A22H165M Datasheet, PDF (5/32 Pages) STMicroelectronics – Integrated high-efficiency buck converter

A22H165M
2
Typical application schematic
Typical application schematic
Figure 1. Typical application schematic for the A22H165M
Vbat
L1
Cs
2.2 uF
3.3 uH
Negative left input
Positive left input
Negative right input
Positive right input
Cin
2.2 uF
InL-
Cin
2.2 uF
Cin
2.2 uF
InL+
InR+
Cin
2.2 uF
InR-
SDA
SCL I2C
I2C bus
AVdd
Sw
Positive HpVdd
supply
-
Level
VoutL
+
detector
CMS
Level
detector
VoutR
Negative
supply
PVss
C1 C2
Css
2.2 uF
C12
2.2 uF
AGnd
Ct
10 uF
Rout
12 ohms min.
Rout
12 ohms min.
Cout
0.8 nF min.
3 J1
2
1
Cout
0.8 nF min.
AM06119
Pin n°
A1
A2
A3
A4
B1
B2
B3
B4
C1
C2
C3
C4
D1
D2
D3
D4
Table 3. A22H165M pin description
Pin name
Pin definition
SW
Switching node of the buck converter
AVDD
Analog supply voltage, connect to battery
VOUTL Output signal for left audio channel
INL-
Negative input signal for left audio channel
AGND
Device ground
C1
Flying capacitor terminal for internal negative supply generator
HPVDD Buck converter output, power supply for amplifier
INL+
Positive input signal for left audio channel
C2
Flying capacitor terminal for internal negative supply generator
PVSS
Negative supply generator output
CMS
Common mode sense, to be connected as close as possible to the
ground of headphone/line out plug
INR+
Positive input signal for right audio channel
SDA
SCL
VOUTR
I²C data signal, up to V_CC tolerant input
I²C clock signal, up to V_CC tolerant input
Output signal for right audio channel
INR-
Negative input signal for right audio channel
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