SM74104 - 1.8A, 100V Half-Bridge Gate Driver | Texas Instruments
Артикул: SM74104 ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.66 | $16,60 |
| 100 | $1.48 | $148,00 |
| 500 | $1.33 | $665,00 |
| 1.000 | $1.19 | $1.190,00 |
SM74104 Обзор
A half-bridge gate driver is a specialized integrated circuit that provides the necessary voltage and current to switch power MOSFETs or IGBTs in a half-bridge topology. It typically includes a floating high-side driver that can operate with a bootstrap supply, allowing the high-side MOSFET to be driven above the ground reference. This category of components is essential in synchronous buck converters, full-bridge converters, and motor drive circuits, where efficient and reliable switching is critical.
Key features of the SM74104 include a 1.8-A peak source and sink current, a wide input voltage range up to 100V, and an 8-V UVLO threshold that ensures proper operation during power-up. The adaptive delay feature automatically adjusts the dead-time between high-side and low-side switching, minimizing shoot-through current and improving efficiency. The device also offers a floating high-side driver with a bootstrap supply, enabling high-side MOSFET driving without an external isolated supply.
Technically, the SM74104 uses a level-shifting architecture to transfer the high-side gate signal across the voltage domain, with a bootstrap capacitor providing the necessary gate drive voltage. The adaptive delay circuit monitors the gate voltage and adjusts the turn-on delay to prevent cross-conduction, which is critical for reliable operation at high frequencies. The device is available in a small 8-pin SOIC package, making it easy to integrate into compact power designs.
Typical applications include synchronous buck converters for telecom and networking equipment, industrial power supplies, and motor control circuits. The SM74104 is particularly well-suited for applications where a single PWM control signal is available, as it simplifies the drive circuitry for both high-side and low-side MOSFETs. Its high-voltage capability and adaptive delay make it a robust choice for demanding power conversion environments.
When designing with the SM74104, ensure that the bootstrap capacitor is properly sized and that the UVLO threshold is considered for the input supply. The adaptive delay feature reduces the need for external dead-time circuitry, but the PCB layout should minimize parasitic inductance in the gate drive loop to achieve optimal performance.
Аналоги без доработки для SM74104 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
SM74104MAX/NOPB
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
LM5100
⚡ Тот же корпус ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
LM5101
⚡ Тот же корпус ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
UCC27211
⚡ Тот же корпус ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
IR2104
⚡ Тот же корпус ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
SM74104 Максимальные параметры и электрические характеристики
| Peak Output Current | 1.8 A |
| Supply Voltage (VDD) | 8 V to 14 V |
| High-Side Floating Supply Voltage | Up to 100 V |
| Undervoltage Lockout (UVLO) | 8 V |
| Adaptive Delay | Yes |
| Input Logic Level | TTL/CMOS compatible |
| Диапазон рабочих температур | -40°C to +125°C |
| Package Type | 8-pin SOIC |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant |
| Number of Channels | 2 (High-side and Low-side) |
Конфигурация выводов SM74104
| Контакт 1 | VDD — Low-side supply voltage |
| Контакт 2 | HIN — High-side input signal |
| Контакт 3 | LIN — Low-side input signal |
| Контакт 4 | GND — Ground |
| Контакт 5 | LO — Low-side gate drive output |
| Контакт 6 | HS — High-side floating return |
| Контакт 7 | HO — High-side gate drive output |
| Контакт 8 | VB — High-side floating supply |
Типичное применение
SM74104 подходит для 6 применениеs: Synchronous Buck Converters, Telecom Power Supplies, Industrial Power Supplies, Motor Control, Battery-Powered Systems, LED Lighting.
Synchronous Buck Converters
The SM74104 is specifically designed to drive high-side and low-side N-Channel MOSFETs in a synchronous buck converter. Its 1.8-A peak output current and adaptive delay ensure efficient switching with minimal dead-time losses. The floating high-side driver supports supply voltages up to 100V, making it suitable for telecom and industrial power supplies. The adaptive delay automatically prevents shoot-through, improving reliability and efficiency. With a single PWM input, it simplifies the drive circuitry, reducing component count and board space.
Рекомендуется
Telecom Power Supplies
In telecom power supplies, the SM74104 drives MOSFETs in synchronous buck converters that convert 48V bus voltages to lower rails. Its 100V high-side capability provides ample margin for voltage transients. The 8-V UVLO ensures reliable startup and operation. The adaptive delay minimizes switching losses, improving overall efficiency. The compact 8-pin SOIC package allows for dense PCB layouts, which is critical in space-constrained telecom equipment. The driver's robust performance ensures long-term reliability in demanding environments.
Рекомендуется
Industrial Power Supplies
The SM74104 is well-suited for industrial power supplies that require high-voltage half-bridge driving. Its 100V floating high-side driver can handle input voltages from 24V to 72V industrial buses. The 1.8-A peak current ensures fast switching of MOSFETs, reducing switching losses. The adaptive delay feature simplifies design by eliminating external dead-time circuitry. The device operates over a wide temperature range (-40°C to +125°C), making it suitable for harsh industrial environments. Its robust design ensures reliable operation in motor drives and power converters.
Рекомендуется
Motor Control
The SM74104 can be used in motor control applications to drive the high-side and low-side MOSFETs in a half-bridge configuration. Its 100V rating is suitable for small to medium motor drives. The 1.8-A peak output current provides sufficient gate drive for MOSFETs used in motor control. The adaptive delay prevents shoot-through, which is critical for reliable operation. The device's fast propagation delay ensures precise switching, improving motor performance. For full-bridge or three-phase motor control, multiple SM74104 devices can be used.
Рекомендуется
Battery-Powered Systems
In battery-powered systems, the SM74104 can be used in synchronous buck converters to efficiently step down battery voltage to lower rails. Its low quiescent current and adaptive delay help maximize battery life. The 8-V UVLO ensures proper operation as the battery discharges. The 100V high-side capability provides headroom for voltage spikes. The compact package is ideal for portable devices. The driver's efficiency is critical for extending battery life in applications like drones and portable equipment.
Рекомендуется
LED Lighting
The SM74104 can be used in LED lighting applications to drive MOSFETs in a synchronous buck converter for constant current control. Its high-voltage capability supports input voltages up to 100V, suitable for industrial LED lighting. The 1.8-A peak current ensures efficient switching. The adaptive delay reduces switching losses, improving overall efficiency. The device's small package is ideal for compact LED drivers. Its robust design ensures reliable operation in demanding lighting environments.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для SM74104 — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | SM74104MAX/NOPB | LM5100 | LM5101 | UCC27211 | IR2104 |
|---|---|---|---|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Infineon |
| Peak Output Current | 1.8 A | 1.8 A | 1 A | 1 A | 4 A | 0.29 A |
| High-Side Voltage Rating | 100 V | 100 V | 100 V | 100 V | 120 V | 600 V |
| UVLO Threshold | 8 V | 8 V | 8 V | 8 V | 7.5 V | 8.9 V |
| Adaptive Delay | Yes | Yes | No | No | No | No |
| Pinout Compatibility | Reference | Identical | Different | Different | Different | Different |
| Price (1pc) | $1.85 | $1.85 | $2.10 | $2.20 | $1.50 | $1.20 |
Ключевые отличия
- Adaptive delay feature (против LM5100)
- 1.8A peak output current (против IR2104)
- Optimized for synchronous buck (против LM5100)
Заметки по проектированию
Place the SM74104 as close as possible to the MOSFETs to minimize gate drive loop inductance. Use short, wide traces for the gate drive outputs (HO and LO) and the bootstrap capacitor. A low-inductance path is critical for fast switching and to reduce ringing. Ensure a solid ground plane under the driver to minimize noise.
The bootstrap capacitor (CB) must be sized to provide sufficient charge for the high-side gate drive. A typical value is 0.1uF to 1uF, depending on the gate charge of the high-side MOSFET. Use a low-ESR ceramic capacitor. Also, place a 0.1uF decoupling capacitor close to the VDD pin to filter high-frequency noise.
Ensure the VDD supply is above the 8V UVLO threshold before enabling the driver. If the supply is marginal, the driver may not operate correctly. Also, avoid exceeding the absolute maximum ratings for the high-side floating supply (VB) and the HS pin. The adaptive delay feature reduces dead-time, but verify that the external MOSFETs can handle the resulting switching speeds.
Информация о соответствии
RoHS compliant per TI product page. Other compliance data not specified in the provided data.
