TLE4305G Infineon

Voltage-Current Regulator TLE 4305 Features Wide supply voltage operation range Wide ambient temperature operation range Minimized external circuitry High voltage regulation accuracy High current limit regulation accuracy Low temperature drift Independent voltage- current-loop compensation Internal fixed amplification Fully temperature compensated current- and voltage OTA (operational transconductance amplifier) SMD package Industrial type Green Product (RoHS compliant) Functional Description The TLE 4305 G is specifically designed to control the output voltage and the output current of a switch mode power supply. Independent compensation networks for the voltage- and for the current-loop can be realized by external circuitry. The device contains a high accuracy bandgap reference voltage, two operational trans conductance amplifier (OTA), an opto-coupler driver output stage and an high-voltage bias circuit. The device is based on Infineons double isolated power line technology DOPL which allows to produce high precision bipolar voltage regulators with breakdown voltages up to 45 V. Type Package TLE 4305 G PG-DSO-8 Data Sheet 1 Rev. 2.2, 2008-11-17 TLE 4305 S 1 8 CRE VSE 2 7 VCO OUT 3 6 CCO CSE 4 5 GND AEP02887 Figure 1 Pin Configuration (top view) Table 1 Pin Definitions and Functions Pin No. Symbol Function 1S Supply voltage external blocking capacitor necessary (see Figure 4). 2 VSE Voltage Sense Input non inverting with respect to voltage compensation VCO internal compared with the high accuracy bandgap-reference (typ. 2.5 V). 3OUT Output NPN emitter follower output with an internal series resistor of 1 k controlled by the potential of VCO or CCO output voltage is internally clamped therefore the output current is internally limited. 4CSE Current Sense Input 1 connected to an internal voltage divider (reference to the inverting input of the current OTA see Figure 7). 5GND Ground reference potential unless otherwise specified. 6CCO Current Compensation Output internal series resistor to the current-OTA output (typ. 1 k ) amplification internal temperature compensated current loop compensation can be done by an external capacitor to GND. 7VCO Voltage Compensation Output internal series resistor to the voltage-OTA output (typ. 1 k ) amplification internal temperature compensated voltage loop compensation can be done by an external capacitor to GND. 8CRE Current-OTA Reference Input current sense reference input non inverting input of the current-OTA. Data Sheet 2 Rev. 2.2, 2008-11-17