LCSC Electronics logoLCSC Electronics svg logo
Sign In
USD
Cart
UMW UC3842B product image
  • UC3842B thumbnail 1
  • UC3842B thumbnail 2
  • UC3842B thumbnail 3
  • Pinout
  • Footprint
Images for reference only

UMW UC3842BRoHS

Manufacturer
UMWAsian Brands
MPN
UC3842B
LCSC Part #
C347459
Packaging
SOP-8
Customer #
Key Attributes
DC converter applications with minimal external components
Datasheetpdf iconUMW UC3842B
In-Stock: 32,860
32,860 In stock, ships now
Add to BOM List
QtyUnit PriceTotal Amount
5+$ 0.1101$ 0.55
50+$ 0.0965$ 4.83
150+$ 0.0907$ 13.61
500+$ 0.0835$ 41.75
2,500+$ 0.0744$ 186.00
5,000+$ 0.0724$ 362.00
Standard Packaging2500/Full Reel
Better price for more quantity?
$

Products Specifications

Show similar products (0) >
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers
ManufacturerUMW
PackagingSOP-8
Operating Temperature0℃~+70℃@(TA)
FeaturesCycle-by-cycle current limiting;External compensation;Frequency synchronization
Number of Channels1
Frequency - Switching50kHz
Switch tube (built-in/external)External
Quiescent Current17mA
Report an ErrorShow similar products (0) >

Additional Information

TypeDetails
Minimum5
Multiple5
Standard Packaging2500
Sales UnitPiece

Introduction

AI Translation

The 3842/43/44/45 series are fixed-frequency current-mode PWM controllers designed for off-line and DC-DC converter applications using minimal external components. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a temperature-compensated reference voltage, a high-gain error amplifier, a current sensing comparator, and a high-current totem-pole output ideally suited for driving power MOSFETs. Protection features include built-in undervoltage lockout and current limiting. The 3842 and 3844 have undervoltage lockout thresholds of 16V (turn-on) and 10V (turn-off). The corresponding thresholds for the 3843/45 are 8.4V (turn-on) and 7.6V (turn-off). The 3842 and 3843 operate up to 100% duty cycle. The 3844 and 3845 operate up to 50% duty cycle. The startup current for this device family is typically 0.5mA.

Features

AI Translation
  • Low startup and operating current
  • High-current totem-pole output
  • Undervoltage lockout with hysteresis
  • Operating frequency up to 500kHz