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Rectifier Controller. FAN6248LD Datasheet

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Rectifier Controller. FAN6248LD Datasheet
















FAN6248LD Controller. Datasheet pdf. Equivalent













Part

FAN6248LD

Description

Advanced Synchronous Rectifier Controller



Feature


FAN6248HC/HD/LC/LD Advanced Synchronous Rectifier Controller for LLC Resonant Converter The FAN6248 is an advanced sy nchronous rectifier (SR) controller tha t is optimized for LLC resonant convert er topology with minimum external compo nents. It has two driver stages for dri ving the SR MOSFETs which are rectifyin g the outputs of the secondary transfor mer windings. The .
Manufacture

ON Semiconductor

Datasheet
Download FAN6248LD Datasheet


ON Semiconductor FAN6248LD

FAN6248LD; two gate driver stages have their own se nsing inputs and operate independently of each other. The adaptive parasitic i nductance compensation function minimiz es the body diode conduction maximizing the efficiency. The advanced control a lgorithm allows stable SR operation ove r entire load range. According to the o perating frequency and turn-off thresho ld voltage, FAN624.


ON Semiconductor FAN6248LD

8 has four different versions − FAN624 8HCMX, FAN6248HDMX, FAN6248LCMX, FAN624 8LDMX. Features • Highly Integrated S elf-contained Control of Synchronous Re ctifier with a Minimum External Compone nt Count • Optimized for LLC Resonant Converter • Anti Shoot-through Contr ol for Reliable SR Operation • Separa te 100 V Rated Sense Inputs for Sensing the Drain and Source Voltag.


ON Semiconductor FAN6248LD

e of each SR MOSFET • Adaptive Parasit ic Inductance Compensation to Minimize the Body Diode Conduction • SR Curren t Inversion Detection under Light Load Condition • Light Load Detection to I ncrease Dead Time Target • Adaptive M inimum on Time for Noise Immunity • O perating Voltage Range up to 30 V • L ow Start-up and Stand-by Current Consum ption • Operating Frequency Ra.




Part

FAN6248LD

Description

Advanced Synchronous Rectifier Controller



Feature


FAN6248HC/HD/LC/LD Advanced Synchronous Rectifier Controller for LLC Resonant Converter The FAN6248 is an advanced sy nchronous rectifier (SR) controller tha t is optimized for LLC resonant convert er topology with minimum external compo nents. It has two driver stages for dri ving the SR MOSFETs which are rectifyin g the outputs of the secondary transfor mer windings. The .
Manufacture

ON Semiconductor

Datasheet
Download FAN6248LD Datasheet




 FAN6248LD
FAN6248HC/HD/LC/LD
Advanced Synchronous
Rectifier Controller for LLC
Resonant Converter
The FAN6248 is an advanced synchronous rectifier (SR) controller
that is optimized for LLC resonant converter topology with minimum
external components. It has two driver stages for driving the SR
MOSFETs which are rectifying the outputs of the secondary
transformer windings. The two gate driver stages have their own
sensing inputs and operate independently of each other. The adaptive
parasitic inductance compensation function minimizes the body diode
conduction maximizing the efficiency. The advanced control
algorithm allows stable SR operation over entire load range.
According to the operating frequency and turn-off threshold voltage,
FAN6248 has four different versions − FAN6248HCMX,
FAN6248HDMX, FAN6248LCMX, FAN6248LDMX.
Features
Highly Integrated Self-contained Control of Synchronous Rectifier
with a Minimum External Component Count
Optimized for LLC Resonant Converter
Anti Shoot-through Control for Reliable SR Operation
Separate 100 V Rated Sense Inputs for Sensing the Drain and Source
Voltage of each SR MOSFET
Adaptive Parasitic Inductance Compensation to Minimize the Body
Diode Conduction
SR Current Inversion Detection under Light Load Condition
Light Load Detection to Increase Dead Time Target
Adaptive Minimum on Time for Noise Immunity
Operating Voltage Range up to 30 V
Low Start-up and Stand-by Current Consumption
Operating Frequency Range from 25 kHz up to 700 kHz
SOIC−8 Package
High Driver Output Voltage of 10.5 V to Drive All MOSFET Brands
to the Lowest RDS_ON
Low Operating Current in Green Mode (typ. 350 mA)
These Devices are Pb−Free, Halogen Free and are RoHS Compliant
Applications
High Power Density Laptop Adapter
High Power Density Adapter
Large Screen LCD−TV, PDP−TV, RP−TV Power
High-efficiency Desktop and Server Power Supplies
Networking and Telecom Power Supplies
High Power LED Lighting
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SOIC−8
CASE 751EB
MARKING DIAGRAM
ON ZXYTT
FAN6248UV
U
= Frequency, H: High, L: Low
V
= VTH_OFF Level, C or D
Z
= Assembly Plant Code
X
= Year Code
Y
= Two Week Code
TT
= Die Run Code
PIN CONNECTIONS
GATE1 1
GND 2
VD1 3
VS1 4
8 GATE2
7 VDD
6 VD2
5 VS2
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information on page 3 of
this data sheet.
© Semiconductor Components Industries, LLC, 2017
1
January, 2018 − Rev. 2
Publication Order Number:
FAN6248HC/D




 FAN6248LD
VAC
EMI
Filter
Bridge
Diode
PFC
Stage
Cin
FAN6248HC/HD/LC/LD
M2
Roffset2
Optional
Q1
Cr
Lr
Q2
Lp
VO
CO
RO
LLC
Controller
Optional
M1
Shunt
Regulator
Figure 1. Typical Application Schematic of FAN6248
VDD
IOFFSET1
VTH_HGH
VD1
VTH_ON
VS1
VTH_OFF1,2
Turn−off
Trigger
Blanking
7.2V
VD1_HGH
DLY_EN
Adaptive
turn−on
debounce
DQ
Turn−on
CLR Q
Turn−off
GREEN
4.5/4.2V
VD2_HGH
DLY_EN
QD
Adaptive
Q CLR
Turn−on
turn−on
debounce
Turn−off
SRC_INV
SRC_INV
IOFFSET2
VTH_HGH
VTH_ON
VD2
VTH_OFF1,2
Turn−off
Trigger
Blanking
VS2
GATE1
VD1_HGH
Green Mode
GREEN
GATE1
GATE2
VD1_HGH
VD2_HGH
IOFFSET1
SR Current
Inversion detect SRC_INV
Light Load
Detection
GND
Figure 2. Internal Block Diagram of FAN6248
GATE2
DLY_EN
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2




 FAN6248LD
FAN6248HC/HD/LC/LD
PIN DESCRIPTION
Pin Number Pin Name
1
GATE1
2
GND
3
VD1
4
VS1
5
VS2
6
VD2
7
VDD
8
GATE2
Description
Gate drive output for SR1
Ground
Synchronous rectifier drain sense input. A IOFFSET1 current source flows out of the DRAIN pin such
that an external series resistor can be used to adjust the synchronous rectifier turn-off threshold.
The IOFFSET1 current source is turned off when VDD is under-voltage or when switching is disabled in
green mode
Synchronous rectifier source sense input for SR1
Synchronous rectifier source sense input for SR2
Synchronous rectifier drain sense input. A IOFFSET2 current source flows out of the DRAIN pin such
that an external series resistor can be used to adjust the synchronous rectifier turn-off threshold.
The IOFFSET2 current source is turned off when VDD is under-voltage or when switching is disabled in
green mode
Supply Voltage
Gate drive output for SR2
ORDERING AND SHIPPING INFORMATION
Ordering Code
Device Marking
FAN6248HCMX
FAN6248HC
VTH_OFF1 / VTH_OFF2
25 mV / 50 mV
Package
SOIC−8
Shipping
2500 / Tape & Reel
FAN6248HDMX
FAN6248HD
0 mV / 25 mV
SOIC−8
2500 / Tape & Reel
FAN6248LCMX
FAN6248LC
25 mV / 50 mV
SOIC−8
2500 / Tape & Reel
FAN6248LDMX
FAN6248LD
0 mV / 25 mV
SOIC−8
2500 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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3




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