la6505 Sanyo Semiconductor Corporation, la6505 Datasheet - Page 12

• Manufacturer Part Number: la6505
• Description: For Cd-rom, Dvd-rom And Md Players Six-channel Driver
• Manufacturer: Sanyo Semiconductor Corporation

Output On/Off Control Functions
BTL Amplifier I/O Relationship
1. Relationships Between Muting Inputs and Output States
2. Relationship Between S/S and the Corresponding Output
* : The BTL amplifier and the loading driver input amplifier operate regardless of the MUTE inputs. The output on/off
* : When both the MUTE and S/S pins are low, the outputs go to the high-impedance state. However, note that the
* : The loading driver input operational amplifier is a voltage-follower circuit (V IN and V IN - are shorted together).
* : To make the I/O relationship easier to see in figure 7, Block Diagram, the diagram is written as though gain is
states are controlled only by muting the output amplifiers.
output amplifier gain setting feedback resistor is connected.
applied in the input amplifier. In the actual circuit, however, the gain occurs in the output amplifier.
MUTE SLED
MUTE SLED
H
H
L
L
VRFF-OUT
VREF-IN
V IN +
V IN *
V IN -
Spindle BTL-AMP
Sled output
OFF
OFF
ON
ON
11kΩ
11kΩ
LA6505
MUTE SLED
H
L
22kΩ
22kΩ
Loading driver output
OFF
ON
44kΩ
44kΩ
V O *+
V O *-
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