HWD2182 Datasheet, PDF(3/12 Page) List of Unclassifed Manufacturers – 250mW Audio Power Amplifier with Shutdown Mode

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HWD2182 Datasheet, PDF (3/12 Pages) List of Unclassifed Manufacturers – 250mW Audio Power Amplifier with Shutdown Mode

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Electrical Characteristics (Notes 1, 2) (Continued)

The following specifications apply for VDD = 3V unless otherwise specified. Limits apply for TA = 25ËC.

Symbol

Parameter

Conditions

HWD2182

Typical Limit

(Note 5) (Note 6)

THD + N

Total Harmonic Distortion + Noise RL = 8â¦, P O = 70 mWrms;

0.25

RL = 32â¦, PO = 30 mWrms;

0.3

f = 1 kHz

PSRR

Power Supply Rejection Ratio

Vpin3 = 2.5V, V ripple = 200 mVrms,

f = 120 Hz

Units

(Limits)

Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified.

Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func-

tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-

antee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is

given, however, the typical value is a good indication of device performance.

Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, Î¸JA, and the ambient temperature TA. The maximum

allowable power dissipation is P DMAX = (TJMAX â TA)/Î¸JA. For the HWD2182, TJMAX = 150ËC, and the typical junction-to-ambient thermal resistance, when board

mounted, is 210ËC/W for the MUA08A Package and 170ËC/W for the M08A Package.

Note 4: Human body model, 100 pF discharged through a 1.5 kâ¦ resistor.

Note 5: Typicals are measured at 25ËC and represent the parametric norm.

External Components Description

(Refer to Figure 1)

Components

Functional Description

1. Ri

2. Ci

3. Rf

4. CS

Inverting input resistance which sets the closed-loop gain in conjunction with Rf. This resistor also forms a

high pass filter with Ci at fc = 1 / (2ÏRiCi).

Input coupling capacitor which blocks the DC voltage at the amplifierâs input terminals. Also creates a

highpass filter with Ri at fc = 1 / (2ÏRiC i). Refer to the section, Proper Selection of External Components,

for an explanation of how to determine the values of Ci.

Feedback resistance which sets closed-loop gain in conjunction with Ri.

Supply bypass capacitor which provides power supply filtering. Refer to the Application Information section

for proper placement and selection of the supply bypass capacitor.

5. CB

6. CO

Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External

Components, for information concerning proper placement and selection of CB.

Output coupling capacitor which blocks the DC voltage at the amplifierâs output. Forms a high pass filter wth

RL at fO = 1 / (2ÏRLC O).

Typical Performance Characteristics

THD+N vs Frequency

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