UC3845N
Controller PWM, 25V-12V supply, 450 kHz, 13.5V/1A out, DIP-8
| Manufacturer | TEXAS INSTRUMENTS |
|---|---|
| Manufacturer Part No | UC3845NCopy |
| Manufacturer Standard Lead Time | 16 weeks |
| Order Code | 3123562 |
| Your Part Number |
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| Quantity | Price |
|---|---|
| 1+ | NT$78.260 |
| 10+ | NT$57.890 |
| 50+ | NT$51.100 |
| 100+ | NT$46.890 |
| 250+ | NT$44.300 |
| 500+ | NT$42.690 |
| 1000+ | NT$41.400 |
| 2500+ | NT$40.100 |
Product Information
| Manufacturer | TEXAS INSTRUMENTS |
|---|---|
| Manufacturer Part No | UC3845NCopy |
| Manufacturer Standard Lead Time | 16 weeks |
| Order Code | 3123562 |
| Power Supply Controller Type | Single Ended Controller |
| No. of Channels | 1Channels |
| Control Mode | Current Mode Control |
| Supply Voltage Min | 12V |
| Supply Voltage Max | 25V |
| IC Case / Package | DIP |
| No. of Pins | 8Pins |
| IC Mounting | Through Hole |
| Switching Frequency Typ | - |
| Switching Frequency Min | - |
| Switching Frequency Max | 500kHz |
| Duty Cycle Min | 0% |
| Duty Cycle Max | 50% |
| Topology | Flyback, Forward |
| Operating Temperature Min | 0°C |
| Operating Temperature Max | 70°C |
| Product Range | - |
| Qualification | - |
| MSL | - |
| SVHC | No SVHC (27-Jun-2018) |
| Automotive Qualification Standard | - |
| Controller IC Case Style | DIP |
| Frequency | 450kHz |
| Input Voltage | 25V |
| Output Current | 1A |
| Output Voltage | 13.5V |
Product Overview
The UC3845N is a Current Mode PWM Controller optimized for off-line and DC to DC converters. This device provides the necessary features to implement off-line or DC-to-DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-channel MOSFETs, is low in the off state.
- Optimized for off-line and DC to DC converters
- Low start up current (<lt/>1mA)
- Automatic feed forward compensation
- Pulse-by-pulse current limiting
- Enhanced load response characteristics
- Under-voltage lockout with hysteresis
- Double pulse suppression
- High current totem pole output
- Internally trimmed bandgap reference
- Green product and no Sb/Br
Applications
Power Management
Technical Specifications
| Power Supply Controller Type | Single Ended Controller |
|---|---|
| Control Mode | Current Mode Control |
| Supply Voltage Max | 25V |
| No. of Pins | 8Pins |
| Switching Frequency Typ | - |
| Switching Frequency Max | 500kHz |
| Duty Cycle Max | 50% |
| Operating Temperature Min | 0°C |
| Product Range | - |
| MSL | - |
| Automotive Qualification Standard | - |
| Frequency | 450kHz |
| Output Current | 1A |
| No. of Channels | 1Channels |
|---|---|
| Supply Voltage Min | 12V |
| IC Case / Package | DIP |
| IC Mounting | Through Hole |
| Switching Frequency Min | - |
| Duty Cycle Min | 0% |
| Topology | Flyback, Forward |
| Operating Temperature Max | 70°C |
| Qualification | - |
| SVHC | No SVHC (27-Jun-2018) |
| Controller IC Case Style | DIP |
| Input Voltage | 25V |
| Output Voltage | 13.5V |
Technical Docs (1)
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Legislation and Environmental
| Country of Origin: Country in which last significant manufacturing process was carried outCountry of Origin: | Malaysia Country in which last significant manufacturing process was carried out |
|---|---|
| Tariff No: | 85423990 |
| US ECCN: | EAR99 |
| EU ECCN: | NLR |
| RoHS Compliant: | Yes RoHS |
| RoHS Phthalates Compliant: | Yes RoHS |
| SVHC: | No SVHC (27-Jun-2018) |
| Download Product Compliance Certificate | Product Compliance Certificate |
| Weight (kg): | .000907 |