The RT7755GES series is specifically designed to work with controllers, such as the RT7206, to provide a total solution for USB PD or a programmable power adapter. This RT7755GES not only provides a high power efficiency control scheme, but also gives a 50mW very low standby power control under 5V standby condition.

The RT7755GES is such a special design to achieve a wide-range of output voltage by utilizing several innovations, including (1) By using DMAG pin, the RT7755GES senses output voltage to adjust loop gain for system stability, to adjust output over-voltage protection threshold voltage to protect external devices, and to adjust current limit to meet Limited Power Source (LPS) safety requirements; (2) The RT7755GES is also equipped with comprehensive protection features, including bulk-capacitor brown-in/brown-out protection, VDD over-voltage protection (VDD OVP), output over-voltage/under-voltage protection (Output OVP/UVP), secondary rectifier short-circuit protection (SRSP), and external over-temperature protection (External OTP); (3) For constant output power regulation, a resistor connected to CS pin can be used to achieve accurate line compensation across the universal input voltage range; and (4) The RT7755GES also provides various features to protect against any failures occurring at the secondary-side component, such as the RT7206 or a shunt regulator.

In applications, it is suggested that the RT7755GES be used with a secondary controller RT7206 to realize a robust and safe design to prevent all potential fault conditions due to misconnection of various devices, cables, plugs and receptacles.

应用

USB PD and Programmable Power Adapters

关键特性

Optimized for Adaptive Output Power

Wide VDD Range : 9V to 64V

Adaptive Output Over-Voltage Protection

Adaptive Over-Current Protection

Adaptive Loop Gain Control for Loop Stability

High Efficiency

Green Mode Operation at Light Load and No Load

Comprehensive Protection Features

Bulk-Capacitor Brown-In and Brown-Out Protection

VDD Over-Voltage Protection

Output Over-Voltage and Under-Voltage Protection

External Over-Temperature Protection

Secondary Rectifier Short-Circuit Protection

Programmable Line Compensation

Others

< 50mW in 5V Standby Mode for Power Saving

Driver Capability : 300mA/-300mA

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