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UC2844BD1

Name: UC2844BD1
Brand: ST
SKU: JT24-UC2844BD1
Price: 0.0001 USD
Availability: InStock
Rating: 5 (1 reviews)

Current Mode PWM Controllers 0.5mA Current Mode

Manufacturer :	STMicroelectronics, Inc
Package/Case :	SO-8
Product Categories :	Current Mode PWM Controllers
Datasheet:	UC2844BD1 Datasheet (PDF)
RoHs Status:	Ecopack2
In-stock:	7595

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UC2844BD1 Product Details

The UC284xB family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off-state.

Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. The UC2842B and UC2844BD1 have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresholds for the UC2843B and UC2845B are 8.5V and 7.9V. The UC2842B and UC2843B can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC2844BD1 and UC2845B by the addition of an internal toggle flip flop which blanks the output off every other clock cycle.

Feature

LOWSTART-UPANDOPERATINGCURRENT
UNDERVOLTAGELOCKOUTWITHHYSTERESIS
INTERNALLYTRIMMEDREFERENCEWITHUNDERVOLTAGELOCKOUT
CURRENTLIMITING
TRIMMEDOSCILLATORFORPRECISEFREQUENCYCONTROL
CURRENTMODEOPERATIONTO500kHz
OSCILLATORFREQUENCYGUARANTEEDAT250kHz
LATCHINGPWMFORCYCLE-BY-CYCLE
HIGHCURRENTTOTEMPOLEOUTPUT
AUTOMATICFEEDFORWARDCOMPENSATION

UC2844BD1 Block Diagram
(Picture: Diagram)

Technical Parameters

Switching Frequency
500 kHz
Rise Time
50 ns
Fall Time
50 ns
Operating Supply Voltage
30 V
Number of Outputs
1
Maximum Operating Temperature
+ 150 C
Mounting Style
SMD/SMT
Package / Case
SO-8
Minimum Operating Temperature
- 40 C
Output Current
1000 mA
Output Voltage
4.95 V to 5.05 V
Packaging
Tube
Factory Pack Quantity
100
Topology
Boost, Flyback

UC2844BD1 Datasheet

UC2844B

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UC2844BD1 Related Products

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Q: How does Jotrin guarantee that UC2844BD1 is the original manufacturer or agent of ST?: We have a professional business development department to strictly test and verify the qualifications of ST original manufacturers and agents. All ST suppliers must pass the qualification review before they can publish their UC2844BD1 devices; we pay more attention to the channels and quality of UC2844BD1 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of UC2844BD1 chips? Including ST original factory information, Current Mode PWM Controllers application, UC2844BD1 pictures?: You can use Jotrin's intelligent search engine, or filter by Power Management ; AC-DC Converters ; PWM Controllers category, or find it through STMicroelectronics, Inc Information page.
Q: Are the ST's UC2844BD1 price and stock displayed on the platform accurate?: The ST's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for UC2844BD1, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Q: What is the process for returns or replacement of UC2844BD1?: All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the UC2844BD1 we delivered, we will accept the replacement or return of the UC2844BD1 only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
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Q: How to contact us and get support, such as UC2844BD1 datasheet pdf, UC2844B pin diagram?: Need any After-Sales service, please feel free contact us: sales@jotrin.com

STMicroelectronics, Inc

ST Microelectronics is a global independent semiconductor company and a leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications, and that designs, develops, manufactures and markets a broad spectrum of products....

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