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UC2827-2
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Category:ACDC- and -DCDC-power supply
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Product Name:Current-down/voltage-feed push-pull PWM controller
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Manufacturers:TI
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Production Batch Number:10+
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Encapsulation:24SOIC
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Stock Status:There is stock
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Stock Quantity:6000
- Minimum order quantity: 1
- Details:
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The controller's UC3827 series provides an integrated control solution for cascaded buck and push-pull converters. Known as incumbent Fed or voltage Fed push-pull converters, these converters are ideal for multiple output and/or high voltage output applications. In both Fed current Fed and voltage mode, the push-pull switch is driven at 50% rated duty cycle and half the switching frequency of the buck stage. In the current Fed mode, two switches specify the time of the drive, in the circle, to prevent ringing and voltage stress on the device. Fed in voltage mode, driven between two switches, the switch specifies an interval of time to prevent short circuits across the transformer and capacitor from energy storage, prohibiting the flow of current through these devices.
characteristic
- Ideal for multiple-output and/or high-voltage output voltage converters
- Up to 500 kHz operation
- High voltage, high current buck converter stage floating drive
- UC3827-1 Current Fed controllers have push-pull drive overlapping conduction periods
- The UC3827-2 voltage feeder controller features a push-pull driver and a non-overlapping conduction period
- Average current mode, peak current mode, or input voltage feedforward voltage mode control the buck power stage
- Wide bandwidth, low offset, differential current sense amplifier
- Precise short-circuit current control
parameter
|
UC2827 - 2 |
|
topology |
Buck, full bridge, push-pull |
|
Control method |
Current mode |
|
Duty cycle (max.) (%) |
50 |
|
Frequency (max) (khertz) |
450 |
|
On/Off of Undervoltage Lockout Threshold (5) |
9/8.4 |
|
Pins/Packets |
24SOIC |
|
(#) Regulated output |
Three |
|
Operating temperature range(°C) |
-40 to 85 |
|
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