FAN103MY

FAN103 — Primary-Side-Regulation PWM Controller (PWM-PSR) March 2010 FAN103 Primary-Side-Regulation PWM Controller (PWM-PSR) Features Low Standby Power Under 30mW High Voltage Startup Fewest External Component Counts Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry Green-Mode Function: Linearly-Decreasing PWM Frequency Fixed PWM Frequency at 50kHz with Frequency Hopping to Solve EMI Problem Cable Compensation in CV Mode Peak-Current-Mode Control in CV Mode Cycle-by-Cycle Current Limiting VDD Over-Voltage Protection with Auto Restart VDD Under-Voltage Lockout (UVLO) Gate Output Maximum Voltage Clamped at 15V Fixed Over-Temperature Protection with Auto Restart Available in the 8-Lead SOP Package Description This third-generation Primary-Side-Regulation (PSR) and highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology, TURECURRENT™, of FAN103 enables precise CC regulation and simplified circuit for battery charger applications. A low-cost, smaller and lighter charger results as compared to a conventional design or a linear transformer. To minimize standby power consumption, the proprietary green-mode function provides off-time modulation to linearly decrease PWM frequency under light-load conditions. This green mode assists the power supply in meeting the power conservation requirement. By using the FAN103, a charger can be implemented with few external components and minimized cost. A typical output CV/CC characteristic envelope is shown in Figure 1. VO Maximum Minimum Before Cable Compensation After Cable Compensation Applications Battery chargers for cellular phones, cordless phones, PDA, digital cameras, power tools, etc. Replaces linear transformer and RCC SMPS IO Figure 1. Typical Output V-I Characteristic Ordering Information Part Number FAN103MY Operating Temperature Range -40°C to +105°C Eco Status Green Package 8-Lead, Small Outline Package (SOP-8) Packing Method Tape & Reel For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html © 2010 Fairchild Semiconductor Corporation FAN103 • Rev. 1.0.3 www.fairchildsemi.com FAN103 — Primary-Side-Regulation PWM Controller (PWM-PSR) Application Diagram Rsn L1 Rsn2 D1 RF AC Input D2 D3 C1 C2 D4 Rsn1 CVDD DFa CVS R1 R2 MOSFET Csn2 T1 Csn Dsn DF CO1 CO2 Rd DC Output 3 VDD 7 N.C 8 HV 6 GND VS 5 GATE 2 CS 1 COMR 4 RGATE Rcs RSENSE CCR Figure 2. Typical Application Internal Block Diagram Figure 3. Functional Block Diagram © 2010 Fairchild Semiconductor Corporation FAN103 • Rev. 1.0.3 www.fairchildsemi.com 2 FAN103 — Primary-Side-Regulation PWM Controller (PWM-PSR) Marking Information F: Fairchild Logo Z: Plant Code X: 1-Digit Year Code Y: 1-Digit Week Code TT: 2-Digit Die Run Code T: Package Type (M=SOP) P: Y=Green Package M: Manufacture Flow Code Figure 4. Top Mark Pin Configuration Figure 5. Pin Configuration Pin Definitions Pin # 1 2 3 4 5 6 7 8 Name CS GATE VDD COMR VS GND NC HV Description Current Sense. This pin connects a current sense resistor, to detect the MOSFET current for peak-current-mode control in CV mode, and provides the output-current regulation in CC mode. PWM Signal Output. This pin uses the internal totem-pole output driver to drive the power MOSFET. It is internally clamped below 15V. Power Supply. IC operating current and MOSFET driving current are supplied using this pin. This pin is connected to an external VDD capacitor of typically 10µF. The threshold voltages for startup and turn-off are 16V and 5V, respectively. The operating current is lower than 5mA. Cable Compensation. This pin connects a capacitance between the COMR and GND pins for compensation voltage drop due to output cable loss in CV mode. Voltage Sense. This pin detects the output voltage information and discharge time based on voltage of auxiliary winding. Ground No Connect High Voltage. This pin connects to bulk capacitor for high-voltage startup. © 2010 Fairchild Semiconductor Corporation FAN103 • Rev. 1.0.3 www.fairchildsemi.com 3 FAN103 — Primary-Side-Regulation PWM Controller (PWM-PSR) Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol VHV VVDD VVS VCS VCOMV VCOMI PD θJA θJC TJ TSTG TL HV Pin Input Voltage DC Supply Voltage (1)(2) Parameter Min. Max. 500 30 Unit V V V V V V mW °C/W °C/W °C °C °C VS Pin Input Voltage CS Pin Input Voltage Voltage Error Amplifier Output Voltage Current Error Amplifier Output Voltage Power Dissipation (TA68.17% at Full Load) Meeting EPS 2.0 Regulation with Enough Margin Low standby (Pin