The STUSBCD01B is a USB charger detection IC from ST company, which can detect dedicated USB chargers, Host/Hub chargers or standard host ports connected to the USB DP/DM data lines. The device implements two different detection methods in order to be able to distinguish between a dedicated charger and a Host/Hub charger. Operation is controlled through three general purpose I/O pins; a hardware open drain detection output is also available. An internal regulator provides the 1.8 V supply voltage for the internal blocks and state machine while a clamping device prevents VBUS voltage from going over 6 V (typ.). The STUSBCD01B is available in a 12 bumps Flip-Chip 0.4 mm pitch package.
The STMicroelectronics STUSBCD01B is an integrated circuit designed to provide USB charger detection functionality for platforms lacking this feature in their PHY. It operates with a supply voltage ranging from 2.2 V to 4.5 V and includes an internal regulator that generates the required 1.8 V for internal blocks.
The device implements two distinct detection methods selectable via the STATUS/METHOD pin: a dedicated charger detection method using current sources/sinks on DP/DM lines, and a current sink method based on USB battery charging spec v1.0. It features an active high open drain hardware detection pin (DETECT) and supports over-voltage protection up to 6 V.
| Supply voltage range (VBAT) | 2.2 V to 4.5 V |
|---|---|
| Interface voltage range (Vio) | 1.6 V - 2.8 V |
| VBUS clamping voltage | 6 V |
| ESD protection (HBM) | +2 kV |
| Package type | Flip-Chip 12 bumps |
| Pin pitch | 0.4 mm |
The device supports a dedicated charger detection method and a current sink method for Host/Hub chargers.
It uses a current source on the DP pin and a current sink on the DM pin to detect the resistor connecting them.