The high-speed, low-power integrated circuit contains all the control and driver components and minimum number of components required for the UCC1800/1/2/3/4/5 family for off-line and DC fixed frequency current mode switching power supplies.
These devices have the same pin configuration as the UC1842/3/4/5 series, and also offer internal full-cycle soft-start and internal leading-edge current-sense input blanking value-added features.
The UCC1800/1/2/3/4/5 series offers packages, temperature range options, maximum duty cycle options, and a choice of key voltage levels. For example, UCC1803 works best with UCC1805 under reference parts to battery-powered systems, while higher reference and UCC1802 and UCC1804 higher UVLO hysteresis are ideal for using these in offline power sources.
characteristic
- Typical start-up supply current of 100μA
- Typical operating current is 500μA
- to 1 MHz operation
- Internal soft start
- Internal soft-start failure
- Built-in leading-edge blanking current sense signal
- 1 amp totem pole output
- The typical response of the 70NS ball valve is from current detection to gate drive output
- 1.5% tolerance voltage reference
- The same pins are UC3842 and UC3842A
parameter
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UCC3803 |
| topology |
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Boost, buck, reverse, forward |
| Control method |
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Current mode |
| Duty cycle (max.) (%) |
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100 |
| Frequency (max) (khertz) |
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1000 |
| On/Off of Undervoltage Lockout Threshold (5) |
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4.1/3.6 |
| Pins/Packets |
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8PDIP，8SOIC，8TSSOP |
| (#) Regulated output |
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One |
| Operating temperature range(°C) |
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0 to 70 |