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Automotive USB Type-A to Type-C Port Converter with Protection

Convert Your Type-A USB Port to a USB Type-C Port with This Tiny Solution

Product Details

The MAX20463 is a small, integrated USB Type-C™ Downstream-Facing Port (DFP) solution used to convert an existing USB-A head-unit captive-cable port to a head-unit USB Type-C captive-cable port. When the MAX20463 is designed into an automotive module at the end of the cable, then the existing upstream head-unit USB-A solution and the existing USB-A captive-cable housing can be reused.

The device protection features include ±15kV/±8kV IEC 61000-4-2 ESD on CC1/CC2, and IEC ESD with short-to-battery (18V) on SENSE/HVBUS. The MAX20463A senses a short of the passenger cable shield to car battery, preventing damage to the port. Short-to-ground and short-to-battery survival are also provided on the HVBUS signal and defined to operate in concert with the existing head-unit USB-A charger/protector, allowing coordinated fault detection and reporting to the head-unit USB host. The device is compliant with the USB Type-C specification.

The MAX20463 is available in a small, 3mm x 3mm, 12-pin TDFN package, using very few external components.

Key Features

  • USB Type-C R1.3 compliance with integrated VBUS Discharge
    • USB Type-C 1.5A and 3.0A DFP Controller
    • Type-C Current Limit Reduction with VBUS Dropout
  • Designed for Cooperative Protection with Head-Unit Protector
    • Short-to-Battery and Short-to-Ground Survival on HVBUS for Upstream Protector to Handle
    • Accurate USB Bus Forward Current Threshold
    • Low RON 28mΩ (Typ) USB Power Switch
  • Robust Design Keeps Vehicle System and Portable Devices Safe in Automotive Environment
    • Optional Shield Short-to-Battery Detection and External FET Control
    • Short-to-BUS Protection on Protected CC1 and CC2 Outputs
    • IEC 61000-4-2 Level-4 ESD Protection (HVBUS, CC1, CC2, SENSE)
  • 3mm x 3mm 12-Pin TDFN Package
  • -40°C to +105°C Operating Temperature Range
  • AEC-Q100 Qualified

Applications/Uses

  • Automotive Downstream USB Modules
  • Automotive USB Captive-Cable Housing
Parametric specs for USB Host Adapter Emulator
Charging Modes USB Type-C Downstream Facing Port (DFP)
Supported Charging Configurations USB Type-C 0.5A
USB Type-C 1.5A
USB Type-C 3.0A
Supported USB Battery Charging Specification n/a
Current Limit Switch Control Configuration Resistor or GPIO
CDP Emulation No
Remote Wake-Up Support No
VBUS Reset Time (sec) (typ) 0.001
Package/Pins TDFN-CU/12
Oper. Temp. (°C) -40°C to +105°C
Budgetary
Price (See Notes)
$0.92 @1k
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Simplified Block Diagram

MAX20463, MAX20463A: Functional Diagram MAX20463, MAX20463A: Functional Diagram Zoom icon

Technical Docs

Design & Development

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Description

The MAX20463 evaluation kit (EV kit) demonstrates the MAX20463; a small, integrated USB Type-C™ solution for automotive radio, navigation, connectivity, and USB head units and infotainment applications. The device provides a one-chip solution to convert an existing downstreamfacing port from supporting the USB-A connector to supporting the USB Type-C connector.

The device features an integrated USB Type-C interface to control the new configuration channel (CC) pins found in the USB Type-C connector. It supports the downstreamfacing port (DFP) role and supports VBUS current limits including 1.5A and 3.0A. The MAX20463 can coexist with BC1.2 and Apple charging technologies, as these are controlled by the host emulator in the upstream module.

An integrated high-side power switch protects the device against faults and allows most fault conditions to be detected and handled by the upstream 5V power supply. This avoids possible contention, in which both the upstream 5V power supply and the MAX20463 detect the same fault and simultaneously try to resolve it.

The BIAS circuitry provides a solution to the transient conditions seen in automotive USB charging applications. The device is designed to stay powered on during the CC attach process even if VBUS droops due to an overcurrent, or other low voltage condition, for a short period of time. The period of time that the part can stay powered on can be configured by the module design engineer to provide the time required for the upstream 5V power supply to detect and handle the fault. The device stay-on time is determined by the amount of capacitance on BIAS, which must be at least 22µF, but can be increased above this value. The device and its solution circuit are designed to conform to the USBIF specification for short-to-ground response.

MAX20463 is an automotive USB protector that integrates USB shield short-to-battery protection. A short circuit from the USB shield to the car battery can occur when a customer’s portable device cable is connected to the vehicle Type-C receptacle, and the far end of this cable falls into the 12V cigarette lighter (accessory port) contact- ing the 12V center terminal. This situation can result in a damaging amount of current flow through the USB cable, and can cause cable combustion if the cigarette-lighter fuse response time is insufficient. MAX20463 is designed to sense this condition (shield shorted to battery) with the SENSE pin and control an N-channel MOSFET with the GDRV pin to stop the flow of current.

The device and EV kit operate from a VBUS voltage of 4.75V to 7V.

The EV Kit enables testing and configuration of the MAX20463’s CC current advertisement behavior. The device provides a CC_SEL pin for this purpose. Connecting the CC_SEL pin to BIAS or GND through jumper J6 selects between the two different current levels (refer to Table 1).

The EV kit is configured for 3A output operation and the included three-meter USB cable allows for demonstration of use with an upstream-voltage-compensated power supply such as MAX16984, MAX16987, MAX20037, or MAX20038.

View Details

Features

  • Configurable Charge Detection Modes: USB-C 3.0A, 1.5A
  • High-Side USB Power-Protection Switch
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX20463A evaluation kit (EV kit) demonstrates the MAX20463A; a small, integrated USB Type-C™ solution for automotive radio, navigation, connectivity, and USB head units and infotainment applications. The device provides a one-chip solution to convert an existing downstream- facing port from supporting the USB-A connector to supporting the USB Type-C connector.

The device features an integrated USB Type-C interface to control the new configuration channel (CC) pins found in the USB Type-C connector. It supports the downstreamfacing port (DFP) role and supports VBUS current limits including 1.5A and 3.0A. The MAX20463A can coexist with BC1.2 and Apple charging technologies, as these are controlled by the host emulator in the upstream module.

An integrated high-side power switch protects the device against faults and allows most fault conditions to be detected and handled by the upstream 5V power supply. This avoids possible contention, in which both the upstream 5V power supply and the MAX20463A detect the same fault and simultaneously try to resolve it.

The BIAS circuitry provides a solution to the transient conditions seen in automotive USB charging applications. The device is designed to stay powered on during the CC attach process even if VBUS droops due to an overcurrent, or other low voltage condition, for a short period of time. The period of time that the part can stay powered on can be configured by the module design engineer to provide the time required for the upstream 5V power supply to detect and handle the fault. The device stay-on time is determined by the amount of capacitance on BIAS, which must be at least 22μF, but can be increased above this value. The device and its solution circuit are designed to conform to the USBIF specification for short-to-ground response.

MAX20463A is an automotive USB protector that integrates USB shield short-to-battery protection. A short circuit from the USB shield to the car battery can occur when a customer’s portable device cable is connected to the vehicle Type-C receptacle, and the far end of this cable falls into the 12V cigarette lighter (accessory port) contacting the 12V center terminal. This situation can result in a damaging amount of current flow through the USB cable, and can cause cable combustion if the cigarettelighter fuse response time is insufficient. MAX20463A is designed to sense this condition (shield shorted to battery) with the SENSE pin and control an N-channel MOSFET with the GDRV pin to stop the flow of current.

The device and EV kit operate from a VBUS voltage of 4.75V to 7V.

The EV Kit enables testing and configuration of the MAX20463A’s CC current advertisement behavior. The device provides a CC_SEL pin for this purpose. Connecting the CC_SEL pin to BIAS or GND through jumper J6 selects between the two different current levels (refer to Table 1)

The EV kit is configured for 3A output operation and the included three-meter USB cable allows for demonstration of use with an upstream-voltage-compensated power supply such as MAX16984, MAX16987, MAX20037, or MAX20038.

View Details

Features

  • Configurable Charge Detection Modes: USB-C 3.0A, 1.5A
  • High-Side USB Power-Protection Switch
  • Proven PCB Layout
  • Fully Assembled and Tested

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Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal

Parameters

Parametric specs for USB Host Adapter Emulator
Charging Modes USB Type-C Downstream Facing Port (DFP)
Supported Charging Configurations USB Type-C 0.5A
USB Type-C 1.5A
USB Type-C 3.0A
Supported USB Battery Charging Specification n/a
Current Limit Switch Control Configuration Resistor or GPIO
CDP Emulation No
Remote Wake-Up Support No
VBUS Reset Time (sec) (typ) 0.001
Package/Pins TDFN-CU/12
Oper. Temp. (°C) -40°C to +105°C
Budgetary
Price (See Notes)
$0.92 @1k

Key Features

  • USB Type-C R1.3 compliance with integrated VBUS Discharge
    • USB Type-C 1.5A and 3.0A DFP Controller
    • Type-C Current Limit Reduction with VBUS Dropout
  • Designed for Cooperative Protection with Head-Unit Protector
    • Short-to-Battery and Short-to-Ground Survival on HVBUS for Upstream Protector to Handle
    • Accurate USB Bus Forward Current Threshold
    • Low RON 28mΩ (Typ) USB Power Switch
  • Robust Design Keeps Vehicle System and Portable Devices Safe in Automotive Environment
    • Optional Shield Short-to-Battery Detection and External FET Control
    • Short-to-BUS Protection on Protected CC1 and CC2 Outputs
    • IEC 61000-4-2 Level-4 ESD Protection (HVBUS, CC1, CC2, SENSE)
  • 3mm x 3mm 12-Pin TDFN Package
  • -40°C to +105°C Operating Temperature Range
  • AEC-Q100 Qualified

Applications/Uses

  • Automotive Downstream USB Modules
  • Automotive USB Captive-Cable Housing

Description

The MAX20463 is a small, integrated USB Type-C™ Downstream-Facing Port (DFP) solution used to convert an existing USB-A head-unit captive-cable port to a head-unit USB Type-C captive-cable port. When the MAX20463 is designed into an automotive module at the end of the cable, then the existing upstream head-unit USB-A solution and the existing USB-A captive-cable housing can be reused.

The device protection features include ±15kV/±8kV IEC 61000-4-2 ESD on CC1/CC2, and IEC ESD with short-to-battery (18V) on SENSE/HVBUS. The MAX20463A senses a short of the passenger cable shield to car battery, preventing damage to the port. Short-to-ground and short-to-battery survival are also provided on the HVBUS signal and defined to operate in concert with the existing head-unit USB-A charger/protector, allowing coordinated fault detection and reporting to the head-unit USB host. The device is compliant with the USB Type-C specification.

The MAX20463 is available in a small, 3mm x 3mm, 12-pin TDFN package, using very few external components.

Simplified Block Diagram

MAX20463, MAX20463A: Functional Diagram MAX20463, MAX20463A: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal