UCC28730-Q1 - Zero-Power Standby PSR Flyback Controller | TI
MPN: UCC28730-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for UCC28730-Q1 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:
UCC28730
β Drop-Inπ Reference alternative (not in catalog)
UCC28700-Q1
β Drop-Inπ Reference alternative (not in catalog)
UCC28700
β Drop-Inπ Reference alternative (not in catalog)
UCC28910
β Drop-Inπ Reference alternative (not in catalog)
UCC28911
β Drop-Inπ Reference alternative (not in catalog)
LM25180
β Drop-Inπ Reference alternative (not in catalog)
UCC28730-Q1 Maximum Ratings & Electrical Characteristics
| Topology | Flyback |
| Control Method | Primary-Side Regulation (PSR) |
| Switching Frequency | 32 Hz to 83 kHz |
| Minimum Switching Frequency | 30 Hz |
| No-Load Power | < 5 mW |
| Input Voltage Range | 40 V to 1000 V DC |
| Output Regulation | Constant Voltage (CV) and Constant Current (CC) |
| Optocoupler | Not Required |
| Startup Current Source | 700 V |
| Package | 7-SOIC (D) |
| Operating Temperature Range | -40Β°C to +150Β°C |
| Automotive Qualification | AEC-Q100 |
| Wake-Up Signal Detection | Yes |
| Frequency Dithering | Yes |
| RoHS Status | Compliant |
UCC28730-Q1 Pin Configuration
| Pin 1 | VS β Voltage sense input from auxiliary winding |
| Pin 2 | GND β Ground |
| Pin 3 | DRV β Gate drive output for external MOSFET |
| Pin 4 | CS β Current sense input |
| Pin 5 | VDD β Supply voltage |
| Pin 6 | FB β Feedback input for output regulation |
| Pin 7 | HV β High-voltage startup pin |
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
UCC28730-Q1 is suitable for 6 applications: Automotive Traction Inverter Bias Supply, On-Board Charger (OBC) Auxiliary Power, Industrial Power Supply, Battery Management System (BMS) Bias Supply, Motor Control Unit (MCU) Power Supply, Isolated DC-DC Converter for Telecom.
Automotive Traction Inverter Bias Supply
The UCC28730-Q1 is used to provide a bias supply for traction inverters in electric vehicles. It can produce three 100mA outputs from a 60V to 1000V DC input, as described in a TI reference design. Its automotive qualification and wide input range make it ideal for this application. The low no-load power consumption helps reduce battery drain when the vehicle is off.
Recommended
On-Board Charger (OBC) Auxiliary Power
In on-board chargers for electric vehicles, the UCC28730-Q1 provides auxiliary power for control circuits and gate drivers. Its primary-side regulation eliminates the optocoupler, improving reliability in high-voltage environments. The wide input range of 40V to 1000V DC accommodates varying battery voltages. The device's low standby power is beneficial for maintaining battery charge when the charger is idle.
Recommended
Industrial Power Supply
The UCC28730-Q1 is suitable for industrial power supplies requiring isolated DC-DC conversion. Its constant-voltage and constant-current regulation without an optocoupler simplifies design and reduces component count. The device operates over a wide input voltage range, making it adaptable to various industrial power rails. The low no-load power consumption helps meet energy efficiency standards.
Recommended
Battery Management System (BMS) Bias Supply
In battery management systems, the UCC28730-Q1 provides a bias supply for monitoring and protection circuits. Its automotive qualification ensures reliable operation in the harsh environment of a vehicle. The wide input range accommodates the varying voltage of the battery pack. The low standby power is crucial for minimizing battery drain when the vehicle is off.
Recommended
Motor Control Unit (MCU) Power Supply
The UCC28730-Q1 is used to provide a bias supply for motor control units in electric vehicles and industrial drives. Its primary-side regulation eliminates the optocoupler, improving reliability in high-vibration environments. The device's wide input range and low standby power make it suitable for always-on motor control systems. The automotive qualification ensures reliable operation in extreme temperatures.
Recommended
Isolated DC-DC Converter for Telecom
The UCC28730-Q1 can be used in isolated DC-DC converters for telecom equipment, providing a regulated output without an optocoupler. Its wide input range supports various telecom power rails, and its low no-load power helps reduce energy consumption in always-on systems. The device's constant-voltage and constant-current regulation ensures stable operation under varying loads.
Recommended
Recommended Products Summary
Engineering reference data for UCC28730-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | UCC28730 | UCC28700-Q1 | UCC28700 | UCC28910 | UCC28911 | LM25180 |
|---|---|---|---|---|---|---|---|
| Package | 7-SOIC (D) | 7-SOIC (D) | 7-SOIC (D) | 7-SOIC (D) | 7-SOIC (D) | 7-SOIC (D) | 7-SOIC (D) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Automotive Qualification | Yes (AEC-Q100) | No | Yes (AEC-Q100) | No | No | No | No |
| Switching Frequency Range | 32 Hz to 83 kHz | 32 Hz to 83 kHz | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| No-Load Power | < 5 mW | < 5 mW | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Input Voltage Range | 40 V to 1000 V DC | 40 V to 1000 V DC | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Optocoupler Required | No | No | No | No | No | No | No |
| Wake-Up Signal Detection | Yes | Yes | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Automotive qualification (AEC-Q100) (vs UCC28730)
- Ultra-low no-load power (< 5 mW) (vs UCC28700-Q1)
- Wide input voltage range (40V to 1000V) (vs LM25180)
Design Notes
Place the UCC28730-Q1 close to the transformer and MOSFET to minimize parasitic inductance and EMI. Keep the high-voltage startup pin (HV) traces short and away from sensitive feedback traces. Use a solid ground plane to reduce noise and improve thermal performance.
The UCC28730-Q1 is a controller and does not dissipate significant power itself, but the external MOSFET and transformer will generate heat. Ensure adequate copper area and airflow around these components. The SOIC-7 package has a thermal resistance of approximately 150Β°C/W, so keep the ambient temperature within limits.
Ensure the auxiliary winding is accurately coupled to the secondary to maintain output regulation. Incorrect transformer design can lead to poor CV/CC regulation. Also, verify the startup resistor value to ensure reliable startup at the minimum input voltage. Refer to the TI datasheet for design equations.
Compliance Information
Automotive qualified per AEC-Q100. RoHS compliant per TI product page.
