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In recent years, with the explosive rise of the electric vehicle industry, intelligent cabins, intelligent driving, and intelligent networking have become widely recognized future development trends. However, due to the strict requirements of high safety, high reliability, and high stability, the research and development difficulty and cycle of automotive grade chips far exceed that of consumer and industrial chips. Since 2020, Nanxin has further expanded its product line, focusing on the field of automotive electronics, and has successively launched several automotive grade chips, covering multiple scenarios such as in car hosts/instruments, driving assistance systems, charging, lighting, and body control.

Recently, Nanxin Technology has launched a heavyweight new product:The SC81530Q in car USB charging chip, which supports BC1.2 CDP mode and USB Type-C DFP mode, has passed AEC-Q100 vehicle specification certification. This scheme supports high working voltage up to 36V, integrates synchronous buck converters and current limiting switches, and can achieve peak efficiency of over 94%. It supports A-port and C-port charging, supports BC1.2 CDP and USB Type-C DFP charging protocols, and can be applied in fields such as car cabins, central control screens, and wired charging in vehicles.

SC81530Q is a USB charging chip that integrates a synchronous voltage regulator and a USB current limiting switch. It supports BC1.2 CDP and TypeC DFP mode charging protocols, supports A-port and C-port charging, and internally integrates a DPDM data switch with a bandwidth greater than 1GHz. It is packaged in a 22 pin 4mm X 4mm Wettable Flank QFN package.

SC81530QWith comprehensive protectionProvide output overvoltage protection, inductor cycle by cycle current limiting protection, output short circuit protection, output overcurrent protection, and thermal shutdown protection functions, which can timely cut off the output in case of circuit abnormalities and protect the safety of charging.

SC81530Q can be accessed through± 8kV IEC 61000-4-2 Contact Discharge Test and± 15kV IEC 61000-4-2 air discharge test,With USB_ Short battery protection function of OUT/DM/DP/CC pins.

SC81530QThe overall peak efficiency is as high as 94.1%, and the temperature rise at full load is only 26 ℃. High efficiency and low heat generation can ensure stable operation in high-temperature environments and reduce the pressure of heat dissipation design.

Figure Efficiency Curve of 400kHz, 5V Output

Temperature rise at 400kHz, 13.5V-5V3A

The SC81530Q integrates a high bandwidth DP/DM data switch internally, with excellent eye graph performance.

Eye diagram Vin=12V, F (SW)=400kHz

SC81530Q provides spreading function and can pass rigorous CISPR25 Class 5 testing without adding a common mode inductor.

Figure Current Method Class5 Standard EMC Test 50mm Input 12V, Output 5V3A

Figure Current Method Class5 Standard EMC Test 50mm Input 12V, Output 9V2A

Figure Voltage Method Class5 Standard EMC Test Positive Input 12V, Output 5V3A

Figure Voltage Method Class5 Standard EMC Test Positive Input 12V, Output 9V2A

The SC8153X series also includes support forSC81531Q for Apple 2.4A/DCP/QC3.0 charging protocolSC81532Q supports Apple 2.4A/DCP charging protocolas well asDCDC operates in FPWM mode with SC81530AQ/SC81531AQ/SC81532AQSeries.

Please refer to the official website of Nanxin for specific product details

Product features

SC81530Q complies with AEC-Q100 standards for automotive applications:

• Temperature level 1: TA range: -40° C to 125° C

? Passed Apple MFI certification testing

? Certified by USB-IF Type-C

Integrated synchronous step-down converter:

3.8V to 36V continuous operating input range, 40V absolute withstand voltage

Switching frequency adjustable from 200kHz to 2.2MHz

? Spreading frequency function

External clock synchronization function

Integrated 52.5m Ω/30.5m Ω switching power FET

? PFM and FPWM modes can be selected

Integrate multiple protocols:

• ? Supports BC1.2 CDP mode

• ? Supports USB Type-C DFP mode

• Integrated USB2.0 data switch with 1000MHz bandwidth

• Accurate output current protection for ports C and A

• USB switch with integrated 23m Ω conducting resistor

? Line loss compensation

Short circuit protection for output of Buck converter and USB switch

? USB_ OUT, DP/DM, CC1/CC2 pins for battery short circuit protection

? Fault indication function - indicates OCP, OVP (USB-IN), OTP, USB_ OUT/DP/DM/CC1/CC2 short circuit to battery

? USB_ OUT/CC1/CC2/DP/DM pins can be connected via± 8kV IEC 61000-4-2 contact discharge,± 15kV IEC 61000-4-2 air discharge

SC81530Q is a USB charging chip that integrates a synchronous voltage regulator and a USB current limiting switch. It supports BC1.2 CDP and TypeC DFP mode charging protocols, supports A-port and C-port charging, and has passed automotive grade AEC-Q100 certification, Apple MFI certification testing, USB-IF Type-C certification, and integrates multiple protocols. The overall peak efficiency is as high as 94.1%. SC81530Q can meet the power requirements of in vehicle electronic devices and can be widely used in fields such as cabin and in vehicle wired charging.