UC1843 Series
PWM Controller flyback or forward - Low start-up current (0.5mA max.) 500KHz op
Manufacturer: Texas Instruments
Catalog(5 parts)
| Part | Utilized IC / Part | Main Purpose | Voltage - Output▲▼ | Frequency - Switching▲▼ | Voltage - Input▲▼ | Voltage - Input▲▼ | Current - Output▲▼ | Board Type | Supplied Contents | Regulator Topology | Outputs and Type | Outputs and Type▲▼ | Current - Supply▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Mounting Type | Voltage - Supply▲▼ | Voltage - Supply▲▼ | Supplier Device Package | Applications | Package / Case | Package / Case▲▼ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
UC1843B-SP | DC/DC, Step Down | 5 V | 200000 Hz | 20 V | 40 V | 10 A | Fully Populated | Board(s) | Flyback | Isolated | 1 ul | |||||||||||
-3 V | 6.300000190734863 V | 0.010999999940395355 A | -55 °C | 125 °C | Surface Mount | 30 V | 7.599999904632568 V | Die | PWM Controller | Die | ||||||||||||
Surface Mount | 25 V | 7.599999904632568 V | Die | PWM Controller | Die | |||||||||||||||||
-3 V | 6.300000190734863 V | 0.010999999940395355 A | -55 °C | 125 °C | Surface Mount | 30 V | 7.900000095367432 V | 8-SOIC | PWM Controller | 8-SOIC | 0.003899999894201755 m | |||||||||||
-3 V | 6.300000190734863 V | 0.010999999940395355 A | -55 °C | 125 °C | Surface Mount | 30 V | 7.900000095367432 V | 8-SOIC | PWM Controller | 8-SOIC | 0.003899999894201755 m |
Key Features
• * Optimized For Off-Line Control
• * Low Start-Up Current (<1mA)
• * Automatic Feed Forward Compensation
• * Trimmed Oscillator Discharge Current
• * Pulse-By-Pulse Current Limiting
• * Enhanced Load Response Characteristics -
• * Double-Pulse Suppression
• * High-Current Totem-Pole Output (1A Peak)
• * Internally Trimmed Band-gap Reference
• * 500kHz Operation Under-voltage Lockout: SG1843 - 8.4 volts
• * Low Shoot-Through Current <75mA Over Temperature
Description
AI
Control ICs provides all the necessary features to implement off-line fixed-frequency, current-mode switching power supplies with a minimum of external components. The current mode architecture demonstrates improved load regulation, pulse-by- pulse current limiting and inherent protection of the power supply output switch