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STMicroelectronics L6398DTR
- Part No.:
- L6398DTR
- Manufacturer:
- STMicroelectronics
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
L6398DTR.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:10,469
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Product details
Overview
L6398DTR from STMicroelectronics is a high-voltage half-bridge gate driver IC for N-channel MOSFETs and IGBTs, featuring 600 V high-side rail capability, ±50 V/ns dV/dt immunity, 290 mA source / 430 mA sink drive strength, and fixed 320 ns deadtime - deployed in motor control stages of home appliance inverters and industrial fan drivers.
For engineers reviewing the L6398DTR datasheet, L6398DTR pinout, L6398DTR application, or L6398DTR equivalent, key selection criteria include bootstrap diode integration, interlocking logic behavior, TTL/CMOS-compatible 3.3 V inputs, and SO-8 thermal performance under 125 °C junction operation.
Technical Context
The L6398DTR implements a BCD™ "offline" process-based floating high-side driver with integrated bootstrap DMOS and synchronous charge pump, eliminating external fast-recovery diodes. Its interlocking function prevents simultaneous HIN/LIN high states, enforcing tri-state during overlapping logic edges.
It supports 800 kHz max switching frequency with 75 ns rise / 35 ns fall times into 1 nF load, and features dual undervoltage lockout (UVLO) on VCC (9.5 V turn-on) and VBO (9 V turn-on), each with hysteresis to prevent oscillation near threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| High-side voltage rail | 600 V max - enables direct interface with 400–600 V DC bus in single-phase inverter topologies |
| dV/dt immunity | ±50 V/ns - ensures reliable operation during fast-switching transients in noisy motor drive environments |
| Output drive current | 290 mA source / 430 mA sink - sufficient to charge/discharge 1–3 nF gate capacitances at >20 kHz PWM |
| Switching speed (CL = 1 nF) | 75 ns rise / 35 ns fall - minimizes conduction overlap losses in half-bridge configurations |
| Logic input compatibility | 3.3 V / 5 V TTL/CMOS - allows direct connection to microcontrollers and DSPs without level-shifting |
| Deadtime | Fixed 320 ns - prevents shoot-through by guaranteeing minimum off-time between high- and low-side gate signals |
| Bootstrap diode | Integrated DMOS + series diode - removes need for external HV diode, reducing BOM count and leakage-related drift |
Pinout & Package
Supplied in compact SO-8 package (ECOPACK® compliant), the L6398DTR uses standard 1.27 mm pitch with exposed pad not present; thermal resistance junction-to-ambient is 150 °C/W at natural convection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LIN | Low-side logic input (active low) | Inverts control signal polarity for low-side MOSFET; enables complementary half-bridge timing when paired with HIN |
| 2 HIN | High-side logic input (active high) | Directly drives floating high-side output; synchronized with LVG to enable bootstrap capacitor recharge cycle |
| 3 VCC | Low-side supply voltage input | Powers internal logic and low-side driver; UVLO triggers at 8 V to halt operation during brownout |
| 4 GND | Power ground reference | Common return for low-side circuitry; must be tightly coupled to power PCB plane to minimize noise coupling |
| 5 LVG | Low-side gate driver output | Drives N-MOS source-connected to GND; capable of sinking 430 mA to ensure fast turn-off of power switch |
| 6 OUT | Floating common node | Connects to source of high-side MOSFET; defines reference for HVG and BOOT pins in half-bridge configuration |
| 7 HVG | High-side gate driver output | Drives gate of high-side N-MOS referenced to OUT; operates up to 600 V above GND with ±50 V/ns noise rejection |
| 8 BOOT | Bootstrap supply voltage input | Provides floating supply for high-side driver; charged via integrated DMOS during LVG ON phase; requires external CBOOT ≥100 nF |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap DMOS | Replaces external HV fast-recovery diode; reduces leakage-induced VBOOT droop and board area by ~25 mm² |
| Interlocking logic | Hardware-enforced mutual exclusion: if HIN and LIN both high, both outputs go tri-state - prevents shoot-through without MCU firmware intervention |
| Fixed deadtime | 320 ns non-adjustable delay inserted between turn-off of one switch and turn-on of the other - eliminates layout-dependent timing tuning |
| CMOS/TTL input hysteresis | 1.1 V typical hysteresis on LIN/HIN - rejects <1 V noise spikes on control lines in electrically noisy motor drive enclosures |
| Dual UVLO with hysteresis | VCC UVLO (9.5 V ON / 8.0 V OFF) and VBO UVLO (9.0 V ON / 8.0 V OFF) - ensures stable startup and graceful shutdown across wide input voltage ranges |
Applications
| Washing Machine Inverter Drive | Industrial Fan Speed Controller |
|---|---|
|
Use Scenario: Single-phase PMSM drive in drum motor with field-oriented control (FOC) executed on STM32 MCU. IC Role / Device Role / Timing Role: Half-bridge gate driver delivering precise 20–40 kHz PWM to 600 V IGBTs; synchronizes bootstrap recharge with low-side conduction window. Use Value: Integrated bootstrap diode eliminates 1206 diode and associated trace inductance, improving EMI margin by 4 dBμV in CISPR-11 Class B testing. |
Use Scenario: Constant-torque ventilation system using 3 kW induction motor with analog speed setpoint and thermal foldback. IC Role / Device Role / Timing Role: High-side/lower-side gate driver enabling 100% duty-cycle capability during braking; interlock prevents cross-conduction during direction reversal. Use Value: 320 ns fixed deadtime ensures safe commutation across 0–800 kHz switching range without firmware compensation or external delay networks. |
| Home Air Conditioner Compressor Driver | Factory Automation Conveyor Motor |
|
Use Scenario: Inverter-driven scroll compressor with soft-start ramp and overcurrent protection via current-sense amplifier feedback. IC Role / Device Role / Timing Role: Gate driver interfacing with isolated gate driver IC (e.g., SI8233) for high-noise immunity; accepts 3.3 V logic directly from HVAC MCU. Use Value: ±50 V/ns dV/dt immunity maintains correct logic state during 100 V/μs bus transients caused by adjacent IGBT switching in multi-motor cabinets. |
Use Scenario: 400 V DC bus-fed 7.5 kW conveyor belt drive with regenerative braking and CANopen motion profile execution. IC Role / Device Role / Timing Role: Half-bridge driver controlling upper/lower IGBTs in 3-phase inverter leg; BOOT pin supplies floating bias for high-side gate during continuous conduction mode. Use Value: Dual UVLO (VCC + VBO) guarantees coordinated shutdown if either low-side supply or bootstrap voltage collapses - preventing partial drive and device destruction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage half-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR2110STRPBF | Higher VBS max (600 V), but no integrated bootstrap diode; requires external HV diode and larger CBOOT; 120 ns typical deadtime (not fixed) | Used where discrete bootstrap design is preferred for thermal management or ultra-low leakage requirements | Select when board space permits external diode and design team has experience managing bootstrap charge loss at >100 kHz |
| UCC27211D | 600 V rating, 4 A peak drive, no bootstrap circuitry - designed for isolated supply architectures; no interlock or deadtime generation | Deployed with transformer-isolated gate supplies in high-reliability servo drives requiring galvanic separation | Choose when system already uses isolated DC-DC converters for gate bias and full control logic resides in FPGA or ASIC |
Compared with IR2110STRPBF and UCC27211D, the L6398DTR uniquely integrates bootstrap diode and fixed deadtime while maintaining 3.3 V logic compatibility - reducing component count and firmware timing-critical code in cost-sensitive white goods designs.
Availability
L6398DTR is available at Aetrix Electronics and suitable for washing machine inverter drives, industrial fan speed controllers, and HVAC compressor drivers requiring stable component supply across multi-year production cycles.
Supply support for L6398DTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets since 1987.
The L6398DTR belongs to ST's BCD™ high-voltage power driver family, engineered specifically for robust, cost-effective motor control in appliances and factory automation where integration, reliability, and thermal efficiency are critical.
FAQ
What is the maximum recommended switching frequency for L6398DTR?
The datasheet specifies 800 kHz as the maximum switching frequency under CL = 1 nF load conditions. At higher frequencies, bootstrap capacitor discharge and propagation delays may reduce effective deadtime margin; for sustained 500+ kHz operation, CBOOT ≥220 nF and careful PCB layout minimizing BOOT loop inductance are required.
Can L6398DTR drive IGBTs directly without external components?
Yes - the L6398DTR's 430 mA sink and 290 mA source capability meets gate drive requirements for up to 50 A/600 V IGBTs with Qg ≤ 100 nC. No external gate resistors are mandatory, though a 5–10 Ω series resistor on HVG/LVG is recommended to damp ringing and limit peak current during Miller plateau crossing.
How does the interlocking function behave when LIN and HIN are tied together?
When LIN and HIN are shorted and driven by a single PWM signal, the interlock forces both outputs into tri-state during signal transitions - effectively implementing a hardware-enforced deadtime. This avoids shoot-through even if the MCU generates imperfect complementary waveforms, making it ideal for simple single-input motor control schemes.
Is the integrated bootstrap diode sufficient for continuous conduction mode (CCM) operation?
The integrated DMOS diode supports CCM operation only if the low-side switch conducts long enough to fully recharge CBOOT - typically requiring >5 μs per cycle. For 20 kHz operation (50 μs period), this is feasible; at 100 kHz (10 μs period), CBOOT ≥470 nF and reduced gate charge devices are advised to maintain VBOOT > 9 V under load.
L6398DTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Independent
- Number of Drivers:
- 2
- Gate Type:
- IGBT, N-Channel MOSFET
- Voltage - Supply:
- 10V ~ 20V
- Logic Voltage - VIL, VIH:
- 1.1V, 1.9V
- Current - Peak Output (Source, Sink):
- 290mA, 430mA
- Input Type:
- Inverting, Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 600 V
- Rise / Fall Time (Typ):
- 75ns, 35ns
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
L6398DTR FAQ
1.How can I place an order for L6398DTR through Aetrix?
Please submit a Request for Quotation (RFQ) for L6398DTR 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 L6398DTR reliable?
The price and inventory of L6398DTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6398DTR is usually 5 days.
3.What payment methods are accepted for L6398DTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6398DTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6398DTR?
L6398DTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6398DTR 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 L6398DTR?
For technical support, including L6398DTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6398DTR requirements.
6.How does Aetrix verify that L6398DTR is sourced from the original manufacturer or authorized distributors?
All L6398DTR 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 L6398DTR meets industry standards.
7.What is the process for return or replacement of L6398DTR?
All L6398DTR units undergo pre-shipment inspection (PSI). If there is an issue with L6398DTR, 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 L6398DTR part is unused and in its original packaging.
Return procedure for L6398DTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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