FAN604
Offline Quasi-Resonant PWM
Controller
The FAN604 is an advanced PWM controller aimed at achieving power
density of ≥10W/in3 in universal input range AC/DC flyback isolated
power supplies. It incorporates Quasi-Resonant (QR) control with
proprietary Valley Switching with a limited frequency variation. QR
switching provides high efficiency by reducing switching losses while
Valley Switching with a limited frequency variation bounds the frequency
band to overcome the inherent limitation of QR switching.
FAN604 features mWSaver® burst mode operation with extremely low
operating current (300 μA) and significantly reduces standby power
consumption to meet the most stringent efficiency regulations such as
Energy Star’s 5-Star Level and CoC Tier II specifications.
www.onsemi.com
MARKING DIAGRAM
10
ZXYTT
604
TM
FAN604 includes several user configurable features aimed at optimizing
efficiency, EMI and protections. FAN604 has a wide blanking frequency
range that improves light load efficiency and eliminating audio noise for
adaptive application. It incorporates user-configurable constant current
reference, which allows controlling the maximum output current from
primary-side, thereby optimizing transformer design to improve the
overall efficiency. It also includes several rich programmable protection
features such as over-voltage protection (OVP), precise constant output
current regulation (CC).
1
Z: Assembly Plant Code
X: Year Code
Y: Week Code
TT: Die Run Code
T: Package Type (M=SOIC)
M: Manufacture Flow Code
PIN CONNECTIONS
Features
Higher Average Efficiency by Quasi-Resonant Switching Operation
with Wide Blanking Time Range
HV
1
2
3
4
5
10 GND
NC
CS
9
8
7
6
FB
Wide Input and Output Conditions Achieve High Power Density
Power Supply
FAN604MX
SD
Optimization Transformer Design for Adaptive Charger
Application
User Configurable Constant Current Reference (CCR) to Limit
the Maximum Output Current
Precise Constant Output Current Regulation with Programmable
Line Compensation
GATE
VDD
CCR
VS
(Top View)
ORDERING INFORMATION
mWSaver® Technology for Ultra Low Standby Power Consumption
(<20 mW)
See detailed ordering and shipping information in the
package dimensions section on page 20 of this data sheet.
Forced and Inherent Frequency Modulation of Valley Switching for
Low EMI Emissions and Common Mode Noise
Built-In and User Configurable Over-Voltage Protection (OVP),
Under-Voltage Protection (UVP) and Over-Temperature Protection
(OTP)
Programmable Over-Temperature-Protection through External NTC
Resistor
Fully Programmable Brown-In and Brownout Protection
Built-In High-Voltage Startup to Reduce External Components
Typical Applications
Battery Charges for Smart Phones, Feature Phones, and Tablet PCs
AC-DC Adapters for Portable Devices or Battery Chargers that
Require CV/CC Control
© Semiconductor Components Industries, LLC, 2013
1
Publication Order Number:
March 2017- Rev. P0
FAN604
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