UCC28712D
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 8-SOIC (0.154", 3.90mm Width), 7 Leads |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Voltage - Breakdown | - |
| Supplier Device Package | 7-SOIC |
| Fault Protection | Current Limiting, Over Voltage |
| Topology | Flyback |
| Voltage - Supply (Vcc/Vdd) | 9V ~ 35V |
| Control Features | - |
| Frequency - Switching | 680Hz ~ 100kHz |
| Internal Switch(s) | No |
| Voltage - Start Up | 21 V |
| Duty Cycle | - |
| Output Isolation | Isolated |
| Package | Tube |
| Product Status | Active |
| Base Product Number | UCC28712 |
| REACH Status | REACH Unaffected |
| Standard Package | 75 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
UCC28712D Constant-Voltage Constant-Current Controller 680Hz ~ 100kHz 7-SOIC
The UCC28712D is a high-performance, primary-side regulation (PSR) PWM controller manufactured by Texas Instruments, designed for isolated AC/DC flyback converters without requiring an optocoupler. Housed in a compact 7-SOIC package (tube packaging), it operates from 9V to 38V supply voltage and supports a wide industrial temperature range of -40°C to +125°C. As part of the UCC2871x family, it integrates a 700V high-voltage startup switch, enabling ultra-low standby power and efficient offline power supply operation.
Key Features & Application Scenarios
This controller delivers constant-voltage (CV) and constant-current (CC) regulation with ±5% accuracy across line and load conditions, operating in discontinuous conduction mode (DCM) with valley switching for high efficiency. It features a fixed 106kHz switching frequency, 150mV cable compensation, and NTC temperature sensing capability, along with green mode operation for light-load efficiency. Integrated protection includes overcurrent protection (OCP), input line monitoring, leading-edge blanking, and soft-start. Ideal for low-power AC/DC adapters, battery chargers, LED drivers, home appliances, and industrial power supplies, it eliminates optocouplers and secondary-side feedback circuits, simplifying design and reducing BOM cost.
Alternative Equivalent Models
● UCC28710D: TI pin-compatible PSR controller with 150mV cable compensation, 106kHz frequency, and identical DCM operation for cost-sensitive designs.
● UCC28713DR: TI SOIC-7 variant with 300mV cable compensation, NTC support, and 106kHz switching frequency for higher power adapter applications.
● UCC28730DR: TI 83kHz PSR controller with enhanced light-load efficiency and integrated overvoltage protection for low-power flyback converters.
● onsemi NCP1014: 7-pin SOIC PSR controller with 100kHz frequency, optocoupler-free operation, and high-voltage startup for low-power AC/DC adapters.
● STMicroelectronics VIPER22: 7-pin SOIC flyback controller with PSR, 100kHz frequency, and integrated 700V startup switch for offline power supplies.
