Datenblatt-Suchmaschine für elektronische Bauteile |
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FAN6754MRMY Datenblatt(PDF) 1 Page - Fairchild Semiconductor |
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FAN6754MRMY Datenblatt(HTML) 1 Page - Fairchild Semiconductor |
1 / 14 page December 2009 © 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6754 • Rev. 1.0.1 FAN6754 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: 1.7mA Linearly Decreasing PWM Frequency to 22KHz Frequency Hopping to Reduce EMI Emission Fixed PWM Frequency: 65KHz Peak-Current-Mode Control Cycle-by-Cycle Current Limiting Leading-Edge Blanking (LEB) Internal Open-Loop Protection GATE Output Maximum Voltage Clamp: 13V 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 MR, Latch for ML Built-in 8ms Soft-Start Function Internal OTP Sensor with Hysteresis Applications General-purpose switch-mode power supplies and flyback power converters, including: Power Adapters Description The highly integrated FAN6754 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, FAN6754 saves PWM pulses by entering deep burst mode. This burst mode function enables the power supply to meet international power conservation requirements. FAN6754 integrates a frequency-hopping function internally to reduce EMI emission of a power supply with minimum line filters. Built-in synchronized slope compensation is accomplished by proprietary HV monitor to adjust VLimit for constant output power limit over universal AC input range. Also, the gate output is clamped at 13V to protect the external MOSFET from over-voltage damage. Other protection functions include AC input brownout protection with hysteresis 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. FAN6754 is available in an 8-pin SOP package. Ordering Information Part Number Operating Temperature Range Eco Status Package Packing Method FAN6754MRMY -40 to +105°C Green 8-Pin, Small Outline Package (SOP) Tape & Reel FAN6754MLMY For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. |
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