sta335bw STMicroelectronics, sta335bw Datasheet - Page 13

• Manufacturer Part Number: sta335bw
• Description: 2.1 Channels High Efficiency Digital Audio System
• Manufacturer: STMicroelectronics

STA335BW
3.4
3.4.1
Testing
Functional pin status
Table 6.
Figure 3.
Figure 4.
Pin name
PWRDN
PWRDN
TWARN
TWARN
DTin(A)
EAPD
EAPD
Duty cycle=A
INA
Functional pin status
Test circuit 1
Test circuit 2
Duty cycle = 50%
Pin #
23
23
20
20
19
19
M58
M57
High Current Dead time for Bridge application = ABS(DTout(A)-DTin(A))+ABS(DTOUT(B)-DTin(B))
Duty cycle A and B: Fixed to have DC output current of 4A in the direction shown in figure
Low current dead time = MAX(DTr,DTf)
INxY
Q1
Q3
Logic value
OUTA
Iout=1.5A
DTout(A)
0
1
0
1
0
1
M58
M57
L67 10µ
470nF
C69
gnd
Low Absorption
Normal Operation
From external power stage is indicated a Temperature
Warning.
Normal Operation
Low Absorption for power stage. All internal regulators are
switched off.
Normal operation
+Vcc
OUTxY
C71 470nF
Rload=4Ω
+V
CC
OUTxY
470nF
L68 10µ
C70
DTr
R 8Ω
DTout(B)
Iout=1.5A
IC-STATUS
DTf
+
-
OUTB
vdc = Vcc/2
Electrical specifications
V67 =
D03AU1458
Q2
Q4
t
Vcc
(3/4)Vcc
(1/2)Vcc
(1/4)Vcc
M64
M63
D06AU1651
Duty cycle=B
INB
DTin(B)
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