FAN6754

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Highly Integrated Green-Mode PWM Controller

General 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.

Product Status/Pricing/Packing

Product Product Status Eco Status *Pricing Package Type Leads Packing Method Package Drawing **Package Marking Convention RoHS IPC1752 RoHS/REACH/JIG Certificate of Compliance
FAN6754MLMY Not recommended for new design Green as of Oct 2009 $0.51 SO-8 8 TAPE REEL PDF Line 1:$Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code) &K
Line 2:6754ML
Line 3:MYB
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FAN6754MRMY Not recommended for new design Green as of Oct 2009 $0.51 SO-8 8 TAPE REEL PDF Line 1:$Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code) &K
Line 2:6754MR
Line 3:MYB
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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

  • TBA

Application Notes

Multilanguage - Chinese Multilanguage - English Multilanguage - Japanese Multilanguage - Korean