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Technical Specifications
Parameters and characteristics for this part
| Specification | UC3843DR-8 |
|---|---|
| Clock Sync | False |
| Control Features | Frequency Control |
| Duty Cycle (Max) [Max] | 97 % |
| Function | Step-Up, Step-Up/Step-Down, Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 70 °C |
| Operating Temperature [Min] | 0 °C |
| Output Configuration | Positive, Isolation Capable |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 8-SOIC |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| Supplier Device Package | 8-SOIC |
| Synchronous Rectifier | False |
| Topology | Flyback, Buck-Boost, Forward, Boost, Buck |
UC3843A Series
30-V, 1A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle 0°C to 70°C
| Part | Applications | Current - Supply | Package / Case [x] | Package / Case [y] | Package / Case | Operating Temperature [Max] | Operating Temperature [Min] | Voltage - Supply [Max] | Voltage - Supply [Min] | Mounting Type | Voltage - Input [Min] | Voltage - Input [Max] | Supplier Device Package | Package / Case | Package / Case | Duty Cycle (Max) [Max] | Number of Outputs | Synchronous Rectifier | Output Configuration | Topology | Output Type | Output Phases | Clock Sync | Function | Control Features |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Texas Instruments | PWM Controller | 11 mA | 0.154 in | 3.9 mm | 14-SOIC | 70 °C | 0 °C | 30 VDC | 7.6 V | Surface Mount | -3 V | 6.3 V | |||||||||||||
 Texas Instruments | PWM Controller | 11 mA | 0.154 in | 3.9 mm | 8-SOIC | 70 °C | 0 °C | 28 V | 12 V | Surface Mount | -3 V | 6.3 V | 8-SOIC | ||||||||||||
 Texas Instruments | PWM Controller | 11 mA | 8-DIP | 70 °C | 0 °C | 28 V | 12 V | Through Hole | -3 V | 6.3 V | 8-PDIP | 0.3 in | 7.62 mm | ||||||||||||
Texas Instruments | PWM Controller | 11 mA | 0.154 in | 3.9 mm | 14-SOIC | 70 °C | 0 °C | 30 VDC | 7.6 V | Surface Mount | -3 V | 6.3 V | |||||||||||||
 Texas Instruments | 0.154 in | 3.9 mm | 14-SOIC | 70 °C | 0 °C | Surface Mount | |||||||||||||||||||
Texas Instruments | 0.154 in | 3.9 mm | 8-SOIC | 70 °C | 0 °C | Surface Mount | 8-SOIC | 97 % | 1 | Isolation Capable Positive | Boost Buck Buck-Boost Flyback Forward | Transistor Driver | 1 | Step-Down Step-Up Step-Up/Step-Down | Frequency Control | ||||||||||
 Texas Instruments | PWM Controller | 11 mA | 8-DIP | 70 °C | 0 °C | 30 VDC | 7.6 V | Through Hole | -3 V | 6.3 V | 8-PDIP | 0.3 in | 7.62 mm | ||||||||||||
 Texas Instruments | PWM Controller | 11 mA | 0.154 in | 3.9 mm | 8-SOIC | 70 °C | 0 °C | 30 VDC | 7.6 V | Surface Mount | -3 V | 6.3 V | 8-SOIC | ||||||||||||
Texas Instruments | PWM Controller | 11 mA | 0.154 in | 3.9 mm | 8-SOIC | 70 °C | 0 °C | 28 V | 12 V | Surface Mount | -3 V | 6.3 V | 8-SOIC | ||||||||||||
Texas Instruments | PWM Controller | 11 mA | 0.154 in | 3.9 mm | 8-SOIC | 70 °C | 0 °C | 30 VDC | 7.6 V | Surface Mount | -3 V | 6.3 V | 8-SOIC |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Bulk | 485 | $ 0.62 | |
Description
General part information
UC3843A Series
The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.
The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.
Documents
Technical documentation and resources
No documents available