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IR11672ASのメーカーはInternational Rectifierです、この部品の機能は「ADVANCED SMART RECTIFIER CONTROL IC」です。 |
部品番号 | IR11672AS |
| |
部品説明 | ADVANCED SMART RECTIFIER CONTROL IC | ||
メーカ | International Rectifier | ||
ロゴ | |||
このページの下部にプレビューとIR11672ASダウンロード(pdfファイル)リンクがあります。 Total 25 pages
November 19, 2009
IR11672AS
ADVANCED SMART RECTIFIER TM CONTROL IC
Features
Product Summary
• Secondary side high speed SR controller
• DCM, CrCM flyback and Resonant half-bridge Topology
topologies
• 200V proprietary IC technology
VD
• Max 500KHz switching frequency
• Anti-bounce logic and UVLO protection
VOUT
• 7A peak turn off drive current
• Micropower start-up & ultra low quiescent current
Io+ & I o- (typical)
• 10.7V gate drive clamp
Turn on Propagation
• 50ns turn-off propagation delay
Delay
•
•
•
Vcc range from 11.3V to 20V
Direct sensing of MOSFET drain voltage
Enable function synchronized with MOSFET VDS
Turn off Propagation
Delay
transition
• Cycle by Cycle MOT Check Circuit prevents multiple Package Options
false trigger GATE pulses
• Lead-free
• Compatible with 0.3W Standby, Energy Star, CECP,
etc.
Flyback,
Resonant Half-bridge
200V
10.7V
+2A & -7A
60ns (typical)
50ns (typical)
Typical Applications
• LCD & PDP TV, Telecom SMPS, AC-DC adapters,
ATX SMPS, Server SMPS
Typical Connection Diagram
8-Lead SOIC
www.DataSheet4U.com Vin
Rs
Cs
Ci
XFM
Rdc
RMOT
U1
1 VCC VGATE 8
2 OVT
GND 7
3 MOT
VS 6
4 EN
VD 5
Rg
IRIR1111667712AS
Cdc
Co
Rtn Q1
*Please note that this datasheet contains advance information that could change before the product is
released to production.
www.irf.com
© 2009 International Rectifier
1 Page IR11672AS
Description
IR11672A is a smart secondary-side driver IC designed to drive N-Channel power MOSFETs used as
synchronous rectifiers in isolated Flyback and resonant half-bridge converters. The IC can control one or
more paralleled N-MOSFETs to emulate the behavior of Schottky diode rectifiers. The drain to source voltage
is sensed differentially to determine the polarity of the current and turn the power switch on and off in
proximity of the zero current transition. The cycle-by-cycle MOT protection circuit can automatically detect no
load condition and turn off gate driver output to avoid negative current flowing through the MOSFETs.
Ruggedness and noise immunity are accomplished using an advanced blanking scheme and double-pulse
suppression which allow reliable operation in all operating modes.
www.DataSheet4U.com
www.irf.com
© 2009 International Rectifier
3
3Pages IR11672AS
Electrical Characteristics
VCC=15V and TA = 25°C unless otherwise specified. The output voltage and current (VO and IO) parameters
are referenced to GND (pin7).
Supply Section
Parameters
Supply Voltage Operating
Range
VCC Turn On Threshold
VCC Turn Off Threshold
(Under Voltage Lock Out)
VCC Turn On/Off Hysteresis
Symbol
VCC
VCC ON
VCC UVLO
VCC HYST
Min.
11.4
9.8
8.4
Operating Current
ICC
Quiescent Current
Start-up Current
Sleep Current
Enable Voltage High
Enable Voltage Low
Enable Pull-up Resistance
IQCC
ICC START
I SLEEP
VENHI
VENLO
REN
2.15
1.2
Typ.
10.55
9
1.55
8.5
50
1.8
100
150
2.70
1.6
1.5
Max.
18
11.3
9.7
10
65
2.2
200
200
3.2
2.0
Units
Remarks
V GBD
V
V
V
mA CLOAD=1nF,fSW=400kHz
mA CLOAD=10nF,fSW=400kHz
mA
µA VCC=VCC ON - 0.1V
µA VEN=0V, VCC =15V
V
V
MΩ GBD
Comparator Section
Parameters
Turn-off Threshold
Turn-on Threshold
Hysteresis
Input Bias Current
Input Bias Current
www.DataSheet4U.com
Comparator Input Offset
Input CM Voltage Range
Symbol
VTH1
VTH2
VHYST
IIBIAS1
IIBIAS2
VOFFSET
VCM
Min.
-7
-14
-22
-150
-0.15
Typ.
-3.5
-9.5
-18
55
1
30
Max.
0
-6
-14
-50
7.5
100
2
2
Units
Remarks
OVT = 0V, VS=0V
mV OVT floating, VS=0V
OVT = VCC, VS=0V
mV
mV
µA VD = -50mV
µA VD = 200V
mV GBD
V
One-Shot Section
Parameters
Blanking pulse duration
Reset Threshold
Hysteresis
Symbol Min.
tBLANK
9
VTH3
VHYST3
Typ.
17
2.5
5.4
40
Max.
25
Units
µs
V
V
mV
Remarks
VCC=10V – GBD
VCC=20V – GBD
VCC=10V – GBD
www.irf.com
© 2009 International Rectifier
6
6 Page | |||
ページ | 合計 : 25 ページ | ||
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PDF ダウンロード | [ IR11672AS データシート.PDF ] |
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部品番号 | 部品説明 | メーカ |
IR11672AS | ADVANCED SMART RECTIFIER CONTROL IC | International Rectifier |