TS1052CX6 RFG Taiwan Semiconductor, TS1052CX6 RFG Datasheet - Page 5

• Manufacturer Part Number: TS1052CX6 RFG
• Description: Current & Power Monitors & Regulators Constant voltage and current controller
• Manufacturer: Taiwan Semiconductor

Specifications of TS1052CX6 RFG

• Rohs: yes
• Product: Current Monitors
• Supply Voltage - Max: 18 V
• Supply Voltage - Min: 2.5 V
• Input Voltage Range: 2.5 V to 18 V

TS1052
Constant Voltage and Constant Current Controller
For Battery Chargers and Adaptors
Principle of Operation and Application Hints (continues)
Compensation
The voltage control trans-conductance operational amplifier can be fully compensated. Both of its output and
negative input are directly accessible for external compensation components.
And example of a suitable compensation network is shown in typical application circuit. It consists of a capacitor
Cvc1=2.2nF and a resistor Rcv1=470K
in series, connected in parallel with another capacitor Cvc2=22pF.
The current control trans-conductance operational amplifier can be fully compensated. Both of its output and
negative input are directly accessible for external compensation components. An example of suitable
compensation network is shown in typical application circuit. It consists of a capacitor Cic1=2.2nF and resistor
Ric1=22K
in series. When the Vcc voltage reaches 18V it could be interesting to limit the current coming through
the output in the aim to reduce the dissipation of the device and increase the stability performances of the whole
application. An example of suitable Rout value could be 330 in series with the optocoupler in case Vcc=12V.
Start Up and Short Circuit Conditions
The TS1052 is not provided with a high enough supply voltage in under start-up or short-circuit conditions. This is
due to the fact that the chip has its power supply line in common with the power supply line of the system.
Therefore, the current limitation can only be ensured by the primary PWM module, which should be chosen
accordingly. If the Primary current limitation is considered not to be precise enough for the application, then a
sufficient supply for the TS1052 has to be ensured under any condition. It would then be necessary to add some
circuitry to supply the chip with separate power line. This can be achieved in numerous ways, including an
additional winding on the transformer. The following schematic shows how to realize a low-cost power supply for
the TS1052 (with no additional windings). Please pay attention to the fact that in the particular case presented here,
this low-cost power supply can reach voltages as high as twice the voltage of the regulated line. Since the absolute
maximum rating of the TS1052 supply voltage is 18V, this low-cost auxiliary power supply can only be used in
applications where the regulated line voltage does not exceed 9V.
TS1052
5/8
Version: A12