NTP3000 View Datasheet(PDF) - Unspecified
Part Name
Description
MFG CO.
'NTP3000' PDF : 37 Pages View PDF
Power Integrated Processor for Digital Amplifier
NTP3000
10. Output Interface
10.1. Output mode configuration
The output mode of NTP3000 is 2.0 stereo reproduction mode and 2.1 reproduction mode. For this
configuration register 0x0B~0x0D should be set to appropriate values.
10.2. AM Interference relief mode
The NTP3000 has AM interference reduction mode. In this mode SNR performance of NTP3000 can be
degrade to 90 dB and the PWM switching frequency is spread to 384kHz ~ 768kHz.
10.3. PWM Output Mapper
Any internal channel from one through three that procedures PWM output can be assigned to any PWM
output hardware port(or pin) by mapping output port register. This feature is very helpful for the hardware
designer because it can relieve difficulties in the power stage signal routing and channel assignment if
the output channel order is fixed. See the system register address 0x0B~0x0D in the Appendix 1.
10.4. Switching Output Mode
There are three selectable switching signal output modes called AD and BD mode in NTP3000.
The difference among these output modes is the relative signal pattern relationship between PWM
OUTxA and PWM OUTxB for the channel x.
The selection of output mode is dependent upon the topology of the output stage within NTP3000, and
the design target and policy. AD mode can be applied to both half bridge and full bridge output stage.
BD mode can be used for full bridge output stage only. MD flag of register address 0x03 set the output
mode, then set the design stage.
Mode
Table 7 PWM Output Mode
AD
BD
Output A
Output B
AD asynchronous pair means the normal AD mode PWM output. In other words, A output and B output
of each PWM output pair are mutually complement. In the case of AD asynchronous pair, A output and B
output is perfectly identical, not in complement relation. That is useful in some special case including
single-ended power stage design.
Copyright © NeoFidelity, Inc. 2005
Preliminary datasheet – NeoFidelity reserves the right to change specifications at any time without prior notice
17
R0.73-11.2006
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