SR05 데이터 시트보기 (PDF) - Semtech Corporation
부품명
상세내역
일치하는 목록
SR05 Datasheet PDF : 9 Pages
| |||
PROTECTION PRODUCTS
Applications Information (continued)
the power supply connection. During an ESD event,
the current will be directed through the integrated TVS
diode to ground. The total clamping voltage seen by
the protected IC due to this path will be:
VC = VF(RailClamp) + VTVS
This is given in the data sheet as the rated clamping
voltage of the device. For a SR05 the typical clamping
voltage is <16V at IPP=30A. The diodes internal to the
RailClamp are low capacitance, fast switching devices
that are rated to handle transient currents and main-
tain excellent forward voltage characteristics.
Universal Serial Bus ESD Protection
The figure below illustrates how to use the SR05 to
protect one upstream USB port and the SRDA05-4 to
protect two downstream USB ports. When the voltage
on the data lines exceed the bus voltage (plus one
diode drop), the internal rectifiers are forward biased
conducting the transient current away from the pro-
tected controller chip. The TVS diode directs the surge
to ground. The TVS diode also acts to suppress ESD
strikes directly on the voltage bus. Thus, both power
and data pins are protected with a single device.
Reference Semtech application note SI96-18 for
further information.
SR05
2000 Semtech Corp.
6
www.semtech.com
Share Link: 