PI5USB2544ZHEX

Analog Switches - Special Purpose Overview

The PI5USB2544ZHEX is a USB charging port controller and detection power switch manufactured by Diodes Incorporated. It integrates a high-bandwidth analog switch for D+/D- data lines, a power switch with an output current capability of up to 2.5 A, and a charging controller supporting BC1.2, YD/T 1591-2009, Divider-1A/2A, and DCP-1.2V modes. The device operates on a single 4.5 V to 5.5 V supply voltage. Key electrical parameters include a typical on-resistance of 84 mΩ at 25°C and a bandwidth of 2 GHz. It features programmable current limits via external resistors and includes undervoltage lockout, thermal shutdown, and active-low fault reporting.

Analog Switches - Special Purpose Feature Summary

• Integrates a high-bandwidth analog switch to pass USB 2.0 differential signals without corruption while enabling monitoring and handshaking.
• Supports multiple charging protocols including BC1.2 CDP/DCP, YD/T 1591-2009, Divider-1A/2A, and DCP-1.2V schemes.
• Features an auto-detect state machine that selectively implements charging schemes based on connected peripheral characteristics.
• Includes wake-on-USB functionality to support low-speed and full-speed HID device attachment for system sleep-to-wake transitions.

Analog Switches - Special Purpose Applications

• Portable media players and cellular devices requiring fast charging from wall adapters or host ports
• USB hubs and docking stations managing downstream port power allocation
• Wall adapter cables utilizing mini-USB or micro-USB connectors for portable equipment charging

Analog Switches - Special Purpose Procurement Notes

Verify the specific ordering suffix ZHEX corresponds to the TQFN-16 package and reel/cut-tape packaging configuration as listed in official distributor catalogs. Confirm RoHS compliance status through the manufacturer's latest documentation before finalizing procurement specifications.

Analog Switches - Special Purpose Selection Notes

Select this component when designing systems requiring integrated USB charging detection and power switching in a single package. Ensure the application supports the required 4.5 V to 5.5 V input voltage range and utilizes external resistors on ILIM_HI and ILIM_LO pins to set appropriate current limit thresholds for the target load.

Analog Switches - Special Purpose Part Context

This part belongs to the PI5USB254x series of USB charging controllers. It shares functional similarities with models like the PI5USB2546AZHEX but may differ in specific control pin configurations or integrated features. It serves as a solution for managing power delivery and data line integrity in USB 2.0 compliant charging environments.

Analog Switches - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with alternative Diodes Incorporated models such as the PI5USB2546AZHEX by cross-referencing pinouts and electrical specifications in official datasheets.

Analog Switches - Special Purpose FAQ

How does the PI5USB2544 handle high-speed USB device recognition?

The device distinguishes between full-speed and high-speed devices by memorizing if the D+ line goes low after connection. High-speed negotiation requires removing the 1.5K pull-up resistor, which the controller detects to differentiate from legacy full-speed devices.

What is the purpose of the OUT discharge function?

The OUT discharge function allows the charging port to renegotiate current with a portable device. It turns off the power switch, discharges the OUT pin, and then reasserts the voltage to facilitate proper power management handshaking.

Can the PI5USB2544 support SuperSpeed (USB 3.0) data lines?

No. The data switches are designed for USB 2.0 differential pairs only. SuperSpeed differential pairs must be routed directly to the USB connector without passing through the PI5USB2544.