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UC3843BVD1G is listed in the DC DC Switching Controllers range at ChipApex. The manufacturer field lists onsemi. Its product description is IC REG CTRLR FLYBACK 8SOIC. Review the specifications below when checking this part for your BOM.
DC DC Switching Controllers specifications for UC3843BVD1G
- Description：IC REG CTRLR FLYBACK 8SOIC
- Series：-
- Mfr：onsemi
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Up, Step-Up/Step-Down
- Output Configuration：Positive, Isolation Capable
- Topology：Boost, Flyback
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：7.6V ~ 30V
- Frequency - Switching：Up to 500kHz
- Duty Cycle (Max)：96%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Frequency Control
- Operating Temperature：-40°C ~ 105°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
DC DC Switching Controllers datasheet and documents for UC3843BVD1G
DC DC Switching Controllers Overview
The UC3843BVD1G is a current-mode PWM controller from onsemi designed for offline and DC-DC converters. It operates in SOIC-8 surface-mount packages with a maximum switching frequency of 500 kHz. The device supports Boost, Flyback, and Forward topologies, delivering a peak output current of 1 A. It features a maximum duty cycle of 96% and an internal reference voltage range of 4.9 V to 5.1 V. Operating temperatures span from -40°C to +105°C, with a supply voltage up to 30 V.
DC DC Switching Controllers Feature Summary
- High-current图腾柱 output stage suitable for driving power MOSFETs
- Integrated temperature-compensated oscillator for precise frequency control
- Latched PWM architecture providing per-cycle current limiting protection
DC DC Switching Controllers Applications
- Offline power converter designs
- DC-DC step-up and isolated converter circuits
- Forward and flyback topology implementations
DC DC Switching Controllers Procurement Notes
Verify the specific suffix '1' against the official datasheet to confirm package dimensions and tape-and-reel specifications. Confirm RoHS compliance status directly with manufacturer documentation before integration. Ensure component availability aligns with project timelines due to potential supply chain variations.
DC DC Switching Controllers Selection Notes
Select this component for applications requiring fixed-frequency current-mode control with high peak drive capability. The UC3843B variant offers lower UVLO thresholds compared to UC3842 series, making it suitable for low-voltage input scenarios. Validate thermal performance within the specified operating temperature range during design.
DC DC Switching Controllers Part Context
This part belongs to the UC3843B family of current-mode controllers. It shares functional similarities with the UC3842B but differs in undervoltage lockout thresholds. The B-grade designation indicates improved performance characteristics over standard variants. It is a legacy component often used in established industrial power supply architectures.
DC DC Switching Controllers Replacement Considerations
Direct pin-compatible substitutes include UC3843BD1G and UC3843BVNG. Verify that replacement packages match the required mounting style (SOIC vs PDIP). Ensure electrical parameters such as UVLO thresholds and switching frequencies remain compatible with existing circuit designs.
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