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FAN6863WRTY データシート(PDF) 1 Page - Fairchild Semiconductor

部品番号 FAN6863WRTY
部品情報  Highly Integrated Green-Mode PWM Controller
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メーカー  FAIRCHILD [Fairchild Semiconductor]
ホームページ  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

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May 2012
© 2011 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN6863W • Rev. 1.0.1
FAN6863W
Highly Integrated Green-Mode PWM Controller
Features
Low Standby Power: Under 0.1W
Low Startup Current: 8µA
Low Operating Current in Green Mode: 600µA
Peak-Current Mode Operation with Cycle-by-Cycle
Current Limiting
PWM Frequency Continuously Decreasing with
Burst Mode at Light Loads
VDD Over-Voltage Protection (OVP)
Constant Output Power Limit (Full AC Input Range)
Internal Latch Circuit (FAN6863WL) for OVP, OTP
SENSE Pin Short-Circuit Protection (SSCP)
Fixed PWM Frequency (65KHz) with Frequency
Hopping
Feedback Open-Loop Protection: 60ms Delay
GATE Output Maximum Voltage Clamp: 13.5V
Soft-Start Time: 5ms
Soft Driving for EMI Improvement
Full Range Frequency Hopping
Internal OTP Sensor with Hysteresis
Gate Driving Capability: 400mA
Applications
General-purpose switched-mode power supplies and
flyback power converters, including:
Power Adapters
Open-Frame SMPS
SMPS with Surge-Current Output, such as for
Printers, Scanners, Motor Drivers
Description
A highly integrated PWM controller, FAN6863W
provides several features to enhance the performance
of flyback converters. To minimize standby power
consumption, a proprietary Green Mode provides off-
time modulation to continuously decrease the switching
frequency under light-load conditions. Under zero-load
conditions, the power supply enters Burst Mode, which
completely shuts off PWM output. Output restarts just
before the supply voltage drops below the UVLO lower
limit. Green Mode enables power supplies to meet
international power conservation requirements.
The FAN6863W is designed for SMPS and integrates a
frequency-hopping function that helps to reduce EMI
emission of a power supply with minimum line filters. To
compensate the power limit variation over universal
input range, a current limit (VLIMIT) adaptively keeps the
power limit substantially constant. The gate output is
clamped at 13.5V to protect the external MOSFET from
over-voltage damage.
Other protection functions include SENSE pin Short-
Circuit Protection (SSCP), VDD Over-Voltage Protection
(OVP), and Over-Temperature Protection (OTP). For
OTP, an external NTC thermistor can be applied to
sense the ambient temperature. When VDD OVP or OTP
is activated, an internal latch circuit latches off the
controller. Protection types are shown in Table 1.
Table 1. Protection Type
Part Number
OVP OLP OTP / OTP2 SSCP
FAN6863W
Latch
A/R
Latch
A/R
FAN6863WL
Latch Latch
Latch
A/R
FAN6863WR
A/R
A/R
A/R
A/R
Ordering Information
Part Number
Operating
Temperature Range
Package
Packing Method
FAN6863WTY
-40 to +105°C
6-Lead, SuperSOT™-6, JEDEC M0-193,
1.6mm Wide
Tape & Reel
FAN6863WLTY
FAN6863WRTY


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