STGAP4S - 4-Channel Isolated Gate Driver | STMicroelectronics
MPN: STGAP4S β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.44 | $5,440.00 |
Drop-in alternatives for STGAP4S β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
STGAP4S-Q1
β Drop-Inπ Reference alternative (not in catalog)
STGAP4S-TR
β Drop-Inπ Reference alternative (not in catalog)
UCC21520
β‘ Same Packageπ Reference alternative (not in catalog)
STGAP4S Maximum Ratings & Electrical Characteristics
| 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) |
| Operating Temperature | -40C to +125C |
| Package | SSOP-36 |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Enable Pin | Yes (per channel) |
| Fault Output | Yes |
| Miller Clamp | Yes (per channel) |
| Desaturation Protection | Yes |
STGAP4S Pin Configuration
| Pin 1 | VCC1 β Logic supply voltage |
| Pin 2 | GND1 β Logic ground |
| Pin 3 | INA β Input for channel A |
| Pin 4 | ENA β Enable for channel A |
| Pin 5 | INB β Input for channel B |
| Pin 6 | ENB β Enable for channel B |
| Pin 7 | INC β Input for channel C |
| Pin 8 | ENC β Enable for channel C |
| Pin 9 | IND β Input for channel D |
| Pin 10 | END β Enable for channel D |
| Pin 11 | FAULT β Fault output |
| Pin 12 | VCC2 β Driver supply voltage |
| Pin 13 | GND2 β Driver ground |
| Pin 14 | OUTA β Output for channel A |
| Pin 15 | OUTB β Output for channel B |
| Pin 16 | OUTC β Output for channel C |
| Pin 17 | OUTD β Output for channel D |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
STGAP4S is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for STGAP4S β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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) |
Key Differentiators
- 4-channel isolated gate driver (vs UCC21520)
- Higher isolation voltage (vs UCC21520)
- Automotive-grade option (vs STGAP4S-Q1)
Design Notes
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.
Compliance Information
RoHS compliant per STMicroelectronics datasheet. Not AEC-Q100 qualified - choose STGAP4S-Q1 for automotive.
