Monolithic Power Systems Inc. MP2672AGD-0000-P

Overview

MP2672AGD-0000-P from Monolithic Power Systems is a 2-cell Li-ion/Li-polymer boost switching charger IC with integrated cell balancing, NVDC power path management, and dual-mode (standalone/I²C) configuration. It delivers up to 2A charge current at 8.4V–8.8V battery regulation with 0.5% accuracy, operates from 4.0V–5.75V input, and supports JEITA-compliant NTC temperature monitoring for portable POS machines and Bluetooth speakers.

For engineers reviewing the MP2672AGD-0000-P datasheet, MP2672AGD-0000-P pinout, MP2672AGD-0000-P application, or MP2672AGD-0000-P equivalent, key selection considerations include its QFN-18 package thermal performance (θJA = 70°C/W), I²C-configurable safety timers (up to 20 hours), and hardware-selectable charge voltage thresholds (8.4V–8.8V) in standalone mode.

Technical Context

The MP2672A implements a synchronous boost topology with integrated high-side (RON_Q2 = 28–40 mΩ) and low-side (RON_Q1 = 54–70 mΩ) MOSFETs, operating at 1.1–1.44 MHz. Its NVDC architecture separates system (SYS) and battery (BATT) power paths using an internal linear FET (RON_Q3 = 22–40 mΩ), enabling instant system startup even with deeply discharged batteries.

Cell balancing is implemented via dedicated high-side/low-side balance FETs (RON_BHS = 2.1 Ω, RON_BLS = 1.3 Ω) triggered when inter-cell voltage mismatch exceeds 50–70 mV. Charge sequencing includes preconditioning (VBATT_PRE = 6.05–6.75 V), constant-current (up to 2 A), and constant-voltage phases with ±0.5% regulation accuracy and 450 mV recharge threshold.

Key Specifications

Pinout & Package

The MP2672AGD-0000-P is housed in a thermally enhanced QFN-18 (2 mm × 3 mm) package with exposed thermal pad. Pin numbering follows standard top-down view (pin 1 at top-left corner, counterclockwise).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-cell Li-ion boost charger applications.

Compared with BQ25895RTWR and MAX77751EWW+T, the MP2672AGD-0000-P uniquely integrates cell balancing, NVDC path, and JEITA NTC support in a 2 mm × 3 mm QFN-reducing solution size by 35% and eliminating 6 external components required by alternatives.

Availability

MP2672AGD-0000-P is available at Aetrix Electronics and suitable for Point-of-Sale terminals, Bluetooth speakers, and e-cigarette devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2672AGD-0000-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 power management ICs, with over 20 years of expertise in DC/DC converters, battery chargers, and motor drivers.

The MP2672A belongs to MPS's battery management product line, engineered specifically for compact, high-efficiency 2-cell Li-ion charging in portable consumer electronics where thermal density, safety compliance, and board space are critical constraints.

FAQ

What is the function of the MID pin in the MP2672AGD-0000-P?

The MID pin measures the midpoint voltage between two series-connected Li-ion cells and serves as the reference node for the integrated cell balancing circuit. When enabled, it allows the IC to detect voltage mismatch (>50 mV) and actively equalize cells using internal high-side and low-side balance FETs (RON_BHS = 2.1 Ω, RON_BLS = 1.3 Ω). Connecting MID to AGND disables balancing.

How does the NVDC power path operate during battery preconditioning?

During preconditioning (VBATT < VBATT_PRE), the MP2672AGD-0000-P regulates SYS to VBATT_PRE + 300 mV while linearly controlling the battery FET (Q3) to deliver 230–410 mA pre-charge current. This ensures immediate system power-up even with 0 V battery, while safely recovering deeply discharged cells without thermal stress.

Can the MP2672AGD-0000-P operate without an external inductor?

No. The MP2672AGD-0000-P requires an external 1.5 µH power inductor (typical value) connected between the SW and IN pins to implement its synchronous boost converter. Omitting the inductor prevents energy transfer, disables charging, and may damage internal MOSFETs due to uncontrolled current spikes.

What is the maximum allowable charge current in host-control mode?

The maximum charge current in host-control mode is capped by the ISET resistor value, not just I²C register settings. With RISET = 6 kΩ, the hardware limit is 2.2 A (typical); configuring higher I²C values beyond this has no effect. This dual-limit design ensures safety even if firmware misconfigures registers.

How does the ACOK pin indicate valid input supply?

The ACOK pin is an open-drain output pulled low when VIN is between the UVLO falling threshold (3.45 V typical) and OVLO rising threshold (6.0 V typical). It remains high-impedance outside this window, allowing external pull-up to system rail. This signal enables host microcontrollers to validate adapter presence before enabling charging.

Is the MP2672AGD-0000-P compatible with non-JEITA NTC thermistors?

Yes-the NTC pin accepts any negative temperature coefficient thermistor. However, JEITA-compliant behavior (cold/cool/warm/hot thresholds) requires configuring the voltage divider to match the specified VCC percentage thresholds (70%, 63%, 40.4%, 34.5%). Non-JEITA profiles require custom I²C register tuning of the NTC comparator windows.

What thermal derating applies above 25°C ambient?

With θJA = 70°C/W, the MP2672AGD-0000-P dissipates up to 1.78 W at 25°C. Above that, allowable power drops linearly: at 60°C ambient, max dissipation is (150 − 60) / 70 = 1.29 W. Internal thermal regulation begins reducing charge current above 125°C junction temperature to sustain safe operation.