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ONSEMI UC3845BDG Current Mode PWM Controller
The UC3845BDG 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 internal 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 every other oscillator cycle to enable programmable deadtimes from 50% to 70%. Key features include a Trimmed oscillator for precise frequency control, automatic feed-forward compensation, an internally trimmed reference with undervoltage lockout, high-current output stage, low startup and operating current, and integrated protective functions. It is suitable for power management and industrial applications.
ONSEMI UC3845BDG Current Mode PWM Controller Specifications:
- Oscillator Frequency: Guaranteed at 250 kHz
- Output Deadtime: Programmable from 50% to 70%
- Error Amplifier Gain: 90 dB
- Unity Gain Bandwidth: 1.0 MHz
- Reference Voltage: 5.0 V ±1%
- Undervoltage Lockout: 16V (on), 10V (off)
- Output Drive Current: Up to 1.0 A peak
- Maximum Power Dissipation: 862 mW (SOIC-14 package)
- Operating Temperature Range: -25°C to +105°C
- Package Types: SOIC-8, SOIC-14, PDIP-8
- Cycle-by-cycle current limiting and latch for single pulse control
- Protection features include undervoltage lockout with hysteresis and an internal shutdown flip-flop
- Designed for power electronic applications with minimal external components
- RoHS compliant, Pb-Free device
- Suitable for power management, industrial control, and DC-DC conversion
Buy the Buy ON Semiconductor UC3845BDG Part Number UC3845BDG Online
Purchase the ON Semiconductor UC3845BDG today and enhance your power supply designs with a high-performance PWM controller. Featuring a precise 250 kHz oscillator, programmable deadtimes from 50% to 70%, and protective undervoltage lockout thresholds, this device simplifies power converter designs. Its high-current totem-pole output stage ensures efficient MOSFET driving, while integrated cycle-by-cycle current limiting and a latch for single pulse operation improve safety and control. Ideal for industrial, power management, and DC-DC conversion applications, buy online to secure fast delivery and expert support.
Buy ON Semiconductor UC3845BDG now and experience unmatched reliability and performance with precise frequency control and advanced power management features.
Frequently Asked Questions
Where can I buy ONSEMI UC3845BDG?
You can click on the BUY or RFQ button to purchase UC3845BDG from an authorized ONSEMI distributor.
How do I troubleshoot issues or seek technical support for part UC3845BDG?
You can download the UC3845BDG datasheet or visit the ONSEMI website for support.
Who is the manufacturer of UC3845BDG?
ONSEMI