Analog Devices / Maxim Integrated MAX25432 Automotive Port Controller & Protector

Analog Devices MAX25432 Automotive Buck-Boost Port Controller and Protector is designed for an automotive USB host or downstream-facing (DFP) applications. The MAX25432 combines an automotive-grade buck-boost controller capable of full-range 3.3V to 21V programmable power supply (PPS) at up to 6.35A, a USB Power Delivery (USB PD) analog front-end (AFE), legacy USB charging support, and USB Type-C^® protection switches. The protection switches deliver automotive system-level ESD protection and 24V short-circuit protection for D+, D-, CC1, CC2, and VCONN. The MAX25432 device optionally supports legacy charging modes for older passenger phones, including BC1.2, Apple® Charge, Apple CarPlay®, Apple MFi, and USB On-The-Go (OTG).

The Analog Devices MAX25432B integrates a USB PD AFE, which supports the USB-IF Type-C Port Controller Interface (TCPCI) specification and can interface with any I2C master in the application. Meanwhile, the MAX25432A provides configuration channel (CC) signal pass-through protection for an external USB PD controller. G-suffix devices include intelligent detection and protection to avoid high short-circuit currents flowing from the car battery through the cable shield to ground during fault events, thus preventing car module damage.

The MAX25432 is housed in a small, 6mm x 6mm, 40-pin TQFN-EP package and requires very few external components. The MAX25432 evaluation (EV) kit and collateral provide a convenient platform to the design engineer for rapid evaluation with reduced test and firmware development time.

Features

USB PD PHY that is TCPCI-standard for use with any low-cost I²C master (Hub IC, MCU, SoC)
- Ground offset adjusted BMC PHY for maximum signal-to-noise ratio
Non-TCPC versions available for protecting external USB PD controller (MAX25432A)
Integrated buck-boost controller for external H-bridge
- 4.5V to 36V Input operating range
- 220kHz, 300kHz, and 400kHz switching frequency
- External frequency synchronization and spread spectrum for reduced EMI
USB PD PPS APDO support – TID 5821
- 10mV Programmable voltage step size
- 25mA Programmable current step size
Integrated cable compensation up to 516mΩ
AEC-Q100 and AEC-Q006 qualified

Highest performance, safest, and lowest cost passenger cable-shield short-to-battery protection
- Minimizes short-circuit currents with a small, single-FET solution
Integrated high-side current-sense amplifiers, ADC and DAC
Integrated 3.3V to 5.0V, 1.5W, Smart, reliable VCONN switches and protection
- 50mA Programmable overcurrent step size
Integrated 24V DC protection on protected HVD+, HVD-, HVCC1, HVCC2 outputs
Integrated legacy USB 2.0 charging support including BC1.2, Apple carplay, OTG, and Apple MFi Rev 3x
Integrated ±15kV Air-Gap/±8kV contact discharge ISO 10605 and IEC 61000-4-2 ESD protection
-40°C to +125°C Operating temperature range
40-Pin, 6mm x 6mm, TQFN package with EP