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HGSEMI UC3845BM/TR product image
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HGSEMI UC3845BM/TRRoHS

Manufacturer
HGSEMIAsian Brands
MPN
UC3845BM/TR
LCSC Part #
C2987354
Packaging
SOP-8
Customer #
Key Attributes
CURRENT MODE PWM CONTROLLER
Datasheetpdf iconHGSEMI UC3845BM/TR
In-Stock: 2,225
2,225 In stock, ships now
Add to BOM List
QtyUnit PriceTotal Amount
5+$ 0.3105$ 1.55
50+$ 0.2455$ 12.28
150+$ 0.2176$ 32.64
500+$ 0.1829$ 91.45
2,500+$ 0.1596$ 399.00
5,000+$ 0.1503$ 751.50
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
ManufacturerHGSEMI
PackagingSOP-8
Operating Temperature0℃~+70℃
Frequency - Switching52kHz
Output Current1A
Pd - Power Dissipation1W
Voltage - Breakdown-
Voltage - Supply-
Topology-
FeaturesUnder-voltage lockout;Under Voltage Protection;Over Current Protection
Output Voltage-
Duty Cycle(Max)50%
Feedback System-
Working ModePWM Modulation
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Additional Information

TypeDetails
Minimum5
Multiple5
Standard Packaging2500
Sales UnitPiece

Introduction

AI Translation

The UC3842B/43B/44B/45B are fixed frequency current mode PWM controller. They are specially designed for OFF−Line and DC to DC converter applications with a minimal external components. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET. Protection circuitry includes built under voltage lockout and current limiting. The UC3842B, UC3844B have UVLO thresholds of 16 V (on) and 10 V (off). The corresponding thresholds for the UC3843B, UC3845B are 8.4V (on) and 7.6V (off). The UC3842B, UC3843B can operate within 100% duty cycle. The UC3844B, UC3845B can operate within 50% duty cycle. The UC3842B/43B/44B/45B is characterized for operation from TA = -40°C to 85°C.

Features

AI Translation
  • Low Start-Up and Operating Current
  • High Current Totem Pole Output
  • Under voltage Lockout With Hysteresis Operating Frequency Up To 500KHz