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Dual 2.7W Audio Amplifier Plus Stereo Headphone & Stereo Enhanced
General Description
The SN4188 is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will deliver 2.7W to a 4Ω load.
A user selectable “Stereo Enhanced” mode provides enhanced stereo imaging. The SN4188 also has two separate HP (headphone) enable inputs, each having different logic level thresholds. Either HP enable input activates the single ended headphone mode and disables the BTL output mode. The HP Sense input is for use with a normal stereo headphone jack. The remaining input, HP Logic, accepts standard logic level thresholds.
To simplify audio system design, the SN4188 combines dual bridge speaker amplifiers and stereo headphone amplifiers on one chip.
The SN4188 features a low-power consumption shutdown mode and thermal shutdown protection. It also utilizes circuitry to reduce “clicks and pops” during device turn-on.
Key Specifications
- PO at 1% THD+N, VDD = 5V
RL = 4Ω 2.2W (typ)
RL = 8Ω 1.4W (typ)
- Single-ended mode THD+N at
75mW into 32Ω (5V, 1 kHz) 0.01% (typ)
- Shutdown current 0.04μA (typ)
- Supply voltage range 2.7V to 5.5V
- WQFN24(4mm*4mm*0.75mm) Package
Features
- Stereo Enhanced
- Selectable headphone enable modes
- Stereo headphone amplifier mode
- Suppress “click and pop”
- Thermal shutdown protection circuitry
- Micro power shutdown mode
Applications
- Cell phones, PDA, MP4,PMP
- Portable and desktop computers
- Desktops Audio System
- Multimedia monitors
Typical Application
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