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09.14.2022
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Final yr, the USB Implementers Discussion board, Inc. (USB-IF) introduced USB Energy Supply Specification Revision 3.1 (USB PD3.1 specification), which supported increased energy vary, as much as 48 Volts, 5 Amps and 240 Watts. Which means a complete improve can be carried out on energy adapters, USB Sort-C cables and digital units. For the USB Sort-C cables, the necessities for security efficiency can be increased.
Security of USB Sort-C Cables
The USB PD3.1 specification nonetheless adopts the USB Sort-C port, which has a pin pitch of 0.5 mm, which is way more compact than the two.5 mm in a USB Sort-A port. On this case, USB Sort-C ports are extra weak by contaminants akin to mud and liquid. When contaminants enter the USB Sort-C port, it might type a micro-short circuit between VBUS pin and GND pin on the USB Sort-C port. This could trigger the interface to overheat and trigger a hearth.
Determine 1. The burned USB Sort-C ports
As well as, frequent plugging and unplugging might trigger mechanical failure of the USB Sort-C port. These failures can destroy the pc’s interface and trigger critical injury to digital units, probably even injuring the consumer by means of electrical shock or inflicting a hearth.
In an effort to clear up the above points, an over-temperature safety resolution for the interface is required.
Determine 2. The USB Sort-C cable spontaneously combusts
Over Temperature Safety for the USB Sort-C Cables with USB eMarker HUSB332C
The brand new technology USB eMarker HUSB332C from Hynetek Semiconductor Co., Ltd. (www.hynetek.com) is suitable with USB PD3.1 specification, and helps as much as 240 Watts charging energy, whereas integrating Over Temperature Safety (OTP) with Hynetek patented OTP operate to make sure superior efficiency and efficient safety for the USB Sort-C cables. The HUSB332C comes with temperature detection with pre-set safety temperature restrict values. When the USB Sort-C port overheats, the HUSB332C will detect the temperature contained in the USB Sort-C port and as soon as the temperature exceeds the OTP restrict worth, it’ll ship a reset sign to the USB PD energy provide to chop off the VBUS energy to guard the circuit. When the temperature drops beneath the OTP restrict, the ability supply recovers.
Determine 3. Waveform diagram of HUSB332C throughout over-temperature check
Determine 4. Reference circuit of “One Cable with Two eMarkers”
The reference circuit of “One Cable with Two eMarker” utilizing the HUSB332C can meet the cable’s over-temperature safety necessities. [Note: ” One Cable with Two eMarkers ” means there is one eMarker at each end of the USB Type-C cable.]
Answer Evaluation of ” One Cable with Two eMarkers”
Determine 5. Examples of “One Cable with Two eMarker”
With the introduction of USB PD3.1 specification, USB4 Gen3 specification, Thunderbolt 4 specification and different specs, as proven above, the ” One Cable with Two eMarkers ” cables which helps for high-power present switch, ultra-high-speed information switch, video sign switch, are often seen out there. Amongst them, the unique meeting cable in Samsung’s new Galaxy S22 sequence 45W journey charger adopts the “One Cable with Two eMarkers” design. There’s one HUSB332A (the USB eMarker from Hynetek) at each ends of the cable.
The HUSB332A’s excessive efficiency and reliability has been confirmed by many well-known corporations and the USB Sort-C cable market. On the improve of the HUSB332A, the HUSB332B can assist USB PD3.1 specification. As well as, the HUSB332C enhances the over temperature safety (OTP) operate.
Comparability of 4 OTP Options for the USB Sort-C Cables
Evaluating the 4 over-temperature safety options for the USB cables out there, we are able to simply discover that the over-temperature safety resolution through the use of USB eMarker has the apparent benefits of small measurement and excessive price efficiency. The USB eMarker chip is required by the USB-IF to fulfill the charging necessities of three Amps and above. So when USB eMarker integrates the OTP operate, the cable might be protected with out the necessity for extra OTP circuit. This tremendously reduces the variety of peripheral units, whereas additionally decreasing price.
Key Product Options of the USB eMarker HUSB332C
- USB Sort-C 2.1 and USB PD 3.1 Compliant
- Assist SOP’ Communication
- Built-in Transceiver (BMC PHY)
- Assist Each Structured VDM Model 1.0 and a pair of.0
- Excessive Integration
- Built-in Over- Temperature Safety
- Totally different Bundle Choices:
- 2 mm x 2 mm DFN-6L
- 095 mm x 1.305 mm WLCSP-6B (below improvement)
- Assist 4 Instances Programming
- Appropriate with CC Wire Programming Instruments
- Assist 2.7 V ~ 5.75 V operation on VCONN1 and VCONN2 Pins
- 35 V Excessive Voltage Tolerance on CC, VCONN1 and VCONN2 Pins
- Assist Thunderbolt 3 and Thunderbolt 4 Information Communication
- Encryption Instructions Supported for Vendor Identification
- Built-in Over-temperature Safety
- 6 mA Extremely-Low Energy Consumption
In case you are searching for an Over-Temperature Safety Answer for USB Cables, please go to https://en.hynetek.com or contact gross sales@hynetek.com for particulars.
