FSQ510_09

FSQ510, FSQ510H, and FSQ510M — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter January 2009 FSQ510, FSQ510H, and FSQ510M Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter – Low EMI and High Efficiency Features Uses an LDMOS Integrated Power Switch Optimized for Valley Switching Converter (VSC) Low EMI through Variable Frequency Control and Inherent Frequency Modulation High Efficiency through Minimum Drain Voltage Switching Extended Valley Switching for Wide Load Ranges Small Frequency Variation for Wide Load Ranges Advanced Burst-Mode Operation for Low Standby Power Consumption Pulse-by-Pulse Current Limit Protection Functions: Overload Protection (OLP), Internal Thermal Shutdown (TSD) with Hysteresis Under-Voltage Lockout (UVLO) with Hysteresis Internal Startup Circuit Internal High-Voltage SenseFET: 700V Built-in Soft-Start: 5ms Description A Valley Switching Converter (VSC) generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency. The FSQ510 (H or M) is an integrated valley switching pulse width modulation (VSPWM) controller and SenseFET specifically designed for offline switch-mode power supplies (SMPS) for valley switching with minimal external components. The VS-PWM controller includes an integrated oscillator, under-voltage lockout (UVLO), leading-edge blanking (LEB), optimized gate driver, internal soft-start, temperature-compensated precise current sources for loop compensation, and self-protection circuitry. Compared with discrete MOSFET and PWM controller solutions, the FSQ510 (H or M) can reduce total cost, component count, size and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a platform for cost-effective designs of a valley switching flyback converters. Applications Auxiliary Power Supplies for LCD TV, LCD Monitor, Personal Computer, and White Goods Ordering Information Output Power Table Operating Current RDS(ON) 230VAC ± 15%(2) Replaces Part 85-265VAC Junction Package Eco Limit (MAX) Devices Number Open Open (3) (3) Status Temperature Adapter (4) Adapter (4) Frame Frame FSQ510 7-DIP FSD210B FSQ510H FSQ510M 8-DIP 7-MLSOP (1) RoHS -40 to +130°C 320mA 32Ω 5.5W 9W 4W 6W FSD210DH FSD210BM For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. Notes: 1. The junction temperature can limit the maximum output power. 2. 230VAC or 100/115VAC with voltage doubler. 3. Typical continuous power with a Fairchild charger evaluation board described in this datasheet in a nonventilated, enclosed adapter housing, measured at 50°C ambient temperature. 4. Maximum practical continuous power for auxiliary power supplies in an open-frame design at 50°C ambient temperature. © 2009 Fairchild Semiconductor Corporation FSQ510, FSQ510H, and FSQ510M • Rev. 1.3.0 www.fairchildsemi.com FSQ510, FSQ510H, and FSQ510M — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter Application Circuit Vo AC IN Vstr D Sync VS -PWM Vfb GND Vcc Figure 1. Typical Application Circuit Internal Block Diagram Sync 4 (3) 200 ns delay VCC 5 (7) Vstr 8 (1) D 7 (8) VREF VREF IFB 0.7V / 0.1V OSC S R UVLO 8.7V / 6.7V VREF Idelay Vfb 3 (2) 6R R Q 360ns LEB Rsense 0.85V / 0.75V S/S 5ms TSD A/R S Q R (0.4V) OLP 4.7V n(m):n stands for the pin number of 7-DIP and 7-MLSOP m stands for the pin number of 8-DIP 1,2 (4,5,6) GND Figure 2. Internal Block Diagram © 2009 Fairchild Semiconductor Corporation FSQ510, FSQ510H, and FSQ510M • Rev. 1.3.0 www.fairchildsemi.com 2 FSQ510, FSQ510H, and FSQ510M — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter Pin Assignments Vstr Vfb D Vcc FSQ510H Sync GND GND GND Figure 3. Package Diagrams for FSQ510(M) and FSQ510H Pin Definitions 7-Pin 1, 2 8-Pin 4, 5, 6 Name GND Description This pin is the control ground and the SenseFET source. This pin is internally connected to the inverting input of the PWM comparator. The collector of an opto-coupler is typically tied to this pin. For stable operation, a capacitor should be placed between this pin and GND. If the voltage of this pin reaches 4.7V, the overload protection triggers, which shuts down the FPS. This pin is internally connected to the sync-detect comparator for valley switching. In normal valley-switching operation, the threshold of the sync comparator is 0.7V/0.1V. This pin is the positive supply input. This pin provides internal operating current for both startup and steady-state operation. High-voltage power SenseFET drain connection. This pin is connected directly, or through a resistor, to the highvoltage DC link. At startup, the internal high-voltage current source supplies internal bias and charges the external capacitor connected to the VCC pin. Once VCC reaches 8.7V, the internal current source is disabled. 3 2 Vfb 4 5 7 3 7 8 Sync VCC D 8 1 Vstr © 2009 Fairchild Semiconductor Corporation FSQ510, FSQ510H, and FSQ510M • Rev. 1.3.0 www.fairchildsemi.com 3 FSQ510, FSQ510H, and FSQ510M — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter 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 VSTR VDS VCC VFB VSync PD Vstr Pin Voltage Drain Pin Voltage Supply Voltage Parameter Min. Max. 500 700 20 Internally (5) Clamped 6.5 1.38 1.47 +150 Unit V V V V V W Feedback Voltage Range Sync Pin Voltage 7-DIP Total Power Dissipation 7-MLSOP 8-DIP Maximum Junction Temperature -0.3 -0.3 TJ TSTG Recommended Operating Junction (6) Temperature Storage Temperature -40 -55 +140 +150 °C °C Notes: 5. VFB is internally clamped at 6.5V (ICLAMP_MAX