Monolithic Power Systems Inc. EV2617B-L-00A

Overview

EV2617B-L-00A from Monolithic Power Systems is an evaluation board for the MP2617B 3A, 1-cell Li-ion switching battery charger IC with NVDC power path management. It supports dual-input (USB/adapter), programmable input current limits (450mA–3A), 1.6MHz operation, and simultaneous system power delivery and battery charging in portable devices such as smartphones and GPS units.

For engineers reviewing the EV2617B-L-00A datasheet, EV2617B-L-00A pinout, EV2617B-L-00A application, or EV2617B-L-00A equivalent, this board enables rapid validation of MP2617B's smart power path control, thermal fold-back regulation, input voltage clamping (4.71V), and SYS voltage programming via external resistors - critical for USB-compliant portable power designs.

Technical Context

The EV2617B-L-00A implements a complete reference design for the MP2617B IC, featuring a synchronous buck regulator delivering up to 3A SYS output while managing battery charge current up to 2A. Its five-loop control architecture includes input current limit, input voltage limit (VIN clamp = 4.71V), constant charge current, terminal battery voltage regulation, and on-die thermal fold-back.

Board-level configuration uses JP1/JM2 jumpers to select USB2.0 (450mA), USB3.0 (825mA), programmable (0–3A), or default adapter (2A) modes. SYS voltage is factory-set to 3.6V below 3.4V battery voltage and defaults to 4.4V when BATT is floating - both adjustable via R6/R7 resistor divider per VSYS = 1.152V × (R6 + R7)/R7.

Key Specifications

Availability

EV2617B-L-00A is available at Aetrix Electronics and suitable for smartphone power validation, portable terminal battery integration, and GPS device charging subsystem development requiring stable component supply and fast-turn evaluation support.

Supply support for EV2617B-L-00A 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 a focus on efficiency, integration, and reliability in power management solutions.

The MP2617B product line delivers highly integrated single-cell Li-ion charging with NVDC power path management, targeting space-constrained portable electronics where simultaneous system power and battery charging must coexist without compromising safety or thermal performance.

FAQ

What input sources does the EV2617B-L-00A support?

The board accepts both USB (via micro-USB connector or test points) and DC adapter inputs. Input current limits are selected using M0/M1 logic pins: USB2.0 (450mA), USB3.0 (825mA), programmable mode (0–3A), or default adapter mode (2A). JP1 and JP2 provide easy jumper-based configuration without soldering.

How is SYS output voltage configured on this evaluation board?

VSYS is set by a resistor divider (R6/R7) connected to the SYSFB pin per VSYS = 1.152V × (R6 + R7)/R7. Default behavior sets VSYS to 3.6V when VBATT < 3.4V, and to 4.4V when BATT is floating and R6/R7 are unpopulated. The board includes pads for R6/R7 to enable precise voltage tuning across the 3.5V–4.4V range.

Can the EV2617B-L-00A be used without a battery connected?

Yes - with BATT pin left floating, the MP2617B detects no-battery condition and holds VSYS at 4.4V (or programmed value). For DC-DC-only applications, SYS and BATT pins can be shorted to disable the linear charging path while retaining regulated SYS output, enabling use as a standalone 3A buck converter.

What indicators show charging status on the board?

LED1 (red) illuminates when charging is active; LED2 (green) lights when charging is complete (CHGOK asserted). These signals are driven directly by MP2617B's CHGOK and ACOK pins, providing real-time visual feedback without external logic - essential for quick functional verification during lab testing.

How is thermal protection implemented on this evaluation board?

Thermal regulation is handled entirely by the MP2617B IC, which integrates on-die temperature sensing and automatic fold-back of charge current when junction temperature exceeds safe thresholds. The board layout uses generous copper pour on both layers and exposes PGND pads to enhance heat dissipation - validated for continuous 2A charging at ambient temperatures up to 50°C.

Is the EV2617B-L-00A RoHS-compliant and lead-free?

Yes - all components on the EV2617B-L-00A board meet RoHS Directive requirements and are lead-free. Monolithic Power Systems certifies full compliance for the MP2617B IC and associated passive components, including Murata capacitors and Yageo resistors listed in the BOM. MPS green status documentation is available on their official website under Quality Assurance.