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Monolithic Power Systems Inc. MP18871-A4BGLU-Z
- Part No.:
- MP18871-A4BGLU-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 13-VFLGA
- Datasheet:
-
MP18871-A4BGLU-Z.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 13LGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,770
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Product details
Overview
MP18871-A4BGLU-Z from Monolithic Power Systems is an isolated, PWM-input half-bridge gate driver IC with 4A peak source/sink current, 50ns typical propagation delay, and configurable dead time via external resistor. It integrates high-side and low-side drivers with independent secondary-side supplies (up to 30V), supports 2.8–5.5V primary-side logic interface, and delivers >100kV/µs CMTI for robust operation in isolated DC/DC converters.
For engineers reviewing the MP18871-A4BGLU-Z datasheet, MP18871-A4BGLU-Z pinout, MP18871-A4BGLU-Z application, or MP18871-A4BGLU-Z equivalent, this device is selected for high-efficiency, high-density power stages requiring reinforced isolation, precise timing control, shoot-through prevention, and compatibility with 3.3V/5V controllers in offline AC/DC and motor drive systems.
Technical Context
The MP18871-A4BGLU-Z implements capacitive-based galvanic isolation between input and dual-output channels, enabling functional separation of primary-side logic and secondary-side gate drive domains. Its single PWM input controls complementary HS/LS outputs with overlap protection and externally adjustable dead time (10–1100ns).
It features dual UVLO thresholds: 2.6V on VDDI (with 120mV hysteresis) and 5V on VDDA/VDDB (with 300mV hysteresis), ensuring reliable startup and fault shutdown across wide supply ranges. The SOIC-16 WB package provides 5kVRMS isolation per UL 1577 and 6000VPK per VDE 0884-17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS (UL 1577, 60s), 6000VPK (VDE 0884-17), SOIC-16 WB package - enables reinforced insulation for 630VRMS working voltage in AC/DC designs |
| Peak Output Current | 4A source / 4A sink - drives high-Qg GaN FETs or Si MOSFETs up to 1MHz switching frequency with minimal Miller plateau distortion |
| Propagation Delay | 50ns typical (35–65ns max) - ensures tight timing alignment between PWM input and gate outputs for <1% pulse-width distortion |
| CMTI | >100kV/µs - maintains signal integrity during fast dV/dt transients across isolated barrier in high-noise SMPS environments |
| VDDI Range | 2.8V to 5.5V - directly interfaces with 3.3V microcontrollers and 5V FPGA I/O without level-shifting circuitry |
| VDDA/VDDB Range | 4.2V to 30V (5V UVLO option) - supports gate drive for 12V logic-level MOSFETs and 20V GaN devices with robust under-voltage lockout |
| Operating Temp | −40°C to +125°C - qualified for industrial and automotive under-hood power stage applications with full parameter guarantee |
Pinout & Package
MP18871-A4BGLU-Z is packaged in LGA-13 (5mm × 5mm) with exposed thermal pad, rated for 2.5kVRMS isolation (UL 1577) and 3535VPK (VDE 0884-17). This compact package supports high-density PCB layouts while maintaining 3.5mm creepage/clearance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM | Primary-side logic input | TTL/CMOS-compatible control signal; internally pulled down; determines phase of OUTA and complement of OUTB |
| EN/DIS | Enable/disable control | Active-high EN or active-high DIS (mutually exclusive); internal pull-up/pull-down allows single-pin enable or disable configuration |
| DT | Dead-time configuration | Resistor-to-GND sets dead time (10–1100ns); 220pF capacitor recommended for noise immunity |
| VDDI | Primary-side supply | 2.8–5.5V input powering isolation barrier and input logic; dual pins internally shorted for low-impedance decoupling |
| GNDI | Primary-side reference ground | Common return for all input-side signals and internal control blocks; galvanically isolated from output grounds |
| VDDA / VSSA | Secondary-side A channel supply/ground | Independent 4.2–30V supply and ground for high-side driver; decoupled locally to minimize ringing |
| OUTA | High-side gate drive output | 4A capable output driving upper switch in half-bridge; rail-to-rail swing referenced to VSSA |
| VDDB / VSSB | Secondary-side B channel supply/ground | Independent 4.2–30V supply and ground for low-side driver; isolated from VDDA/VSSA by ≥700VDC functional barrier |
| OUTB | Low-side gate drive output | 4A capable output driving lower switch; complementary to OUTA with configured dead time; rail-to-rail swing referenced to VSSB |
Key Features
| Feature | Design Value |
|---|---|
| Configurable dead time | Externally set via 2–150kΩ resistor on DT pin, enabling precise shoot-through prevention across varying FET gate charges and layout parasitics |
| Dual UVLO thresholds | Separate 2.6V (VDDI) and 5V (VDDA/VDDB) lockouts with hysteresis ensure coordinated startup/shutdown and prevent partial drive during brownout conditions |
| Capacitive isolation architecture | Proprietary silicon-dioxide barrier delivers 5kVRMS withstand and >100kV/µs CMTI without magnetic coupling limitations or transformer size penalties |
| Thermal derating support | Published safety limiting curves for current and power vs. ambient temperature allow accurate lifetime estimation in sealed enclosures or high-ambient environments |
| Lead-free, RoHS-compliant packaging | LGA-13 meets GB 4943.1-2011 (CQC certified) and IEC 60747-17, supporting safety-critical industrial and medical power system certifications |
Applications
| Motor Drive Half-Bridge | Isolated DC/DC Converter |
|---|---|
|
Use Scenario: Driving high-side/low-side MOSFETs in 48V BLDC motor inverters with integrated current sensing and overcurrent protection. IC Role / Device Role / Timing Role: Isolated gate driver providing independent HS/LS control, dead-time management, and fast propagation to maintain 20kHz PWM fidelity under load transients. Use Value: Enables compact, thermally efficient motor control with 4A peak drive capability and >100kV/µs noise immunity in noisy EMI environments. |
Use Scenario: Secondary-side synchronous rectification in 1kW telecom DC/DC brick with 48V input and 12V output. IC Role / Device Role / Timing Role: Dual-channel isolated driver controlling complementary SR FETs with matched propagation delay (<6ns skew) to minimize conduction loss. Use Value: Delivers 50ns typical delay and 4A drive strength to reduce gate charge loss, improving efficiency by 0.8% at full load versus discrete opto-isolator solutions. |
| Offline AC/DC Adapter | Industrial UPS Inverter |
|
Use Scenario: Primary-side half-bridge driving in 300W flyback-derived LLC resonant converter for universal AC input (90–264VAC). IC Role / Device Role / Timing Role: Isolated PWM interface translating controller output into robust HS/LS gate signals with UVLO coordination across primary and secondary rails. Use Value: 5kVRMS isolation and 6000VPK rating satisfy reinforced insulation requirements for Class I mains-connected equipment per IEC 62368-1. |
Use Scenario: Bidirectional inverter stage in 5kVA industrial uninterruptible power supply with split-phase 230V output. IC Role / Device Role / Timing Role: High-reliability gate driver managing shoot-through risk during mode transitions using programmable dead time and overlap protection. Use Value: Configurable DT (via resistor) and guaranteed <10ns pulse-width distortion prevent cross-conduction faults during rapid load step changes. |
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, 40ns propagation, 5kVRMS isolation (SOIC-16WB), but only 35V max VDD output and no configurable dead time | Requires external dead-time generator; limited to ≤35V gate drive, unsuitable for 40V+ GaN or SiC applications | Select when fixed dead time suffices and output voltage ≤35V; avoid if design requires >35V VDDA/VDDB or fine-tuned DT adjustment |
| ADuM4223BRIZ | 4A peak drive, 55ns propagation, 5kVRMS isolation (SOIC-16WB), but uses magnetic isolation and lacks independent VDDA/VDDB UVLO | No separate secondary-side UVLO thresholds; relies on single VDD2 monitoring, reducing fault detection granularity | Prefer for legacy magnetic-isolation designs where ADI ecosystem integration is required; avoid when independent secondary UVLO is critical for safety compliance |
Compared with Si823H4BB-IS and ADuM4223BRIZ, MP18871-A4BGLU-Z uniquely combines configurable dead time, dual independent secondary UVLOs, and 30V output supply headroom-enabling safer, more flexible, and higher-voltage gate drive in next-generation isolated power topologies.
Availability
MP18871-A4BGLU-Z is available at Aetrix Electronics and suitable for isolated DC/DC converters, offline AC/DC adapters, and motor drive inverters requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial OEM programs.
Supply support for MP18871-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, with over two decades of innovation in DC/DC converters, gate drivers, and motor control solutions.
The MP18871 product line delivers isolated half-bridge gate drivers optimized for high-efficiency, high-density power conversion systems-including server PSUs, telecom rectifiers, and industrial motor drives-where timing precision, noise immunity, and safety certification are critical.
FAQ
What is the isolation voltage rating for MP18871-A4BGLU-Z?
The MP18871-A4BGLU-Z in LGA-13 package is rated for 2.5kVRMS isolation per UL 1577 (60s) and 3535VPK per DIN EN IEC 60747-17 (VDE 0884-17), with 3.5mm creepage and clearance. It achieves basic insulation per GB 4943.1-2011 at 480VP maximum working voltage.
How is dead time configured on MP18871-A4BGLU-Z?
Dead time is set by connecting a resistor (2–150kΩ) between the DT pin and GNDI. Typical values yield 130–1100ns dead time; a 220pF ceramic capacitor in parallel improves noise immunity. Leaving DT open defaults to minimum 10–30ns dead time.
Does MP18871-A4BGLU-Z support both enable and disable logic inputs?
Yes-it provides dual control inputs: EN (active-high, internal pull-up) and DIS (active-high, internal pull-down). Either can be used independently; pulling EN low or DIS high disables both outputs, while leaving both floating or asserted enables normal operation.
What are the UVLO thresholds for VDDA and VDDB on this variant?
MP18871-A4BGLU-Z uses the "-A4B" suffix, indicating 5V UVLO threshold on VDDA and VDDB (min 5.0V, typ 5.5V, max 6.0V) with 300mV hysteresis. This ensures reliable turn-on for 12V gate drive circuits while preventing erratic operation near dropout.
Can MP18871-A4BGLU-Z drive GaN HEMTs effectively?
Yes-its 4A peak source/sink current, 50ns propagation delay, <6ns pulse-width distortion, and >100kV/µs CMTI make it suitable for driving enhancement-mode GaN FETs in high-frequency totem-pole PFC and LLC resonant converters up to 1MHz.
Is thermal performance data available for the LGA-13 package?
Yes-the LGA-13 package has θJA = 106°C/W and θJC = 50°C/W (measured on 2-layer evaluation board). Safety limiting power is 1175mW at 25°C ambient, derating linearly to zero at 125°C ambient per published thermal curves.
What safety certifications does MP18871-A4BGLU-Z hold?
It is UL 1577 recognized (E322138), VDE 0884-17 certified (40055265), and CQC certified per GB 4943.1-2011 (CQC22001348725/722/723), covering reinforced (SOIC-WB) and basic (LGA-13, SOIC-NB) insulation classes with altitude ≤5000m.
MP18871-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):
- 50ns, 50ns
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- -
- Current - Output High, Low:
- 500mA, 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:
- UL
MP18871-A4BGLU-Z FAQ
1.How can I place an order for MP18871-A4BGLU-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP18871-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 MP18871-A4BGLU-Z reliable?
The price and inventory of MP18871-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 MP18871-A4BGLU-Z is usually 5 days.
3.What payment methods are accepted for MP18871-A4BGLU-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP18871-A4BGLU-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP18871-A4BGLU-Z?
MP18871-A4BGLU-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP18871-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 MP18871-A4BGLU-Z?
For technical support, including MP18871-A4BGLU-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP18871-A4BGLU-Z requirements.
6.How does Aetrix verify that MP18871-A4BGLU-Z is sourced from the original manufacturer or authorized distributors?
All MP18871-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 MP18871-A4BGLU-Z meets industry standards.
7.What is the process for return or replacement of MP18871-A4BGLU-Z?
All MP18871-A4BGLU-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP18871-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 MP18871-A4BGLU-Z part is unused and in its original packaging.
Return procedure for MP18871-A4BGLU-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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