Texas Instruments UC3843AD8, PWM Controller, 500 kHz 8-Pin, SOIC
- RS Stock No.:
- 661-5333P
- Mfr. Part No.:
- UC3843AD8
- Brand:
- Texas Instruments
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Subtotal 125 units (supplied in a tube)*
£74.50
(exc. VAT)
£89.375
(inc. VAT)
FREE delivery for orders over £50.00
In Stock
- Plus 125 unit(s) shipping from 27 October 2025
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Units | Per unit |
|---|---|
| 125 - 495 | £0.596 |
| 500 - 1245 | £0.514 |
| 1250 - 2495 | £0.50 |
| 2500 + | £0.488 |
*price indicative
- RS Stock No.:
- 661-5333P
- Mfr. Part No.:
- UC3843AD8
- Brand:
- Texas Instruments
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Texas Instruments | |
| Maximum Switching Frequency | 500 kHz | |
| Output Current | 1 A | |
| Number of Outputs | 1 | |
| Control Method | Current | |
| Mounting Type | Surface Mount | |
| Fall Time | 50ns | |
| Rise Time | 50ns | |
| Package Type | SOIC | |
| Topology | Boost, Buck, Flyback, Forward | |
| Pin Count | 8 | |
| Maximum Duty Cycle | 100% | |
| Dimensions | 4.9 x 3.91 x 1.58mm | |
| Length | 4.9mm | |
| PWM Controller Type | Current Mode | |
| Width | 3.91mm | |
| Height | 1.58mm | |
| Maximum Operating Temperature | +70 °C | |
| Minimum Operating Temperature | 0 °C | |
Select all | ||
|---|---|---|
Brand Texas Instruments | ||
Maximum Switching Frequency 500 kHz | ||
Output Current 1 A | ||
Number of Outputs 1 | ||
Control Method Current | ||
Mounting Type Surface Mount | ||
Fall Time 50ns | ||
Rise Time 50ns | ||
Package Type SOIC | ||
Topology Boost, Buck, Flyback, Forward | ||
Pin Count 8 | ||
Maximum Duty Cycle 100% | ||
Dimensions 4.9 x 3.91 x 1.58mm | ||
Length 4.9mm | ||
PWM Controller Type Current Mode | ||
Width 3.91mm | ||
Height 1.58mm | ||
Maximum Operating Temperature +70 °C | ||
Minimum Operating Temperature 0 °C | ||
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