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Renesas ISL78444AVEZ-T7A
- Part No.:
- ISL78444AVEZ-T7A
- Manufacturer:
- Renesas
- Category:
- Gate Drivers
- Package:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
ISL78444AVEZ-T7A.pdf
- Description:
- IC GATE DRVR HALF-BRIDG 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:429
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Product details
Overview
ISL78444AVEZ-T7A from Renesas is an AEC-Q100 Grade 1 automotive half-bridge gate driver IC with single tri-level PWM input, 3A sourcing/4A sinking peak gate drive current, adaptive dead time control (ADTC), and 100V bootstrap capability. It drives high-voltage NMOS FETs in 12V–48V bidirectional DC/DC converters and 3-phase motor drivers.
For engineers reviewing the ISL78444AVEZ-T7A datasheet, ISL78444AVEZ-T7A pinout, ISL78444AVEZ-T7A application, or ISL78444AVEZ-T7A equivalent, key selection factors include its integrated bootstrap FET switch (3Ω), programmable dead time via RDT pin, -40°C to +140°C operating range, HTSSOP-14 package with 100V conductor spacing, and compatibility with Renesas multiphase controllers like ISL78226.
Technical Context
The ISL78444AVEZ-T7A implements patented gate-sensed adaptive dead time control using internal voltage thresholds (VADTC_LO = 1.3V, VADTC_HO = 1.0V, VADTC_HS = 0.5V) to detect gate and phase node transitions, preventing shoot-through while minimizing switching losses. Its tri-level PWM interface interprets high/mid/low states to independently control high-side and low-side output timing.
Unlike ISL78424 and ISL78434, the ISL78444AVEZ-T7A consolidates each side's source and sink outputs into single HO and LO pins-reducing external component count while maintaining 3A/4A peak drive strength. The on-chip bootstrap FET switch enables efficient high-side biasing up to 100V HB-to-HS, with UVLO protection on both VDD (7.2V threshold) and HB (7.0V threshold).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 3A sourcing / 4A sinking - sufficient to rapidly charge/discharge gate capacitance of low-rDS(ON) power FETs in high-frequency switching. |
| Bootstrap Voltage Rating | 100V HB-to-HS - supports high-side operation in 70V half-bridge topologies with margin for transient spikes. |
| Adaptive Dead Time Thresholds | VADTC_LO = 1.3V (LO falling), VADTC_HO = 1.0V (HO falling), VADTC_HS = 0.5V (HS falling) - precise gate/phase sensing for dynamic dead time adjustment. |
| Operating Temperature | -40°C to +140°C junction - validated for under-hood automotive environments per AEC-Q100 Grade 1. |
| Supply Range | VDD = 8V to 18V - compatible with 12V vehicle battery systems including cold-crank (8V) and load-dump (18V) conditions. |
| Propagation Delay Matching | tPDHO − tPDLO = −10 to +10 ns - ensures tight timing alignment between high-side and low-side turn-off for balanced dead time. |
| Adjustable Dead Time Range | 50–550 ns (via RDT pin resistor 0–100kΩ) - allows fine-tuning to match specific FET characteristics and layout parasitics. |
Pinout & Package
ISL78444AVEZ-T7A is housed in a 14-lead HTSSOP package (M14.173B) with exposed thermal pad (EPAD), compliant with IPC-2221B 100V conductor spacing requirements. The EPAD must be connected to VSS and AGND via multiple vias for thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 4, 5, 10, 9, 8 | NC / HB / HO / HS / NC / AGND / EPAD | No-connect pins; HB supplies high-side bootstrap; HO drives high-side FET gate; HS references high-side source; AGND and EPAD form analog ground return path. |
| 2, 6, 7, 11, 12, 13, 14 | VSS / EN / RDT / PWM / LO / VDD | VSS is low-side reference; EN enables/disables driver; RDT sets adjustable dead time; PWM is tri-level control input; LO drives low-side FET gate; VDD powers internal circuitry and low-side source. |
Key Features
| Feature | Design Value |
|---|---|
| Tri-level PWM input | Supports direct interface with Renesas multiphase controllers (e.g., ISL78226) without external logic; mid-level state enables independent high/low-side timing control. |
| Integrated 3Ω bootstrap FET switch | Eliminates need for external bootstrap diode and reduces board space/cost while improving reliability over discrete solutions. |
| Programmable dead time via RDT pin | Single resistor (0–100kΩ) adjusts total dead time from 50 ns to 550 ns, enabling optimization for different FET gate charges and layout parasitics. |
| Gate-sensed adaptive dead time control | Dynamically adjusts dead time based on actual HO/LO/HS voltage transitions-prevents shoot-through across temperature, voltage, and process variations. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications requiring operation up to +140°C junction temperature and robust ESD/latch-up performance (2.5kV HBM). |
Applications
| Automotive 3-Phase Motor Driver | 12V–48V Bidirectional DC/DC Converter |
|---|---|
Use Scenario: Driving three half-bridge legs in electric power steering (EPS) or HVAC blower modules using ISL78226 controller. IC Role / Device Role / Timing Role: ISL78444AVEZ-T7A serves as gate driver per phase leg, translating tri-level PWM commands into precisely timed high-side/low-side gate signals with adaptive dead time. Use Value: Enables >100 kHz switching at 48V bus with minimal shoot-through risk and reduced gate drive loss versus fixed-dead-time alternatives. |
Use Scenario: Used in dual-active-bridge (DAB) topology for 12V–48V energy transfer in 48V mild-hybrid vehicles. IC Role / Device Role / Timing Role: ISL78444AVEZ-T7A drives high-side and low-side FETs in each bridge leg, synchronized to ISL78226 controller's multi-phase PWM outputs. Use Value: 100V bootstrap rating and -40°C to +140°C operation ensure reliable startup and sustained performance during engine cranking and under-hood thermal stress. |
| Multi-Phase Boost Converter | Automotive LED Matrix Driver |
Use Scenario: Implementing 4-phase interleaved boost for ADAS camera power supply using ISL78220 controller. IC Role / Device Role / Timing Role: ISL78444AVEZ-T7A provides gate drive per phase with matched propagation delays (<±10 ns) to minimize current ripple and EMI. Use Value: Tight delay matching and programmable dead time reduce phase imbalance and improve efficiency at 500 kHz switching frequency. |
Use Scenario: Driving high-current LED strings in adaptive front-lighting systems (AFS) with fast dimming response. IC Role / Device Role / Timing Role: ISL78444AVEZ-T7A operates in high-side switch configuration with PWM-controlled brightness and adaptive dead time for short-circuit protection. Use Value: Integrated UVLO on VDD and HB prevents erratic switching during brown-out conditions, ensuring fail-safe LED behavior per ISO 26262 ASIL-B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar half-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL78424AVEZ-T7A | Separate HO_H/HO_L and LO_H/LO_L pins; identical ADTC, tri-level PWM, and specs except pinout. | Requires separate gate resistors per source/sink path; better suited for designs needing independent gate current control. | Select ISL78424AVEZ-T7A when optimizing gate drive slew rate or minimizing Miller-induced oscillation via asymmetric Rg_on/Rg_off. |
| UCC27211D | Non-automotive, no AEC-Q100 qualification; 4A/4A drive; no adaptive dead time; fixed 500ns dead time. | Limited to industrial/commercial use; lacks gate-sense-based shoot-through protection and automotive temp range. | Choose UCC27211D only for cost-sensitive non-automotive applications where fixed dead time suffices and -40°C to +125°C is adequate. |
Compared with ISL78424AVEZ-T7A, the ISL78444AVEZ-T7A reduces PCB footprint and BOM count via consolidated HO/LO pins, while retaining full ADTC functionality; versus UCC27211D, it delivers automotive-grade reliability, dynamic dead time, and extended temperature operation essential for safety-critical vehicle systems.
Availability
ISL78444AVEZ-T7A is available at Aetrix Electronics and suitable for automotive 3-phase motor drivers, 12V–48V bidirectional DC/DC converters, and multi-phase boost applications requiring stable component supply across extended temperature and high-reliability automotive programs.
Supply support for ISL78444AVEZ-T7A 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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and SoC products for automotive, industrial, and IoT markets, with deep expertise in high-reliability power management ICs.
The ISL78444AVEZ-T7A belongs to Renesas' ISL784xx automotive gate driver family, designed specifically for high-efficiency, high-frequency power conversion in demanding automotive electrification systems including EPS, ADAS, and 48V mild hybrids.
FAQ
What is the maximum bootstrap voltage rating for ISL78444AVEZ-T7A?
The ISL78444AVEZ-T7A supports a maximum bootstrap supply voltage (HB-to-HS) of 100V, enabling reliable high-side operation in 70V half-bridge topologies with margin for voltage transients. This rating is specified in the Absolute Maximum Ratings table and validated across the full -40°C to +140°C operating range.
Does ISL78444AVEZ-T7A require external bootstrap diodes?
No, the ISL78444AVEZ-T7A integrates a 3Ω bootstrap FET switch, eliminating the need for external bootstrap diodes. This reduces component count, improves reliability, and simplifies layout-particularly beneficial in space-constrained automotive modules where thermal and EMI performance are critical.
How does the tri-level PWM input function in ISL78444AVEZ-T7A?
The tri-level PWM input on ISL78444AVEZ-T7A accepts three distinct voltage states: high (>3.5V), mid (1.5–3.3V), and low (<1.2V). The mid-level state triggers independent timing control for high-side and low-side outputs, enabling precise dead time management without external logic-optimized for use with Renesas multiphase controllers like ISL78226.
What is the purpose of the RDT pin on ISL78444AVEZ-T7A?
The RDT pin on ISL78444AVEZ-T7A allows programmable extension of the adaptive dead time via an external resistor to AGND. With resistor values from 0Ω to 100kΩ, total dead time can be adjusted from 50 ns to 550 ns-enabling design-specific tuning to match FET gate charge, layout parasitics, and system-level timing requirements.
Is ISL78444AVEZ-T7A pin-compatible with any other Renesas drivers?
Yes, the ISL78444AVEZ-T7A is pin-compatible with the ISL78420, allowing drop-in replacement in existing designs. However, it is not pin-compatible with ISL78424 or ISL78434 due to differences in output pin configuration (consolidated HO/LO vs. separate source/sink pins) and input structure (tri-level PWM only vs. HI/LI or dual PWM variants).
ISL78444AVEZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Synchronous
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 8V ~ 18V
- Logic Voltage - VIL, VIH:
- 1V, 2.1V
- Current - Peak Output (Source, Sink):
- 3A, 4A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 100 V
- Rise / Fall Time (Typ):
- 10ns, 10ns
- Operating Temperature:
- -40°C ~ 140°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
ISL78444AVEZ-T7A FAQ
1.How can I place an order for ISL78444AVEZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78444AVEZ-T7A 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 ISL78444AVEZ-T7A reliable?
The price and inventory of ISL78444AVEZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78444AVEZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL78444AVEZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78444AVEZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78444AVEZ-T7A?
ISL78444AVEZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78444AVEZ-T7A 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 ISL78444AVEZ-T7A?
For technical support, including ISL78444AVEZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78444AVEZ-T7A requirements.
6.How does Aetrix verify that ISL78444AVEZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL78444AVEZ-T7A 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 ISL78444AVEZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL78444AVEZ-T7A?
All ISL78444AVEZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL78444AVEZ-T7A, 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 ISL78444AVEZ-T7A part is unused and in its original packaging.
Return procedure for ISL78444AVEZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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