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UCC2889
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Category:ACDC- and -DCDC-power supply
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Product Name:Offline power controller
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Manufacturers:TI
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Production Batch Number:09+
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Encapsulation:8PDIP, 8SOIC
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Stock Status:There is stock
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Stock Quantity:8500
- Minimum order quantity: 1
- Details:
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The UCC1889 controller is optimized for use with offline, low-power, low-voltage, regulated bias power supplies. Unique circuit topology, this device can be seen as two cascaded flyback converters, each in continuous operation, driven from a single external power switch. The significant advantages of this method are the ability to achieve a voltage conversion ratio of 400V and transformerless internal losses as low as 12V.
The control algorithm used by the UCC1889 is an input voltage that forces the switching time to be inversely proportional, while the off-time switch is an inversely proportional output voltage. This action is referenced by an internal automatic feedback control loop and reference.
characteristic
- Transformer offline application
- Ideal primary-side bias power supply
- Efficient BiCMOS design
- Wide input range
- Low fixed or adjustable output voltage
- Low-cost SMD inductors are used
- Short-circuit protection
- Optional isolation capability
parameter
| |
UCC2889 |
|
| topology |
Flyback |
|
| Control method |
Voltage mode |
|
| Duty cycle (max.) (%) |
55 |
|
| Frequency (max) (khertz) |
250 |
|
| On/Off of Undervoltage Lockout Threshold (5) |
8.4/6.3 |
|
| Pins/Packets |
8PDIP，8SOIC |
|
| (#) Regulated output |
One |
|
| Operating temperature range(°C) |
-40 to 85 |
|
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