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FAN6754WAMLMY 数据表(PDF) 1 Page - Fairchild Semiconductor |
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FAN6754WAMLMY 数据表(HTML) 1 Page - Fairchild Semiconductor |
1 / 15 page Febuary 2013 © 2011 Fairchild Semiconductor Corporation 1 www.fairchildsemi.com FAN6754WA • Rev. 1.0.6 FAN6754WA Highly Integrated Green-Mode PWM Controller Brownout and VLimit Adjustment by HV Pin Features High-Voltage Startup AC Input Brownout Protection with Hysteresis Monitor HV to Adjust VLimit Low Operating Current: 1.5 mA Linearly Decreasing PWM Frequency to 22 kHz Frequency Hopping to Reduce EMI Emission Fixed PWM Frequency: 65 kHz Peak-Current-Mode Control Cycle-by-Cycle Current Limiting Leading-Edge Blanking (LEB) Internal Open-Loop Protection GATE Output Maximum Voltage Clamp: 13 V VDD Under-Voltage Lockout (UVLO) VDD Over-Voltage Protection (OVP) Programmable Over-Temperature Protection (OTP) Internal Latch Circuit (OVP, OTP) Open-Loop Protection (OLP); Restart for FAN6754WAMRMY, Latch for FAN6754WAMLMY SENSE Short-Circuit Protection (SSCP) Built-in 8 ms Soft-Start Function Applications General-purpose switch-mode power supplies (SMPS) and flyback power converters, including: Power Adapters Description The highly integrated FAN6754WA PWM controller provides several features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary Green-Mode function provides off-time modulation to continuously decrease the switching frequency under light-load conditions. Under zero-load and very light-load conditions, FAN6754WA saves PWM pulses by entering "deep" Burst Mode. Burst Mode enables the power supply to meet international power conservation requirements. FAN6754WA also integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimum line filters. The built-in synchronized slope compensation helps achieve stable peak-current control. To keep constant output power limit over universal AC input range, the current limit is adjusted according to AC line voltage detected by the HV pin. The gate output is clamped at 13 V to protect the external MOSFET from over-voltage damage. Other protection functions include AC input brownout protection with hysteresis, sense pin short-circuit protection, and VDD over-voltage protection. For over- temperature protection, an external NTC thermistor can be applied to sense the external switcher’s temperature. When VDD OVP or OTP are activated, an internal latch circuit is used to latch-off the controller. The Latch Mode is reset when the VDD supply is removed. FAN6754WA is available in an 8-pin SOP package. Ordering Information Part Number Operating Temperature Range Package Packing Method FAN6754WAMRMY -40 to +105°C 8-Pin, Small Outline Package (SOP) Tape & Reel FAN6754WAMLMY |
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