Key facts
- Brand
- STMicroelectronics
- Model
- UC2842B
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-10
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ST UC2842B/3B /4B /5B UC3842B/3B /4B /5B handbook
The document describes the UC384xB family of control ICs designed to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Key features include a trimmed oscillator for precise duty cycle control, voltage lockout protection, a precision reference, and a high current totem pole output stage suitable for driving N-Channel MOSFETs.
The datasheet provides absolute maximum ratings, detailed electrical characteristics for both UC284XB and UC384XB variants, and pin function descriptions. It also includes various application circuits and graphs illustrating performance characteristics such as oscillator frequency vs. timing resistor, output dead-time, and error amplifier gain and phase.
STMicroelectronics UC2842B specifications
| Oscillator Frequency | 250kHz guaranteed at 250kHz, operation to 500kHz |
|---|---|
| Output Current | ±1 A |
| Output Energy | 5 µJ |
| Power Dissipation (Minidip) | 1.25 W |
| Power Dissipation (SO8) | 800 mW |
| Storage Temperature Range | - 65 to 150 °C |
| Junction Operating Temperature | - 40 to 150 °C |
| Reference Output Voltage | 5.00 V |
| Maximum Duty Cycle (UC2842B/3B) | 100% |
| Maximum Duty Cycle (UC2844B/5B) | 85% |
| Supply Current (Operating) | 12 mA |
All STMicroelectronics UC2842B documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the guaranteed oscillator frequency?
The oscillator frequency is guaranteed at 250kHz, with current mode operation possible up to 500kHz.
What is the output current capability?
The output stage can source or sink peak currents up to 1A.