max9746 Maxim Integrated Products, Inc., max9746 Datasheet - Page 9

• Manufacturer Part Number: max9746
• Description: Max9746 1.2w, Low-emi, Filterless, Class D Audio Amplifier
• Manufacturer: Maxim Integrated Products, Inc.

Figure 1. MAX9746 Outputs with an Input Signal Applied
Table 1. Operating Modes
SYNC INPUT
Clocked
FLOAT
GND
V
DD
V
V
V
IN+
OUT+
IN-
- V
OUT-
OUT+
OUT-
FFM with f
FFM with f
SSM with f
FFM with f
_______________________________________________________________________________________
t
ON(MIN)
S
S
S
S
= 1100kHz
= 1450kHz
= external clock frequency
= 1220kHz ±120kHz
MODE
t
SW
1.2W, Low-EMI, Filterless,
Class D Audio Amplifier
The SYNC input allows the MAX9746 to be synchro-
nized to a system clock (allowing a fully synchronous
system), or allocating the spectral components of the
switching harmonics to insensitive frequency bands.
Applying an external TTL clock of 800kHz to 2MHz to
SYNC synchronizes the switching frequency of the
MAX9746. The period of the SYNC clock can be ran-
domized, enabling the MAX9746 to be synchronized to
another MAX9746 operating in SSM mode.
External Clock Mode
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