TDA2030 데이터 시트보기 (PDF) - Unisonic Technologies
부품명
상세내역
제조사
TDA2030 Datasheet PDF : 13 Pages
| |||
UTCTDA2030 LINEAR INTEGRATED CIRCUIT
SR(V/µs)
m2
m1
Fig.23 20kHz sawtooth waveform
Input
Signal
Filtered
Output
Siganal
Fig.24 Inverting sawtooth waveform
The result is an AC signal at the output whole peak-to-peak value is the TIM voltage, which can be measured
easily with an oscilloscope. If the peak-topeak value of the signal and the peak-to-peak of the inverting sawtooth are
measured, the TIM can be found very simply from:
VOUT
TIM =
* 100
Vsawtooth
101
TIM(%)
100
Fig. 25 TIM distortion Vs.
Output Power
UTC2030A
BD908/907
Gv=26dB
Vs=36V
RL=4Ω
102
SR(V/米s)
Fig. 26 TIM design
diagram(fc=30kHz)
RC Filter fc=30kHz
101
10-1
RC Filter fc=30kHz
100
10-2
10-1
100
101 Po(W) 102
10-1
10-1
100
101
102
Vo(Vp-p)
In Fig.25 The experimental results are shown for the 30W amplifier using the UTC2030A as a driver and a
low-cost complementary pair. A simple RC filter on the input of the amplifier to limit the maximum signal slope(SS) is
an effective way to reduce TIM.
The Diagram of Fig.26 originated by SGS can be used to find the Slew-Rate(SR) required for a given output power
or voltage and a TIM design target.
For example if an anti-TIM filter with a cutoff at 30kHz is used and the max. Peak to peak output voltage is 20V then,
referring to the diagram, a Slew-Rate of 6V/µs is necessary for 0.1% TIM.
As shown Slew-Rates of above 10V/µs do not contribute to a further reduction in TIM.
Slew-Rates of 100V/µs are not only useless but also a disadvantage in hi-fi audio amplifiers because they tend to
turn the amplifier into a radio receiver.
POWER SUPPLY
Using monolithic audio amplifier with non regulated supply correctly. In any working case it must provide a supply
voltage less than the maximum value fixed by the IC breakdown voltage.
UTC
UNISONIC TECHNOLOGIES CO., LTD. 11
QW-R107-004,A
Share Link: 