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參數資料
| 型號： | IR3651STRPBF |
| 廠商： | International Rectifier |
| 英文描述： | HIGH VOLTAGE SYNCHRONOUS PWM BUCK CONTROLLER |
| 中文描述： | 高壓同步PWM降壓控制器 |
| 文件頁數： | 1/19頁 |
| 文件大小： | 397K |
| 代理商： | IR3651STRPBF |
IR3651SP
b
F
10/11/2006
HIGH VOLTAGE SYNCHRONOUS PWM BUCK CONTROLLER
Description
The IR3651 is a high voltage PWM controller
designed for high performance synchronous Buck
DC/DC applications. The IR3651 drives a pair of
external N-MOSFETs using a programmable
switching frequency up to 400kHz allows flexibility
to tune the operation of the IC to meet system
level requirements, and synchronization allows
the simplification of system level filter design. The
output voltage can be precisely regulated using
the internal 1.25V reference voltage for low
voltage applications. Protection such as under
voltage lockout and hiccup current limit are
provided to give required system level security in
the event of fault conditions.
Features
High Voltage Operating up to 75V
Programmable Switching Frequency up to 400kHz
1A Output Drive Capability
Precision Reference Voltage (1.25V)
Programmable Soft-Start
Programmable Over Current Protection
Hiccup Current Limit Using MOSFET R
DS(on)
sensing
External Frequency Synchronization
14-pin SOIC Package
Applications
48V non-isolated DC to DC Converter
Embedded Telecom Systems
Networking and Computing Voltage Regulator
Distributed Point of Load Power Architectures
General high voltage DC/DC Converters
Typical application Circuit
ORDERING INFORMATION
PKG PACKAGE PIN PARTS PARTS
DESIG DESCRIPTION COUNT PER TUBE PER REEL ORIANTAION
S IR3651SPBF 14 55
S IR3651STRPBF 14 --------
T&R
-------
2500
Fig A
R
OCset
IR3651S
Vcc
Vb
HDrv
LDrv
PGnd
Fb
Gnd
Comp
SS/SD
C2
C3
C7
R4
Q1
Q2
L1
Vout
C8
V
aux
=12V
SYNC
Vin:
12
V-75V
DRVcc
C1
R1
R2
Vs
C4
C6
Rt
R5
C5
C10
C9
R3
OCset
Data Sheet No.PD
94720
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