UC2844BM/TR
Power Management
Technical Specifications
| Type | Description |
|---|---|
| Output Current | 1 A |
| Voltage - Breakdown | - |
| Duty Cycle(Max) | 50% |
| Feedback System | - |
| Working Mode | PWM Modulation |
| Operating Temperature | -40°C~+85°C |
| Switching Freq Hz | 100kHz~500kHz |
| Type | Description |
|---|---|
| Pd W | 0.85 W |
| Supply Voltage | 10V~28V |
| Features | Slope compensation;Under-voltage lockout;Over Current Protection;Under Voltage Protection |
| Topology | - |
| Output Voltage | - |
| Package / Case | SOP-8 |
Product Introduction
UC2844B is a high-performance fixed-frequency current-mode controller designed for isolated or DC-DC converter applications, offering designers a cost-effective solution with minimal external components. The circuit features an undervoltage lockout module with startup current less than 0.5mA, a precision reference voltage connected to the error amplifier input that is trimmed for high accuracy. Additional internal modules include logic circuitry for latched operation, current limiting, and a PWM comparator designed for high-current totem-pole output. This output stage is suitable for driving N-channel MOSFETs, with the output held low during shutdown.
Features
- Optimized for isolated or DC/DC converter applications
- Low startup current (<0.5mA)
- Automatic feed-forward compensation
- Cycle-by-cycle current limiting
- Enhanced load transient response
- Under-voltage protection with hysteresis
- Double-pulse suppression
- High-current totem-pole output
- Internal trimmed bandgap reference
- Operating frequency up to 500kHz
Applications
- Power converters
Datasheet
Compliance & Export Codes
| Type | Details |
|---|---|
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| CAHTS | 8542390000 |
| Type | Details |
|---|---|
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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