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دیتاشیت - Fairchild Semiconductor - Highly Integrated Green- Mode PWM Controller

شماره قطعه FAN6754A
شرح مفصل Highly Integrated Green- Mode PWM Controller
تولید کننده Fairchild Semiconductor 
آرم Fairchild Semiconductor 


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FAN6754A شرح
April 2012
FAN6754A
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: 1.5mA
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
SENSE Short-Circuit Protection (SSCP)
Built-in 8ms Soft-Start Function
Applications
General-purpose switch-mode power supplies and
flyback power converters, including:
Power Adapters
Description
The highly integrated FAN6754A 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,
FAN6754A saves PWM pulses by entering deep burst
mode. This burst mode function enables the power
supply to meet international power conservation
requirements.
FAN6754A 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. 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, SENSE pin short-circuit
protection, 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.
FAN6754A is available in an 8-pin SOP package.
Related Resources
Evaluation Board: FEBFAN6754AMR_CP450v1
Ordering Information
Part Number
FAN6754AMRMY
FAN6754AMLMY
Operating
Temperature Range
-40 to +105°C
Package
8-Pin, Small Outline Package (SOP)
Packing Method
Tape & Reel
© 2011 Fairchild Semiconductor Corporation
FAN6754A • Rev. 1.0.3
www.fairchildsemi.com

قانون اساسیصفحه 14
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