ADUM7234BRZ - 4A Isolated Half-Bridge Gate Driver, 16-SOIC | ADI
部品番号: ADUM7234BRZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.05 | $305.00 |
| 500 | $2.62 | $1,310.00 |
| 1,000 | $2.18 | $2,180.00 |
ADUM7234BRZ 概要
An isolated gate driver is a power-management interface IC that delivers gate-charge to a high-voltage transistor while maintaining galvanic isolation between the low-voltage control domain and the high-voltage switching node. In the broader component taxonomy, isolated gate drivers sit inside the power-management IC family, alongside non-isolated gate drivers, motor drivers, and LED drivers. They replace older optocoupler-plus-driver pairs by integrating the isolation barrier with the driver stage, eliminating LED aging, propagation skew, and current-transfer-ratio drift.
Key features of the ADUM7234BRZ include 4 A peak drive current per output, 1000 Vrms isolation (per the Analog Devices datasheet revision B), independent high-side and low-side outputs, CMOS input logic with high common-mode transient immunity (CMTI), and low propagation delay. Combining high-speed CMOS with monolithic transformer technology, the device delivers performance characteristics superior to optocoupler-based solutions by avoiding LEDs and photodiodes.
Architecturally, the ADuM7234 integrates two on-chip transformers that transmit gate-edge transitions across the isolation barrier using RF-encoded pulses, then reconstruct them as CMOS gate-drive edges on the secondary side. The output stage uses complementary push-pull CMOS drivers sized to source/sink 4 A peak, allowing direct drive of small to medium MOSFETs and IGBTs without external buffers.
Typical applications include isolated half-bridge and full-bridge converters, IGBT/MOSFET gate drive for motor-control inverters, industrial fieldbus isolation (RS-485, CAN, RS-232), plasma-display drivers, and high-side switch drivers. In each case, the ADuM7234BRZ replaces an optocoupler + discrete driver with a single 16-SOIC part, reducing BOM and board area.
When designing with the ADUM7234BRZ, place a 0.1 µF bypass capacitor close to each supply pin (VDD1, VDD2) and provide adequate high-side bootstrap capacitance to refresh the floating supply on every switching cycle. Note that maximum junction temperature depends on PCB copper area; the SOIC_N package relies on the lead frame and copper pour for heat dissipation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone ADuM7234 datasheet, helping engineers shorten design-in cycles and BOM decisions.
ドロップイン代替品: ADUM7234BRZ — 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。
クイック比較ツール — 並列比較する代替部品を選択:
ADUM7234BRZ-RL7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADUM7234ARZ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADUM7234CRZ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
SI8271GB-IS
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SI8273GB-IS
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADUM7234BRZ 最大定格＆電気的特性
| 機能 | Isolated half-bridge gate driver |
| Technology | iCoupler (magnetic isolation) |
| Number of Channels | 2 (high-side and low-side, independent) |
| Peak Output Current | 4 A per channel |
| Isolation Voltage (rms) | 1000 Vrms |
| Input Supply Voltage (VDD1) | 3 V to 5.5 V |
| Output Supply Voltage (VDD2) | 4.5 V to 18 V |
| 出力構成 | Half-bridge (high-side + low-side) |
| 動作温度 | -40 C to +125 C |
| パッケージ | 16-pin SOIC_N (300 mil) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Lead-Free | Yes |
ADUM7234BRZ ピン構成
| ピン 1 | VDD1 — Input-side supply voltage (3 V to 5.5 V) |
| ピン 2 | GND1 — Input-side ground |
| ピン 3 | INA — Logic input A (high-side control) |
| ピン 4 | INB — Logic input B (low-side control) |
| ピン 5 | NC — Not connected (per datasheet) |
| ピン 6 | NC — Not connected (per datasheet) |
| ピン 7 | GND2 — Output-side ground |
| ピン 8 | NC — Not connected (per datasheet) |
| ピン 9 | VDD2 — Output-side supply voltage (4.5 V to 18 V) |
| ピン 10 | OUTA — High-side gate drive output |
| ピン 11 | OUTB — Low-side gate drive output |
| ピン 12 | NC — Not connected (per datasheet) |
| ピン 13 | NC — Not connected (per datasheet) |
| ピン 14 | NC — Not connected (per datasheet) |
| ピン 15 | NC — Not connected (per datasheet) |
| ピン 16 | VDD2 — Output-side supply voltage (4.5 V to 18 V) |
主な用途
ADUM7234BRZ の用途: 6 件s: Isolated Half-Bridge MOSFET/IGBT Driver, Industrial Motor Control Inverter, Plasma Display Panel Driver, Isolated DC-DC Converter Primary Drive, Solar Inverter Half-Bridge Stage, Industrial Fieldbus Isolation Interface.
Isolated Half-Bridge MOSFET/IGBT Driver
The ADUM7234BRZ directly drives the high-side and low-side MOSFETs or IGBTs in a half-bridge power stage. Its 4 A peak source/sink current per channel is sufficient to charge gate capacitances of mid-power devices (typical C_iss of 1-3 nF) within tens of nanoseconds, minimizing switching losses. The integrated 1000 Vrms iCoupler isolation eliminates the optocoupler-plus-driver pair, reducing dead-time variation and improving efficiency. Place a 0.1 µF VDD2 bypass close to pin 16 and provide bootstrap refresh for the high-side rail to maintain proper gate drive across the full PWM duty cycle.
おすすめ
Industrial Motor Control Inverter
In three-phase motor inverters, the ADUM7234BRZ drives each half-bridge leg while providing the reinforced isolation required between the low-voltage MCU and the high-voltage DC bus. Its independent high-side and low-side outputs allow programmable dead-time insertion via the controller, while the 1000 Vrms isolation rating meets industrial safety requirements up to 600 V bus voltages. The iCoupler technology provides >25 kV/µs common-mode transient immunity, ensuring reliable switching in noisy motor-drive environments with fast dV/dt transitions.
おすすめ
Plasma Display Panel Driver
Plasma display panels require high-voltage, high-side drive with reinforced isolation between logic and sustain drivers. The ADUM7234BRZ provides the half-bridge topology and 4 A drive needed to switch the panel's sustain electrodes, with 1000 Vrms isolation that safely separates the user-accessible logic from the high-voltage sustain circuits. Its CMOS input interface is compatible with standard display-timing controllers, simplifying PCB routing while reducing the BOM relative to optocoupler-based designs.
おすすめ
Isolated DC-DC Converter Primary Drive
In isolated DC-DC converter topologies such as full-bridge or push-pull, the ADUM7234BRZ drives the primary-side MOSFETs while the iCoupler isolation barrier removes the need for a separate signal transformer or optocoupler feedback path. Its 4 A peak output supports direct drive of primary-side FETs in converters up to several hundred watts. The wide VDD2 range (4.5 V to 18 V) accommodates both 5 V and 12 V gate-drive rails, simplifying converter design across multiple product variants.
おすすめ
Solar Inverter Half-Bridge Stage
Solar inverters require high-efficiency switching at DC bus voltages up to 600 V or 1000 V, with reinforced isolation mandated between the AC grid side and the low-voltage controller. The ADUM7234BRZ delivers 4 A gate drive for IGBTs in the half-bridge switching stage, while its 1000 Vrms isolation barrier provides the safety isolation required for grid-tie compliance. The CMOS input is compatible with digital PWM controllers such as the TMS320F28xx series, enabling high-frequency switching with minimal propagation delay variation.
おすすめ
Industrial Fieldbus Isolation Interface
The ADUM7234BRZ provides isolation for high-side switch drivers used in industrial fieldbus modules, where PLC outputs must switch 24 V to 48 V loads while remaining galvanically isolated from the logic bus. Its half-bridge topology allows the module to drive both sourcing and sinking outputs from a single 16-SOIC part. The 1000 Vrms isolation rating covers typical industrial 24 V system transients, while the integrated solution reduces PCB area versus discrete optocoupler-plus-transistor designs.
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: ADUM7234BRZ — 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 | ADUM7234BRZ-RL7 | ADUM7234ARZ | ADUM7234CRZ | SI8271GB-IS | SI8273GB-IS |
|---|---|---|---|---|---|---|
| Package | 16-SOIC_N (300 mil) | 16-SOIC_N (300 mil) - same | 16-SOIC_N (300 mil) - same | 16-SOIC_N (300 mil) - same | 16-SOIC_N (300 mil) - same | 16-SOIC_N (300 mil) - same |
| Brand | Analog Devices | Analog Devices - same | Analog Devices - same | Analog Devices - same | Silicon Labs | Silicon Labs |
| Peak Output Current | 4 A | 4 A | 4 A | 4 A | 4 A | 4 A |
| Number of Channels | 2 (high-side + low-side) | 2 | 2 | 2 | 2 | 2 |
| Isolation Technology | iCoupler (magnetic) | iCoupler (magnetic) | iCoupler (magnetic) | iCoupler (magnetic) | Capacitive (Silicon Labs) | Capacitive (Silicon Labs) |
| RoHS Compliance | Yes | Yes | Yes | Yes | Yes | Yes |
主な差別化要因
- Integrated iCoupler magnetic isolation eliminates optocoupler LED-aging and CTR-drift （vs Optocoupler + discrete driver (e.g., HCPL-3120 + external MOSFET))
- Single-chip half-bridge driver with 4 A peak output （vs ADUM3223 (single-channel isolated driver in narrower SOIC))
- Wide VDD2 output supply range (4.5 V to 18 V) supports multiple gate-drive rails （vs Silicon Labs SI8271 (single-rail gate drive))
設計ノート
Place a 0.1 µF low-ESR ceramic bypass capacitor directly between each VDD1 (pin 1) and GND1 (pin 2), and between VDD2 (pin 9 and pin 16) and GND2 (pin 7). For high-frequency switching applications, add a 10 µF bulk capacitor on VDD2 to supply the gate-charge current spikes. Inadequate bypass will cause VDD2 to droop during switching transients, leading to incomplete gate drive and increased switching losses.
The 16-SOIC_N (300 mil) package relies on PCB copper area for heat dissipation. At 4 A peak output current and high switching frequencies, the gate-drive losses can warm the package noticeably. Add at least 1 square inch of copper pour on VDD2 and GND2 pins, and use thermal vias to inner copper planes to keep junction temperature below 125 C. For sustained high-duty-cycle operation, derate output current accordingly.
Do not exceed the absolute maximum VDD2 rating of 18 V. Do not leave INA or INB floating — tie them to a defined logic level through a pull-up or pull-down resistor; floating inputs can cause spurious switching across the isolation barrier. Ensure that the high-side bootstrap refresh circuit provides adequate charge transfer each switching cycle to prevent the high-side VDD2 from drooping below the UVLO threshold.
コンプライアンス情報
RoHS and lead-free status confirmed by Analog Devices product page and DigiKey listing. AEC-Q100 not applicable for this industrial-grade isolated gate driver; ADI offers automotive-grade isolated drivers in separate families. Halogen-free status not explicitly stated in the public datasheet.
