Monolithic Power Systems HR1001

Description

The HR1001 is an enhanced LLC controller which provides new features of adaptive dead time adjustment (ADTA) and capacitive mode protection (CMP).

The adaptive dead time adjustment automatically inserts a dead time between the two complimentary gate outputs. This is ensured by keeping the outputs off while sensing the dv/dt current of the half-bridgeswitching node. The ADTA features easier design, lower EMI, and higher efficiency.

HR1001 incorporates anti-capacitive mode protection which prevents potentially destructive capacitive mode switching if the output isshorted or has a severe over load. This feature protects the MOSFET during abnormal condition, making the converter robust.

HR1001 has a programmable oscillator that sets both the maximum and minimum switching frequencies. It starts up at a programmedmaximum switching frequency and decays until the control loop takes over to prevent excessive inrush current.

HR1001 enters a controlled burst-mode operation at light-load to minimize the power consumption and tighten output regulation.

HR1001 provides rich protection features which include two-level OCP with external latch shutdown, auto-recovery, brown in/out, CMP, and OTP, improving converter design safety with minimal extra components.

Features

• Adaptive dead-time adjustment
• Capacitive mode protection
• 50% Duty Cycle, Variable Frequency Control For Resonant Half-Bridge Converter
• 600V High-Side Gate Driver with Integrated Bootstrap Diode with High dv/dt immunity
• High-Accuracy Oscillator
• Operates up to 600kHz
• Two-Level Over-Current Protection:Frequency-Shift and Latched Shutdown with Programmable Duration Time
• Latched Disable Input for Easy Protections
• Remote ON/OFF Control and Brown-Out Protection through the BO Pin
• Programmable Burst-Mode Operation at Light-Load
• Non-Linear Soft-Start for Monotonic Output Voltage Rise
• SOIC-16 package

Remarks;L5=180uH L6=14uH And TI UsedRefer page no.22

Typical applications

• AC-DC Adapter, Open-Frame SMPS
• Video Game Consoles
• Desktop PCs and Servers
• Telecom SMPS
• LCD and PDP TVs
• Electronic Lighting Ballast

More information

• Datasheet
• IC product information