Pin Description
Pin No.
Symbol
8
IN
LV4991TH
Pin voltage
VCC = 3.6V
1.81
Description
Input pin
3
STBY
Voltage
impression
Standby pin
•Standby mode at 0 to 0.3V
•Operation mode at 1.9 to VCC
Equivalent circuit
VCC
8
3kΩ
-
+
VCC
21kΩ
3
1
VREF
1.81
Ripple filter pin
(For connection of capacitor for filter)
VCC
1
450kΩ
2
CNT
Voltage
impression
Second amplifier stop control pin
•Second amplifier stopped at 0 to
0.3V
GND
VCC
GND
VCC
4
OUT2
6
OUT1
1.81
Power amplifier output pin
5
GND
7
VCC
0
Voltage
impression
(3.6)
Ground pin
Power pin
11kΩ
2
GND
VCC
-
4
+
6
10kΩ
No.A0743-5/11