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FAN6756— mWSaver™ PWM Controller
January 2013
FAN6756— mWSaver™ PWM Controller
Features
Single-Ended Topologies, such as Flyback and
Forward Converters
mWSaver™ Technology
Description
The FAN6756 is a next-generation Green Mode PWM
controller with innovative mWSaver™ technology, which
dramatically reduces standby and no-load power
consumption, enabling compliance with worldwide
Standby Mode efficiency guidelines.
An innovative AX-CAP
®
method minimizes losses in the
EMI filter stage by eliminating the X-cap discharge
resistors
while
meeting
IEC61010-1
safety
requirements. “Deep” Burst Mode clamps feedback
voltage and modulates feedback impedance with an
impedance modulator during Burst Mode operation,
which forces the system to operate in a Deep Burst
Mode with minimum switching losses.
Protections ensure safe operation of the power system
in various abnormal conditions. A proprietary frequency-
hopping function decreases EMI emission and built-in
synchronized slope compensation allows more stable
Peak-Current-Mode control over a wide range of input
voltage and load conditions. The proprietary internal line
compensation ensures constant output power limit over
the entire universal line voltage range.
Requiring a minimum number of external components,
FAN6756 provides a basic platform that is well suited for
cost-effective flyback converter designs that require
extremely low standby power consumption.
-
Achieves Low No-Load Power Consumption:
< 30 mW at 230 V
AC
(EMI Filter Loss Included)
-
Eliminates X
®
Capacitor Discharge Resistor Loss
with AX-CAP Technology
-
Linearly Decreases Switching Frequency to
23 kHz
-
Burst Mode Operation at Light-Load Condition
-
Impedance Modulation in “Deep” Burst Mode
-
Low Operating Current (450 µA) in Deep Burst
Mode
-
500 V High-Voltage JFET Startup Circuit to
Eliminate Startup Resistor Loss
Highly Integrated with Rich Features
-
Proprietary Frequency Hopping to Reduce EMI
-
High-Voltage Sampling to Detect Input Voltage
-
Peak-Current-Mode Control with Slope
Compensation
-
Cycle-by-Cycle Current Limiting with Line
Compensation
-
Leading Edge Blanking (LEB)
-
Built-In 7 ms Soft-Start
Advanced Protections
Applications
Flyback power supplies that demand extremely low
standby power consumption, such as:
-
Brown-in / Brownout Recovery
-
Internal Overload / Open-Loop Protection (OLP)
-
V
DD
Under-Voltage Lockout (UVLO)
-
V
DD
Over-Voltage Protection (V
DD
OVP)
-
Over-Temperature Protection (OTP)
-
Current-Sense Short-Circuit Protection (SSCP)
Adapters for Notebooks, Printers, Game Consoles,
etc.
Open-Frame SMPS for LCD TV, LCD Monitors,
Printer Power, etc.
Related Resources
Evaluation Board: FEBFAN6756MR_T03U065A
Ordering Information
Part Number
FAN6756MRMY
FAN6756MLMY
Protections
(1)
OLP OVP OTP SSCP
A/R
L
L
L
L
L
A/R
A/R
Operating
Temperature Range
-40 to +105°C
Package
Packing
Method
8-Pin, Small Outline
Tape & Reel
Package (SOP)
Note:
1. A/R = Auto Recovery Mode protection, L = Latch Mode protection.
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