Dual USB Charger Adapter Emulator

Industry's First Dual Channel USB Charger Adapter Emulators Optimized for Dedicated Chargers

Description

The MAX14667 is a dual USB charger adapter emulator with automatic host charger identification circuitry for USB dedicated chargers.

The device allows USB wall adapters, travel chargers, and other dedicated chargers to identify themselves as a USB dedicated charger to USB devices, an Apple charger to Apple products, and a Samsung Galaxy Tablet dedicated charger port to Samsung Galaxy Tablet devices.

The device features a control input that allows for charger mode selection. The MAX14667 supports USB Battery Charger (BC) revision 1.2 specification compliant devices, including all major brand USB devices from Samsung, Nokia, Blackberry, LG, Apple devices, and Samsung Galaxy devices in autodetection 1A or autodetection 2A modes.

The MAX14667 is available in an 8-pin (2.9mm x 1.6mm) SOT23 package, and is specified over the -40°C to +85°C extended temperature range.

Key Features

Optimized for Charging Adapters
- Flexible Device and Adapter Connection Order
Faster Charging
- Apple 2A Charging Capability
- Samsung Galaxy Tablet 2A Charging Capability
Improved Charger Interoperability
- Meets New USB BC Revision 1.2 Specification
- Supports Samsung Galaxy Smartphones
- Backwards Compatible with Previous USB BC Revisions
- Meets China YD/T1591-2009 Charging Specification
Greater User Flexibility
- CB_ Pins Control Charger Mode
Saves Space on Board
- 2.9mm x 1.6mm, 8-Pin SOT23 Package
- High-ESD Human Body Model (HBM) Protection on DP and DM

MAX258EVKIT

Evaluation Kit for the MAX258

Description

The MAX258 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the MAX258 push-pull transformer driver. The EV kit operates from a single 3.0V to 5.5V supply and the on-board 1CT:1.3CT turns-ratio transformer sets the output voltage.

The EV kit provides up to 90% overall efficiency at 5V with up to 2.3W output power using a push-pull isolated DC-DC converter. Undervoltage lockout and thermal shutdown provide for a robust isolated supply. The surface-mount transformer provides galvanic isolation with the output powered from a push-pull rectifier circuit, reducing the output-voltage ripple.

The EV kit circuit is configured as a push-pull rectifier, with an output voltage that follows the input voltage. The EV kit is also configurable for other topologies including bipolar outputs and full-wave rectification.

Key Features

3.0V to 5.5V Operating Voltage Range
Up to 90% Efficiency
Push-Pull Rectified Output
Configurable Bipolar Outputs or Full-Wave Rectifier
Proven PCB Layout
Fully Assembled and Tested