UCC28712DR
| 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 | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | UCC28712 |
| REACH Status | REACH Unaffected |
| Standard Package | 2,500 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
UCC28712DR CV and CC flyback power supply controller 680Hz ~ 100kHz 7-SOIC
The UCC28712DR from TI is a constant-voltage (CV) and constant-current (CC) flyback power supply controller that leverages primary-side regulation (PSR) to eliminate the need for an optocoupler, 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 . 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 .
The UCC28712DR achieves less than 10 mW of no-load standby power, meeting stringent energy-efficiency standards . It operates in discontinuous conduction mode (DCM) with valley-switching to minimize switching losses, while combining frequency modulation (FM) and amplitude modulation (AM) to maintain high efficiency across all load ranges . Key specifications include a maximum switching frequency of 100 kHz, a 21V start-up voltage, and a 25 mA drive capability for external MOSFETs . The chip integrates comprehensive protection features including overvoltage, current limiting, and low-line protection, plus an NTC resistor interface for remote temperature sensing with fixed cable compensation .
Alternative Replacements
● The UCC28712D, the tube-packaged version of the same device with identical electrical specifications for low-volume prototyping
● The UCC28713D, offering similar performance with different fixed cable compensation levels for alternative cable drop requirements
● The STCH03LTR from STMicroelectronics, a primary-side PWM controller with similar no-load power and 100 kHz switching for low-power adapters
● The UCC28730DR, a higher-efficiency variant with advanced valley-switching for ultra-low standby applications in the same package
