TDA7572 Datasheet, PDF (21/64 Pages) STMicroelectronics – 200W mono bridge PWM amplifier with built-in step-up converter

TDA7572
Electrical specifications
4.3.4 Oscillator
Table 9. Oscillator
Symbol
Parameters
Test conditions
Min.
Typ.
Max. Units
Internal oscillator
PWMCLOCK=[0 1]
100K
120
140K KHz
F_{PWM_NOM} Switching frequency
PWMCLOCK=[1 0]
PWMCLOCK=[0 0]
F_{PWM_NOM}
*2
F_{PWM_NOM}
/2
CLK_DC Duty cycle
48
50
V_{CLK_High} Maximum voltage level
Clock output high value
Load = 20Kohm and 100pF
to buffered SVR
V_P25-0.1
52
%
V_P25
V
V_{CLK_Low} Minimum voltage level
Clock output low value
Load = 20Kohm and 100pF
to buffered SVR
V_M25-0.1
V_M25
V
V_CLK-P-P Peak-peak voltage
Load = 20Kohm and 100pF
to SVR
-10%
4.7
+10% V
Dither cap charge current Dither pin voltage= 2.5V
-20%
100
+20% µA
Dither cap discharge
current
-20%
100
+20% µA
Peak-peak dither voltage
swing
1.4
1.6
1.7
V
Dither external clock
determination
Voltage at the dither pin at to
select external clock function
VDIG-0.2
V
No dither
Voltage at the dither pin at
which no dither will occur
Peak F_PWM increase due
to dither
Cdither=100nF
Peak F_PWM decrease due
to dither
Cdither=100nF
Triangular peak value
+8
-8
VGND+
1V
VDGND
+0.2
V
+10
+12
%
-10
-12
%
VDIG-
1V
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