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HGSEMI UC3845M/TR product image
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HGSEMI UC3845M/TRRoHS

Manufacturer
HGSEMIAsian Brands
MPN
UC3845M/TR
LCSC Part #
C434472
Packaging
SOP-8
Customer #
Key Attributes
Current Mode PWM Controller
Datasheetpdf iconHGSEMI UC3845M/TR
In-Stock: 1,435
1,435 In stock, ships now
Add to BOM List
QtyUnit PriceTotal Amount
5+$ 0.2675$ 1.34
50+$ 0.2059$ 10.30
150+$ 0.1795$ 26.93
500+$ 0.1466$ 73.30
2,500+$ 0.1393$ 348.25
5,000+$ 0.1305$ 652.50
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 - Supply12V~25V
Topology-
FeaturesSlope compensation;Under-voltage lockout;Under Voltage Protection
Output Voltage0V~28V
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

UC3845 is a high-performance fixed-frequency current-mode controller designed for isolated or DC-DC converter applications, providing designers with a cost-effective solution requiring minimal external components. The circuit incorporates an UVLO module with startup current less than 0.5mA. A trimmed high-precision reference voltage source is connected to the error amplifier input to ensure high accuracy. Additional internal blocks include logic circuitry for latched operation, current limiting, and a PWM comparator designed for high-current totem-pole output. This output architecture is suitable for driving N-channel MOSFETs, with the output held low during shutdown.

Features

AI Translation
  • Optimized for isolated or DC/DC converters
  • Low startup current (< 0.5mA)
  • Automatic feed-forward compensation
  • Cycle-by-cycle current limiting
  • Enhanced load transient response
  • UVLO with hysteresis
  • Double-pulse suppression
  • High-current totem-pole output
  • Internal trimmed bandgap reference
  • Operating frequency up to 500kHz

Applications

AI Translation
  • Power Converters