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參數(shù)資料
| 型號： | IRU3146CF |
| 廠商： | International Rectifier |
| 英文描述： | DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND AUTO-RESTART |
| 中文描述： | 雙同步PWM控制器，帶有均流電路和自動重新啟動 |
| 文件頁數(shù)： | 1/30頁 |
| 文件大?。?/td> | 528K |
| 代理商： | IRU3146CF |
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IRU3146
1
Rev. 1.1
6/25/04
www.irf.com
Data Sheet No.PD 94702
DESCRIPTION
The IRU3146 IC combines a Dual synchronous Buck
controller, providing a cost-effective, high performance
and flexible solution. The IRU3146 can configured as 2-
independent or as 2-phase controller. The 2-phase con-
figuration is ideal for high current applications. The
IRU3146 features 180 out of phase operation which re-
duces the required input/output capacitance and results
to few number of capacitor quantity. Other key features
offered by this device include two independent program-
mable soft starts, programmable switching frequency up
to 500KHz per phase, under voltage lockout function.
The current limit is provided by sensing the lower
MOSFET's on-resistance for optimum cost and perfor-
mance.
Dual Synchronous Controller with 180 out-of-phase
Configurable to 2-Independent Outputs or 2-Phase
Single Output
Current Sharing Using Inductor's DCR
Current Limit using MOSFET's R
DS(ON)
Hiccup/Latched Current Limit
Latched Over-Voltage Protection
Vcc from 4.5V to 16V Input
Programmable Switching Frequency up to 500KHz
Two Independent Soft-Starts/ Shutdowns
0.8V Precision Reference Voltage Available
Power Good Output
External Frequency Synchronization
APPLICATIONS
Embedded Computer Systems
Telecom Systems
Point of Load Power Architectures
FEATURES
DUAL SYNCHRONOUS PWM CONTROLLER WITH
CURRENT SHARING CIRCUITRY AND AUTO-RESTART
Figure 1 - Typical application of IRU3146 in 2-phase configuration with inductor current sensing
PACKAGE ORDER INFORMATION
DEVICE PACKAGE
IRU3146CF 28-Pin TSSOP (F)
2-Phase Power Suppl
y
Graphic Card
DDR Memory Applications
12V
PGood
Q5
L4
Q4
C5
U1
1.8V @ 30A
R8
C16
L3
C17
R9
R7
C10
R4
C9
R3
C8
C3
C4
C13
C11
PGnd1
V
P2
V
CL
V
OUT3
LDrv1
HDrv1
Fb1
Fb2
LDrv2
HDrv2
VcH1
VcH2
Vcc
Gnd
Comp2
Comp1
SS1 / SD
SS2 / SD
PGood
V
REF
IRU3146
Q3
Q2
C14
Sync
Rt
Hiccup
PGnd2
OCSet2
OCSet1
V
SEN1
V
SEN2
R2
R1
R6
D1
C12
D2
BAT54A
C18
R5
C15
R11
R10
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