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ONSEMI UC3844BD1G High-Performance PWM Controller
The UC3844BD1G is a high-performance fixed-frequency current-mode PWM controller designed for off-line and DC-DC converter applications. It offers a cost-effective solution with minimal external components, featuring an oscillator, temperature-compensated reference, high-gain error amplifier, current sensing comparator, and a high-current totem pole output suitable for driving power MOSFETs. The device includes protective features such as input and reference undervoltage lockouts with hysteresis, cycle-by-cycle current limiting, a latch for single pulse metering, and a flip-flop that blanks the output on alternating oscillator cycles to set output deadtimes between 50% and 70%. Additional features include a precisely trimmed oscillator for frequency control, automatic feedforward compensation, internally trimmed reference, low startup and operating current, and integrated undervoltage lockout with hysteresis. It is commonly used in power management and industrial applications.
ONSEMI UC3844BD1G High-Performance PWM Controller Specifications:
- Oscillator Frequency: Guaranteed at 250 kHz
- Output Deadtime: Programmable from 50% to 70%
- Reference Voltage: 5.0 V thermostable, ±1% trimming
- UVLO Thresholds: 16V on, 10V off (UC3844B), 8.5V on, 7.6V off (UC3845B)
- Input Voltage Range: Up to 36V (UC3844B), appropriate for off-line applications
- Peak Output Drive Current: Up to 1.0 A with totem pole stage
- Device Package: SOIC-14 plastic surface-mount, with separate power and ground pins
- Thermal Rating: Max junction temperature +150°C; Power Dissipation: 862 mW (SOIC-14)
- Power Supply Range: 10V to 36V, RoHS compliant, Pb-Free
- Features include cycle-by-cycle current limiting, internal references, error amplifier with 90 dB gain, hysteresis in UVLO, and externally programmable deadtime
- Designed for power regulation, industrial automation, and power supply systems
Buy the ON Semiconductor Series UC3844 PWM: UC3844BD1G
Purchase the ON Semiconductor UC3844BD1G online today—designed for efficient power management, featuring adjustable deadtimes, undervoltage lockout, cycle-by-cycle current limiting, and minimal external components. Perfect for off-line power supplies and DC-DC converters, this reliable device offers high-speed operation at 250 kHz, integrated error amplifier, and robust protection features. Whether you are upgrading existing systems or designing new power modules, the UC3844BD1G ensures precise control, stability, and energy efficiency. Buy now and benefit from fast delivery and OEM-grade quality for your industrial, automotive, or electronics projects, ensuring long-term performance and reliability.
Get ON Semiconductor UC3844BD1G today—built for precision and long-lasting durability in power control systems.
Frequently Asked Questions
Where can I buy ONSEMI UC3844BD1G?
You can click on the BUY or RFQ button to purchase UC3844BD1G from an authorized ONSEMI distributor.
How do I troubleshoot issues or seek technical support for part UC3844BD1G?
You can download the UC3844BD1G datasheet or visit the ONSEMI website for support.
Who is the manufacturer of UC3844BD1G?
ONSEMI