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©SiFirst Technology - 1 - Confidential SiFirst_DS_100_V1.0 SFL100
FEATURES
◆ Secondary Side Constant Voltage (CV) and Constant Current (CC) Control ◆ Wide VCC Operating Range (3.3V to 36V) ◆ Trimmed 1% Internal Voltage Reference ◆ Wired or Open-Drain Output Stages ◆ Low External Component Count ◆ Low Supply Current: 0.5mA ◆ Easy Frequency Compensation ◆ Operating Temperature Range: -40 to 125℃
APPLICATIONS
◆ Battery chargers ◆ Adaptors ◆ AC/DC LED lighting GENERAL DESCRIPTION SFL100 is a highly integrated solution for SMPS applications requiring a dual control loop to perform CV (constant voltage) and CC (constant current) regulation. SFL100 has wide VCC operating range (3.3V to 36V). The IC integrates a 1.21V voltage reference with ± 1% accuracy, two Op-Amps (with OR-d open drain outputs), and a low side current sensing circuit. The voltage reference, along with one Op-Amp, is the core of the voltage control loop; the current sensing circuit and the other Op-Amp make up the current control loop SFL100 is available in SOT23-6 packages. TYPICAL APPLICATION Vctrl VCC 1.21V Ictrl OUT GND Vsense 200mV Constant Voltage and Constant Current Controller SiFirst Confidential
©SiFirst Technology - 2 - Confidential SiFirst_DS_100_V1.0 SFL100 Pin Configuration
Ordering Information
Part Number Top Mark Package Tape & Reel SFL100LGT .00YWW SOT23-6 Green Yes Marking Information Pin Description Pin Num Pin Name I/O Description 1 Vctrl I Inverting input of the voltage loop Op-amp. 2 GND P IC ground. 3 OUT O Common open-drain output of the two internal Op-amps. This pin is able to sink current only, can be connected to the branch of the opto-coupler’s photodiode to transmit the error signal to the primary side. 4 Ictrl I Non-inverting input of the current loop Op-amp. 5 Vsense I Inverting input of the current loop Op-amp. 6 VCC P IC power supply pin. Absolute Maximum Ratings (Note 1) Parameter Value Unit VCC DC Supply Voltage 36 V OUT voltage range -0.3 to VCC V Vsense, Vctrl, Ictrl, voltage range -0.3 to 18 V Package Thermal Resistance (SOT-26) 250 oC/W Maximum Junction Temperature 150 oC Operating Temperature Range -40 to 85 oC Storage Temperature Range -65 to 150 oC Lead Temperature (Soldering, 10sec.) 260 oC ESD Capability, HBM (Human Body Model) 3 kV ESD Capability, MM (Machine Model) 250 V SiFirst Confidential