UCC28711D
| 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 | UCC28711 |
| REACH Status | REACH Unaffected |
| Standard Package | 75 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
UCC28711D Converter Offline Flyback Topology 680Hz ~ 100kHz
The UCC28711D from Texas Instruments is a constant-voltage (CV) and constant-current (CC) flyback controller that leverages primary-side regulation (PSR) to eliminate the optocoupler and TL431 feedback circuitry, significantly reducing system cost and improving reliability . This device processes feedback information directly from the auxiliary flyback winding, delivering precise output regulation of ±5% across line and load variations without secondary-side components . Housed in a compact 7-pin SOIC package, the controller integrates a 700-V start-up switch and operates over a wide VDD range of 9V to 35V, supporting an industrial temperature range from -40°C to 125°C, making it ideal for compact, cost-sensitive isolated power designs.
Selection Advantage
The UCC28711D distinguishes itself through its primary-side regulation architecture, eliminating the optocoupler and its associated failure mechanisms for enhanced long-term reliability. Unlike standard controllers, it integrates a 700-V start-up switch enabling ultra-low standby power without sacrificing start-up time or transient response . The unique combination of NTC temperature sensing interface with 0 mV fixed cable compensation makes it the optimal choice for applications requiring direct output voltage sensing without compensation adjustments. Valley-switching operation, frequency dithering for EMI compliance, and wide VDD range allowing small bias capacitors provide a complete, feature-rich solution in a minimal 7-pin SOIC footprint.
Alternative flyback controllers
1. The UCC28712D, offering similar performance with fixed 300mV cable compensation for applications with longer output cables requiring voltage drop correction.
2. The UCC28713D, featuring the same NTC interface with fixed 150mV cable compensation for moderate cable length requirements.
3. The UCC28710D, which provides programmable cable compensation via external resistor for maximum design flexibility.
4. The UCC28730D, a zero-power standby variant with advanced wake-up monitoring for ultra-low standby applications.
5. The STCH03LTR from STMicroelectronics, a primary-side PWM controller with similar no-load power and 100kHz switching for low-power adapters.
