- RS Stock No.:
- 922-3451
- Mfr. Part No.:
- UC3843AD8
- Brand:
- Texas Instruments
225 In stock - FREE next working day delivery available
Added
Price Each (In a Tube of 75)
£0.756
(exc. VAT)
£0.907
(inc. VAT)
| Units | Per unit | Per Tube* |
| 75 - 75 | £0.756 | £56.70 |
| 150 - 300 | £0.68 | £51.00 |
| 375 - 675 | £0.643 | £48.225 |
| 750 - 1050 | £0.605 | £45.375 |
| 1125 + | £0.529 | £39.675 |
| *price indicative | ||
- RS Stock No.:
- 922-3451
- Mfr. Part No.:
- UC3843AD8
- Brand:
- Texas Instruments
Legislation and Compliance
Product Details
Flyback Controller, Current Control, UC18/UC28/UC38 Series, Texas Instruments
The isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation to improve transient response to large load steps. Primary-Side Regulation (PSR) eliminates the need for an Optocoupler.
The Texas Instruments UC3843A family of control devices is a pin-for-pin compatible improved version of theUCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: start-up current is less than 0.5 mA, oscillator discharge is trimmed to 8.3 mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2 V for VCC over 5 V.
Optimized for Off-Line and DC-DC Converters
Low Start-Up Current (< 0.5 mA)
Trimmed Oscillator Discharge Current
Automatic Feedforward 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
Up to 500-kHz Operation
Low Start-Up Current (< 0.5 mA)
Trimmed Oscillator Discharge Current
Automatic Feedforward 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
Up to 500-kHz Operation
Flyback Controllers, Texas Instruments
Current-Mode and Voltage-Mode PWM Controller
Primary-Side Regulation
Peak Power Mode
Low Power
Primary-Side Regulation
Peak Power Mode
Low Power
Specifications
Attribute | Value |
|---|---|
| Maximum Switching Frequency | 500 kHz |
| Output Current | 1 A |
| Control Method | Current |
| Number of Outputs | 1 |
| Fall Time | 50ns |
| Mounting Type | Surface Mount |
| Rise Time | 50ns |
| Package Type | SOIC |
| Topology | Boost, Buck, Flyback, Forward |
| Pin Count | 8 |
| Dimensions | 4.9 x 3.91 x 1.58mm |
| Maximum Duty Cycle | 100% |
| Length | 4.9mm |
| PWM Controller Type | Current Mode |
| Width | 3.91mm |
| Height | 1.58mm |
| Maximum Operating Temperature | +70 °C |
| Minimum Operating Temperature | 0 °C |