UC3856N
ActiveCURRENT MODE PWM CONTROLLER 1.5A 220KHZ 16-PIN PDIP TUBE
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UC3856N
ActiveCURRENT MODE PWM CONTROLLER 1.5A 220KHZ 16-PIN PDIP TUBE
Technical Specifications
Parameters and characteristics for this part
| Specification | UC3856N |
|---|---|
| Clock Sync | True |
| Control Features | Frequency Control, Enable, Soft Start |
| Duty Cycle (Max) [Max] | 47 % |
| Frequency - Switching | 200 kHz |
| Function | Step-Up, Step-Up/Step-Down, Step-Down |
| Mounting Type | Through Hole |
| 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 | 0.3 in |
| Package / Case | 16-DIP |
| Package / Case | 7.62 mm |
| Supplier Device Package | 16-PDIP |
| Synchronous Rectifier | True |
| Topology | Forward Converter, Flyback, Push-Pull, Half-Bridge, Full-Bridge, Boost, Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 40 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 7 V |
UC3856 Series
40V, 1.5A current mode 1MHz PWM controller , 0C to 70C
| Part | Control Features | Supplier Device Package | Output Phases | Package / Case | Synchronous Rectifier | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] | Duty Cycle (Max) [Max] | Operating Temperature [Max] | Operating Temperature [Min] | Frequency - Switching | Output Configuration | Output Type | Mounting Type | Topology | Number of Outputs | Function | Clock Sync | Package / Case | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments | Enable Frequency Control Soft Start | 20-PLCC (9x9) | 1 | 20-LCC (J-Lead) | 7 V | 40 V | 47 % | 70 °C | 0 °C | 200 kHz | Positive | Transistor Driver | Surface Mount | Boost Buck Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull | 2 | Step-Down Step-Up Step-Up/Step-Down | ||||
Texas Instruments | Enable Frequency Control Soft Start | 16-PDIP | 1 | 16-DIP | 7 V | 40 V | 47 % | 70 °C | 0 °C | 200 kHz | Positive | Transistor Driver | Through Hole | Boost Buck Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull | 2 | Step-Down Step-Up Step-Up/Step-Down | 0.3 in | 7.62 mm | ||
Texas Instruments | Enable Frequency Control Soft Start | 16-PDIP | 1 | 16-DIP | 7 V | 40 V | 47 % | 70 °C | 0 °C | 200 kHz | Positive | Transistor Driver | Through Hole | Boost Buck Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull | 2 | Step-Down Step-Up Step-Up/Step-Down | 0.3 in | 7.62 mm | ||
Texas Instruments | Enable Frequency Control Soft Start | 20-PLCC (9x9) | 1 | 20-LCC (J-Lead) | 7 V | 40 V | 47 % | 70 °C | 0 °C | 200 kHz | Positive | Transistor Driver | Surface Mount | Boost Buck Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull | 2 | Step-Down Step-Up Step-Up/Step-Down |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Arrow | N/A | 25 | $ 4.56 | |
| 100 | $ 4.32 | |||
| Digikey | Tube | 1 | $ 6.11 | |
| 10 | $ 5.52 | |||
| 25 | $ 5.26 | |||
| 100 | $ 4.57 | |||
| 250 | $ 4.36 | |||
| 500 | $ 3.98 | |||
| 1000 | $ 3.46 | |||
| 2500 | $ 3.34 | |||
| Texas Instruments | TUBE | 1 | $ 6.01 | |
| 100 | $ 4.90 | |||
| 250 | $ 3.85 | |||
| 1000 | $ 3.26 | |||
Description
General part information
UC3856 Series
The UC3856 is a high performance version of the popular UC3846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5A peak output stages have been added to allow rapid switching of power FETs.
A low impedance TTL compatible sync output has been implemented with a tri-state function when used as a sync input.
Internal chip grounding has been improved to minimize internal \x93noise\x94 caused when driving large capacitive loads. This, in conjunction with the improved differential current sense amplifier results in enhanced noise immunity.
Documents
Technical documentation and resources