- 您现在的位置：买卖IC网 > Sheet目录1253 > XRP2526EVB (Exar Corporation)BOARD EVAL POWER SWITCH XRP2526
X R P 2 5 2 5 - X R P 2 5 2 6
S i n g l e / D u a l C h a n n e l U S B 3 . 0 P o w e r D i s t r i b u t i o n S w i t c h
THEORY OF OPERATION
The XRP2525 and XRP2526 devices are
respectively single and dual channel integrated
high-side power distribution switches that can
be used in any self or bus powered USB
applications. They are compliant with the
latest USB 3.0 specifications. The reverse
current protection feature prevents current to
flow from OUT to IN when the device is
disabled.
I NPUT & O UTPUT
Placing bulk capacitances of at least 47 μ F and
10 μ F at the input and output pins respectively
reduces power supply transients under heavy
current load conditions.
It is important to place a 1 μ F ceramic bypass
capacitor from IN to GND as close as possible
to the device in order to control supply
transients.
Furthermore, bypassing the output pin with a
0.1 μ F to 1 μ F ceramic capacitor improves the
device response to short-circuit transients.
E RROR F LAG
The error flag signal (FLG X output pin) is an
open-drain output and is pulled low (active
low) upon detection of the following
conditions:
? Over-current condition
? Over-temperature condition
? Under voltage lockout condition
Over-temperature and under voltage lockout
conditions are flagged immediately while the
over – current condition is reported only if this
condition persists continuously for longer than
the blanking time of 10ms. The blanking time
prevents erroneous reporting of current faults
due to brief output current spikes.
Once activated, the error flag signal remains
low until all fault conditions have been
removed and is independent for each
individual channel.
C URRENT L IMIT
The current limit threshold is preset internally.
It protects the output MOSFET switches from
damages resulting from undesirable short
circuit conditions or excess inrush current,
which is often encountered during hot plug-in.
The low limit of the current limit threshold of
the XRP2525 and XRP2526 allows a minimum
current of 0.9A through the MOSFET switches.
When an overcurrent condition is detected, the
output current is limited to a constant current
limit threshold value and output voltage is
reduced accordingly. Triggering the current
limit function is signaled by the Error Flag
after 10ms of blanking time period.
U NDER -V OLTAGE L OCKOUT
Under-voltage lockout function (UVLO) keeps
the internal power switch from being turned
on until the power supply has reached at least
1.68V, even if the switch is enabled. Upon
detection of an input voltage below
approximately 1.68V, the power switch is
turned off while a fault condition is reported by
the error flag signal.
T HERMAL P ROTECTION
Internal thermal sensing circuitry monitors the
operating temperature of the device for each
channel independently. Upon detection of a
temperature in excess of 135°C, the power
switch for the given channel is disabled
preventing any damages to the device while a
fault condition is reported by the error flag
signal. A built-in 10°C hysteresis allows the
device to cool down to 125°C before resuming
normal operations on the faulty channel at
which point the error flag signal is cleared.
T EST C IRCUIT
? 2011 Exar Corporation
9/11
Rev. 1.1.0
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
XRP2528EVB
BOARD EVAL POWER SWITCH XRP2528
XT800SM
GAS TRIGGER TUBE 800V SMD
YMCRPR8C25
REF PLATFORM MOTOR CTRL R8C/25
ZB3251
INLINE FUSE HOLDER PLASTIC BODY
ZB3260
INLINE FUSE HOLDER BAKELITE BODY
ZB3270
PANEL MOUNT FUSE HOLDER
ZEN056V130A24GS
POLYZEN 5.6V PPTC/ZENER SMD
ZLUSBEVAL1Z
BOARD USB TO SMBUS INTERFACE
相关代理商/技术参数
XRP2526ID-1-F
功能描述:电源开关 IC - USB DUAL CH USB SWITCH ACTIVE HIGH
RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube
XRP2526ID-2-F
功能描述:电源开关 IC - USB DUAL CH USB SWITCH ACTIVE LOW
RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube
XRP2526IDTR-1-F
功能描述:电源开关 IC - USB DUAL CH USB SWITCH ACTIVE HIGH
RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube
XRP2526IDTR-2-F
功能描述:电源开关 IC - USB DUAL CH USB SWITCH ACTIVE LOW
RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube
XRP2527
制造商:EXAR 制造商全称:EXAR 功能描述:Single/Dual Channel Adjustable Current Power Distribution Switch
XRP2527EVB
功能描述:交换机 IC 开发工具 XRP2527 EVAL BOARD USB 3.0 POWER
RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:USB Power Switches 工具用于评估:MAX4984E 工作电源电压:2.8 V to 5.5 V
XRP2527IHB-1-F
功能描述:电源开关 IC - USB SINGLE CH USB SWITCH w/ ADJ. CURRENT
RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube
XRP2527IHBTR-1-F
功能描述:电源开关 IC - USB SINGLE CH USB SWITCH w/ ADJ. CURRENT
RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube