TSM1013(2016) Просмотр технического описания (PDF) - STMicroelectronics
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TSM1013
(Rev.:2016)
(Rev.:2016)
STMicroelectronics
TSM1013 Datasheet PDF : 14 Pages
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Principle of operation and application hints
TSM1013
Equation 4
Plim = Vsense x Ilim
Therefore, for most adapter and battery charger applications, a quarter-watt, or half-watt
resistor to make the current sensing function is sufficient.
The current sinking outputs of the two transconductance operational amplifiers are common
(to the output of the IC). This makes an ORing function which ensures that whenever the
current or the voltage reaches too high values, the optocoupler is activated.
The relation between the controlled current and the controlled output voltage can be
described with a square characteristic as shown in the following V/I output power graph.
Figure 4. Output voltage versus output current
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Compensation
The voltage control transconductance operational amplifier can be fully compensated. Both
of its output and negative input are directly accessible for external compensation
components.
An example of a suitable compensation network is shown in Figure 3. It consists of
a capacitor Cvc1 = 2.2 nF and a resistor Rcv1 = 22 K in series.
The current control transconductance operational amplifier can be fully compensated. Both
of its output and negative input are directly accessible for external compensation
components.
An example of a suitable compensation network is shown in Figure 3. It consists of
a capacitor Cic1 = 2.2 nF and a resistor Ric1 = 22 K in series.
8/14
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