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PWM Controller, Current Mode, 11V to 30V Supply, 500kHz, 1.6Vlow & 13.Vhigh/200mA out, SOIC-8
| Manufacturer : | STMicroelectronics, Inc |
|---|---|
| Package/Case : | SO-8 |
| Product Categories : | Current Mode PWM Controllers |
| Datasheet: | UC2845BD1013TR Datasheet (PDF) |
| RoHs Status: | Rohs |
| In-stock: | 12644 |
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UC2845BD1013TR Product Details
. TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL
. OSCILLATOR FREQUENCY GUARANTEED AT 250kHz
. CURRENT MODE OPERATION TO 500kHz
. 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 START-UP AND OPERATING CURRENT
DESCRIPTION
The UC384xB 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 offstate.
Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. The UC3842B and UC3844B have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresholds for the UC3843B and UC3845B are 8.5 V and 7.9 V. The UC3842B and UC3843B can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC3844B and UC3845B 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
(Picture: Pinout)
(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
- Reel
- Factory Pack Quantity
- 2500
- Topology
- Boost, Flyback
UC2845BD1013TR Datasheet
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UC2845B
UC2845BD1013TR Related Products
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Guarantees
1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
FAQ:
- Q: How does Jotrin guarantee that UC2845BD1013TR 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 UC2845BD1013TR devices; we pay more attention to the channels and quality of UC2845BD1013TR products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
- Q: How to find the detailed information of UC2845BD1013TR chips? Including ST original factory information, Current Mode PWM Controllers application, UC2845BD1013TR 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 UC2845BD1013TR price and stock displayed on the platform accurate?
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Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days. - Q: What is the process for returns or replacement of UC2845BD1013TR?
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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 UC2845BD1013TR we delivered, we will accept the replacement or return of the UC2845BD1013TR 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.
(2)We are informed of the defect described above within 90 days after the delivery of UC2845BD1013TR.
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Two processes to return the products:
(1)Inform us within 90 days
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More details about return electronic components please see our Return & Change Policy. - Q: How to contact us and get support, such as UC2845BD1013TR datasheet pdf, UC2845B pin diagram?
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