RT9108N Datasheet, PDF (2/14 Pages) Richtek Technology Corporation – 15W Stereo Class-D Audio Power Amplifier

RT9108N
Pin Configurations
(TOP VIEW)
SD
FAULT
LINP
LINN
GAIN0
GAIN1
AVCC
AGND
GVDD
PLIMIT
RINN
RINP
NC
MUTE
28
2
27
3
26
4
25
5
24
6
23
7 _AGND 22
8
21
9
20
10
19
11
18
12
17
13
16
29
14
15
PVCCL
NC
BSPL
OUTPL
PGND
OUTNL
BSNL
BSNR
OUTNR
PGND
OUTPR
BSPR
NC
PVCCR
TSSOP-28 (Exposed Pad)
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
SD
Shutdown Logic Input for Audio Amp (High = outputs enabled). TTL logic levels
with compliance to AVCC.
2
FAULT
Open Drain Output for Short Circuit Fault Status. Short circuit faults can be set to
auto recovery by connecting FAULT pin to SD pin.
3
LINP
Positive Audio Input for Left Channel. Biased at 2V.
4
LINN
Negative Audio Input for Left Channel. Biased at 2V.
5
GAIN0
Gain Select Least Significant Bit.
6
GAIN1
Gain Select Most Significant Bit.
7
AVCC
Analog Supply Input.
8,
29 (Exposed Pad)
AGND
9
GVDD
Analog Ground. Connect to the thermal pad. The exposed pad must be soldered
to a large PCB and connected to AGND for maximum power dissipation.
High Side FET Gate Drive Supply. Nominal voltage is 4.6V.
10
PLIMIT
Power Limit Level Adjustment.
11
RINN
Negative Audio Input for Right Channel. Biased at 2V.
12
RINP
Positive Audio Input for Right Channel. Biased at 2V.
13, 16, 27 NC
No Internal Connection.
14
MUTE
Mute Logic Input for Audio Amp (Low = outputs enabled).
15
PVCCR
Power Supply Input for Right Channel H-Bridge. Right channel and left channel
power supply inputs are connected internally.
17
BSPR
Bootstrap I/O for Right Channel, Positive High Side FET.
18
OUTPR
Class-D H-Bridge Positive Output for Right Channel.
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS9108N-00 June 2012