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UMW UC2843BRoHS

Manufacturer
UMWAsian Brands
MPN
UC2843B
LCSC Part #
C2995532
Packaging
SOP-8
Customer #
Key Attributes
Fixed Frequency Current Mode PWM Controller
Datasheetpdf iconUMW UC2843B
In-Stock: 7,520
7,520 In stock, ships now
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QtyUnit PriceTotal Amount
5+$ 0.1773$ 0.89
50+$ 0.1412$ 7.06
150+$ 0.1257$ 18.86
500+$ 0.1064$ 53.20
2,500+$ 0.0854$ 213.50
5,000+$ 0.0802$ 401.00
Standard Packaging2500/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/AC DC Converters, Offline Switchers
ManufacturerUMW
PackagingSOP-8
Quiescent Current13mA
Synchronous RectifierNo
Operating Temperature-25℃~+85℃
Frequency - Switching50kHz
Output Current1A
Voltage - Supply10V~30V
FeaturesCycle-by-cycle current limiting;External compensation;Frequency synchronization
Topology-
Output TypeFixed
Output Voltage5V
Switch tube (built-in/external)External
Number of Channels1
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Additional Information

TypeDetails
Minimum5
Multiple5
Standard Packaging2500
Sales UnitPiece

Introduction

AI Translation

2842, 2843, 2844, and 2845 are fixed-frequency current-mode PWM controllers designed for off-line and DC-DC converter applications with minimal external components. Internally implemented circuitry includes a trimmed oscillator for precise duty cycle control, a temperature-compensated reference, 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 2842 and 2844 have UVLO thresholds of 16V (on) and 10V (off). The 2843 and 2845 have corresponding thresholds of 8.4V (on) and 7.6V (off). The 2842 and 2843 operate at up to 100% duty cycle. The 2844 and 2845 operate at up to 50% duty cycle. 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