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PWM Controller, Current Mode, 11V to 30V Supply, 500kHz, 1.6Vlow & 13.Vhigh/200mA out, SOIC-8
Brands: STMicroelectronics, Inc
Mfr.Part #: UC2845BD1013TR
Datasheet: UC2845BD1013TR Datasheet (PDF)
Product Type: Power Management ICs
Stock Condition: 3445 pcs, New Original
1Add To Bom
UC2845BD1013TR General Description
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 UC2844B 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 UC2844B and UC2845B by the addition of an internal toggle flip flop which blanks the output off every other clock cycle.
- LOW START-UP AND OPERATING CURRENT
- UNDERVOLTAGE LOCKOUT WITH HYSTERESIS
- INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT
- CURRENT LIMITING
- TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL
- CURRENT MODE OPERATION TO 500kHz
- OSCILLATOR FREQUENCY GUARANTEED AT 250kHz
- LATCHING PWM FOR CYCLE-BY-CYCLE
- HIGH CURRENT TOTEM POLE OUTPUT
- AUTOMATIC FEED FORWARD COMPENSATION
|Manufacturer:||STMicroelectronics||Product Category:||Switching Controllers|
|RoHS:||Details||Topology:||Boost, Flyback, Forward|
|Number of Outputs:||1 Output||Switching Frequency:||500 kHz|
|Duty Cycle - Max:||50 %||Input Voltage:||30 V|
|Output Voltage:||4.95 V to 5.05 V||Output Current:||1 A|
|Minimum Operating Temperature:||- 40 C||Maximum Operating Temperature:||+ 150 C|
|Mounting Style:||SMD/SMT||Package / Case:||SOIC-8|
|Fall Time:||50 ns||Operating Supply Voltage:||30 V|
|Product Type:||Switching Controllers||Rise Time:||50 ns|
|Series:||UC2845B||Factory Pack Quantity:||2500|
|Subcategory:||PMIC - Power Management ICs||Type:||Current Mode PWM Controllers|
|Unit Weight:||0.017870 oz|
|Shipping Type||Ship Fee||Lead Time|
|DHL||$20.00-$40.00 (0.50 KG)||2-5 days|
|Fedex||$20.00-$40.00 (0.50 KG)||2-5 days|
|UPS||$20.00-$40.00 (0.50 KG)||2-5 days|
|TNT||$20.00-$40.00 (0.50 KG)||2-5 days|
|EMS||$20.00-$40.00 (0.50 KG)||2-5 days|
|REGISTERED AIR MAIL||$20.00-$40.00 (0.50 KG)||2-5 days|
Processing Time：Shipping fee depend on different zone and country.
|Terms of payment||Hand Fee|
|Wire Transfer||charge US$30.00 banking fee.|
|Paypal||charge 4.0% service fee.|
|Credit Card||charge 3.5% service fee.|
|Western Union||charge US$0.00 banking fee.|
|Money Gram||charge US$0.00 banking fee.|
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UC2845BD1013TR Datasheet PDF
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