ADUM3221ARZ-RL7 - Isolated 4A Dual-Channel Gate Driver | Analog Devices
部品番号: ADUM3221ARZ-RL7 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.47 | $1,235.00 |
| 1,000 | $2.2 | $2,200.00 |
ADUM3221ARZ-RL7 概要
An isolated gate driver is a specialized integrated circuit that provides the necessary voltage and current to drive the gate of power transistors (such as MOSFETs and IGBTs) while maintaining electrical isolation between the low-voltage control side and the high-voltage power side. This isolation is critical for safety and noise immunity in applications like motor drives, power inverters, and switch-mode power supplies. The ADUM3221ARZ-RL7 integrates two independent isolation channels, each capable of sourcing and sinking 4A, enabling direct driving of high-power switches without additional buffer stages.
Key features of the ADUM3221ARZ-RL7 include a 4.1V nominal undervoltage lockout (UVLO) threshold, which ensures reliable operation during power-up and brown-out conditions. The device supports a wide supply voltage range on the output side, typically from 4.5V to 18V, allowing compatibility with various gate drive voltages. The propagation delay is typically 48ns, and the device offers a minimum pulse width of 100ns, enabling high-frequency switching up to 1MHz. The isolation barrier is rated for 2500Vrms, with a common-mode transient immunity (CMTI) of 25kV/µs, ensuring robust operation in noisy environments.
The ADUM3221ARZ-RL7 is designed for high-performance applications where isolation and drive strength are critical. Its 4A peak output current can directly drive large MOSFETs and IGBTs, reducing the need for external buffer circuits. The dual-channel configuration allows for driving half-bridge or full-bridge topologies with a single device, simplifying PCB layout and reducing component count. The device also features a dead-time control input, enabling precise timing between high-side and low-side switches to prevent shoot-through currents.
Typical applications include isolated switch-mode power supplies, motor drives, solar inverters, and industrial automation systems. The device is also suitable for automotive applications, such as electric vehicle (EV) charging systems and on-board chargers, where isolation and reliability are paramount. The ADUM3221ARZ-RL7 is available in tape and reel packaging (RL7 suffix), with a standard quantity of 1000 units per reel, facilitating automated assembly.
When designing with the ADUM3221ARZ-RL7, it is essential to provide adequate decoupling capacitors on both the input and output supply pins to ensure stable operation. The input side (VDD1) and output side (VDD2) are isolated, and each requires a bypass capacitor of at least 0.1µF placed close to the respective pins. Additionally, the dead-time control pin (DT) should be connected to a resistor to set the desired dead time, or tied to VDD1 for a fixed dead time. Proper PCB layout with a solid ground plane on the output side is recommended to minimize parasitic inductance and ensure clean switching.
ドロップイン代替品: ADUM3221ARZ-RL7 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ADUM3221ARZ-RL7 （同一形状・フットプリント） — 相違点: Technology, Package, Isolation Voltage, RoHS Status, Propagation Delay.
クイック比較ツール — 並列比較する代替部品を選択:
ADUM3221BRZ-RL7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADUM3221ARZ
✅ ドロップイン✓ 在庫あり
$1.52 / 個
データシートを見る →ADUM3221TRZ-EP
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADUM3220ARZ-RL7
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.19 / 個
データシートを見る →Si8261BCC-IP
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADUM3221ARZ-RL7 最大定格＆電気的特性
| Technology | iCoupler (magnetic isolation) |
| Number of Channels | 2 |
| Peak Output Current | 4 A |
| Isolation Voltage | 2500 Vrms |
| UVLO Threshold (Nominal) | 4.1 V |
| Propagation Delay (Typical) | 48 ns |
| Minimum Pulse Width | 100 ns |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Output Supply Voltage Range | 4.5 V to 18 V |
| Input Supply Voltage Range | 3.0 V to 5.5 V |
| パッケージ | 8-SOIC (SOIC-8) |
| 実装タイプ | Surface Mount |
| 動作温度範囲 | -40°C to +125°C |
| RoHS ステータス | Compliant |
| MSLレベル | 1 (unlimited) |
ADUM3221ARZ-RL7 ピン構成
| ピン 1 | VDD1 — Input supply voltage (3.0V to 5.5V) |
| ピン 2 | VOA — Output A (non-inverting) |
| ピン 3 | GND1 — Input ground |
| ピン 4 | VIA — Input A |
| ピン 5 | VIB — Input B |
| ピン 6 | GND2 — Output ground |
| ピン 7 | VOB — Output B (non-inverting) |
| ピン 8 | VDD2 — Output supply voltage (4.5V to 18V) |
主な用途
ADUM3221ARZ-RL7 の用途: 6 件s: Isolated Switch-Mode Power Supplies, Motor Drives, Solar Inverters, Industrial Automation, Electric Vehicle Charging, Medical Equipment.
Isolated Switch-Mode Power Supplies
The ADUM3221ARZ-RL7 is ideal for isolated SMPS topologies such as flyback and forward converters. Its 4A peak output current can drive the primary-side MOSFET directly, while the 2500Vrms isolation provides the necessary galvanic isolation between the control and power stages. The fast 48ns propagation delay enables high-frequency operation, improving power density and efficiency. The UVLO ensures reliable startup and protection against undervoltage conditions.
おすすめ
Motor Drives
In motor drive applications, the ADUM3221ARZ-RL7 provides isolated gate drive for the high-side and low-side MOSFETs or IGBTs in a half-bridge or full-bridge configuration. The dual-channel design simplifies the drive circuit, and the 4A output current ensures fast switching of large power devices. The high CMTI of 25kV/µs prevents false triggering in the presence of motor-induced noise, ensuring reliable operation in industrial environments.
おすすめ
Solar Inverters
The ADUM3221ARZ-RL7 is well-suited for solar inverter applications, where isolation between the DC-DC converter and the grid-tie inverter is required. Its 2500Vrms isolation rating meets the safety requirements for photovoltaic systems. The 4A gate drive capability allows efficient switching of high-power IGBTs, while the wide operating temperature range (-40°C to +125°C) ensures reliable performance in outdoor installations.
おすすめ
Industrial Automation
In industrial automation, the ADUM3221ARZ-RL7 is used in programmable logic controllers (PLCs) and motor control modules to provide isolated gate drive for power stages. The device's robust isolation and high CMTI ensure reliable operation in electrically noisy factory environments. The compact SOIC-8 package allows for high-density PCB layouts, and the tape and reel packaging (RL7) facilitates automated assembly for high-volume production.
おすすめ
Electric Vehicle Charging
The ADUM3221ARZ-RL7 is suitable for electric vehicle (EV) charging systems, including on-board chargers and DC fast chargers. The isolation barrier protects the low-voltage control electronics from the high-voltage battery pack, and the 4A gate drive capability enables efficient switching of high-power SiC or GaN devices. The device's wide temperature range and high reliability make it ideal for automotive-grade applications.
おすすめ
Medical Equipment
In medical equipment, the ADUM3221ARZ-RL7 provides isolated gate drive for power supplies in devices such as MRI machines and patient monitors. The 2500Vrms isolation ensures patient safety by preventing electrical leakage between the power and control sections. The low propagation delay and high CMTI contribute to stable operation, while the RoHS compliance meets medical device environmental standards.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ADUM3221ARZ-RL7 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ADUM3221BRZ-RL7 | ADUM3221ARZ | ADUM3221TRZ-EP | ADUM3220ARZ-RL7 | Si8261BCC-IP |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Silicon Labs |
| Peak Output Current | 4 A | 4 A | 4 A | 4 A | 2 A | 4 A |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| UVLO Threshold (Nominal) | 4.1 V | 7.5 V | 4.1 V | 4.1 V | 4.1 V | 7.5 V |
| Propagation Delay (Typical) | 48 ns | 48 ns | 48 ns | 48 ns | 48 ns | 60 ns |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 35 kV/µs |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -55°C to +150°C | -40°C to +125°C | -40°C to +125°C |
主な差別化要因
- Higher output current (4A) compared to ADUM3220 (2A) （vs ADUM3220ARZ-RL7)
- Lower UVLO threshold (4.1V) compared to ADUM3221BRZ (7.5V) （vs ADUM3221BRZ-RL7)
- Enhanced product (EP) option for extended temperature range （vs ADUM3221TRZ-EP)
設計ノート
Ensure that the input supply (VDD1) and output supply (VDD2) are properly decoupled with at least 0.1µF ceramic capacitors placed as close as possible to the respective pins. For high-current gate drive applications, a 10µF electrolytic capacitor may be needed on VDD2 to handle the transient current demands during switching.
Maintain a clean separation between the input and output grounds (GND1 and GND2) on the PCB to preserve the isolation barrier. Avoid routing high-voltage traces under the device. Use a solid ground plane on the output side to minimize parasitic inductance and ensure stable gate drive.
Do not exceed the absolute maximum ratings for VDD1 (3.0V to 5.5V) and VDD2 (4.5V to 18V). Also, ensure that the dead-time control pin (DT) is properly configured to prevent shoot-through in half-bridge applications. Refer to the datasheet for recommended resistor values for setting dead time.
コンプライアンス情報
RoHS compliant per Analog Devices product page. AEC-Q100 not applicable for this non-automotive grade part.
