Monolithic Power Systems Inc. MP6922AGS-P

Overview

MP6922AGS-P from Monolithic Power Systems is a dual-channel, fast-turn-off intelligent rectifier IC designed for synchronous rectification in LLC resonant converters. It drives two N-channel MOSFETs, regulates forward voltage drop to 30mV, achieves 20ns total turn-off delay, supports up to 300kHz switching, and features reverse-current protection and light-load latching for <600μA quiescent current - deployed in AC-DC adapters and LCD TV power supplies.

For engineers reviewing the MP6922AGS-P datasheet, MP6922AGS-P pinout, MP6922AGS-P application, or MP6922AGS-P equivalent, key selection criteria include V_DS regulation accuracy (±15mV), dual-channel timing coordination, SOIC14 package thermal resistance (θ_JA = 86°C/W), and compatibility with both standard and logic-level MOSFETs in CCM/CrCM/DCM operation.

Technical Context

The MP6922AGS-P implements adaptive gate control per channel using high-voltage drain-sense inputs (VD1/VD2) referenced to VS1/VS2 and common VSS. Its blanking circuit enforces 1μs minimum ON-time and dynamically adjusts turn-off threshold from +30mV to +100mV during turn-on to suppress ringing-induced false triggering.

Reverse-current protection operates via RCP pin monitoring: when voltage exceeds 3V (typ), a 150μs latch disables both gate drivers to prevent shoot-through in high-frequency CCM center-tapped topologies. Light-load mode activates when MOSFET conduction period falls below 2.2μs, delaying latch-off by 160μs and unlatching upon body-diode conduction >2.4μs.

Key Specifications

Pinout & Package

MP6922AGS-P is supplied in SOIC14 package with exposed pad (PGND) for enhanced thermal performance (θ_JA = 86°C/W, θ_JC = 38°C/W). Pin 1 is VG1; pin 14 is PGND; pins 5 and 10 are NC; pin 11 is RCP; pin 4 is LL.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel synchronous rectifier controller applications.

Compared with MP6922AGN and UCC24612-2, MP6922AGS-P uniquely combines SOIC14 thermal performance, programmable light-load timing via LL pin, and dedicated RCP protection-making it optimal for high-reliability, multi-mode LLC systems requiring precise timing control and robust fault handling.

Availability

MP6922AGS-P is available at Aetrix Electronics and suitable for AC-DC adapters, LCD TV power supplies, and telecom SMPS requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP6922AGS-P 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 MP6922 series belongs to MPS's intelligent rectifier product line, engineered specifically for high-efficiency synchronous rectification in resonant converters - emphasizing fast turn-off, multi-mode operation support, and integrated protection functions.

FAQ

What is the function of the LL pin on MP6922AGS-P?

The LL (Light-Load) pin accepts an external resistor to set the 2.2μs light-load pulse width (τ_LL = R_LL × 100kΩ). When MOSFET conduction period drops below this threshold, the IC enters light-load mode after a 160μs delay, latching off gate drivers to limit quiescent current to <600μA - critical for meeting Energy Star 0.5W standby requirements.

How does the RCP pin provide reverse-current protection?

The RCP pin monitors a voltage divider across the synchronous MOSFET's drain-source. When voltage exceeds 3V (typical threshold), the IC latches both gate drivers for 150μs (τ_RCP) to prevent shoot-through during high-frequency reverse current in CCM operation - a hardware-based solution eliminating need for external protection circuitry.

Can MP6922AGS-P drive logic-level MOSFETs?

Yes. MP6922AGS-P supports both standard and logic-level N-channel MOSFETs. Its gate driver delivers 14.5V high-level output (V_DD >16V) and 3A pull-down current, ensuring full enhancement of logic-level devices with V_GS(th) as low as 1V while maintaining 30mV V_DS regulation accuracy across temperature.

What is the significance of the SOIC14 package's exposed PGND pad?

The exposed PGND pad on the SOIC14 package reduces thermal resistance to 38°C/W (junction-to-case) and 86°C/W (junction-to-ambient), improving power dissipation capability by 32% versus SOIC8. This enables sustained 1.5W operation at +125°C ambient without thermal shutdown - essential for high-density telecom and industrial power designs.

Does MP6922AGS-P support discontinuous-conduction mode (DCM)?

Yes. MP6922AGS-P explicitly supports DCM, CCM, and critical conduction mode (CrCM). In DCM/CrCM, its control circuitry turns off the gate when MOSFET current approaches zero; in CCM, it uses fast transient detection (20ns turn-off delay) to terminate conduction before reverse current onset - verified in LLC resonant converter applications.

How does the blanking function prevent false triggering?

The blanking function enforces a 1μs minimum ON-time and temporarily raises the turn-off threshold from +30mV to +100mV during turn-on. This suppresses false triggering caused by voltage ringing on VD1/VD2 pins, ensuring reliable operation even with fast-switching MOSFETs and minimal external snubbing components.

Is MP6922AGS-P RoHS-compliant and halogen-free?

Yes. MP6922AGS-P is lead-free and fully compliant with the RoHS directive. It is also halogen-free per IEC 61249-2-21, with all materials certified to meet JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and qualified for reflow soldering up to 260°C peak temperature.