Green-Mode PWM Controller for Flyback Converter, 65KHz, Brown In/Out Protection

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Overview

The highly integrated FAN6604 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, FAN6604 saves PWM pulses by entering "deep" Burst Mode. Burst Mode enables the power supply to meet international power conservation requirements.
FAN6604 also integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimm line filters. The built-in synchronized slope compensation helps achieve stable peak-current control. Add in current limit to keep constant output power over universal AC input range. 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.
FAN6604 is available in an 8-pin SOP package.

  • LCD Monitor
  • LCD TV
  • Motion Control - Industrial Motor
  • High-Voltage Startup
  • AC Input Brownout Protection with Hysteresis
  • Line Compensation by Current Limit
  • Low Operating Current: 1.5 mA
  • Linearly Decreasing PWM Frequency to 22 kHz with Cycle Skipping
  • 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)
  • Internal Latch Circuit (OVP, OTP)
  • Programmable Over-Temperature Protection (OTP)
  • SENSE Short-Circuit Protection (SSCP)
  • Open-Loop Protection (OLP); Restart for FAN6604MRMX, Latch for FAN6604MLMX
  • Built-in 8 ms Soft-Start Function

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FAN6604MLMX

Obsolete

Pb

A

H

P

SOIC-8

1

260

REEL

2500

N

Flyback

1

Current Mode

16

18

65

Price N/A

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FAN6604MRMX

Last Shipments

Pb

A

H

P

SOIC-8

1

260

REEL

2500

N

Flyback

1

Current Mode

16

18

65

Price N/A

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