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PDF ( 数据手册 , 数据表 ) BL2555

零件编号 BL2555
描述 Load Switch with Adjustable Current Limit
制造商 BELLING
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BL2555 数据手册, 描述, 功能
BL2555
Load Switch with Adjustable Current Limit
DESCRIPTION
The BL2555 is a load switch which provides full
protection to systems and loads which may
encounter large current conditions.
BL2555 offers a 95mΩ current-limited switch which
can operate over an input voltage range of 2.5-5.5V.
The current limit can be externally programmed by
a precision resistor, ranges from 75mA to 1.7A.
Switch control is by a logic input (EN) capable of
interfacing directly with low voltage control signals.
Current is prevented from flowing when the switch
is off and the output voltage is higher than the input
voltage.
BL2555 also features thermal shutdown protection
which shuts off the switch to prevent damage to the
part when a continuous over-current condition
causes excessive heating. When the switch current
reaches the current limit, the parts operate in a
constant-current mode to prohibit excessive
currents from causing damage.
BL2555 is in a tiny DFN2x2-6L package
FEATURES
Up to 1.5A Max Load current
Accurate Current-limit threshold: +/-5%
Programmable Current-limit : 75mA to 1.7A
Fast Over-Current Response
Reversed Current blocking
Thermal Shutdown, UVLO protection
Tiny DFN2x2-6L Package
APPLICATIONS
USB ports/Hubs
Hot Swaps
Cellphones
Tablet PC
Set Top Box
PC motherboard
Handheld Devices
TYPICAL APPLICATION
USB
input
4.7uF
IN OUT
BL2555 ILIM
RILIM
EN GND
Output
120µF
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