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IR11688S 데이터시트 PDF




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부품번호 IR11688S 기능
기능 DUAL SYNCHRONOUS RECTIFICATION CONTROL IC
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IR11688S 데이터시트, 핀배열, 회로
SMPS IC
SmartrectifierTM
IR11688S
DUAL SYNCHRONOUS RECTIFICATION CONTROL IC
Features
Product Summary
Secondary-side high speed synchronous
rectification controller for resonant half bridge
Topology
LLC Half-bridge
converters
VD
Direct sensing of MOSFET drain voltage up to 200V
Operates up to 400kHz switching frequency
VOUT
200V
Vcc
Programmable Minimum On Time
Anti-bounce logic and UVLO protection
Io+ & I o-
+1A & -4A
Linear turn-off phase to compensate for premature
switch off due to parasitic inductance
Package Options
4A peak turn off drive current
Micropower start-up & ultra-low quiescent current
50ns turn-off propagation delay
Wide Vcc operating range 4.75V to 18V
Cycle by Cycle MOT Protection
Auto low power mode standby mode
Improved noise immunity
Compatible with Energy Star low standby power
8-Pin SOIC
Lead-free
Typical Applications
Desktop SMPS, Server SMPS, AC-DC adapters,
LCD & PDP TV, Telecom SMPS
Ordering Information
Base Part Number
Package Type
IR11688S
SOIC8N
Standard Pack
Form
Quantity
Tape and Reel
2500
Complete Part Number
IR11688STRPBF
1 2016-1-18




IR11688S pdf, 반도체, 판매, 대치품
IR11688S
Description
The IR11688 is a dual smart secondary-side controller IC optimized to drive two N-Channel power MOSFETs
configured for synchronous rectification in resonant converter applications. Each channel can drive one or multiple
parallel MOSFETs to emulate the behavior of Schottky diode rectifiers, bypassing the body diodes for the majority
of each conduction period to minimize power dissipation and remaining off during the blocking period.
The drain to source voltage of each rectifier MOSFET is sensed to determine the source to drain current and turn
each gate on rapidly at the start of each conduction cycle and off in close proximity to the zero current transitions
for each branch of the output rectifier circuit. Ruggedness and noise immunity are accomplished using an
advanced blanking scheme and double-pulse suppression that allows reliable operation in fixed and variable
frequency applications.
The programmable minimum on time (MOT) function provides flexibility to work over a wide range of switching
frequencies. The cycle-by-cycle MOT protection circuit is able to automatically detect a light or no load condition so
that the gate drives may be disabled to avoid unwanted reverse currents flowing through the MOSFETs.
The IR11688 has a wide Vcc supply voltage range from 4.75V to 18V, enabling its supply to be derived from the
output and eliminating the need for an auxiliary supply circuit in systems with output voltage as low as 5V.
The IR11688 also has very low quiescent current when the gate drives are not switching to offer minimal power
consumption in standby mode.
4 2016-1-18

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IR11688S 전자부품, 판매, 대치품
IR11688S
Electrical Characteristics
VCC=12V, TA = 25°C unless otherwise specified. The output voltage and current (VO and IO) parameters are
referenced to GND (pin7).
Gate Driver Section
Parameters
Gate Low Voltage
Gate High Voltage
Rise Time
Fall Time
Symbol
VGLO
VGTH
tr
tf
Min.
---
---
---
---
---
Turn on Propagation Delay tDon
---
Turn off Propagation Delay
Pull up Resistance
Pull down Resistance
Output Peak Current
(source)
Output Peak Current (sink)
tDoff
rup
rdown
IO source
IO sink
---
---
---
---
---
Typ.
0.15
11.9
4.9
20
10
200
42
6
1.5
1
4
Max.
0.25
---
---
38
22
250
60
---
---
---
---
Units
V
V
ns
ns
ns
ns
Remarks
IGATE = 100mA
GBD
GBD
CLOAD = 1nF
CLOAD = 1nF
VDS to VGATE – VDS goes down
from 6V to -1V
VDS to VGATE –VDS goes up from
-1V to 6V
GBD
IGATE = -100mA
A GBD
A GBD
GBD – parameter is guaranteed by design and is not tested.
7 2016-1-18

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관련 데이터시트

부품번호상세설명 및 기능제조사
IR11688S

DUAL SYNCHRONOUS RECTIFICATION CONTROL IC

Infineon
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