STGAP4S - 4-Channel Isolated Gate Driver | STMicroelectronics
MPN： STGAP4S ✓ 啟用中STGAP4S 概覽
An isolated gate driver is a type of gate driver that provides electrical isolation between the control circuitry and the power stage, protecting low-voltage logic from high-voltage transients and ground loops. It is a critical component in power electronics, enabling safe and reliable switching of power semiconductors. The STGAP4S belongs to the category of isolated gate drivers, which are part of the broader family of gate drivers, power management ICs, and semiconductor devices.
Key features of the STGAP4S include a 4 A peak output current per channel, a wide supply voltage range, and a propagation delay of 100 ns. It also features an interlock function to prevent cross-conduction, a dedicated enable pin for each channel, and a fault output for system monitoring. The device is available in a 36-pin SSOP package, offering a compact solution for multi-channel gate drive applications.
The STGAP4S utilizes STMicroelectronics' galvanic isolation technology, providing reinforced isolation up to 6 kV. The device includes a Miller clamp on each channel to prevent spurious turn-on of the power switch, and a desaturation protection feature for overcurrent detection. The architecture ensures high noise immunity and reliable operation in harsh industrial environments.
Typical applications include motor drives, three-phase inverters, uninterruptible power supplies (UPS), and industrial power supplies. The STGAP4S is also suitable for renewable energy systems such as solar inverters and wind turbine converters. Its high CMTI and low propagation delay make it ideal for high-frequency switching applications.
When designing with the STGAP4S, it is important to ensure proper PCB layout to minimize parasitic inductance and maintain signal integrity. The device requires careful attention to the isolation barrier and creepage distances to meet safety standards. Additionally, the supply decoupling should be implemented with low-ESR capacitors close to the VCC and GND pins.
直接替換替代品，適用於 STGAP4S — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
STGAP4S-Q1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STGAP4S-TR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STGAP4S 最大額定值與電氣特性
| Number of Channels | 4 |
| Isolation Type | Galvanic |
| Peak Output Current | 4 A per channel |
| Logic Supply Voltage | 4.5 V to 18 V |
| Driver Supply Voltage | 4.5 V to 18 V |
| Propagation Delay | 100 ns |
| Common-Mode Transient Immunity (CMTI) | 100 V/ns |
| Isolation Voltage | 6 kV (reinforced) |
| 工作溫度 | -40C to +125C |
| 封裝 | SSOP-36 |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| 致能腳位 | Yes (per channel) |
| Fault Output | Yes |
| Miller Clamp | Yes (per channel) |
| Desaturation Protection | Yes |
STGAP4S 腳位配置
| 腳位 1 | VCC1 — Logic supply voltage |
| 腳位 2 | GND1 — Logic ground |
| 腳位 3 | INA — Input for channel A |
| 腳位 4 | ENA — Enable for channel A |
| 腳位 5 | INB — Input for channel B |
| 腳位 6 | ENB — Enable for channel B |
| 腳位 7 | INC — Input for channel C |
| 腳位 8 | ENC — Enable for channel C |
| 腳位 9 | IND — Input for channel D |
| 腳位 10 | END — Enable for channel D |
| 腳位 11 | FAULT — Fault output |
| 腳位 12 | VCC2 — Driver supply voltage |
| 腳位 13 | GND2 — Driver ground |
| 腳位 14 | OUTA — Output for channel A |
| 腳位 15 | OUTB — Output for channel B |
| 腳位 16 | OUTC — Output for channel C |
| 腳位 17 | OUTD — Output for channel D |
典型應用
STGAP4S 適用於 6 應用s: Motor Drives, Three-Phase Inverters, Uninterruptible Power Supplies (UPS), Industrial Power Supplies, Renewable Energy Systems, Electric Vehicle Charging.
Motor Drives
The STGAP4S is ideal for motor drives, providing four isolated channels for three-phase inverters. Its 4 A peak output current and 100 V/ns CMTI ensure reliable switching of IGBTs and MOSFETs in industrial motor control. The device's interlock function prevents cross-conduction, enhancing system safety. In a typical motor drive, the STGAP4S is placed between the microcontroller and the power stage, with each channel driving a separate phase. The high isolation voltage (6 kV) protects the control logic from high-voltage transients. The low propagation delay (100 ns) enables high-frequency PWM operation, improving motor efficiency. Designers should ensure proper PCB layout to minimize parasitic inductance and maintain signal integrity.
推薦
Three-Phase Inverters
The STGAP4S is well-suited for three-phase inverters, offering four channels to drive the six switches in a typical inverter topology. Its 4 A peak output current and 100 V/ns CMTI ensure fast and reliable switching, reducing switching losses. The device's desaturation protection detects overcurrent conditions, protecting the power switches. In a solar inverter application, the STGAP4S is used to drive the IGBTs in the DC-AC conversion stage. The high isolation voltage (6 kV) ensures safety in high-voltage systems. The device's enable pins allow individual channel control, enabling flexible system design. Designers should consider the thermal performance of the SSOP-36 package and provide adequate cooling.
推薦
Uninterruptible Power Supplies (UPS)
The STGAP4S is used in UPS systems to drive the power switches in the inverter and rectifier stages. Its four channels provide the necessary isolation and drive capability for high-power IGBTs. The device's 100 ns propagation delay ensures fast response to load changes, maintaining output voltage stability. The high CMTI (100 V/ns) ensures reliable operation in noisy environments. In a UPS, the STGAP4S is placed between the DSP controller and the power stage, with each channel driving a separate switch. The device's fault output provides system monitoring, enabling early detection of failures. Designers should ensure proper isolation and creepage distances to meet safety standards.
推薦
Industrial Power Supplies
The STGAP4S is suitable for industrial power supplies, providing isolated gate drive for switching regulators and converters. Its 4 A peak output current and wide supply voltage range (4.5 V to 18 V) make it versatile for various topologies. The device's Miller clamp prevents spurious turn-on, improving reliability. In a typical industrial power supply, the STGAP4S drives the main switch in a flyback or forward converter. The high isolation voltage (6 kV) ensures safety in high-voltage applications. The device's enable pins allow power sequencing, which is critical for multi-rail systems. Designers should pay attention to the thermal management of the package.
推薦
Renewable Energy Systems
The STGAP4S is used in renewable energy systems such as solar inverters and wind turbine converters. Its four channels provide the necessary isolation and drive capability for high-power IGBTs. The device's 100 V/ns CMTI ensures reliable operation in harsh environments. In a solar inverter, the STGAP4S drives the IGBTs in the DC-AC conversion stage. The high isolation voltage (6 kV) ensures safety in high-voltage systems. The device's desaturation protection detects overcurrent conditions, protecting the power switches. Designers should consider the operating temperature range (-40C to +125C) for outdoor installations.
推薦
Electric Vehicle Charging
The STGAP4S is suitable for electric vehicle charging stations, providing isolated gate drive for the power stage. Its 4 A peak output current and high isolation voltage (6 kV) ensure safe and reliable operation. The device's interlock function prevents cross-conduction, enhancing system safety. In a charging station, the STGAP4S drives the IGBTs in the AC-DC and DC-DC conversion stages. The high CMTI (100 V/ns) ensures reliable operation in noisy environments. The device's fault output provides system monitoring, enabling early detection of failures. Designers should ensure proper thermal management for high-power applications.
推薦
推薦產品摘要
工程參考資料，適用於 STGAP4S — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | STGAP4S-Q1 | STGAP4S-TR | UCC21520 |
|---|---|---|---|---|
| Package | SSOP-36 | SSOP-36 - same | SSOP-36 - same | SSOP-36 - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments |
| Number of Channels | 4 | 4 | 4 | 2 |
| Peak Output Current | 4 A | 4 A | 4 A | 4 A |
| Isolation Voltage | 6 kV | 6 kV | 6 kV | 5.7 kV |
| Propagation Delay | 100 ns | 100 ns | 100 ns | 30 ns |
| CMTI | 100 V/ns | 100 V/ns | 100 V/ns | 100 V/ns |
| Enable Pin | Yes (per channel) | Yes (per channel) | Yes (per channel) | Yes (per channel) |
主要差異化特點
- 4-channel isolated gate driver (對比UCC21520)
- Higher isolation voltage (對比UCC21520)
- Automotive-grade option (對比STGAP4S-Q1)
設計說明
Ensure proper PCB layout with short, wide traces for the output pins to minimize parasitic inductance. Place decoupling capacitors (100 nF and 10 uF) close to the VCC1 and VCC2 pins. Maintain adequate creepage and clearance distances between the logic and driver sides to meet isolation safety standards.
The SSOP-36 package has a thermal resistance of approximately 40 C/W. At high switching frequencies and output currents, the power dissipation can be significant. Use a thermal pad and adequate copper pour on the PCB to dissipate heat. Consider forced air cooling for high-power applications.
Do not exceed the absolute maximum supply voltage of 18 V on VCC1 or VCC2. Ensure the input signals are properly referenced to GND1 and have sufficient drive strength. The enable pins must be pulled high or low as required; floating enable pins can cause unpredictable operation. Verify the interlock function is correctly configured to prevent cross-conduction.
合規資訊
RoHS compliant per STMicroelectronics datasheet. Not AEC-Q100 qualified - choose STGAP4S-Q1 for automotive.
