QA152C3
2W isolated DC/DC for IGBT gate drivers with 3000V isolation, dual output +15V/-8V, 15pF capacitance, compact SMD12 package.
Product Overview
Description
The QA152C3 is a 2W isolated DC/DC converter specifically designed for IGBT gate driver applications. It features 3000VDC isolation, dual outputs (+15V/-8V) suitable for IGBT gate drive, and low isolation capacitance of 15pF typical. This converter provides reliable isolation for motor drives, inverters, and power conversion systems in a compact SMD12 package.
Product Series
QA Series
Primary Application
IGBT gate driver power supply
Key Features
- 3000VDC isolation voltage
- Dual output +15V/-8V for IGBT gate drive
- Low isolation capacitance 15pF
- High CMTI 15kV/us
- Wide operating temperature -40°C to +105°C
- Compact SMD12 package
- Continuous barrier withstand voltage
- UL/EN 62368-1 certified
Specifications
| Input Voltage | 4.5-5.5VDC (5V nominal) |
|---|---|
| Output Power | 2W |
| Output Voltage | +15V/-8V (dual output) |
| Output Current | +67mA/-67mA |
| Isolation Voltage | 3000VDC |
| Isolation Capacitance | 15pF typical |
| CMTI | 15kV/us minimum |
| Operating Temperature | -40°C to +105°C |
| Package | SMD12 |
| Dimensions | 15.2 x 12.7 x 5.7mm |
| Efficiency | Up to 80% |
| Switching Frequency | 350kHz |
| Load Regulation | ±1% |
| Line Regulation | ±0.5% |
| Safety Standards | UL 62368-1, EN 62368-1 |
| MTBF | >1,000,000 hours |
Applications
IGBT gate driver power supply
Motor drive and control systems
Motor drive inverters
Motor drive and control systems
Industrial power supplies
Industrial automation and control
Space-constrained designs
Electronic system design
UPS systems
Electronic system design
Renewable energy inverters
Renewable energy systems
FAE Expert Insights
"Based on extensive field experience, this product delivers excellent performance across various operating conditions. The design incorporates proven architecture with robust protection features. Customers consistently report high satisfaction with reliability and ease of integration."
— Field Application Engineer, BeiLuo
Frequently Asked Questions
What is the difference between QA152C3 and QA151C3?
The QA152C3 is a compact version of the QA151C3. Key differences: Package size - SMD12 (15.2x12.7mm) vs SMD16 (19.9x16.9mm). Output power - 2W vs 3W. Output current - ±67mA vs ±100mA. Both have the same 3000V isolation, 15pF capacitance, and 15kV/us CMTI. Choose QA152C3 for space-constrained designs with lower power requirements. Choose QA151C3 for higher power applications.
Choose QA152C3 for compact designs. Choose QA151C3 for higher power requirements.
How do I calculate the required power for gate driver supply?
Gate driver power calculation: Gate charge power P = Qg × Vgate × fsw, where Qg is total gate charge from IGBT datasheet, Vgate is gate voltage swing (23V for +15V/-8V), and fsw is switching frequency. Add driver IC quiescent power. Example: IGBT with Qg=150nC at 10kHz: Gate power = 150nC × 23V × 10kHz = 34.5mW. Driver IC: 15mA × 23V = 345mW. Total per channel = 379.5mW. For 4 IGBTs: 1.52W. Select 2W supply with margin.
Calculate based on gate charge, switching frequency, and driver quiescent current. Add 30% margin for reliable operation.
What is the recommended PCB layout for QA152C3?
PCB layout guidelines for QA152C3: Maintain >5mm creepage and >3mm clearance for basic isolation. Use slots or barriers to increase creepage distance. Keep input side (5V, control ground) well separated from output side (+15V/-8V, power ground). Place input capacitor close to pins. Place output capacitors close to output pins. Minimize loop area of output connections. Keep supply away from magnetic components. Use 4-layer PCB with dedicated ground planes.
Maintain proper isolation spacing, minimize trace inductance, and follow manufacturer layout guidelines for reliable operation.
Can QA152C3 be used for both high-side and low-side gate drivers?
Yes, QA152C3 can be used for both high-side and low-side gate drivers. Each gate driver requires its own isolated supply. For a half-bridge configuration, you need two QA152C3 supplies - one for high-side and one for low-side. The isolation voltage must exceed the DC bus voltage with safety margin. 3000V isolation is sufficient for most 380V/480V AC systems (approximately 600V DC bus).
Use one supply per gate driver. Ensure isolation voltage exceeds DC bus voltage. Use QA-R series for higher voltage systems.
What input capacitor is recommended for QA152C3?
Use 10µF ceramic capacitor close to the input pins. Low ESR is important for stable operation. Voltage rating should be at least 10V for 5V input. Additional 0.1µF ceramic capacitor in parallel can help with high-frequency noise. Keep traces short to minimize inductance.
Use 10µF + 0.1µF ceramic capacitors close to input pins. Contact us for specific application recommendations.