Power Factor Controller (PFC) CCM + PWM Controller, with Surge Capability Enhancement

Favorite

Overview

The highly integrated FAN4800AS/CS/01S/02S parts are specially designed for power supplies that consist of boost PFC and PWM. They require very few external components to achieve versatile protections / compensation. They are available in 16-pin DIP and SOP packages.
The PWM can be used in either current or voltage mode. In voltage mode, feed-forward from the PFC output bus can reduce the secondary output ripple.
Compared with older productions, ML4800 and FAN4800, FAN4800AS/CS/01S/02S have lower operation current that saves power consumption in external devices. FAN4800AS/CS/01S/02S have accurate 49.9% maximum duty of PWM that makes the hold-up time longer. Brownout protection and PFC soft-start functions available in this series are not available in ML4800 and FAN4800.

To evaluate FAN4800AS/CS/01S/02S for replacing existing FAN4800 and ML4800 boards, five things must be completed before the fine-tuning procedure:
1. Change RAC resister from the old value to a higher resister: between 6 MΩ to 8 MΩ.
2. Change RT/CT pin from the existing values to RT=6.8 kΩ and CT=1000 pF to have fPFC=64 kHz and fPWM=64 kHz.
3. The VRMS pin needs to be 1.224 V at VIN=85 VAC for universal input application from line input from 85 VAC to 270 VAC.
4. At full load, the average VVEA needs to be ~4.5 V and the ripple of VVEA needs to be less than 400 mV.
5. For the Soft-Start pin, the soft-start current has been reduced to half the FAN4800 capacitor.

There are two differences from FAN4800A/C/01/02 to FAN4800AS/CS/01S/02S:
1. Under-voltage protection debounce time is extended to one second.
2. PWM gate clamp voltage is raised to 19 V.

  • Desktop PC
  • LCD TV
  • LCD Monitor
  • Distribution
  • Pin-to-Pin Compatible with ML4800 and FAN4800 and CM6800 and CM6800A
  • PWM Configurable for Current Mode or Feedforward Voltage-Mode Operation
  • Internally Synchronized Leading-Edge PFC and Trailing-Edge PWM in One IC
  • Low Operating Current
  • Innovative Switching-Charge Multiplier Divider
  • Average-Current Mode for Input-Current Shaping
  • PFC Over-Voltage and Under-Voltage Protections
  • PFC Feedback Open-Loop Protection
  • Cycle-by-Cycle Current Limiting for PFC/PWM
  • Power-on Sequence Control and Soft-Start
  • Brownout Protection
  • Interleaved PFC/PWM Switching
  • Improved Efficiency at Light Load
  • fRTCT=4xfPFC=4xfPWM for FAN4800AS/01S
  • fRTCT=4xfPFC=2xfPWM for FAN4800CS/02S

Product List

If you wish to buy products or product samples, please log in to your onsemi account.

Search

Close Search

Products:

2

Share

Product Groups:

Orderable Parts:

2

Product

Status

CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

PFC Mode

Frequency Operation

Control Mode

Topology

fSW Typ (kHz)

VCC Max (V)

Drive Cap. (mA)

UVLO (V)

Latch

UVP

Inhibition

Reference Price

FAN4802SMY

Loading...

Obsolete

CAD Model

Pb

A

H

P

SOIC-16

3

260

REEL

2500

N

CCM

Fixed

Current Mode

Step-Up

64

30

470 / 550

11

No

Yes

No

Price N/A

More Details

FAN4802SNY

Loading...

Obsolete

CAD Model

Pb

A

H

P

PDIP-16

NA

0

TUBE

1500

N

CCM

Fixed

Current Mode

Step-Up

64

30

470 / 550

11

No

Yes

No

Price N/A

More Details

Show More

1-25 of 25

Products per page

Jump to :