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FAN6754MRMY Fiches technique(PDF) 1 Page - Fairchild Semiconductor

No de pièce FAN6754MRMY
Description  Highly Integrated Green- Mode PWM Controller
Download  14 Pages
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN6754MRMY Fiches technique(HTML) 1 Page - Fairchild Semiconductor

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December 2009
© 2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN6754 • Rev. 1.0.1
FAN6754
Highly Integrated Green- Mode PWM Controller
Brownout and VLimit Adjustment by HV Pin
Features
High-Voltage Startup
AC Input Brownout Protection with Hysteresis
Monitor HV to Adjust VLimit
Low Operating Current: 1.7mA
Linearly Decreasing PWM Frequency to 22KHz
Frequency Hopping to Reduce EMI Emission
Fixed PWM Frequency: 65KHz
Peak-Current-Mode Control
Cycle-by-Cycle Current Limiting
Leading-Edge Blanking (LEB)
Internal Open-Loop Protection
GATE Output Maximum Voltage Clamp: 13V
VDD Under-Voltage Lockout (UVLO)
VDD Over-Voltage Protection (OVP)
Programmable Over-Temperature Protection (OTP)
Internal Latch Circuit (OVP, OTP)
Open-Loop Protection (OLP); Restart for MR, Latch
for ML
Built-in 8ms Soft-Start Function
Internal OTP Sensor with Hysteresis
Applications
General-purpose switch-mode power supplies and
flyback power converters, including:
Power Adapters
Description
The highly integrated FAN6754 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,
FAN6754 saves PWM pulses by entering deep burst
mode. This burst mode function enables the power
supply to meet international power conservation
requirements.
FAN6754 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.
FAN6754 is available in an 8-pin SOP package.
Ordering Information
Part Number
Operating
Temperature
Range
Eco
Status
Package
Packing Method
FAN6754MRMY
-40 to +105°C
Green
8-Pin, Small Outline Package (SOP)
Tape & Reel
FAN6754MLMY
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.


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