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ONSEMI UC3842BD1G Current Mode Controller
The UC3842BD1G is a high-performance fixed frequency current mode controller designed for off-line and DC-DC converter applications. It features a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high-gain error amplifier, and a high-current totem pole output stage capable of driving power MOSFETs. Protective features include undervoltage lockout with hysteresis, cycle-by-cycle current limiting, programmable deadtime, and a latch for single pulse metering. Available in SOIC-8 and SOIC-14 packages, it is suitable for efficient and reliable switching power supplies with minimal external components.
ONSEMI UC3842BD1G Current Mode Controller Specifications:
- Oscillator Frequency: 250 kHz guaranteed
- Maximum Output Duty Cycle: Adjustable via resistor Ry
- Peak Drive Current: 1.0 A
- Input Voltage Range: Vcc from 8.4 V to 16 V for UCX843B, and up to 30 V for UCX842B
- Reference Output Voltage: 5.0 V with ±1% or ±2% tolerance
- Undervoltage Lockout Thresholds: 16 V on and 10 V off (UCX842B), 8.4 V on and 7.6 V off (UCX843B)
- Package Types: SOIC-8, SOIC-14
- Maximum Power Dissipation: 862 mW (SOIC-14), 702 mW (SOIC-8)
- Operating Temperature Range: -25°C to +105°C depending on variant
- Thermal Resistance: 145°C/W (Soic-14), 178°C/W (SOIC-8)
- Power Supply Voltage: up to 30 V
- Error Amplifier Gain: 90 dB, bandwidth 1.0 MHz
- Inputs: Voltage feedback, current sense, and reference
- Outputs: High current driver for MOSFETs
- Protection: Undervoltage lockout with hysteresis, cycle-by-cycle current limit, soft-start features
Buy the Buy ON Semiconductor UC3842BD1G Part Number UC3842BD1G Online
Order the ON Semiconductor UC3842BD1G today for high-performance current mode control in power conversion systems. Designed for reliable operation, it features a precise oscillator, integrated undervoltage lockout, high current drive capability, and minimal external components. Suitable for off-line and DC-DC converters, this controller ensures efficient switch timing, cycle control, and protection for durable, high-efficiency power supplies. Purchase now for immediate integration into your electronic designs and enjoy robust performance and quality assurance.
Get ON Semiconductor UC3842BD1G today—built for precision and long-lasting durability in switching power supplies.
Frequently Asked Questions
Where can I buy ONSEMI UC3842BD1G?
You can click on the BUY or RFQ button to purchase UC3842BD1G from an authorized ONSEMI distributor.
How do I troubleshoot issues or seek technical support for part UC3842BD1G?
You can download the UC3842BD1G datasheet or visit the ONSEMI website for support.
Who is the manufacturer of UC3842BD1G?
ONSEMI