Technical Specifications
Parameters and characteristics for this part
| Specification | UC3843BVD1R2G |
|---|---|
| Clock Sync | False |
| Control Features | Frequency Control |
| Duty Cycle (Max) [Max] | 96 % |
| Function | Step-Up, Step-Up/Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 105 °C |
| Operating Temperature [Min] | -40 °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 | Boost, Flyback |
| Voltage - Supply (Vcc/Vdd) [Max] | 30 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 7.6 V |
UC3843B Series
High Performance Current Mode PWM Controller
| Part | Function | Operating Temperature [Max] | Operating Temperature [Min] | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] | Output Configuration | Duty Cycle (Max) [Max] | Clock Sync | Output Type | Topology | Synchronous Rectifier | Mounting Type | Number of Outputs | Control Features | Package / Case [x] | Package / Case [y] | Package / Case | Output Phases | Supplier Device Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ON Semiconductor | Step-Up Step-Up/Step-Down | 105 °C | -40 °C | 7.6 V | 30 V | Isolation Capable Positive | 96 % | Transistor Driver | Boost Flyback | Surface Mount | 1 | Frequency Control | 0.154 in | 3.9 mm | 14-SOIC | 1 | |||
ON Semiconductor | Step-Up Step-Up/Step-Down | 105 °C | -40 °C | 7.6 V | 30 V | Isolation Capable Positive | 96 % | Transistor Driver | Boost Flyback | Surface Mount | 1 | Frequency Control | 0.154 in | 3.9 mm | 14-SOIC | 1 | |||
ON Semiconductor | Step-Up Step-Up/Step-Down | 70 °C | 0 °C | 7.6 V | 30 V | Isolation Capable Positive | 96 % | Transistor Driver | Boost Flyback | Surface Mount | 1 | Frequency Control | 0.154 in | 3.9 mm | 14-SOIC | 1 | |||
ON Semiconductor | Step-Up Step-Up/Step-Down | 70 °C | 0 °C | 7.6 V | 30 V | Isolation Capable Positive | 96 % | Transistor Driver | Boost Flyback | Surface Mount | 1 | Frequency Control | 0.154 in | 3.9 mm | 8-SOIC | 1 | 8-SOIC | ||
ON Semiconductor | Step-Up Step-Up/Step-Down | 70 °C | 0 °C | 7.6 V | 30 V | Isolation Capable Positive | 96 % | Transistor Driver | Boost Flyback | Surface Mount | 1 | Frequency Control | 0.154 in | 3.9 mm | 8-SOIC | 1 | 8-SOIC | ||
ON Semiconductor | Step-Up Step-Up/Step-Down | 105 °C | -40 °C | 7.6 V | 30 V | Isolation Capable Positive | 96 % | Transistor Driver | Boost Flyback | Surface Mount | 1 | Frequency Control | 0.154 in | 3.9 mm | 8-SOIC | 1 | 8-SOIC | ||
ON Semiconductor | Step-Up Step-Up/Step-Down | 70 °C | 0 °C | 7.6 V | 30 V | Isolation Capable Positive | 96 % | Transistor Driver | Boost Flyback | Surface Mount | 1 | Frequency Control | 0.154 in | 3.9 mm | 8-SOIC | 1 | 8-SOIC | ||
ON Semiconductor | Step-Up Step-Up/Step-Down | 70 °C | 0 °C | 7.6 V | 30 V | Isolation Capable Positive | 96 % | Transistor Driver | Boost Flyback | Surface Mount | 1 | Frequency Control | 0.154 in | 3.9 mm | 8-SOIC | 1 | 8-SOIC | ||
ON Semiconductor | Step-Up Step-Up/Step-Down | 70 °C | 0 °C | 7.6 V | 30 V | Isolation Capable Positive | 97 % | Transistor Driver | Boost Flyback | Surface Mount | 1 | Frequency Control | 0.209 " | 5.3 mm | 14-SOIC | 1 | 14-SOP | ||
ON Semiconductor | Step-Up Step-Up/Step-Down | 70 °C | 0 °C | 7.6 V | 30 V | Isolation Capable Positive | 96 % | Transistor Driver | Boost Flyback | Surface Mount | 1 | Frequency Control | 0.154 in | 3.9 mm | 8-SOIC | 1 | 8-SOIC |
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 | 2500 | $ 0.27 | |
| 5000 | $ 0.26 | |||
| Digikey | Cut Tape (CT) | 1 | $ 1.18 | |
| 10 | $ 0.70 | |||
| 25 | $ 0.58 | |||
| 100 | $ 0.46 | |||
| 250 | $ 0.39 | |||
| 500 | $ 0.36 | |||
| 1000 | $ 0.33 | |||
| Digi-Reel® | 1 | $ 1.18 | ||
| 10 | $ 0.70 | |||
| 25 | $ 0.58 | |||
| 100 | $ 0.46 | |||
| 250 | $ 0.39 | |||
| 500 | $ 0.36 | |||
| 1000 | $ 0.33 | |||
| Tape & Reel (TR) | 2500 | $ 0.29 | ||
| 5000 | $ 0.27 | |||
| 7500 | $ 0.26 | |||
| 12500 | $ 0.25 | |||
| 17500 | $ 0.25 | |||
| 25000 | $ 0.24 | |||
| Newark | Each (Supplied on Cut Tape) | 1 | $ 0.90 | |
| 10 | $ 0.75 | |||
| 25 | $ 0.69 | |||
| 50 | $ 0.62 | |||
| 100 | $ 0.55 | |||
| 250 | $ 0.53 | |||
| 500 | $ 0.51 | |||
| ON Semiconductor | N/A | 1 | $ 0.26 | |
Description
General part information
UC3843B Series
The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for single pulse metering.These devices are available in an 8-pin dual-in-line and surface mount (SO-8) plastic package as well as the 14-pin plastic surface mount (SO-14). The SO-14 package has separate power and ground pins for the totem pole output stage.The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off-line converters. The UCX843B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
Documents
Technical documentation and resources