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Monolithic Power Systems Inc. MP18831-A4BGLU-Z
- Part No.:
- MP18831-A4BGLU-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 13-VFLGA
- Datasheet:
-
MP18831-A4BGLU-Z.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 13LGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,241
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Product details
Overview
MP18831-A4BGLU-Z from Monolithic Power Systems is an isolated dual-input high-side/low-side half-bridge gate driver with 4A peak source/sink current, 50ns typical propagation delay, and configurable dead time via external resistor. It delivers 5kVRMS isolation (SOIC-16 WB), >100kV/µs CMTI, and operates across -40°C to +125°C for robust switching control in isolated DC/DC converters and offline AC/DC power supplies.
For engineers reviewing the MP18831-A4BGLU-Z datasheet, MP18831-A4BGLU-Z pinout, MP18831-A4BGLU-Z application, or MP18831-A4BGLU-Z equivalent, this device supports TTL/CMOS-compatible 2.8–5.5V primary-side logic, up to 30V secondary-side drive supply, and dual independent input control (INA/INB) with overlap protection-critical for high-efficiency, shoot-through–free half-bridge operation.
Technical Context
The MP18831-A4BGLU-Z implements capacitive-based galvanic isolation between primary and secondary sides, enabling reinforced insulation (UL 1577, VDE 0884-17) and functional isolation of ±1500V between secondary drivers in SOIC-16 packages. Its dual-channel architecture allows independent high-side and low-side gate drive with separate VDDA/VSSA and VDDB/VSSB rails.
Dead time is externally set via a resistor on the DT pin (2–150kΩ), yielding 10–1100ns range with <10ns matching tolerance. Input logic thresholds (1.6V high, 1.2V low) and internal pull-downs on INA/INB ensure noise-immune signal reception, while UVLO thresholds are fixed at 3V (A-grade) on both output supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS withstand (UL 1577, 60s), 6000VPK (VDE 0884-17), reinforced insulation in SOIC-16 WB package |
| Peak Output Current | 4A source/sink per channel-sufficient to drive 1200V SiC MOSFETs or 650V GaN HEMTs at high dV/dt |
| Propagation Delay | 50ns typical (INA→OUTA rising/falling)-enables >1MHz switching with minimal timing skew |
| CMTI | >100kV/µs-prevents false triggering during fast transients in high-power inverters and PFC stages |
| VDDI Range | 2.8V–5.5V-direct interface with 3.3V microcontrollers and 5V FPGA I/O without level-shifting |
| VDDA/VDDB UVLO | 3.2V threshold (A-grade)-ensures gate drive remains disabled until secondary supply stabilizes above safe turn-on voltage |
| Operating Temp | -40°C to +125°C junction-supports industrial and automotive under-hood power conversion applications |
Pinout & Package
LGA-13 (5mm × 5mm) package with exposed thermal pad; RoHS-compliant, halogen-free, MSL Level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GNDI | Primary-side ground reference for all input signals and control logic |
| 2 | INA | Non-inverting TTL/CMOS input for channel A; internally pulled down-tie to GNDI if unused |
| 3 | INB | Non-inverting TTL/CMOS input for channel B; internally pulled down-tie to GNDI if unused |
| 4 | VDDI | Primary-side supply (2.8–5.5V); two internal connections (pins 4 & 5 in SOIC) merged in LGA |
| 5 | EN/DIS | Enable/disable control: high-active EN or low-active DIS (internally biased-no external pull required) |
| 6 | DT | Dead time configuration node; connect 2–150kΩ resistor to GNDI to set 10–1100ns dead time |
| 8 | VSSB | Secondary-side ground for channel B-electrically isolated from VSSA and GNDI |
| 9 | OUTB | Gate drive output for low-side or high-side switch B; rated for 30V max swing relative to VSSB |
| 10 | VDDB | Channel B driver supply (4.2–30V); decoupled locally to VSSB with low-ESR capacitor |
| 11 | VSSA | Secondary-side ground for channel A-galvanically isolated from VSSB and GNDI |
| 12 | OUTA | Gate drive output for high-side or low-side switch A; rated for 30V max swing relative to VSSA |
| 13 | VDDA | Channel A driver supply (4.2–30V); decoupled locally to VSSA with low-ESR capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Dead Time | 10–1100ns via single external resistor-eliminates need for external logic or timers to prevent shoot-through |
| Dual Independent Inputs | INA and INB accept asynchronous TTL/CMOS signals-enables flexible PWM, phase-shifted, or burst-mode control topologies |
| High CMTI & Isolation | >100kV/µs transient immunity and 5kVRMS isolation-ensures reliable operation in noisy 3-phase inverters and EV chargers |
| Multiple UVLO Options | 3V UVLO (A-grade) on both VDDA and VDDB-guarantees gate drive only activates when secondary supplies exceed safe MOSFET turn-on threshold |
| Thermal Robustness | Rated for 125°C junction operation with 106°C/W θJA (LGA-13)-supports compact, convection-cooled designs in space-constrained systems |
Applications
| Industrial Motor Drives | Server & Telecom DC/DC Converters |
|---|---|
|
Use Scenario: Driving high-voltage IGBTs in 3-phase inverter stages for HVAC compressors and servo drives. IC Role / Device Role / Timing Role: Isolated half-bridge gate driver providing independent HS/LS control with precise dead-time management to prevent cross-conduction. Use Value: 50ns propagation delay and >100kV/µs CMTI maintain timing integrity during rapid bus transients in 600V+ systems. |
Use Scenario: Controlling synchronous rectifiers and primary-side switches in isolated 48V-to-12V/5V intermediate bus converters. IC Role / Device Role / Timing Role: Dual-channel isolated driver enabling high-frequency (500kHz–1MHz), zero-voltage-switching (ZVS) operation with minimal gate drive loss. Use Value: 4A peak current and 30V output supply support fast switching of low-RDS(on) GaN FETs, improving power density by >30% vs. non-isolated alternatives. |
| EV Onboard Chargers (OBC) | Renewable Energy Inverters |
|
Use Scenario: Gate driving SiC MOSFETs in bidirectional AC/DC and DC/DC stages of 11kW OBC modules. IC Role / Device Role / Timing Role: Reinforced-isolation driver delivering independent control of high-side and low-side switches in interleaved totem-pole PFC and LLC resonant converters. Use Value: UL 1577 and VDE 0884-17 certification ensures compliance with IEC 62109 and ISO 6469 safety requirements for automotive charging systems. |
Use Scenario: Driving high-voltage MOSFETs in string-level DC optimizers and microinverters for residential solar arrays. IC Role / Device Role / Timing Role: Isolated gate driver enabling direct connection to floating PV string potentials while maintaining communication-ground referenced control logic. Use Value: ±1500V functional isolation between secondary channels allows safe operation across 1000V+ PV strings without additional level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated half-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si823H4BB-IS | 4A peak drive, 5kVRMS isolation, but only 35ns propagation delay and no configurable dead time (fixed 100ns) | Preferred in ultra-high-frequency resonant converters where minimal delay dominates over dead-time flexibility | Select when system-level dead time is managed externally and sub-40ns timing is mandatory |
| ADUM4223BRIZ | 4A peak drive, 5kVRMS isolation, but uses iCoupler magnetic isolation (lower CMTI: 75kV/µs) and requires separate enable logic | Better suited for industrial PLC I/O modules where EMI immunity is less critical than component longevity | Select when long-term reliability in low-dV/dt environments outweighs need for highest CMTI |
Compared with Si823H4BB-IS and ADUM4223BRIZ, MP18831-A4BGLU-Z uniquely combines configurable dead time, >100kV/µs CMTI, and integrated dual-input logic-making it optimal for high-noise, high-power-density applications like EV OBCs and solar microinverters where timing precision and transient resilience are co-critical.
Availability
MP18831-A4BGLU-Z is available at Aetrix Electronics and suitable for industrial motor drives, server DC/DC converters, EV onboard chargers, and renewable energy inverters requiring stable component supply across extended product lifecycles.
Supply support for MP18831-A4BGLU-Z 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, founded in 1997 and headquartered in Kirkland, Washington.
The MP18831 product line delivers isolated gate drivers optimized for high-efficiency, high-reliability power conversion in EV, industrial, and renewable energy systems-emphasizing robust isolation, fast timing, and design simplicity.
FAQ
What is the UVLO threshold for MP18831-A4BGLU-Z on the secondary-side supplies?
The "A" suffix denotes a 3V UVLO threshold on both VDDA and VDDB, with typical activation at 3.2V and hysteresis of 300mV. This ensures gate drive remains disabled until secondary supplies stabilize above the minimum required for safe MOSFET turn-on, preventing partial enhancement and shoot-through risk.
Can MP18831-A4BGLU-Z drive both high-side and low-side switches in a half-bridge configuration?
Yes-it supports configurable half-bridge topology with independent OUTA and OUTB outputs, each referenced to its own isolated ground (VSSA/VSSB). The device accepts two independent inputs (INA/INB) and provides overlap protection plus externally adjustable dead time to prevent shoot-through in HS/LS configurations.
What package type does MP18831-A4BGLU-Z use, and what are its thermal characteristics?
MP18831-A4BGLU-Z uses the LGA-13 (5mm × 5mm) package with exposed thermal pad. Its junction-to-ambient thermal resistance (θJA) is 106°C/W, and maximum continuous power dissipation is 1175mW at 25°C ambient-enabling operation up to 125°C junction temperature with appropriate PCB copper area.
How is dead time configured on MP18831-A4BGLU-Z?
Dead time is set using an external resistor (2–150kΩ) between the DT pin and GNDI. Typical values yield 130ns (20kΩ) or 900ns (100kΩ), with <10ns channel-to-channel matching. A ≥220pF ceramic capacitor in parallel improves noise immunity without affecting timing accuracy.
Does MP18831-A4BGLU-Z support both enable (EN) and disable (DIS) logic polarities?
Yes-the EN/DIS pin supports dual logic modes: pulling the pin high enables the driver (EN mode), while pulling it low disables it (DIS mode). Internal biasing eliminates need for external pull resistors, simplifying interface with either active-high or active-low controller outputs.
What safety certifications apply to MP18831-A4BGLU-Z in the LGA-13 package?
In LGA-13, MP18831-A4BGLU-Z is certified to UL 1577 (2.5kVRMS, 60s), DIN EN IEC 60747-17 (3535VPK), and CQC GB 4943.1-2011 (basic insulation, 480VP working voltage). It meets pollution degree 2 and climatic category 40/125/21 per IEC 60664-1.
Is there a difference between MP18831-A4BGLU and MP18831-A4BGLU-Z?
Yes-MP18831-A4BGLU-Z includes the "-Z" tape-and-reel suffix per MPS ordering conventions, indicating standard packaging for automated SMT placement. Electrically and functionally identical to MP18831-A4BGLU, with no performance or specification differences.
MP18831-A4BGLU-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 13-VFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 65ns, 65ns
- Pulse Width Distortion (Max):
- 6ns
- Rise / Fall Time (Typ):
- 10ns, 10ns
- Current - Output High, Low:
- 4A, 4A
- Current - Peak Output:
- 4A
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 0V ~ 30V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 13-LGA (5x5)
- Approval Agency:
- CQC, UL, VDE
MP18831-A4BGLU-Z FAQ
1.How can I place an order for MP18831-A4BGLU-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP18831-A4BGLU-Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MP18831-A4BGLU-Z reliable?
The price and inventory of MP18831-A4BGLU-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP18831-A4BGLU-Z is usually 5 days.
3.What payment methods are accepted for MP18831-A4BGLU-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP18831-A4BGLU-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP18831-A4BGLU-Z?
MP18831-A4BGLU-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP18831-A4BGLU-Z order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MP18831-A4BGLU-Z?
For technical support, including MP18831-A4BGLU-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP18831-A4BGLU-Z requirements.
6.How does Aetrix verify that MP18831-A4BGLU-Z is sourced from the original manufacturer or authorized distributors?
All MP18831-A4BGLU-Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP18831-A4BGLU-Z meets industry standards.
7.What is the process for return or replacement of MP18831-A4BGLU-Z?
All MP18831-A4BGLU-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP18831-A4BGLU-Z, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MP18831-A4BGLU-Z part is unused and in its original packaging.
Return procedure for MP18831-A4BGLU-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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