Texas Instruments UC3843AD8, PWM Controller, 500 kHz 8-Pin, SOIC

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Subtotal 125 units (supplied in a tube)*

£74.50

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£89.375

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Packaging Options:
RS Stock No.:
661-5333P
Mfr. Part No.:
UC3843AD8
Brand:
Texas Instruments
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Brand

Texas Instruments

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%

PWM Controller Type

Current Mode

Length

4.9mm

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


Flyback Controllers, Texas Instruments


Current-Mode and Voltage-Mode PWM Controller
Primary-Side Regulation
Peak Power Mode
Low Power