Monolithic Power Systems Inc. MP6960GS

Overview

MP6960GS from Monolithic Power Systems is a synchronous rectification controller with integrated CC/CV regulation for flyback converters, operating in CCM/DCM/QR topologies. It delivers 70mV forward-drop regulation, 20ns total turn-off delay, <300μA light-load quiescent current, and supports both high-side and low-side MOSFET configurations - deployed in notebook adapters and industrial AC-DC power supplies.

For engineers reviewing the MP6960GS datasheet, MP6960GS pinout, MP6960GS application, or MP6960GS equivalent, key selection criteria include its dual-loop CC/CV feedback architecture, SOIC8 package compatibility, fast 20ns turn-off propagation, ±0.5% 2.5V reference accuracy, and opto-coupler-based primary-side communication for isolated power systems.

Technical Context

The MP6960GS integrates two independent op-amps (1MHz GBW) for voltage and current regulation loops, each referenced to a precision 2.5V (±0.5%) and 25mV (±5%) internal reference. Its gate driver features adaptive self-regulation to maintain V_DS ≈ −70mV during conduction and triggers turn-off at −30mV with 20ns total delay.

It implements blanking logic (1.6µs minimum on-time, 200ns turn-off blanking), UVLO (5.6V rising, 1V hysteresis), thermal shutdown (150°C), and light-load latch-off mode activated by pulse-width threshold detection (V_LL-GS = 1.0V, V_LL-DS = −250mV) to reduce I_q to <300μA.

Key Specifications

Pinout & Package

MP6960GS is housed in an industry-standard SOIC8 package (JEDEC MS-012, variation AA), with 1.27mm pitch, 3.9mm × 4.9mm body, and exposed pad not present. Thermal resistance θ_JA = 90°C/W on 4-layer PCB.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous rectification with CC/CV control applications.

Compared with NCP4306DR2G and discrete SiHP20N60E-based solutions, MP6960GS delivers superior light-load efficiency, tighter reference accuracy, and faster turn-off - making it optimal for compact, high-efficiency, standards-compliant flyback adapters and chargers.

Availability

MP6960GS is available at Aetrix Electronics and suitable for laptop adapters, industrial flyback PSUs, battery charging systems, and distributed power architectures requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MP6960GS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP6960GS belongs to MPS's intelligent synchronous rectifier product line, engineered specifically for high-efficiency, isolated AC-DC conversion in space-constrained, thermally demanding applications such as portable adapters and industrial power supplies.

FAQ

What is the maximum V_D voltage the MP6960GS can safely sense?

The MP6960GS VD pin supports −0.7V to +40V relative to GND per absolute maximum ratings. This allows reliable operation with 36V-rated MOSFETs in 24V-output systems, including transient clamping margins. Exceeding +40V risks permanent damage to the internal ESD structure.

How does the MP6960GS achieve 70mV forward-drop regulation?

It uses real-time V_DS monitoring and adaptive gate drive: when V_DS rises above −70mV during conduction, the controller reduces VG to increase MOSFET R_DS(on), dynamically balancing conduction loss and gate drive loss - no external compensation is needed.

Can MP6960GS be used with high-side MOSFET configurations?

Yes - the datasheet explicitly states support for both high-side and low-side rectification. For high-side use, VSS connects to the MOSFET source (now at output potential), VD senses drain (at transformer secondary), and VG drives the gate referenced to VSS.

What is the purpose of the 1.6µs minimum on-time blanking period?

This blanking prevents false turn-off during MOSFET turn-on transients. During this interval, the turn-off threshold is raised to +50mV instead of −30mV, ensuring robust operation even with fast-rising V_DS edges - critical for preventing shoot-through in CCM flyback.

How does the light-load latch-off mode reduce power consumption?

When conduction time falls below the programmable t_LL threshold (e.g., 2µs), the gate driver latches off and enters ultra-low-power state. Only the CC/CV comparators remain active, drawing <300μA - eliminating gate drive losses while preserving regulation readiness.

Is the 2.5V voltage reference internally trimmed?

Yes - the 2.5V bandgap reference is factory-trimmed to ±0.5% accuracy at 25°C and maintains ±0.6% over 0°C to 85°C, enabling high-precision CV regulation without external calibration components.

Does MP6960GS require external components for CC/CV loop stability?

No - the two integrated op-amps feature unity-gain stable architecture with 1MHz GBW. Compensation is achieved via standard RC networks on VFB and IFB pins (e.g., 100pF + 10kΩ), as validated in MPS application note AN105.