Texas Instruments UC3843AN

Name: UC3843AN
Brand: Texas Instruments
SKU: 3291594-UC3843AN
Availability: InStock
Rating: 5 (1 reviews)

Part Number:: UC3843AN

Manufacturer:: Texas Instruments

Ventron No:: 3291594-UC3843AN

Description:: 30-V, 1A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle 0°C to 70°C

ECAD Model:

Datasheet:: uc3843a

Specifications

Texas Instruments UC3843AN technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments UC3843AN.

Topology
Boost
Control mode
Current
Duty cycle (max) (%)
100
Switching frequency (max) (kHz)
500
Features
Adjustable switching frequency
UVLO thresholds on/off (V)
8.4/7.6
Operating temperature range (°C)
0 to 70
Rating
Catalog
Gate drive (typ) (A)
1
Vin (max) (V)
28

Description

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 0.5 mA, oscillator discharge is trimmed to 8.3 mA, and during UVLO, the output stage can sink at least 10 mA at less than 1.2 V for V_CC over 5 V.

UC3843AN More Descriptions

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8
ADVANCED PWM CONTROLLER, 3843, DIP8; Controller Type:PWM; Voltage, Input Max:25V; Output Current Max:4A; Output Type:Totem Pole; Input Current:11mA; Output Energy per Cycle:5µJ; Frequency:500kHz; Power Dissipation:1W; Voltage, Supply
The UC3823A and UC3823B and the UC3825A andUC3825B family of PWM controllers are improved versions of the standard UC3823 and UC3825 family. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth productis 12 MHz, while input offset voltage is 2 mV. Current limit threshold is assured to a tolerance of 5%. Oscillator discharge current is specified at 10 mA for accurate dead time control. Frequency accuracy is improved to 6%. Startup supply current, typically 100 t,A, is ideal for off-line applications. The output drivers are redesigned to actively sink current during UVLO at no expense to the startup current specification. In addition each output is capable of2-A peak currents during transitions.

Certification