STK4132 Ver la hoja de datos (PDF) - SANYO -> Panasonic
Número de pieza
componentes Descripción
Fabricante
STK4132 Datasheet PDF : 7 Pages
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STK41322
External Component Description
C1, C2
C3, C4
C5, C6
C15
C11, C12
C9, C10
C14
C7
R3, R4
R1, R2
R5, R9
(R6, R10)
R11, R13
(R12, R14)
R21
R18
R19, R20
R15, R16
Input filter capacitors.
These, together with R3 and R4, form filters to reduce high-band noise.
Input coupling capacitors.
For DC blocking. Since capacitor reactance becomes larger at lower frequencies, the output noise can be adversely affected by
signal source resistance-dependent 1/f noise. In this case, a lower rectance value should be chosen. In order to remove pop noise
at power-on, larger values of capacitance should be chosen for C3 and C4, which determin the input time constant, and smaller
values for C5 and C6 in the NF circuit.
NF capacitors.
These determine the low-side cutoff frequency.
fL=
2π
×
1
C5
×
R5
[Hz]
A large values should be chosen for C5 to maintain voltage gain at low frequencies. However, because this would tend to increase
the shock noise at power-on, a values larger than absolutely necessary should be avoided.
Decoupling capacitors.
This removes shock noise and ripple voltage from the supply.
Bootstrap capacitors.
If these capacitors are made small, then the total harmonic distortion at low frequencies increases significantly.
Oscillation prevention capacitors.
These should be inserted as close as possible to the IC supply pins to reduce supply impedance and hence provide stable IC
operation. Electolytic capacitors are recommended.
Ripple filter capacitor.
This forms a ripple filter in combinatin with internal transistor TR10.
Oscillation prevention capacitors.
Mylar capacitors are recommended for their excellent thermal and frequency characteristics.
Input filter resistors.
Input bias resistors.
These are used to bias the input pins at aero potential. The input impedance is largely determined by this resistance.
Voltage-gain VG setting resistors.
VG=40dB is recommended using R5, R6=560Ω, and R9, R10=56kΩ. Gain adjustments are best made using R5 and R6. If gain
adjustments are made using R5 and R6, then set R1, R2=R9, R10 to maintain VN balance stability.
Bootstrap resistors.
These resistors determine the quiescent current. Values of 2.2kΩ and 2.2kΩ are recommended.
Ripple filter tesistor.
This resistor performs as predriver transistor limiting resistor during load short circuits.
Clipping plus/minus balance resistor.
Ripple filter resistors.
When muting transistor TR11 is on, current flows from ground through TR11 to –VCC. Values of 1kΩ (0.5W) and 1kΩ (0.5W) are
recommended.
Oscillation prevention resistors.
No.2668–6/8
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