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TDA8922C Datasheet(PDF) 14 Page - NXP Semiconductors

Part No. TDA8922C
Description  2 X 75 W class-D power amplifier
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Maker  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
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TDA8922C Datasheet(HTML) 14 Page - NXP Semiconductors

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TDA8922C_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 7 September 2009
14 of 40
NXP Semiconductors
TDA8922C
2
× 75 W class-D power amplifier
[1]
VDD is the supply voltage on pins VDDP1, VDDP2 and VDDA.
[2]
VSS is the supply voltage on pins VSSP1, VSSP2, VSSA and VSSD.
[3]
Unbalance protection activated when VDDA > 2 ×|VSSA| OR |VSSA| > 2 × VDDA.
[4]
With respect to SGND (0 V).
[5]
The transition between Standby and Mute modes has hysteresis, while the slope of the transition between Mute and Operating modes is
determined by the time-constant of the RC network on pin MODE; see Figure 8.
[6]
DC output offset voltage is gradually applied to the output during the transition between Mute and Operating modes. The slope caused
by any DC output offset is determined by the time-constant of the RC network on pin MODE.
[7]
At a junction temperature of approximately Tact(th_fold) − 5 °C, gain reduction commences and at a junction temperature of approximately
Tact(th_prot), the amplifier switches off.
12. Dynamic characteristics
12.1 Switching characteristics
Tact(th_fold)
thermal foldback activation
temperature
closed loop SE voltage gain
reduced with 6 dB
[7] -
153
-
°C
Table 8.
Static characteristics …continued
VDD =30V; VSS = −30 V; fosc = 350 kHz; Tamb = 25 °C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Fig 8.
Behavior of mode selection pin MODE
Standby
Mute
On
5.5
010aaa585
VMODE (V)
4.2
2.9
2.1
0.8
0
VO (V)
VO(offset)(mute)
VO(offset)(on)
slope is directly related to the time-constant
of the RC network on the MODE pin
Table 9.
Dynamic characteristics
VDD =30V; VSS = −30 V; Tamb = 25 °C; unless otherwise specified.
Symbol Parameter
Conditions
Min
Typ
Max
Unit
Internal oscillator
fosc(typ)
typical oscillator frequency
ROSC = 30.0 kΩ
290
345
365
kHz
fosc
oscillator frequency
250
-
450
kHz
External oscillator input or frequency tracking; pin OSC
VOSC
voltage on pin OSC
HIGH-level
SGND + 4.5 SGND + 5
SGND + 6
V
Vtrip
trip voltage
-
SGND + 2.5 -
V
ftrack
tracking frequency
[1]
500
-
900
kHz


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