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TPD3S014EVM 产品设计参考手册 - TI（德州仪器）
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TI（德州仪器）
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开发套件
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TEXAS INSTRUMENTS TPD3S014EVM 评估板, TPD3S014 USB 保护, 短路/过载保护
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TPD3S014EVM数据手册
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User's Guide
SLVUA94–September 2014
TPD3S014EVM
This user's guide describes the characteristics, operation, and use of the TPD3S014EVM evaluation
module (EVM). This EVM includes five TPD3S014’s in various configurations for testing. One TPD3S014
is configured for IEC61000-4-2 compliance testing, one is configured for 4-port s-parameter analysis, one
is pinned out for evaluating the current limiting switch, one is configured for throughput on USB 2.0 Type A
connectors for throughput analysis, and one is configured for the capture of clamping waveforms during
an ESD event. This user's guide includes setup instructions, schematic diagrams, a bill of materials, and
printed-circuit board layout drawings for the evaluation module.
1 Introduction
Texas Instrument’s TPD3S014 evaluation module helps designers evaluate the operation and
performance of the TPD3S014 device. The TPD3S014 is a current limiting switch intended for applications
such as USB where heavy capacitive loads and short-circuits are likely to be encountered; TPD3S014
provides short-circuit and over-current protection. This device has a fixed current-limit threshold of 0.5 A.
ESD protection for D+ and D– is also provided.
The EVM contains five TPD3S014s. TPD3S014 (U1) is configured with two USB2.0 Type A connectors
(USB1 & USB2) for capturing Eye Diagrams and evaluating current limiting with a system. TPD3S014
(U2) is configured with 4 SMA (J1 – J4) connectors to allow 4-port analysis with a vector network
analyzer. TPD3S014 (U4) is configured with test points for striking ESD to the protection pins. TPD3S014
(U3) is configured for capturing clamping waveforms with an oscilloscope during an ESD test. Caution
must be taken when capturing clamping waveforms during an ESD event so as not to damage the
oscilloscope. A proper procedure is outlined below in Section 3.4.1.
2 Definitions
Contact Discharge — a method of testing in which the electrode of the ESD simulator is held in contact
with the device-under-test (DUT).
Air Discharge — a method of testing in which the charged electrode of the ESD simulator approaches
the DUT, and a spark to the DUT actuates the discharge.
ESD simulator — a device that outputs IEC61000-4-2 compliance ESD waveforms shown in Figure 1
with adjustable ranges shown in Table 1 and Table 2.
IEC61000-4-2 has 4 classes of protection levels. Classes 1 – 4 are shown in Table 1. Stress tests
should be incrementally tested to level 4 as shown in Table 2 until the point of failure. If the DUT
does not fail at 8kV, testing can continue in 2 kV increments until failure.
Table 1. IEC61000-4-2 Test Levels
Contact Discharge Air Discharge
Class Test Voltage [± kV] Class Test Voltage [± kV]
1 2 1 2
2 4 2 4
3 6 3 8
4 8 4 15
1
SLVUA94–September 2014 TPD3S014EVM
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