typical Operating Circuit


Application

cell phone

MP3 Player

Smart Phone

VoIP phone

data download: MAX97200.rar

PM7528HS datasheetPM7528HS suppliersPM7528HS Price

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