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TI UCC28740DR
Converter Offline Flyback Topology 170Hz ~ 100kHz 7-SOIC
Brands: Texas Instruments
Mfr.Part #: UCC28740DR
Datasheet: UCC28740DR Datasheet (PDF)
Package/Case: SOIC (D)-7
RoHS Status:
Stock Condition: 6731 pcs, New Original
Product Type: Switching Controllers
Warranty: 1 Year Ovaga Warranty - Find Out More
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*All prices are in USD
| Qty | Unit Price | Ext Price |
|---|---|---|
| 1 | $0.785 | $0.785 |
| 10 | $0.644 | $6.440 |
| 30 | $0.576 | $17.280 |
| 100 | $0.497 | $49.700 |
| 500 | $0.455 | $227.500 |
| 1000 | $0.435 | $435.000 |
In Stock:6731 PCS
UCC28740DR General Description
The UCC28740 isolated-flyback power-supply controller provides Constant-Voltage (CV) using an optical coupler to improve transient response to large-load steps. Constant-Current (CC) regulation is accomplished through Primary-Side Regulation (PSR) techniques. This device processes information from opto-coupled feedback and an auxiliary flyback winding for precise high-performance control of output voltage and current.
An internal 700-V startup switch, dynamically controlled operating states, and a tailored modulation profile support ultra-low standby power without sacrificing startup time or output transient response.
Control algorithms in the UCC28740 allow operating efficiencies to meet or exceed applicable standards. The drive output interfaces to a MOSFET 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.
The controller has a maximum switching frequency of 100 kHz and always maintains control of the peak-primary current in the transformer. Protection features keep primary and secondary component stresses in check. A minimum switching frequency of 170 Hz facilitates the achievement of less than 10-mW no-load power.
Features
- Less than 10-mW No-Load Power Capability
- Optocoupled Feedback for CV, and
Primary-Side Regulation (PSR) for CC - Enables ±1% Voltage Regulation and ±5% Current Regulation Across Line and Load
- 700-V Startup Switch
- 100-kHz Maximum Switching Frequency Enables High-Power-Density Charger Designs
- Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency
- Frequency Dithering to Ease EMI Compliance
- Clamped Gate-Drive Output for MOSFET
- Overvoltage, Low-Line, and Overcurrent Protection Functions
- SOIC-7 Package
- Create a Custom Design Using the UCC28740 With the WEBENCH® Power Designer
Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer | Texas Instruments | Product Category | Switching Controllers |
| RoHS | Details | Topology | Flyback |
| Number of Outputs | 1 Output | Switching Frequency | 170 Hz to 100 kHz |
| Duty Cycle - Max | 99 % | Input Voltage | 9 V to 35 V |
| Output Voltage | 14 V | Output Current | 25 mA |
| Minimum Operating Temperature | - 40 C | Maximum Operating Temperature | + 125 C |
| Mounting Style | SMD/SMT | Package / Case | SOIC-7 |
| Brand | Texas Instruments | Operating Supply Voltage | 8.1 V to 35 V |
| Product Type | Switching Controllers | Series | UCC28740 |
| Factory Pack Quantity | 2500 | Subcategory | PMIC - Power Management ICs |
| Type | Current Mode PWM Controllers |
Shipping
| Shipping Type | Ship Fee | Lead Time | |
|---|---|---|---|
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DHL | $20.00-$40.00 (0.50 KG) | 2-5 days |
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Fedex | $20.00-$40.00 (0.50 KG) | 2-5 days |
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UPS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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TNT | $20.00-$40.00 (0.50 KG) | 2-5 days |
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EMS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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REGISTERED AIR MAIL | $20.00-$40.00 (0.50 KG) | 2-5 days |
Processing Time：Shipping fee depend on different zone and country.
Payment
| Terms of payment | Hand Fee | |
|---|---|---|
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Wire Transfer | charge US$30.00 banking fee. |
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Paypal | charge 4.0% service fee. |
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Credit Card | charge 3.5% service fee. |
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Western Union | charge US.00 banking fee. |
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Money Gram | charge US$0.00 banking fee. |
Guarantees
1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
Packing
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All the products will packing in anti-staticbag. Ship with ESD antistatic protection.
Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.
We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.
After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.
Part points
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The UCC28740DR chip is a highly integrated secondary-side PWM controller that provides active power factor correction (PFC) for offline power supplies. It operates with constant voltage and constant current regulation, making it suitable for a wide range of applications. With a simplified control scheme and low power consumption, it offers improved efficiency and performance for power supply designs.
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Features
The UCC28740DR is a highly integrated primary-side regulated flyback controller. It features accurate constant voltage (CV) and constant current (CC) regulation, wide input voltage range, low standby power consumption, and overvoltage/overcurrent protection. It also integrates a high-voltage startup circuit and advanced power management functions, making it suitable for a wide range of applications such as battery chargers and AC-DC power supplies. -
Pinout
The UCC28740DR is a power factor correction (PFC) controller. It has 6 pins in total. The pin functions are as follows: 1. GND: Ground 2. HV: High Voltage input 3. FB: Feedback input 4. CS: Current sense input 5. VDD: Voltage supply 6. VDDC: Voltage supply for control circuits. -
Manufacturer
The manufacturer of the UCC28740DR is Texas Instruments (TI). Texas Instruments is an American multinational company that designs and manufactures semiconductors and various integrated circuits. They develop a wide range of electronic products for industrial, automotive, personal electronics, and communication applications, serving customers worldwide. -
Application Field
The UCC28740DR is primarily used in offline flyback power supplies for various applications such as equipment adapters, power over Ethernet (PoE), LED lighting, and industrial power supplies. It offers a wide input voltage range, high efficiency, and advanced features like constant voltage and constant current regulation, making it suitable for a range of power supply designs. -
Package
The UCC28740DR chip is a surface-mount package type, specifically a SOIC-8 form factor. Its dimensions are 3.91mm x 4.90mm.
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