sta339bw STMicroelectronics, sta339bw Datasheet - Page 19

• Manufacturer Part Number: sta339bw
• Description: 2.1-channel High-efficiency Digital Audio System
• Manufacturer: STMicroelectronics

STA339BW
3.7
3.7.1
Testing
Functional pin definition
Table 8.
Figure 5.
Figure 6.
PWRDN
TWARN
EAPD
Pin name
DTin(A)
Duty cycle=A
INA
23
20
19
Functional pin definition
Test circuit 1
Test circuit 2
Number
Duty cycle = 50%
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
0
1
0
1
0
1
OUTA
Iout=1.5A
DTout(A)
Doc ID 15251 Rev 4
M57
M58
L67 10µ
470nF
C69
gnd
Low consumption
Normal operation
A temperature warning is indicated by the external power
stage
Normal operation
Low consumption 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 8
DTout(B)
Iout=1.5A
Ω
IC status
+
DTf
-
OUTB
vdc = Vcc/2
Electrical specifications
V67
Q2
Q4
t
(1/4)Vcc
(3/4)Vcc
(1/2)Vcc
Vcc
M64
M63
D06AU1651
Duty cycle=B
INB
DTin(B)
19/77