Monolithic Power Systems Inc. MP6922AGSE

Overview

MP6922AGSE 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 CCM/CrCM/DCM operation, and integrates reverse-current protection - enabling high-efficiency AC-DC adapters and LCD TV power supplies.

For engineers reviewing the MP6922AGSE datasheet, MP6922AGSE pinout, MP6922AGSE application, or MP6922AGSE equivalent, key selection criteria include its 30mV V_DS regulation accuracy, 300kHz max switching frequency, SOIC8 package thermal resistance (θ_JA = 90°C/W), light-load latch-off function (<600μA quiescent current), and dual-channel independent sensing with PGND-referenced power ground.

Technical Context

The MP6922AGSE implements adaptive gate control using dual high-voltage drain-sense inputs (VD1/VD2) referenced to VS1/VS2 and common VSS, with blanking logic enforcing 1μs minimum ON-time and dynamic turn-off threshold adjustment (–30mV → +100mV during blanking). Its internal JFET-based high-voltage input handles up to 180V drain swings while maintaining accurate low-V_DS detection.

Reverse-current protection operates via RCP pin monitoring: when voltage across an external divider exceeds 3.0V (typ), the IC latches both gate drivers for 150μs (typ) to prevent shoot-through in high-frequency CCM operation. Light-load mode triggers after 160μs delay when MOSFET conduction period falls below 2.2μs, reducing ICC to ≤600μA.

Key Specifications

Pinout & Package

MP6922AGSE is housed in an 8-pin SOIC package (SOIC8) with exposed pad not connected (non-PGND). Pin 1 is VG2 (MOSFET 2 gate driver output); Pin 2 is EN (enable input with 3.0V UVLO threshold); Pin 3 is VD2 (MOSFET 2 drain sense); Pin 4 is VS2 (MOSFET 2 source reference); Pin 5 is VS1 (MOSFET 1 source reference); Pin 6 is VD1 (MOSFET 1 drain sense); Pin 7 is VDD (8–24V supply input); Pin 8 is VG1 (MOSFET 1 gate driver output). Pin 2 (EN) and Pin 7 (VDD) are critical for startup sequencing and bias stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCP4306DR2G and SiHP22N60E+MP6901, MP6922AGSE delivers true dual-channel coordination, 30mV regulation accuracy, and integrated protection in one SOIC8 package - reducing component count, PCB area, and system-level timing calibration effort for mid-power LLC designs.

Availability

MP6922AGSE 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 continuity, and RoHS-compliant sourcing.

Supply support for MP6922AGSE 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 MP6922A product line targets high-efficiency resonant converter applications, specifically addressing the need for intelligent, low-loss synchronous rectification in space-constrained, thermally sensitive AC-DC systems.

FAQ

What is the maximum drain voltage the MP6922AGSE can sense on VD1 and VD2 pins?

The MP6922AGSE supports drain voltage sensing from –0.7V to +180V on both VD1 and VD2 pins. This rating is enabled by an integrated high-voltage JFET input stage, allowing direct connection to MOSFET drains in high-voltage LLC secondaries without external level-shifting or clamping components.

Does MP6922AGSE require external components for light-load mode activation?

No - MP6922AGSE implements fixed-threshold light-load mode in SOIC8 (MP6922AGSE) and SOIC8E packages, entering latch-off automatically when MOSFET conduction period falls below 2.2μs. The SOIC14 variant (MP6922AGS) adds an external LL pin for resistor-programmable timing, but AGSE uses internal default values.

How does the reverse-current protection function interface with the power stage?

The RCP pin accepts a voltage divider from the MOSFET drain-to-source node. When reverse current causes V_DS to exceed –300mV, the resulting voltage on RCP crosses 3.0V (typ), triggering a 150μs latch that disables both gate drivers. This prevents shoot-through in center-tapped full-wave rectifiers operating in high-frequency CCM.

Can MP6922AGSE drive both standard and logic-level MOSFETs simultaneously?

Yes - MP6922AGSE's gate drivers deliver 14.5V (typ) high-side output when VDD >16V and VDD–2.2V when VDD <16V, supporting both 10V-gate and 4.5V-gate MOSFETs. Its 3A pull-down capability ensures fast turn-off even with high-C_iss devices, and the 30mV regulation adapts to varying R_DS(on) across device types.

What thermal derating applies to MP6922AGSE in SOIC8 package at 85°C ambient?

With θ_JA = 90°C/W and T_J(MAX) = 150°C, maximum continuous power dissipation at 85°C ambient is (150–85)/90 = 0.72W. This aligns with the datasheet's 1.4W rating at 25°C ambient and confirms need for thermal relief pads or airflow in >50W designs.

Is the exposed pad on MP6922AGSE electrically connected or thermal-only?

The exposed pad on MP6922AGSE is not electrically connected - it serves solely as a thermal enhancement feature. Datasheet Package Information confirms "PGND" is assigned to Pin 2 (EN) and Pin 1 of SOIC8E, but SOIC8 (AGSE) has no internal connection to the pad; it must be soldered to a thermal plane for optimal heat dissipation without electrical routing.