ADUM4221BRWZ-RL7 - Isolated Half-Bridge Gate Driver | Analog Devices
MPN: ADUM4221BRWZ-RL7 ✓ نشطADUM4221BRWZ-RL7 نظرة عامة
An isolated gate driver is a specialized integrated circuit that provides the necessary voltage and current to drive the gate of power transistors (MOSFETs or IGBTs) while maintaining galvanic isolation between the control side and the power side. This isolation is critical in applications where the power stage operates at high voltages or in noisy environments, as it protects the low-voltage control circuitry and prevents ground loops. The ADUM4221 belongs to the family of isolated gate drivers, which are essential components in switch-mode power supplies, motor drives, and inverters.
Key features of the ADUM4221BRWZ-RL7 include a maximum propagation delay of 44 ns, high common-mode transient immunity of 150 kV/µs, and adjustable dead time to prevent shoot-through in half-bridge configurations. The device supports both dual-input and single-input modes (ADUM4221-1 variant) and offers a default low output state for safety. The output rise and fall times are 25 ns, enabling high-frequency switching operation.
The ADUM4221 utilizes a proprietary iCoupler transformer-based isolation architecture, which provides superior performance compared to optocouplers or pulse transformers. The isolation barrier is rated for 3000 Vrms, and the device can operate at junction temperatures up to 125°C, making it suitable for demanding industrial environments. The high common-mode transient immunity ensures reliable operation in the presence of fast voltage transients, which is critical in motor drive and inverter applications.
Typical applications include isolated switch-mode power supplies, motor drives, solar inverters, and industrial automation. The adjustable dead time feature allows designers to optimize switching efficiency and prevent cross-conduction. The device is available in a 16-lead SOIC package (BRWZ), which is compact and suitable for space-constrained designs.
When designing with the ADUM4221, it is important to ensure proper PCB layout to minimize parasitic inductance and maintain signal integrity. The input and output supplies should be decoupled with low-ESR capacitors placed close to the pins. Additionally, the dead time should be set appropriately based on the switching characteristics of the power transistors to avoid shoot-through.
بدائل مباشرة لـ ADUM4221BRWZ-RL7 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ADUM4221BRWZ-RL7 (نفس عامل الشكل والبصمة) — يختلف في Package, Technology, Isolation Voltage, Operating Temperature Range, Adjustable Dead Time.
ADUM4221BRWZ
✅ بديل مباشر✗ غير متوفر
$3.1 / وحدة
عرض ورقة البيانات ←ADUM4221-1BRWZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
ADUM4221-2BRWZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
UCC21520DW
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
SI8271GB-IS
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
ADUM4221BRWZ-RL7 الحدود القصوى والخصائص الكهربائية
| Technology | iCoupler (magnetic isolation) |
| Number of Channels | 2 |
| Peak Output Current | 4 A |
| Isolation Voltage | 3000 Vrms |
| Propagation Delay (max) | 44 ns |
| Common-Mode Transient Immunity | 150 kV/µs |
| Output Rise Time | 25 ns |
| Output Fall Time | 25 ns |
| Supply Voltage Range | 2.5 V to 35 V |
| Adjustable Dead Time | Yes |
| Input Logic Levels | CMOS |
| نطاق درجة حرارة التشغيل | -40°C to +125°C |
| العلبة | 16-lead SOIC (BRWZ) |
| نوع التركيب | Surface Mount |
| Default Output State | Low |
تكوين أطراف ADUM4221BRWZ-RL7
| دبوس 1 | VDD1 — Input side supply voltage |
| دبوس 2 | GND1 — Input side ground |
| دبوس 3 | VIA — Input signal for high-side driver |
| دبوس 4 | VIB — Input signal for low-side driver |
| دبوس 5 | DT — Dead time adjustment |
| دبوس 6 | GND1 — Input side ground |
| دبوس 7 | NC — No connect |
| دبوس 8 | NC — No connect |
| دبوس 9 | VDD2 — High-side output supply voltage |
| دبوس 10 | VOA — High-side gate drive output |
| دبوس 11 | GND2 — High-side ground |
| دبوس 12 | GND2 — High-side ground |
| دبوس 13 | VOB — Low-side gate drive output |
| دبوس 14 | VDD2 — Low-side output supply voltage |
| دبوس 15 | NC — No connect |
| دبوس 16 | NC — No connect |
التطبيقات النموذجية
ADUM4221BRWZ-RL7 مناسب لـ 6 التطبيقs: Isolated Switch-Mode Power Supplies, Motor Drives, Solar Inverters, Industrial Automation, Electric Vehicle Chargers, Uninterruptible Power Supplies (UPS).
Isolated Switch-Mode Power Supplies
The ADUM4221BRWZ-RL7 is ideal for isolated switch-mode power supplies (SMPS) where high-side and low-side MOSFETs need to be driven with galvanic isolation. Its 4 A peak output current and 44 ns propagation delay enable efficient high-frequency switching, while the adjustable dead time prevents shoot-through. The 3000 Vrms isolation ensures safety and noise immunity in offline power supplies. Designers can use it in flyback, forward, and half-bridge topologies to achieve high power density and reliability.
موصى به
Motor Drives
In motor drive applications, the ADUM4221BRWZ-RL7 provides robust gate driving for IGBTs and MOSFETs in half-bridge configurations. Its high common-mode transient immunity of 150 kV/µs ensures reliable operation in the presence of motor-induced noise and fast voltage transients. The adjustable dead time allows optimization of switching to minimize losses and prevent cross-conduction. The wide supply voltage range of 2.5 V to 35 V accommodates various gate drive supply levels, making it suitable for industrial motor control.
موصى به
Solar Inverters
The ADUM4221BRWZ-RL7 is well-suited for solar inverter applications, where high-voltage isolation and reliable gate driving are critical. Its 3000 Vrms isolation protects the control circuitry from the high DC bus voltage, while the 4 A peak output current ensures fast switching of power transistors. The adjustable dead time helps optimize efficiency and reduce electromagnetic interference. The device's high operating temperature range of up to 125°C makes it suitable for outdoor installations where ambient temperatures can be high.
موصى به
Industrial Automation
In industrial automation, the ADUM4221BRWZ-RL7 is used in programmable logic controllers (PLCs), robotic systems, and factory automation equipment. Its robust isolation and high common-mode transient immunity ensure reliable operation in electrically noisy environments. The device's adjustable dead time allows precise control of half-bridge outputs, which is essential for driving inductive loads such as solenoids and actuators. The wide supply voltage range and high temperature rating make it suitable for harsh industrial conditions.
موصى به
Electric Vehicle Chargers
The ADUM4221BRWZ-RL7 is suitable for electric vehicle (EV) chargers, where isolation and high current drive are required for power stage MOSFETs. Its 4 A peak output current can drive large gate capacitances, enabling efficient switching at high frequencies. The 3000 Vrms isolation ensures safety between the AC mains and the vehicle's DC bus. The adjustable dead time helps prevent shoot-through in the power stage, improving reliability. The device's wide temperature range supports operation in automotive environments.
موصى به
Uninterruptible Power Supplies (UPS)
In UPS systems, the ADUM4221BRWZ-RL7 is used to drive the inverter stage, providing isolation and high current drive for IGBTs. Its high common-mode transient immunity ensures stable operation during load transients and grid disturbances. The adjustable dead time allows optimization of switching to minimize losses and improve efficiency. The device's wide supply voltage range and high temperature rating make it suitable for continuous operation in demanding environments.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ADUM4221BRWZ-RL7 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ADUM4221BRWZ | ADUM4221-1BRWZ | ADUM4221-2BRWZ | UCC21520DW | SI8271GB-IS |
|---|---|---|---|---|---|---|
| Package | 16-lead SOIC | 16-lead SOIC | 16-lead SOIC | 16-lead SOIC | 16-lead SOIC | 16-lead SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Skyworks Solutions |
| Peak Output Current | 4 A | 4 A | 4 A | 4 A | 4 A | 4 A |
| Isolation Voltage | 3000 Vrms | 3000 Vrms | 3000 Vrms | 3000 Vrms | 3000 Vrms | 2500 Vrms |
| Propagation Delay (max) | 44 ns | 44 ns | 44 ns | 44 ns | 30 ns | 30 ns |
| Common-Mode Transient Immunity | 150 kV/µs | 150 kV/µs | 150 kV/µs | 150 kV/µs | 100 kV/µs | 200 kV/µs |
| Adjustable Dead Time | Yes | Yes | Yes | No | Yes | No |
| Supply Voltage Range | 2.5 V to 35 V | 2.5 V to 35 V | 2.5 V to 35 V | 2.5 V to 35 V | 3 V to 18 V | 2.5 V to 30 V |
أبرز الفروقات
- Adjustable dead time (مقابلSI8271GB-IS)
- Higher isolation voltage (مقابلSI8271GB-IS)
- Wider supply voltage range (مقابلUCC21520DW)
ملاحظات التصميم
Place decoupling capacitors (0.1 µF and 10 µF) close to the VDD1 and VDD2 pins to ensure stable supply voltages. Use low-ESR ceramic capacitors to minimize voltage spikes during switching. The input and output grounds should be separated to maintain isolation integrity.
Keep the gate drive traces short and wide to minimize parasitic inductance and resistance. This reduces ringing and ensures fast switching. Route the high-side and low-side output traces symmetrically to balance the drive strength and minimize timing skew.
The ADUM4221BRWZ-RL7 can dissipate significant power when driving large gate capacitances at high frequencies. Ensure adequate copper area on the PCB for heat dissipation. The SOIC package has a thermal resistance of approximately 100°C/W, so consider the ambient temperature and switching frequency to avoid exceeding the maximum junction temperature of 125°C.
معلومات الامتثال
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; automotive grade variant ADUM3221WBRZ-RL7 is available.
