Sharp LC-32LE351K (serv.man2) Service Manual ▷ View online
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LC-32LE351
LC-39LE351
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b. Features
• Audio Input/Output
– TAS5717 Supports 2×10 W and TAS5719 Supports 2×15 W Output
– Wide PVDD Range, From 4.5 V to 26 V
– Efficient Class-D Operation Eliminates Need for Heatsinks
– Requires Only 3.3 V and PVDD
– One Serial Audio Input (Two Audio Channels)
– I2C Address Selection via PIN (Chip Select)
– Supports 8-kHz to 48-kHz Sample Rate (LJ/RJ/I2S)
– External Headphone-Amplifier Shutdown Signal
– Integrated CAP-Free Headphone Amplifier
– Stereo Headphone (Stereo 2-V RMS Line Driver) Outputs
• Audio/PWM Processing
– Independent Channel Volume Controls With 24-dB to Mute
– Programmable Two-Band Dynamic Range Control
– 14 Programmable Biquads for Speaker EQ
– Programmable Coefficients for DRC Filters
– DC Blocking Filters
– 0.125-dB Fine Volume Support
• General Features
– Serial Control Interface Operational Without MCLK
– Factory-Trimmed Internal Oscillator for Automatic Rate Detection
– Surface Mount, 48-Pin, 7-mm × 7-mm HTQFP Package
– AD, BD, and Ternary PWM-Mode Support
– Thermal and Short-Circuit Protection
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LC-32LE351
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• Benefits
– EQ: Speaker Equalization Improves Audio Performance
– DRC: Dynamic Range Compression. Can Be Used As Power Limiter. Enables
Speaker Protection, Easy Listening, Night-Mode Listening
– DirectPath Technology: Eliminates Bulky DC Blocking Capacitors
– Stereo Headphone/Stereo Line Drivers: Adjust Gain via External Resistors, Dedicated
Active Headpone Mute Pin, High Signal-to-Noise Ratio
– Two-Band DRC: Set Two Different Thresholds for Low- and High-Frequency
Content
c. Pin descriptions and functions:
Figure 2: Pin description
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LC-39LE351
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Table 2: Pin functions
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LC-32LE351
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Table 3: Recomnended operating conditions
B. MAIN AMPLIFIER (TS4962M)(2.5 W option)
a. General Description
The TS4962M is a differential Class-D BTL power amplifier. It is able to drive up to 2.3W
into a 4Ω load and 1.4W into a 8Ω load at 5V. It achieves outstanding efficiency (88%typ.)
compared to classical Class-AB audio amps. The gain of the device can be controlled via two
external gain-setting resistors. Pop & click reduction circuitry provides low on/off switch
noise while allowing the device to start within 5ms. A standby function (active low) allows
the reduction of current consumption to 10nA typ.
compared to classical Class-AB audio amps. The gain of the device can be controlled via two
external gain-setting resistors. Pop & click reduction circuitry provides low on/off switch
noise while allowing the device to start within 5ms. A standby function (active low) allows
the reduction of current consumption to 10nA typ.
b. Features
- Operating from VCC = 2.4V to 5.5V
- Standby mode active low
- Output power: 3W into 4Ω and 1.75W into 8Ω
- with 10% THD+N max and 5V power supply.
- Output power: 2.3W @5V or 0.75W @ 3.0V
- into 4Ω with 1% THD+N max.
- Output power: 1.4W @5V or 0.45W @ 3.0V
- into 8Ω with 1% THD+N max.
- Adjustable gain via external resistors
- Low current consumption 2mA @ 3V
- Efficiency: 88% typ.
- Signal to noise ratio: 85dB typ.
- PSRR: 63dB typ. @217Hz with 6dB gain
- PWM base frequency: 250kHz
- Low pop & click noise
- Thermal shutdown protection
- Available in flip-chip 9 x 300μm (Pb-free)
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c. Pin descriptions and functions:
Figure 3: Pin description
c. Pin descriptions and funtions:
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c. Pin descriptions and functions:
Figure 3: Pin description
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