FAN6754MR Datasheet PDF – PWM Controller – Fairchild

Part Number: FAN6754MR

Function: Highly Integrated Green-Mode PWM Controller

Package: SOP 8 Pin Type

Manufacturer: Fairchild Semiconductor

Image:

FAN6754MR Image

 

Description

The highly integrated IC 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, The Device saves PWM pulses by entering deep burst mode. This burst mode function enables the power supply to meet international power conservation requirements.

The FAN6754MR 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.

Obsolete as of 25-Nov-2012

Block Diagram :

FAN6754MR datasheet

Features

1. High-Voltage Startup

2. AC Input Brownout Protection with Hysteresis

3. Monitor HV to Adjust VLimit

4. Low Operating Current: 1.7mA

5. Linearly Decreasing PWM Frequency to 22KHz

6. Frequency Hopping to Reduce EMI Emission

7. Fixed PWM Frequency: 65KHz

8. Peak-Current-Mode Control

9. Cycle-by-Cycle Current Limiting

10. Leading-Edge Blanking (LEB)

Applications:

1. General-purpose switch-mode power supplies and flyback power converters, including:

(1) Power Adapters

 

FAN6754MR Datasheet PDF

FAN6754MR pdf

Other data sheets are available within the file:  FAN6754, FAN6754MLMY, FAN6754MRMY