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Monolithic Power Systems Inc. MP18831-A4BGSE-Z
- Part No.:
- MP18831-A4BGSE-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP18831-A4BGSE-Z.pdf
- Description:
- DGTL ISO 3KV 2CH GATE DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,136
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Product details
Overview
MP18831-A4BGSE-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 features configurable dead time via external resistor, dual independent input logic (INA/INB), and supports 2.8–5.5V primary-side VDDI and up to 30V secondary-side supplies-enabling robust control of Si MOSFETs or GaN HEMTs in isolated DC/DC converters.
For engineers reviewing the MP18831-A4BGSE-Z datasheet, MP18831-A4BGSE-Z pinout, MP18831-A4BGSE-Z application, or MP18831-A4BGSE-Z equivalent, this device delivers verified 5kVRMS isolation (SOIC-16 WB), UVLO options selectable by part suffix ('B' = 5V threshold), and overlap protection for shoot-through prevention in high-frequency bridge topologies.
Technical Context
The MP18831-A4BGSE-Z implements capacitive-based galvanic isolation between primary (control) and secondary (power) sides, enabling independent ground references for HS and LS drivers. Its dual-channel architecture supports true half-bridge configuration with separate VDDA/VSSA and VDDB/VSSB rails, allowing asymmetric supply voltages and floating output stages.
Dead time is externally set via resistor on DT pin (2–150kΩ), yielding 10–1100ns range with <10ns matching tolerance. Input logic accepts TTL/CMOS levels (1.6V high threshold, 1.2V low threshold), and EN/DIS pins provide complementary enable/disable control with internal pull-up (EN) and pull-down (DIS) resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS (UL 1577, 60s), SOIC-16 WB package - enables reinforced insulation in AC/DC and industrial power supplies. |
| CMTI | >100kV/µs - ensures reliable operation under fast dv/dt transients in high-power inverters and motor drives. |
| Peak Output Current | 4A source / 4A sink - drives large gate capacitances of 650V SiC MOSFETs or 100V GaN devices at high switching frequencies. |
| VDDI Range | 2.8V to 5.5V - interfaces directly with 3.3V or 5V microcontrollers and DSPs without level-shifting. |
| VDDA/VDDB Range | 4.2V to 30V (with 5V UVLO) - supports wide-range bootstrap or isolated bias supplies for high-side gate drive. |
| Propagation Delay | 50ns typical (35–65ns max) - enables precise timing control in 100kHz–2MHz resonant LLC and phase-shifted full-bridge designs. |
| Dead Time Range | 10ns to 1100ns - prevents shoot-through in hard-switched half-bridges while maintaining high efficiency at light loads. |
Pinout & Package
MP18831-A4BGSE-Z is packaged in SOIC-16 WB (wide-body), providing 5kVRMS isolation and 8mm minimum creepage/clearance. The package supports surface-mount assembly and thermal dissipation up to 2215mW at 25°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | INA, INB | Non-inverting logic inputs for channel A and B; TTL/CMOS-compatible, internally pulled down - direct connection to MCU GPIOs. |
| 3, 8 | VDDI | Primary-side supply (2.8–5.5V); two pins internally shorted - requires local 0.1µF ceramic decoupling at each pin. |
| 4 | GNDI | Input-side reference ground - must be separated from power grounds to maintain isolation integrity. |
| 5 | EN | Enable input (active-high, internal 200kΩ pull-up) - used for global driver activation in fault-safe systems. |
| 5 | DIS | Disable input (active-high, internal 200kΩ pull-down) - complementary to EN; allows flexible system-level shutdown logic. |
| 6 | DT | Dead time configuration node - resistor-to-GND sets delay; parallel 220pF capacitor improves noise immunity. |
| 9, 11 | VSSB, VSSA | Secondary-side ground returns for channel B and A - electrically isolated from GNDI and from each other (±1500V functional). |
| 10, 12 | OUTB, OUTA | Gate drive outputs - deliver ±4A peak into Miller plateau region; require low-inductance PCB routing to minimize ringing. |
| 11, 13 | VDDB, VDDA | Secondary-side driver supplies (4.2–30V) - independently powered; each requires local 1µF low-ESR ceramic decoupling to respective VSS. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable dead time | Externally adjustable 10–1100ns range with <10ns channel-to-channel matching - eliminates need for external timing ICs in bridge designs. |
| Dual independent enable logic | EN (pull-up) and DIS (pull-down) pins support both active-high and active-low system control architectures without external inverters. |
| Multiple UVLO thresholds | 'B' suffix denotes 5V output-side UVLO (5.0–6.0V trip), ensuring stable gate drive during brown-out conditions in 12V bias rails. |
| High CMTI & low propagation skew | >100kV/µs common-mode immunity and ≤6ns pulse-width distortion - preserves PWM fidelity across noisy power domains. |
| Thermal robustness | -40°C to +125°C operating junction temperature with 150°C safety limit - validated for industrial and telecom power applications. |
Applications
| Isolated DC/DC Converters | Offline AC/DC Power Supplies |
|---|---|
|
Use Scenario: 1–3kW isolated LLC resonant converter with synchronous rectification. IC Role / Device Role / Timing Role: Dual-channel isolated gate driver controlling high-side and low-side primary FETs with matched propagation delay and programmable dead time. Use Value: Enables ZVS operation at 300–700kHz while preventing shoot-through under load transients and line variations. |
Use Scenario: 1.5kW server PSU using active clamp forward or phase-shifted full-bridge topology. IC Role / Device Role / Timing Role: Isolated half-bridge driver delivering 4A peak current to 650V Si MOSFETs with 5kVRMS barrier for primary-secondary separation. Use Value: Meets reinforced insulation requirements per UL 62368-1 and supports high-density layout with SOIC-16 WB creepage compliance. |
| Motor Drive Inverters | Renewable Energy Inverters |
|
Use Scenario: 7.5kW industrial servo drive with three-phase IGBT module control. IC Role / Device Role / Timing Role: One MP18831-A4BGSE-Z per half-bridge leg driving high-side/low-side IGBT gates with independent UVLO monitoring. Use Value: 100kV/µs CMTI prevents false triggering during fast IGBT switching edges in noisy factory environments. |
Use Scenario: 5kW string solar inverter with transformerless topology and bipolar PV grounding. IC Role / Device Role / Timing Role: Gate driver for high-side and low-side SiC MOSFETs in H5 or HERIC configurations requiring galvanic isolation and high dv/dt immunity. Use Value: 5kVRMS isolation and 1500V functional isolation between channels meet IEC 62109-1 leakage current and clearance requirements. |
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 |
|---|---|---|---|
| Si823H4BD-IS | 4A peak drive, 5kVRMS isolation, but fixed 100ns dead time; no DT pin adjustment. | Lacks configurable dead time - less flexible for optimizing efficiency across variable load conditions. | Select when fixed timing suffices and board space favors smaller SOIC-8 footprint. |
| ADuM4223BRIZ | 4A peak drive, 5kVRMS, but only 35kV/µs CMTI and no independent VDDA/VDDB supplies. | Single secondary supply limits use in asymmetric or split-rail gate drive configurations. | Choose for cost-sensitive designs where lower CMTI and shared rail are acceptable. |
Compared with Si823H4BD-IS and ADuM4223BRIZ, MP18831-A4BGSE-Z uniquely combines field-adjustable dead time, dual independent secondary supplies, and >100kV/µs CMTI - making it optimal for high-efficiency, high-reliability isolated bridge topologies demanding design flexibility and noise resilience.
Availability
MP18831-A4BGSE-Z is available at Aetrix Electronics and suitable for isolated DC/DC converters, offline AC/DC power supplies, and motor drive inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MP18831-A4BGSE-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 two decades of innovation in DC/DC converters, gate drivers, and motor control solutions.
The MP18831 product line delivers isolated gate drivers optimized for high-efficiency, high-density power conversion systems-including server PSUs, telecom rectifiers, and industrial motor drives-where reliability under fast transients and compact layout are critical.
FAQ
What does the 'A4B' suffix indicate in MP18831-A4BGSE-Z?
The 'A4B' suffix specifies the device variant: 'A' denotes active-low disable logic (DIS pin), '4' indicates 4A peak output current, and 'B' sets the output-side UVLO threshold to 5V (5.0–6.0V). This matches the SOIC-16 WB package (GSE) and tape-and-reel delivery (Z).
Can MP18831-A4BGSE-Z drive both Si MOSFETs and SiC/GaN devices?
Yes - its 4A peak source/sink current, 50ns propagation delay, and low output resistance (1–2.5Ω) enable robust turn-on/turn-off of high-capacitance Si MOSFETs and fast-switching SiC/GaN HEMTs. The 30V VDDA/VDDB rating supports gate drive voltages up to 20V for GaN enhancement-mode devices.
How is dead time configured, and what resistor values yield standard delays?
Dead time is set by connecting a resistor between DT pin and GNDI. A 20kΩ resistor yields ~190ns typical delay; 100kΩ yields ~900ns. Values between 2kΩ and 150kΩ are supported, and adding ≥220pF in parallel improves noise rejection during high-dv/dt events.
Does MP18831-A4BGSE-Z require external bootstrap diodes or capacitors?
No - it is not a bootstrap-based driver. It uses galvanically isolated power transfer for secondary-side supplies (VDDA/VDDB), eliminating reliance on bootstrap components. External 1µF ceramic capacitors are required per VDDA/VSSA and VDDB/VSSB pair for local decoupling.
What safety certifications apply to the SOIC-16 WB package?
The SOIC-16 WB package is UL 1577 certified (5kVRMS, 60s), DIN EN IEC 60747-17 (VDE 0884-17):2021-10 certified (6000VPK), and CQC-certified per GB 4943.1-2011 - qualifying it for reinforced insulation in end equipment up to 630VRMS working voltage.
Is there a difference between EN and DIS pin functionality?
Yes - EN is active-high with internal 200kΩ pull-up; DIS is active-high with internal 200kΩ pull-down. They provide complementary enable logic: pulling EN low or DIS high disables outputs. Both can be tied together for single-control operation, or used separately for fault redundancy.
What is the maximum recommended switching frequency for MP18831-A4BGSE-Z?
While not explicitly limited, the 50ns propagation delay, 20ns rise/fall times, and 23ns minimum pulse width support reliable operation up to 2MHz in resonant topologies. Thermal derating curves confirm safe operation at 500kHz with 30V VDDA/VDDB and 25°C ambient.
MP18831-A4BGSE-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 3000Vrms
- 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-A4BGSE-Z FAQ
1.How can I place an order for MP18831-A4BGSE-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP18831-A4BGSE-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-A4BGSE-Z reliable?
The price and inventory of MP18831-A4BGSE-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-A4BGSE-Z is usually 5 days.
3.What payment methods are accepted for MP18831-A4BGSE-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP18831-A4BGSE-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP18831-A4BGSE-Z?
MP18831-A4BGSE-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP18831-A4BGSE-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-A4BGSE-Z?
For technical support, including MP18831-A4BGSE-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP18831-A4BGSE-Z requirements.
6.How does Aetrix verify that MP18831-A4BGSE-Z is sourced from the original manufacturer or authorized distributors?
All MP18831-A4BGSE-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-A4BGSE-Z meets industry standards.
7.What is the process for return or replacement of MP18831-A4BGSE-Z?
All MP18831-A4BGSE-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP18831-A4BGSE-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-A4BGSE-Z part is unused and in its original packaging.
Return procedure for MP18831-A4BGSE-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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