Hitachi 55293DLB, Руководство по обслуживанию

Страница: 14 / 86

13
Features

Audio Input/Output
o
25 W Into an 8- Ω Load From a 20-V Supply
o
Wide PVDD Range, From 8V to 26V
o
Supports BTL Configuration with 4- Ω Load
o
Efficient Class-D Operation Elminates Need for Heatsinks
o
One serial Audio Input (Two Audio Channels)
o
I
2
C Address Selection Pin (Chip Select)
o
Single Output Filter PBTL Support
o
Supports 441-kHz to 48-kHz Sample Rate (LJ/RJ/I
2
S)

Audio/PWM Processing
o
Indepent Channel Volume Control With Gain of 24 dB to Mute With 0.125-dB
Resolution Steps
o
Programmable Two-Band Dynamic-Range Control
o
18 Programmable Biquads for Speaker EQ and Other Audio-Processing Features
o
Programmable Coefficients for DRC Filters
o
DC Blocking Filters

General Features
o
I
2
C Serial Control Interface Operational Without MCLK
o
Requires Only 3.3 V and PVDD
o
No External Oscillator: Internal Oscillator for Automatic Rate Detection
o
Surface-Mount, 48-Pin HTQFP Package
o
Thermal and Short-Circuit Protection
o
106-dB SNR, A-Weighted
o
AD,BD, and Ternary Modulation
o
Up to 90% Efficient
o
PWM Level Meter to Measure the Digital Power Profile

Benefits
o
EQ: Speaker Equalization Improves Audio Performance
o
Two-Band DRC: Dynamic Range Compression. Can Be Used As Power Limiter. Enables Speaker
Protection, Easy Listening, Night-Mode Listening
o
Autodetect: Automatically Detects Sample-Rate Changes. No need for External Microprocessor
Intervention

Applications:
o
LCD TV, LED TV, Soundbar