Leobot Electronics is your trusted supplier for Arduino, robotics, IoT components, and electronic modules in South Africa. We stock a wide range of high-quality sensors, microcontrollers, modules, cables, and prototyping tools—ready for fast, nationwide delivery. Whether you're a hobbyist, student, or engineer, we provide the essential electronics you need to build, learn, and innovate. In addition to product sales, we offer custom development services including embedded systems, IoT design, CAD modelling, and smart device integration.
Leobot Electronics South Africa - Electronic Component Supplier & Development Service Provider
Leobot Electronics Online Shop
R1.55
The UC3842A, UC3843A series of high performance fixed frequency current mode controllers 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 plastic package as well as the 14−pin plastic surface mount (SOIC−14). The SOIC−14 package has separate power and ground pins for the totem pole output stage. The UCX842A has UYLO thresholds of 16 V (on) and 10 V (off), ideally suited for off−line converters. The UCX843A is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
Datasheet available here:https://leobot.net/datasheets/UC3843AN.pdf
Manufacturer: Texas Instruments Product Category: Switching Controllers Topology: Boost, Buck, Flyback, Forward Number of Outputs: 1 Output Switching Frequency: 500 kHz Duty Cycle - Max: 100 % Input Voltage: 12 V to 28 V Output Voltage: 5 V Output Current: 200 mA Minimum Operating Temperature: 0 C Maximum Operating Temperature: + 70 C Mounting Style: Through Hole Package/Case: PDIP-8 Brand: Texas Instruments Fall Time: 50 ns Operating Supply Current: 25 mA Operating Supply Voltage: 12 V to 28 V Product Type: Switching Controllers Rise Time: 50 ns Series: UC3843A
Length: 10.00mmWidth: 5.00mmHeight: 5.00mm
Electric Kettle Thermostat Switch TM-XD-3 (100-240V 13A T125)
R28.00
TOP255PN Top Switch Offline (DIP-7)
R15.40
SN75441 IC (Quad HALF-H Driver DIP16)
R8.40
DS18S20 TO92 Digital Thermometer
R49.00
L7912CV (1.5A, 12V Fixed Output Voltage Regulator)
R11.20
TCRT5000L Infrared (IR) Reflective Optical Sensor
BT137-600E (TO220 Triac Sensitive Gate, 8A/600V)
L7806CV (1.5A, 6V Three Terminal Voltage Regulator )
R16.80
L7915CV (1.5A, 15V Fixed Output Voltage Regulator)
LM317LZ (Voltage Regulator 1.2V to 37V 100mA)
R1.06
UC3842AN (High Performance Current Mode Controller)
R1.65
MOC3041M (Triac Driver Output Optocoupler, 6-Pin DIP 400V Zero Crossing)
R4.46
DB107 Bridge Rectifier ( 1A,1000V,, 4-Pin DB)
R1.68
L7906CV (TO-220 6V Voltage Regulator, Negative)
UC3843AN (High Performance Fixed Frequency Current-Mode Controller)
Get notified when new stock arrives! Simply provide your email address:
Want more stock than we have on-hand? Let us import this product in bulk for you! Bulk Direct Import