RT9108NL Datasheet, PDF (2/13 Pages) Richtek Technology Corporation – 9W Stereo Class-D Audio Power Amplifier

RT9108NL
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.
Open Drain Output used to Display Short Circuit Fault Status. Voltage compliant
2
to AVCC. Short circuit faults can be set to auto recovery by connecting FAULT pin
FAULT
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
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.
9
GVDD
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.
19, 24
PGND
Power Ground for H-Bridges.
20
OUTNR Class-D H-Bridge Negative Output for Right Channel.
21
BSNR
Bootstrap I/O for Right Channel. Negative high side FET.
22
BSNL
Bootstrap I/O for Left Channel. Negative high side FET.
23
OUTNL Class-D H-Bridge Negative Output for Left Channel.
25
OUTPL Class-D H-Bridge Positive Output for Left Channel.
26
BSPL
Bootstrap I/O for Left Channel. Positive high side FET.
28
PVCCL
Power Supply Input for Left Channel H-Bridge. Right channel and left channel
power supply inputs are connected internally.
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS9108NL-01 June 2012