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Technical Specifications
Parameters and characteristics for this part
| Specification | UC3846DWTRG4 |
|---|---|
| Clock Sync | True |
| Control Features | Enable, Soft Start, Frequency Control, Current Limit |
| Duty Cycle (Max) [Max] | 50 % |
| Frequency - Switching | 500 kHz |
| Function | Step-Up, Step-Up/Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 2 |
| Operating Temperature [Max] | 70 °C |
| Operating Temperature [Min] | 0 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 16-SOIC |
| Package / Case [x] | 0.295 in |
| Package / Case [y] | 7.5 mm |
| Supplier Device Package | 16-SOIC |
| Synchronous Rectifier | True |
| Topology | Forward Converter, Half-Bridge, Push-Pull, Flyback, Boost |
| Voltage - Supply (Vcc/Vdd) [Max] | 40 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 6.95 V |
UC3846 Series
Dual ended 500KHz current mode PWM controller, 0C to 70C
| Part | Supplier Device Package | Frequency - Switching | Topology | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] | Control Features | Mounting Type | Output Phases | Number of Outputs | Output Configuration | Package / Case [x] | Package / Case | Package / Case [y] | Output Type | Synchronous Rectifier | Clock Sync | Duty Cycle (Max) [Max] | Operating Temperature [Max] | Operating Temperature [Min] | Function | Package / Case | Package / Case | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments | 16-SOIC | 500 kHz | Boost Flyback Forward Converter Half-Bridge Push-Pull | 6.95 V | 40 V | Current Limit Enable Frequency Control Soft Start | Surface Mount | 1 | 2 | Positive | 0.295 in | 16-SOIC | 7.5 mm | Transistor Driver | 50 % | 70 °C | 0 °C | Step-Up Step-Up/Step-Down | |||||
 Texas Instruments | 20-PLCC (9x9) | 500 kHz | Boost Flyback Forward Converter Half-Bridge Push-Pull | 6.95 V | 40 V | Current Limit Enable Frequency Control Soft Start | Surface Mount | 1 | 2 | Positive | 20-LCC (J-Lead) | Transistor Driver | 50 % | 70 °C | 0 °C | Step-Up Step-Up/Step-Down | |||||||
Texas Instruments | 16-SOIC | 500 kHz | Boost Flyback Forward Converter Half-Bridge Push-Pull | 6.95 V | 40 V | Current Limit Enable Frequency Control Soft Start | Surface Mount | 1 | 2 | Positive | 0.295 in | 16-SOIC | 7.5 mm | Transistor Driver | 50 % | 70 °C | 0 °C | Step-Up Step-Up/Step-Down | |||||
 Texas Instruments | 16-PDIP | 500 kHz | Boost Flyback Forward Converter Half-Bridge Push-Pull | 6.95 V | 40 V | Current Limit Enable Frequency Control Soft Start | Through Hole | 1 | 2 | Positive | 16-DIP | Transistor Driver | 50 % | 70 °C | 0 °C | Step-Up Step-Up/Step-Down | 0.3 in | 7.62 mm | |||||
Texas Instruments | 16-SOIC | 500 kHz | Boost Flyback Forward Converter Half-Bridge Push-Pull | 6.95 V | 40 V | Current Limit Enable Frequency Control Soft Start | Surface Mount | 1 | 2 | Positive | 0.295 in | 16-SOIC | 7.5 mm | Transistor Driver | 50 % | 70 °C | 0 °C | Step-Up Step-Up/Step-Down | |||||
 Texas Instruments | 16-CDIP | 500 kHz | Boost Flyback Forward Converter Half-Bridge Push-Pull | 6.95 V | 40 V | Current Limit Enable Frequency Control Soft Start | Through Hole | 1 | 2 | Positive | 16-CDIP | Transistor Driver | 50 % | 70 °C | 0 °C | Step-Up Step-Up/Step-Down | 0.3 in 7.62 mm |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 2000 | $ 1.87 | |
| 4000 | $ 1.83 | |||
Description
General part information
UC3846 Series
The UC1846/7 family of control devices provides all of the necessary features to implement fixed-frequency, current-mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel while maintaining equal current sharing. \
Protection circuitry includes built-in undervoltage lockout and programmable current limit, in addition to soft-start capability. A shutdown function is also available, which can initiate either a complete shutdown with automatic restart or latch the supply off.
Other features include fully-latched operation, double-pulse suppression, deadline adjust capability, and a ±1% trimmed band gap reference.
Documents
Technical documentation and resources