TS2007

Application information

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is also a tolerance around the typical value (see Table 5 to Table 9). With regard to the

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4.5

Decoupling of the circuit

The TS2007 has a typical switching frequency of 280kHz and output fall and rise time about

5ns. Due to these very fast transients, careful decoupling is mandatory.

A 1µF ceramic capacitor is enough, but it must be located very close to the TS2007 in order

to avoid any extra parasitic inductance created by a long track wire. Parasitic loop

inductance, in relation with di/dt, introduces overvoltage that decreases the global efficiency

of the device and may cause, if this parasitic inductance is too high, a TS2007 breakdown.

In addition, even if a ceramic capacitor has an adequate high frequency ESR value, its

current capability is also important. A 0603 size is a good compromise, particularly when a

4

Ω load is used.

Another important parameter is the rated voltage of the capacitor. A 1µF/6.3V capacitor

used at 5V, loses about 50% of its value. With a power supply voltage of 5V, the decoupling

THD+N in the medium to high frequency region, this capacitor variation becomes decisive.

In addition, less decoupling means higher overshoots which can be problematic if they reach

the power supply AMR value (6V).

4.6

When the standby is released to set the device ON, there is a wait of 5ms typically. The

TS2007 has an internal digital delay that mutes the outputs and releases them after this

time in order to avoid any pop noise.

Note:

The gain increases smoothly (see Figure 49) from the mute to the gain selected by the GS

pin (Section 4.2).

F

CL

1

2

π Z

in

C

in

⋅⋅

⋅

--------------------------------------------

=

C

in

1

2

π Z

in

F

CL

⋅⋅

⋅

----------------------------------------------

=

F

CLmax

1.103

F

CL

⋅

=

F

CLmin

0.915

F

CL

⋅

=