TDA8922C Datasheet, PDF (14/40 Pages) NXP Semiconductors – 2 X 75 W class-D power amplifier

NXP Semiconductors
TDA8922C
2 × 75 W class-D power amplifier
Table 8. Static characteristics …continued
V_DD = 30 V; V_SS = −30 V; f_osc = 350 kHz; T_amb = 25 °C; unless otherwise specified.
Symbol Parameter
Conditions
Min Typ Max Unit
T_{act(th_fold)} thermal foldback activation
temperature
closed loop SE voltage gain
[7] _-
153 -
°C
reduced with 6 dB
[1] V_DD is the supply voltage on pins VDDP1, VDDP2 and VDDA.
[2] V_SS is the supply voltage on pins VSSP1, VSSP2, VSSA and VSSD.
[3] Unbalance protection activated when V_DDA > 2 × |V_SSA| OR |V_SSA| > 2 × V_DDA.
[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 T_{act(th_fold)} − 5 °C, gain reduction commences and at a junction temperature of approximately
T_{act(th_prot)}, the amplifier switches off.
V_O (V)
V_{O(offset)(on)}
Standby
V_{O(offset)(mute)}
slope is directly related to the time-constant
of the RC network on the MODE pin
Mute
On
0
0.8
2.1
2.9
Fig 8. Behavior of mode selection pin MODE
12. Dynamic characteristics
4.2
5.5
V_MODE (V)
010aaa585
12.1 Switching characteristics
Table 9. Dynamic characteristics
V_DD = 30 V; V_SS = −30 V; T_amb = 25 °C; unless otherwise specified.
Symbol Parameter
Conditions
Internal oscillator
f_osc(typ) typical oscillator frequency R_OSC = 30.0 kΩ
f_osc
oscillator frequency
External oscillator input or frequency tracking; pin OSC
V_OSC voltage on pin OSC
HIGH-level
V_trip
f_track
trip voltage
tracking frequency
Min
Typ
Max
Unit
290
345
365
kHz
250
-
450
kHz
SGND + 4.5 SGND + 5 SGND + 6 V
-
SGND + 2.5 -
V
[1] ₅₀₀
-
900
kHz
TDA8922C_1
Product data sheet
Rev. 01 — 7 September 2009
© NXP B.V. 2009. All rights reserved.
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