Key facts
- Brand
- Texas Instruments
- Model
- UC3825B
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-08
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TEXAS INSTRUMENTS UC1823A UC2823A UC2823B UC3823A UC3823B UC1825A UC2825A UC2825B UC3825A UC3825B handbook(1)
The document describes the UC3823A/B and UC3825A/B families of PWM controllers, which are improved versions of the standard UC3823 and UC3825. These devices support both voltage-mode and current-mode control methods with practical operation up to 1 MHz switching frequencies. Key features include a high-current dual totem pole output capable of 2-A peak currents, pulse-by-pulse current limiting, and latched overcurrent protection.
Read onlineTexas Instruments UC3825B specifications
| Switching Frequency | to 1 MHz |
|---|---|
| Propagation Delay | 50 ns |
| Output Current (Peak) | 2 A |
| Error Amplifier Gain Bandwidth Product | 12 MHz |
| Input Offset Voltage | 2 mV |
| Current Limit Threshold Tolerance | 5% |
| Oscillator Discharge Current | 10 mA |
All Texas Instruments UC3825B documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What are the UVLO thresholds for the 'B' versions?
The 'B' versions have UVLO thresholds of 16 V and 10 V, intended for ease of use in off-line applications.
What is the maximum duty cycle for UC3825A/B?
The UC3825A and UC3825B have dual alternating outputs with a duty cycle from zero to less than 100%.
What is the maximum switching frequency?
The device supports practical operation at switching frequencies up to 1 MHz.
Is there a restart delay after an overcurrent fault?
Yes, the latched overcurrent comparator includes a full cycle restart with a delay.