Monolithic Power Systems Inc. EV1906-S-00A

Overview

EV1906-S-00A from Monolithic Power Systems is an evaluation board for the MP1906 80V half-bridge gate driver IC, configured to drive two external N-MOSFETs (Si4100DY) in a synchronous half-bridge topology with 12V gate supply, 200kHz switching frequency, and internal 150ns dead time. It integrates NE555-based PWM generation and MP2016 LDO for 5V logic rail.

For engineers reviewing the EV1906-S-00A datasheet, EV1906-S-00A pinout, EV1906-S-00A application, or EV1906-S-00A equivalent, this board enables rapid validation of MP1906's shoot-through prevention, 80ns propagation delay, undervoltage lockout behavior, and high-side/low-side timing under real 80V power stage conditions.

Technical Context

The EV1906-S-00A implements a fixed half-bridge test configuration where HPWM and LPWM are tied together and driven by an on-board NE555 oscillator generating 200kHz, 50% duty-cycle PWM. VPOWER (0–80V) supplies the MOSFET bridge, while VDD (10–16V) powers the MP1906 gate driver logic and output stages.

Board-level protection includes input overlap prevention via internal logic, independent UVLO on both high- and low-side channels, and GND-isolated power domains for VCC_12V (driver), VCC_5V (logic), and VPOWER (power stage). SW node access allows direct load connection with 20V/div oscilloscope probing capability.

Key Specifications

Availability

EV1906-S-00A is available at Aetrix Electronics and suitable for motor control prototyping, half-bridge DC-DC converter development, and avionics power supply qualification requiring stable component supply and documented reference performance.

Supply support for EV1906-S-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 design centers across Asia and North America and global distribution.

The MP1906 product line targets high-efficiency, high-voltage power conversion systems requiring robust gate driving, precise timing control, and integrated safety features - specifically optimized for half-bridge topologies in motor drives and isolated DC-DC converters.

FAQ

What is the purpose of the NE555 on the EV1906-S-00A board?

The NE555 timer generates a fixed 200kHz, 50% duty-cycle PWM signal that drives both HPWM and LPWM inputs simultaneously. This simplifies initial evaluation by eliminating the need for external signal generators while maintaining consistent timing for dead-time verification and gate-drive waveform analysis.

Can the EV1906-S-00A be used with external PWM controllers?

Yes - HPWM and LPWM pins are brought out to test points and jumpers (JP2, JP3), allowing direct injection of independent high- and low-side PWM signals. The board's default tie-together configuration can be disabled by removing zero-ohm resistors R2 and R4 to enable complementary or phase-shifted drive schemes.

What MOSFETs are installed on the EV1906-S-00A?

The board uses two Vishay Si4100DY 80V, 42mΩ N-channel MOSFETs in SO-8 package, mounted in a half-bridge arrangement with SW node accessible via solder pad. Their RDS(on) and voltage rating match MP1906's 80V drive capability and thermal validation requirements.

Does the board include overcurrent or thermal protection?

No discrete overcurrent or thermal protection circuitry is implemented. Protection relies on MP1906's built-in features: undervoltage lockout on both channels and input overlap prevention. Users must add external current sensing or thermal monitoring for system-level fault handling during prototype integration.

How is the 5V logic rail generated?

A dedicated MP2016 5V, 30mA LDO (U3 in TSOT23-5 package) regulates VCC_12V down to VCC_5V, powering the NE555 timer and providing clean logic-level bias for MP1906 input stages - decoupled with 0.1μF (C5) and 1μF (C9) ceramics per datasheet recommendations.

Is the EV1906-S-00A RoHS-compliant?

Yes - all components listed in the Bill of Materials, including the MP1906R2 IC, Si4100DY MOSFETs, NE555D timer, and passive elements, are lead-free and comply with the RoHS directive. MPS confirms green status for this evaluation board on its official Quality Assurance page.