User Manual


SLOS406A − FEBRUARY 2003 − REVISED MARCH 2003
4
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Terminal Functions
TERMINAL
I/O
DESCRIPTION
NO. NAME
I/O
DESCRIPTION
AGND 9, 10, 26 − Analog ground for digital/analog cells in core
AV
CC
33 − High-voltage analog power supply (8.5 V to 14 V)
AV
DD
29 O 5-V Regulated output
AV
DD
REF 7 O 5-V Reference output—provided for connection to adjacent VREF terminal.
BSLN 13 I/O Bootstrap I/O for left channel, negative high-side FET
BSLP 24 I/O Bootstrap I/O for left channel, positive high-side FET
BSRN 48 I/O Bootstrap I/O for right channel, negative high-side FET
BSRP 37 I/O Bootstrap I/O for right channel, positive high-side FET
COSC 28 I/O I/O for charge/discharging currents onto capacitor for ramp generator triangle wave biased at V2P5
FADE 30 I Input for controlling volume ramp rate when cycling SD or during power-up. A logic low on this pin places
the amplifier in fade mode. A logic high on this pin allows a quick transition to the desired volume setting.
LINN 6 I Negative differential audio input for left channel
LINP 5 I Positive differential audio input for left channel
LOUTN 16, 17 O Class-D 1/2-H-bridge negative output for left channel
LOUTP 20, 21 O Class-D 1/2-H-bridge positive output for left channel
MUTE 34 I A logic high on this pin disables the outputs. A low on this pin enables the outputs.
NC 31, 32,
35
− Not internally connected
PGNDL 18, 19 − Power ground for left channel H-bridge
PGNDR 42, 43 − Power ground for right channel H-bridge
PVCCL 14, 15 − Power supply for left channel H-bridge (tied to pins 22 and 23 internally), not connected to PVCCR or
AV
CC
.
PVCCL 22, 23 − Power supply for left channel H-bridge (tied to pins 14 and 15 internally), not connected to PVCCR or
AV
CC
.
PVCCR 38,39 − Power supply for right channel H-bridge (tied to pins 46 and 47 internally), not connected to PVCCL or
AV
CC
.
PVCCR 46, 47 − Power supply for right channel H-bridge (tied to pins 38 and 39 internally), not connected to PVCCL or
AV
CC
.
REFGND 12 − Ground for gain control circuitry. Connect to AGND. If using a DAC to control the volume, connect the DAC
ground to this terminal.
RINP 3 I Positive differential audio input for right channel
RINN 2 I Negative differential audio input for right channel
ROSC 27 I/O Current setting resistor for ramp generator. Nominally equal to 1/8*V
CC
ROUTN 44, 45 O Class-D 1/2-H-bridge negative output for right channel
ROUTP 40, 41 O Class-D 1/2-H-bridge positive output for right channel
SD 1 I Shutdown signal for IC (low = shutdown, high = operational). TTL logic levels with compliance to V
CC
.
VCLAMPL 25 − Internally generated voltage supply for left channel bootstrap capacitors.
VCLAMPR 36 − Internally generated voltage supply for right channel bootstrap capacitors.
VOLUME 11 I DC voltage that sets the gain of the amplifier.
VREF 8 I Analog reference for gain control section.
V2P5 4 O 2.5-V Reference for analog cells, as well as reference for unused audio input when using single-ended
inputs.