Product Information

E-UC3843BN

E-UC3843BN electronic component of STMicroelectronics

Datasheet
Switching Controllers 0.5mA Current Mode

Manufacturer: STMicroelectronics
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges



Price (USD)

1: USD 1.2843 ea
Line Total: USD 1.2843

0 - Global Stock
MOQ: 1  Multiples: 1
Pack Size: 1
Availability Price Quantity
0 - Global Stock


Ships to you between Thu. 04 Apr to Wed. 10 Apr

MOQ : 1
Multiples : 1

Stock Image

E-UC3843BN
STMicroelectronics

1 : USD 0.7782
10 : USD 0.6446
100 : USD 0.6167
500 : USD 0.5479
1000 : USD 0.4591
2500 : USD 0.4213

     
Manufacturer
Product Category
Input Voltage
Output Voltage
Output Current
Package / Case
Packaging
Brand
Supply Voltage Min
Supply Voltage Max
Controller Ic Case Style
No. Of Pins
Frequency
Operating Temperature Min
Operating Temperature Max
Svhc
Base Number
Controller Type
Ic Generic Number
Ic Temperature Range
Logic Function Number
Operating Temperature Range
Output Current Max
Output Energy Per Cycle
Power Dissipation Pd
Power Supply Ic Type
Supply Voltage Range
LoadingGif

Notes:- Show Stocked Products With Similar Attributes.
Image Description
E-ULQ2004A electronic component of STMicroelectronics E-ULQ2004A

Trans Darlington NPN 50V 0.5A 16-Pin PDIP
Stock : 0

EVAL5981 electronic component of STMicroelectronics EVAL5981

Power Management IC Development Tools EVAL BRD FOR L5981
Stock : 0

EVAL4971 electronic component of STMicroelectronics EVAL4971

Power Management IC Development Tools Eval Board for L4971
Stock : 5

EVAL5945A electronic component of STMicroelectronics EVAL5945A

Power Management IC Development Tools EVAL BOARD L5945A
Stock : 0

EVAL5947A electronic component of STMicroelectronics EVAL5947A

L5947A - DC/DC, Step Down 1, Non-Isolated Outputs Evaluation Board
Stock : 0

EVAL5972D electronic component of STMicroelectronics EVAL5972D

Power Management IC Development Tools Eval Board for L5972
Stock : 0

EVAL5985 electronic component of STMicroelectronics EVAL5985

Power Management IC Development Tools EVAL BRD FOR L5985
Stock : 0

EVAL2293Q electronic component of STMicroelectronics EVAL2293Q

Power Management IC Development Tools L2293Q 4-Ch Driver Evaluation Board
Stock : 0

EVAL5945 electronic component of STMicroelectronics EVAL5945

Power Management IC Development Tools POWER SUPPLY EVB L5945
Stock : 0

EVAL5947 electronic component of STMicroelectronics EVAL5947

Power Management IC Development Tools EVAL BOARD L5947
Stock : 0

Image Description
MIC2196YM-TR electronic component of Microchip MIC2196YM-TR

Switching Controllers SO-8 3V Boost Contoller (Lead Free)
Stock : 1818

MIC2194YM electronic component of Microchip MIC2194YM

Switching Controllers SO-8 3V Buck Contoller (Lead Free)
Stock : 23

MIC2183YQS electronic component of Microchip MIC2183YQS

Switching Controllers QSOP-16 Low Vin Synchronous Buck PWM Control IC
Stock : 189

MIC2182-5.0YSM electronic component of Microchip MIC2182-5.0YSM

Switching Controllers High Efficiency Synchronous Buck Controller
Stock : 0

MIC2182-3.3YSM electronic component of Microchip MIC2182-3.3YSM

Switching Controllers High Efficiency Synchronous Buck Controller
Stock : 0

UC2842B/3B/4B/5B UC3842B/3B/4B/5B HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER . TRIMMED OSCILLATOR FOR PRECISE FRE- QUENCY CONTROL OSCILLATOR FREQUENCY GUARANTEED . AT 250kHz . CURRENT MODE OPERATION TO 500kHz .AUTOMATIC FEED FORWARD COMPENSA- TION Minidip SO8 .LATCHING PWM FOR CYCLE-BY-CYCLE CURRENT LIMITING .INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT comparator which also provides current limit control, HIGH CURRENT TOTEM POLE OUTPUT . and a totem pole output stage designed to source UNDERVOLTAGE LOCKOUT WITH HYSTER- . or sink high peak current. The output stage, suitable ESIS for driving N-Channel MOSFETs, is low in the off- . LOW START-UP AND OPERATING CURRENT state. Differences between members of this family are the DESCRIPTION under-voltage lockout thresholds and maximum duty The UC384xB family of control ICs provides the nec- cycle ranges. The UC3842B and UC3844B have essary features to implement off-line or DC to DC UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresh- fixed frequency current mode control schemes with a minimal external parts count. Internally imple- olds for the UC3843B and UC3845B are 8.5 V and 7.9 mented circuits include a trimmed oscillator for pre- V. The UC3842B and UC3843B can operate to duty cise DUTY CYCLE CONTROL under voltage lock- cycles approaching 100%. A range of the zero to < out featuring start-up current less than 0.5mA, a pre- 50 % is obtained by the UC3844B and UC3845B by cision reference trimmed for accuracy at the error the addition of an internal toggle flip flop which blanks amp input, logic to insure latched operation, a PWM the output off every other clock cycle. BLOCK DIAGRAM (toggle flip flop used only in UC3844B and UC3845B) 7 Vi UVLO 34V 8 5V VREF 5 S/R REF 5V 50mA GROUND INTERNAL BIAS 2.50V VREF GOOD LOGIC 6 OUTPUT 4 RT/CT OSC T ERROR AMP. 2R + S 2 VFB - R PWM R1V LATCH 1 COMP CURRENT SENSE 3 UC3842B CURRENT COMPARATOR SENSE D95IN331 March 1999 1/15UC2842B/3B/4B/5B - UC3842B/3B/4B/5B ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V Supply Voltage (low impedance source) 30 V i V Supply Voltage (Ii < 30mA) Self Limiting i I Output Current A O 1 EO Output Energy (capacitive load) 5 J Analog Inputs (pins 2, 3) 0.3 to 5.5 V Error Amplifier Output Sink Current 10 mA P 1.25 W tot Power Dissipation at T 25 C (Minidip) amb P 800 mW tot Power Dissipation at Tamb 25 C (SO8) T Storage Temperature Range 65 to 150 C stg T Junction Operating Temperature 40 to 150 C J T Lead Temperature (soldering 10s) 300 L C * All voltages are with respect to pin 5, all currents are positive into the specified terminal. PIN CONNECTION (top view) Minidip/SO8 COMP 1 8 V REF V 2 7 Vi FB I 3 6 OUTPUT SENSE R /C 4 5 GROUND T T D95IN332 PIN FUNCTIONS No Function Description 1 COMP This pin is the Error Amplifier output and is made available for loop compensation. 2V This is the inverting input of the Error Amplifier. It is normally connected to the switching FB power supply output through a resistor divider. 3I A voltage proportional to inductor current is connected to this input. The PWM uses this SENSE information to terminate the output switch conduction. 4R /C The oscillator frequency and maximum Output duty cycle are programmed by connecting T T resistor R to Vref and cpacitor C to ground. Operation to 500kHz is possible. T T 5 GROUND This pin is the combined control circuitry and power ground. 6 OUTPUT This output directly drives the gate of a power MOSFET. Peak currents up to 1A are sourced and sunk by this pin. 7V This pin is the positive supply of the control IC. CC 8V This is the reference output. It provides charging current for capacitor C through resistor R . ref T T ORDERING NUMBERS SO8 Minidip UC2842BD1 UC3842BD1 UC2842BN UC3842BN UC2843BD1 UC3843BD1 UC2843BN UC3843BN UC2844BD1 UC3844BD1 UC2844BN UC3844BN UC2845BD1 UC3845BD1 UC2845BN UC3845BN 2/15

Tariff Desc

8542.31.00 51 No ..Application Specific (Digital) Integrated Circuits (ASIC)

Electronic integrated circuits: Processors and controllers, whether or not combined with memories, converters, logic circuits, amplifiers, clock and timing circuits, or other circuits
Monolithic integrated circuits:
C-Max
C-Max (VA)
SG3
ST
ST MICROELECTRONICS
ST2
ST7
STM
STMICRELECTRONICS
STN

Looking for help? Visit our FAQ's Section to answer to all your questions

 

X-ON Worldwide Electronics

Welcome To X-ON ELECTRONICS
For over three decades, we have been advocating and shaping the electronic components industry. Our management complements our worldwide business scope and focus. We are committed to innovation, backed by a strong business foundation. If you need a trustworthy supplier of electronic components for your business – look no further.
 

Copyright ©2024  X-ON Electronic Services. All rights reserved.
Please ensure you have read and understood our Terms & Conditions before purchasing.
All prices exclude GST.

Image for all the cards that are accepted Image for all the cards that are accepted Image for all the cards that are accepted Image for all the cards that are accepted Image for all the cards that are accepted