Image is for your reference only,please check specifications for details

Updated at 01/11/2025 10:30:15(UTC+8)

Certifications

ManyChip is committed to product quality and safety with ISO 9001, ISO 13485, ISO 45001, UL, RoHS, CQC and REACH certifications.

Description

High Performance Current Mode Controllers
The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and dc−dc converter applications offering the designer a cost−effective solution with minimal external components. These integrated circuits feature an oscillator, a temperaturecompensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.
Features
•Trimmed Oscillator for Precise Frequency Control
•Oscillator Frequency Guaranteed at 250 kHz
•Current Mode Operation to 500 kHz Output Switching Frequency
•Output Deadtime Adjustable from 50% to 70%
•Automatic Feed Forward Compensation
•Latching PWM for Cycle−By−Cycle Current Limiting
•Internally Trimmed Reference with Undervoltage Lockout
•High Current Totem Pole Output
•Undervoltage Lockout with Hysteresis
•Low Startup and Operating Current
•These Devices are Pb−Free and are RoHS Compliant
•NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable

Show

UC3844BD1R2G Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Surface Mount
Number of Pins	8 Pin
Case/Package	SOIC-8
Frequency	52 kHz
Halogen Free Status	Halogen Free
Number of Outputs	1 Output
Input Voltage (DC)	30.0 V
Output Voltage	5 V
Output Current	1 A
Supply Current	12 mA
Number of Positions	8 Position
Power Dissipation	702 mW
Rise Time	50 ns
Switching Frequency	500 kHz
Topology	Flyback, Forward, Step-Up, Step-Down
Thermal Resistance	178 ℃/W
Duty Cycle	48 %
Maximum Duty Cycle	48 %
Fall Time	50 ns
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	0 ℃
Power Dissipation (Max)	702 mW
Supply Voltage	10V ~ 30V
Supply Voltage (Max)	36 V
Supply Voltage (Min)	14 V
	Show
Operating Temperature	0℃ ~ 70℃ (TA)
Product Lifecycle Status	Active
Packaging	Tape & Reel (TR)
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
ECCN Code	EAR99

TT in advance (bank transfer), Western Union, Credit card,
PayPal. Customer is responsible for shipping fee, bank
charges, duties and taxes.
- You can choose whether shipping charges will be charged through your shipping account or by us.
- Please confirm with the logistics company in advance for remote areas.
(Additional charges ($35-$50) may apply for delivery in these areas)
- Delivery date: usually 2 to 7 working days.
- A tracking number will be sent after your order ships.
- Carefully inspected and packed by ManyChip warehouse
- Vacuum packaging
- Anti-static packaging
- Shockproof foam
The terms here are for reference only, the actual terms are subject to the sales quotation.
- Please confirm product specifications when ordering.
- MOQ refers to the minimum order quantity required to purchase each part.
- If you have special ordering instructions, please indicate them on the ordering page.
- Inspection (PSI) will be performed prior to shipment.
- Income Quality Control (IQC), 1000+ qualified dealers.
- Chips are tested by authoritative organizations to ensure the quality, authenticity and safety of your device.
- Decapsulation control
- X-ray control
- XRF inspection
- Electrical testing
- Surface testing
-Digital components warehouse, covering an area of 800 square meters, with constant temperature and humidity

If you have any problem,please email to sales@manychip.com, we will response as soon as possisble.

SN:H5.96809LO60413V38Q0QC0S0

Please fill the information below to send RFQ quickly,and we will respond immediately.