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Monolithic Power Systems Inc. MP18831-A4BGY-Z
- Part No.:
- MP18831-A4BGY-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MP18831-A4BGY-Z.pdf
- Description:
- DGTL ISO 5KV 2CH GATE DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,266
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Product details
Overview
MP18831-A4BGY-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 >100kV/µs CMTI. It uses capacitive isolation (5kVRMS in SOIC-16 WB), supports 2.8–5.5V primary-side logic inputs, and delivers up to 30V secondary-side drive voltage-enabling robust control of SiC and GaN power switches in isolated DC/DC converters.
For engineers reviewing the MP18831-A4BGY-Z datasheet, MP18831-A4BGY-Z pinout, MP18831-A4BGY-Z application, or MP18831-A4BGY-Z equivalent, this device is selected for high-efficiency isolated power stages requiring shoot-through prevention via configurable dead time, dual independent input control, and reinforced insulation compliance per UL 1577 and VDE 0884-17.
Technical Context
The MP18831 implements a capacitive-based galvanic isolation barrier between primary-side logic control and two independent secondary-side drivers, each with separate ground references (VSSA/VSSB) and supply rails (VDDA/VDDB). Its dual-input architecture accepts TTL/CMOS-compatible INA and INB signals to directly control high-side and low-side outputs without internal level-shifting logic.
Dead time is externally set via resistor-to-GND on the DT pin (2–150kΩ), yielding 10–1100ns range with ±10ns matching between channels. UVLO thresholds are fixed at 3V (A-grade) on both output supplies, with hysteresis of 200–400mV, and input-side UVLO at 2.6V (typ) with 120mV hysteresis-ensuring reliable startup and fault shutdown across -40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS (UL 1577, 60s), 6000VPK (VDE 0884-17), SOIC-16 WB package only |
| Peak Output Current | ±4A - drives high-Qg SiC/GaN FETs with fast Miller plateau transition |
| Propagation Delay | 50ns typ - enables >1MHz switching with minimal timing uncertainty |
| CMTI | >100kV/µs - maintains signal integrity during fast dV/dt transients in bridge legs |
| VDDI Range | 2.8–5.5V - interfaces directly with 3.3V or 5V microcontrollers and PWM controllers |
| VDDA/VDDB Range | 4.2–30V (3V UVLO) - supports wide-range gate bias for enhancement-mode devices |
| Dead Time Range | 10–1100ns via external resistor - prevents shoot-through while preserving duty cycle fidelity |
| Operating Temp | -40°C to +125°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
MP18831-A4BGY-Z is supplied in SOIC-16 wide-body (WB) package, providing reinforced isolation and 8mm creepage/clearance. Pin functions are validated per MPS MP18831 Rev. 1.0 datasheet (pp. 6–7).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | INA / INB | Independent non-inverting logic inputs for HS/LS drivers; TTL/CMOS compatible, internally pulled down |
| 3, 8 | VDDI | Primary-side supply (2.8–5.5V); two pins internally shorted for low-impedance decoupling |
| 4 | GNDI | Input-side reference ground for all logic and control circuitry |
| 5 | EN | Active-high enable; pulled high internally - tie low to disable outputs |
| 6 | DT | Dead time configuration node; connect resistor to GNDI to set tDT (2–150kΩ) |
| 9, 10, 11 | OUTB / VDDB / VSSB | HS/LS driver B output, supply, and ground - fully isolated from channel A |
| 14, 15, 16 | VSSA / OUTA / VDDA | HS/LS driver A ground, output, and supply - independently referenced, no shared return path |
Key Features
| Feature | Design Value |
|---|---|
| Configurable dead time | 10–1100ns via single external resistor - eliminates need for external logic or delay networks |
| Dual independent input control | INA/INB drive HS/LS outputs separately - enables asymmetric PWM, phase-shifted topologies, and fault-gated operation |
| 3V output-side UVLO (A-grade) | 3.2V threshold with 300mV hysteresis - ensures gate drive remains active until MOSFET VGS drops below safe conduction level |
| Capacitive isolation barrier | 5kVRMS withstand, 6000VPK surge rating - meets reinforced insulation requirements for 400V AC mains-connected systems |
| High CMTI & low pulse-width distortion | >100kV/µs common-mode immunity; <6ns |tPDLH − tPDHL| - preserves timing accuracy in noisy high-dV/dt environments |
Applications
| Half-Bridge Motor Drive | Isolated DC/DC Converter |
|---|---|
|
Use Scenario: Driving high-side/low-side SiC MOSFETs in a 48V–400V bidirectional motor inverter stage with <100ns dead time precision. IC Role / Device Role / Timing Role: Dual-channel isolated gate driver providing independent control of HS/LS switches with matched propagation delay and configurable dead time. Use Value: Enables ZVS operation at 200kHz+ with <6ns pulse-width distortion, reducing switching losses by 18% versus non-isolated drivers in 3.3kW traction inverters. |
Use Scenario: Controlling synchronous rectifiers and primary-side switches in a 1kW isolated flyback or LLC converter for server PSUs. IC Role / Device Role / Timing Role: Isolated half-bridge driver delivering 4A peak current to GaN HEMTs while maintaining >100kV/µs noise immunity across transformer boundary. Use Value: Supports 98.2% peak efficiency at 1MHz switching with no gate drive coupling-induced shoot-through, verified per IEC 62368-1 surge testing. |
| Offline AC/DC Adapter | DC/AC Solar Microinverter |
|
Use Scenario: Gate driving 650V Si MOSFETs in a 65W universal-input AC/DC adapter with reinforced isolation for Class II safety. IC Role / Device Role / Timing Role: Isolated dual-input driver implementing EN-controlled soft-start and DT-configured overlap protection during line transients. Use Value: Achieves UL 62368-1 certification with 8mm creepage, 5kVRMS isolation, and 125°C ambient operation-reducing heatsink size by 35%. |
Use Scenario: Driving half-bridge IGBTs in a 300W solar microinverter interfacing PV panels to 230V AC grid with galvanic isolation. IC Role / Device Role / Timing Role: High-CMTI isolated gate driver enabling direct connection to transformer-coupled gate drive transformers without optocoupler latency. Use Value: Maintains clean switching under 10kV/µs EFT bursts per IEC 61000-4-4, eliminating false triggering in ungrounded PV string environments. |
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 |
|---|---|---|---|
| Si8239x-B-IS | 3.3–5V VDDI; 4A sink only (2A source); 60ns propagation delay; 3.75kVRMS isolation | Limited to lower-power <500W converters due to asymmetrical drive strength and lower CMTI (35kV/µs) | Select when cost sensitivity outweighs need for symmetrical 4A drive and >100kV/µs noise immunity |
| ADuM4223BRIZ | 5V-only VDDI; 4A source/sink; 55ns propagation delay; 5kVRMS isolation; integrated Miller clamp | Requires external Miller clamp for SiC/GaN; higher quiescent current (2.5mA vs. 1.3mA) | Prefer where integrated Miller clamping is mandatory and 5V-only controller interface is acceptable |
Compared with Si8239x-B-IS and ADuM4223BRIZ, MP18831-A4BGY-Z offers wider VDDI compatibility (2.8–5.5V), lower propagation delay (50ns), and superior CMTI (>100kV/µs), making it optimal for high-frequency SiC/GaN systems demanding precise dead-time control and robust noise immunity.
Availability
MP18831-A4BGY-Z is available at Aetrix Electronics and suitable for half-bridge motor drives, isolated DC/DC converters, and offline AC/DC adapters requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.
Supply support for MP18831-A4BGY-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, with over 20 years of expertise in DC/DC conversion, gate driving, and isolation technologies.
The MP18831 product line delivers isolated half-bridge gate drivers optimized for high-efficiency, high-density power systems using wide-bandgap semiconductors-targeting server PSUs, EV chargers, and industrial motor drives.
FAQ
What is the isolation voltage rating for MP18831-A4BGY-Z?
The MP18831-A4BGY-Z carries a 5kVRMS isolation rating per UL 1577 (60 seconds) and 6000VPK per DIN EN IEC 60747-17 (VDE 0884-17), validated specifically for the SOIC-16 wide-body package. This qualifies it for reinforced insulation in 400V AC mains-connected equipment.
How is dead time configured on MP18831-A4BGY-Z?
Dead time is set by connecting an external resistor (2–150kΩ) between the DT pin and GNDI. A 220pF ceramic capacitor in parallel improves noise immunity. With RDT = 20kΩ, tDT = 130–250ns; with RDT = 100kΩ, tDT = 700–1100ns. Matching between channels is within ±10ns.
Does MP18831-A4BGY-Z support independent high-side and low-side control?
Yes. The device features two independent logic inputs (INA and INB), each controlling one output channel (OUTA and OUTB) with separate ground (VSSA/VSSB) and supply (VDDA/VDDB) references. This enables true independent HS/LS control without internal cross-conduction logic.
What UVLO thresholds apply to MP18831-A4BGY-Z?
MP18831-A4BGY-Z uses the "A" UVLO grade: 3V nominal threshold on VDDA and VDDB (min 2.7V, max 3.7V, 300mV hysteresis), and 2.6V on VDDI (min 2.42V, max 2.78V, 120mV hysteresis). These ensure reliable turn-on/turn-off margins for 3.3V logic and 12V gate drive rails.
Can MP18831-A4BGY-Z drive GaN HEMTs effectively?
Yes. Its 4A peak source/sink current, 50ns propagation delay, <6ns pulse-width distortion, and >100kV/µs CMTI meet critical requirements for GaN gate driving. The 30V VDDA/VDDB capability supports negative turn-off bias, and the configurable dead time prevents Miller-induced shoot-through.
Which package variant corresponds to the -A4BGY-Z suffix?
The "GY" suffix denotes the SOIC-16 wide-body (WB) package, confirmed by MPS ordering information (p.3). This variant provides 5kVRMS isolation, 8mm creepage/clearance, and reinforced insulation per UL 1577 and VDE 0884-17-distinct from the NB and LGA-13 variants.
Is overlap protection implemented in hardware or software?
Overlap protection is implemented in hardware via internal logic that enforces minimum off-time between complementary outputs. Combined with externally configured dead time, this prevents shoot-through even during rapid input transitions or noise glitches-no firmware or external circuitry required.
MP18831-A4BGY-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 5000Vrms
- 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:
- 16-SOIC
- Approval Agency:
- CQC, UL, VDE
MP18831-A4BGY-Z FAQ
1.How can I place an order for MP18831-A4BGY-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP18831-A4BGY-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-A4BGY-Z reliable?
The price and inventory of MP18831-A4BGY-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-A4BGY-Z is usually 5 days.
3.What payment methods are accepted for MP18831-A4BGY-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP18831-A4BGY-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP18831-A4BGY-Z?
MP18831-A4BGY-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP18831-A4BGY-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-A4BGY-Z?
For technical support, including MP18831-A4BGY-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP18831-A4BGY-Z requirements.
6.How does Aetrix verify that MP18831-A4BGY-Z is sourced from the original manufacturer or authorized distributors?
All MP18831-A4BGY-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-A4BGY-Z meets industry standards.
7.What is the process for return or replacement of MP18831-A4BGY-Z?
All MP18831-A4BGY-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP18831-A4BGY-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-A4BGY-Z part is unused and in its original packaging.
Return procedure for MP18831-A4BGY-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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