STA505 STMicroelectronics, STA505 Datasheet - Page 6

• Manufacturer Part Number: STA505
• Description: IC AMP AUDIO PWR 50W D POWERSO36
• Manufacturer: STMicroelectronics
• Type: Class Dr

Specifications of STA505

• Output Type: 1-Channel (Mono) or 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 50W x 2 @ 8 Ohm, 80W x 1 @ 8 Ohm
• Voltage - Supply: 10 V ~ 36 V
• Features: Thermal Shutdown Protection
• Mounting Type: Surface Mount
• Package / Case: PowerSO-36 Exposed Top Pad
• Operational Class: Class-AB
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 10@8Ohm@50W%
• Single Supply Voltage (typ): 12/15/18/24/28V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Rail/rail I/o Type: No
• Single Supply Voltage (min): 10V
• Single Supply Voltage (max): 36V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 90C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 36
• Package Type: PSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2142; 497-2142-5; 497-2142

STA505
Figure 4. Test Circuit.
Figure 5.
Figure 6.
6/10
DTin(A)
Duty cycle=A
INxA
Duty cycle = 50%
Low current dead time = MAX(DTr,DTf)
INxA
INxY
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 4.5A in the direction shown in figure
Q1
Q3
OUTxA
Iout=4.5A
DTout(A)
M58
M57
L67 22µ
gnd
470nF
C69
+Vcc
Q1
Q3
OUTxA
OUTxY
GND
C71 470nF
Rload=8Ω
+V
+V
CC
CC
OUTxB
Q2
Q4
OUTxY
470nF
L68 22µ
C70
DTr
R 8Ω
DTout(B)
Iout=4.5A
D00AU1134
OUTxB
DTf
+
-
Q2
Q4
vdc = Vcc/2
V67 =
D03AU1458
INxB
M64
M63
t
Vcc
(3/4)Vcc
(1/2)Vcc
(1/4)Vcc
D00AU1162A
Duty cycle=B
INxB
DTin(B)