CCM PFC + PWM Combination Controller

Favorite

Overview

The highly integrated FAN4800A/C and FAN4801/02/02L 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, FAN4800A/C and FAN4801/02/02L have lower operation current that save power consumption in external devices. FAN4800A/C and FAN4801/02/2L have accurate 49.9% maximum duty of PWM that makes the hold-up time longer. Brownout protection and PFC soft-start functions are not in ML4800 and FAN4800. To evaluate FAN4800A/C, FAN4801/02/02L for replacing existing FAN4800 and ML4800 boards, five things must be done before the fine-tuning procedure: 1. Change RAC resister from the old value to a higher resister: between 6MΩto 8MΩ. 2. Change RT/CT pin from the existing values to RT=6.8KΩand CT=1000pF to have fPFC=64KHz, fPWM=64KHz. 3. VRMS pin needs to be 1.224V at VIN=85 VAC for universal input application from line input from 85VAC to 270 VAC. Both poles for the Vrms of FAN4801/02/02L don’t need to substantially slower than FAN4800; about 5 to 10 times. 4. At full load, the average VEA needs to ~4.5V and the ripple on the VEA needs to be less than 400mV. 5. Soft-Start pin, the soft-start current has been reduced to half from the FAN4800 capacitor.

  • AC-DC Merchant Power Supply - Desktop PC
  • AC-DC Merchant Power Supply
  • AC-DC Merchant Power Supply - Servers & Workstations
  • Fully Configured Entry Level PC Server
  • Desktop PC
  • PC Server
  • Server
  • Workstation
  • Pin-to-Pin Compatible with ML4800 and FAN4800 and CM6800 and CM6800A
  • PWM Configurable for Current-mode or Feed-forward 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 PWM
  • Power-On Sequence Control and Soft-Start
  • Brownout Protection
  • Interleaved PFC/PWM Switching
  • FAN4801/02/02L Improve Efficiency at Light Load
  • fRTCT=4
  • fPFC=4
  • fRTCT=4
  • fPWM for FAN4800A and FAN4801
  • fPWM for FAN4800C and FAN4802/02L
  • fPFC=2

Product List

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

Search

Close Search

Products:

1

Share

Product Groups:

Orderable Parts:

1

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

FAN4801NY

Loading...

Last Shipments

CAD Model

Pb

A

H

P

PDIP-16

NA

0

TUBE

1500

N

CCM

-

-

-

-

12

-

-

-

-

-

Price N/A

More Details

Show More

1-25 of 25

Products per page

Jump to :