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UCC28521
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Category:ACDC- and -DCDC-power supply
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Product Name:Advanced PWM/PFC combo controller with TEM/TEM modulation
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Manufacturers:TI
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Production Batch Number:10+
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Encapsulation:20SOIC
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Stock Status:There is stock
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Stock Quantity:5000
- Minimum order quantity: 1
- Details:
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The combined PFC/PWM controller of the UCC28521 with the UCC28528 provides complete control functionality for any offline power required with IEC1000-3-2 harmonic reduction system. By combining the control and drive signals of PFC and PWM stages into a single device, significant performance and cost advantages are beneficial.
Based on the UCC28511, an average current-mode control architecture for input voltage feed-forward of the new device is adopted. The main difference between the UCC28521/28 is the trailing/trailing edge (transmission electron microscopy/transmission electron microscopy) as the stage modulation scheme for the circuit/PWM. The UCC28528 PWM segment is different as it drops the UCC28521 with a non-turn bulk voltage. The UCC28528 PWM is an aid for low-power design.
characteristic
- The PFC and PWM power stages are controlled in one device
- PFC of trailing edge, trailing edge PWM modulation
- Built-in PFC and PWM sequencing turned up
- 2, Source and 3 Sink are suitable for PFC and PWM gate drive in both stages
- A typical rise time of 16 - ns and a fall time of 7 ns are 1 - NF load
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Features of PFC
- Continuous conduction mode operation for average current mode control
- High linear multiplier has a power factor of nearly 1
- Input voltage feed-forward implementation
- Improved load transient response
- Precise power limiting
- Zero power detection
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Features of PWM
- Peak current mode control operation
- 1:1 PFC: Pulse width modulation frequency option
- Programmable maximum duty cycle limit up to 90%
- Programmable soft-start
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apply
- Efficient server and desktop supplies
- AC-DC converters for efficient telecommunications
parameter
| |
UCC28521 |
| On/Off of Undervoltage Lockout Threshold (5) |
10.2/9.7 |
| Operating power supply (max) (5) |
18 |
| Starting current (mA) |
0.1 |
| Operating Supply Current (mA) |
4 |
| Actual operating frequency (max) (MHz) |
0.5 |
| Pins/Packets |
20SOIC |
andUCC28521Related ICs are:
| Model |
Manufacturers |
lot number |
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| UCC28521 |
TI |
10+ |
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Advanced PWM/PFC combo controller with TEM/TEM modulation |
| UCC28521DW |
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SOIC-20 |
Advanced PWM/PFC combination controller with transmission electron microscopy/transmission electron microscopy modulation |
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