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UC1843A-EP

Texas Instruments
Part Number UC1843A-EP
Manufacturer Texas Instruments
Description Current-Mode PWM Controllers
Published Oct 16, 2019
Detailed Description UC1842A-EP, UC1843A-EP, UC1844A-EP, UC1845A-EP CURRENT-MODE PWM CONTROLLER D Controlled Baseline − One Assembly/Test Si...
Datasheet PDF File UC1843A-EP PDF File

UC1843A-EP
UC1843A-EP

Overview
UC1842A-EP, UC1843A-EP, UC1844A-EP, UC1845A-EP CURRENT-MODE PWM CONTROLLER D Controlled Baseline − One Assembly/Test Site, One Fabrication Site D Extended Temperature Performance of −55°C to 125°C D Enhanced Diminishing Manufacturing Sources (DMS) Support D Enhanced Product Change Notification D Qualification Pedigree† D Optimized for Off-line and DC-to-DC Converters D Low Start Up Current (<0.
5 mA) D Trimmed Oscillator Discharge Current † Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range.
This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life.
Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.
SGLS134D − SEPTEMBER 2002 − REVISED JANUARY 2013 D Automatic Feed Forward Compensation D Pulse-by-Pulse Current Limiting D Enhanced Load Response Characteristics D Under-Voltage Lockout With Hysteresis D Double Pulse Suppression D High Current Totem Pole Output D Internally Trimmed Bandgap Reference D 500 kHz Operation D Low RO Error Amp D PACKAGE (TOP VIEW) COMP VFB ISENSE RT/CT 1 2 3 4 8 VREF 7 VCC 6 OUTPUT 5 GND description The UC1842A/3A/4A/5A family of control ICs is a pin-for-pin compatible improved version of the UC3842/3/4/5 family.
Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features.
Start up current is guaranteed to be less than 0.
5 mA.
Oscillator discharge is trimmed to 8.
3 mA.
During under voltage lockout, the output stage can sink at least 10 mA at less than 1.
2 V for VCC over 5 V.
The difference between members of this family are shown in the table below.
PART NUMBER UC1842A UC1843A UC1844A UC1845A UVLO ON 16 V 8.
5 V 16 V 8.
5 V UVLO OFF 10 V 7.
9 V 10 V ...


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