UCC28720D
ActiveCONSTANT-VOLTAGE, CONSTANT-CURRENT CONTROLLER WITH PRIMARY-SIDE REGULATION FOR BIPOLAR POWER DEVICES
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UCC28720D
ActiveCONSTANT-VOLTAGE, CONSTANT-CURRENT CONTROLLER WITH PRIMARY-SIDE REGULATION FOR BIPOLAR POWER DEVICES
Technical Specifications
Parameters and characteristics for this part
| Specification | UCC28720D |
|---|---|
| Fault Protection | Over Voltage, Current Limiting |
| Frequency - Switching [Max] | 80 kHz |
| Frequency - Switching [Min] | 650 Hz |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Isolation | Isolated |
| Package / Case | 8-SOIC |
| Package / Case | 0.154 in |
| Package / Case [custom] | 7 |
| Package / Case [custom] | 3.9 mm |
| Supplier Device Package | 7-SOIC |
| Topology | Flyback |
| Voltage - Start Up | 21 V |
| Voltage - Supply (Vcc/Vdd) [Max] | 35 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 9 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 1.11 | |
| 10 | $ 0.99 | |||
| 75 | $ 0.94 | |||
| 150 | $ 0.80 | |||
| 300 | $ 0.75 | |||
| 525 | $ 0.66 | |||
| Texas Instruments | TUBE | 1 | $ 1.30 | |
| 100 | $ 1.00 | |||
| 250 | $ 0.74 | |||
| 1000 | $ 0.53 | |||
Description
General part information
UCC28720 Series
The UCC28720 flyback power supply controller provides isolated-output Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.
An internal 700-V start-up switch, dynamically-controlled operating states and a tailored modulation profile support ultra-low standby power without sacrificing start-up time or output transient response.
Control algorithms in the UCC28720 allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a bipolar transistor power switch. Discontinuous conduction mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.
Documents
Technical documentation and resources