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Fairchild Semiconductor Electronic Components Datasheet

FAN6862HR Datasheet

Highly Integrated Green-Mode PWM Controller

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FAN6862H / FAN6862HR
Highly Integrated Green-Mode PWM Controller
Features
Low Startup Current: 8µA
Low Operating Current in Green Mode: 2mA
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 (FAN6862H) for OVP, OTP
Fixed PWM Frequency (100KHz) with Frequency
Hopping
Feedback Open-Loop Protection with 56ms Delay
Soft Startup Time: 5ms
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, FAN6862H(HR)
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 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. This Green-Mode function
enables power supplies to meet international power
conservation requirements.
The FAN6862H(HR) is designed for SMPS and
integrates frequency-hopping function internally, which
helps reduce EMI emission of a power supply with
minimum line filters. The built-in synchronized slope
compensation is proprietary saw-tooth compensation for
constant output power limit over universal AC input
range. The gate output is clamped at 18V to protect the
external MOSFET from over-voltage damage.
Other protection functions include VDD Over-Voltage
Protection (OVP) and Over-Temperature Protection
(OTP). For over-temperature protection, 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.
Ordering Information
Part Number
FAN6862HTY
Operating
Temperature
Range
-40 to +105°C
FAN6862HRTY
-40 to +105°C
OVP OLP OTP/OTP2
Package
Latch A/R
Latch
Auto-Restart (A/R)
6-Pin, Super Small Outline
Package, SuperSOT™-6
6-Pin, Super Small Outline
Package, SuperSOT™-6
Packing
Method
Tape & Reel
Tape & Reel
© 2010 Fairchild Semiconductor Corporation
FAN6862H(HR) • Rev. 2, Feb-2020
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

FAN6862HR Datasheet

Highly Integrated Green-Mode PWM Controller

No Preview Available !

Typical Application
Figure 1. Typical Application
Block Diagram
VDD 5
OVP
VDD-OVP
OLP
OVP
OTP
Latch-Off Release
VDD-LH
Internal
BIAS
OLP
OVP
OTP
FAN6862H
Auto-
Recovery
Protection
Latch-Off
Protection
FAN6862HR
Auto-
Recovery
Protection
UVLO
16V/8.5V
OSC
Green
Mode
Controller
FB
GND
1
S
Q
R
Soft
Driver
VDD
VLIMIT_RAMP
(Include Soft-Start)
Slope
Compensation
2.5R
R
Blanking
Circuit
5.2V
6 GATE
4 SENSE
2 FB
RT 3
IRT
1V
0.7V
OTP1
Debounce
OTP2
Debounce
OTP
OLP
OLP
Delay
4.6V
Figure 2. Block Diagram
© 2010 Fairchild Semiconductor Corporation
FAN6862H(HR) • Rev. 2, Feb-2020
2
www.fairchildsemi.com


Part Number FAN6862HR
Description Highly Integrated Green-Mode PWM Controller
Maker Fairchild Semiconductor
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FAN6862HR Datasheet PDF






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