TDSEMIC

UC3845-TD

Switching Regulator IC 1A SOP-8

SOP-8ROHS CompliantActive

Current-mode PWM controller

Manufacturer: TDSEMIC
Manufacturer part #: UC3845-TD
Store part #: C42422134
Package / case: SOP-8
Category: Voltage Regulators - DC DC Switching Regulators
Packaging: Tape & Reel (TR)

Datasheet (PDF)

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4,870 in stock

#C42422134

Stock & price checked 8 days ago

Quantity	Unit price	Pack price
5+	₹11.39	₹56.95
50+	₹10.03	₹501.50
150+	₹9.34	₹1,401.00
500+	₹8.82	₹4,410.00
2,500+	₹8.41	₹21,025.00
5,000+	₹8.22	₹41,100.00

Quantity (min 5, multiples of 5)

5 × ₹11.39

₹56.95

excl. GST

₹67.20 incl. 18% GST

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GST invoice with every order
Standard pack: 2,500 per reel

UC3845-TD

₹56.95 for 5 + GST

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Specifications

Operating Temperature: 0℃~+70℃@(TA)
Number of Outputs: 1
Frequency - Switching: 52kHz;100kHz~500kHz
Features: Cycle-by-cycle current limiting;Overcurrent Protection
Output Type: Adjustable
Topology: Flyback;Forward
Operating Voltage: 30V
Switch tube (built-in/external): External
Output Current: 1A
Quiescent Current: 12mA

Packaging & compliance

RoHS: ROHS Compliant
Lifecycle: Active
Moisture sensitivity: MSL 2 (1 year)
Packaging: Tape & Reel (TR)
Standard pack: 2,500 / Reel
Sold per: Piece
Minimum order: 5 (multiples of 5)
Unit weight: 0.114 g

Overview

UC3845 is a high-performance fixed-frequency current-mode controller designed for isolated or DC-DC converter applications, offering designers a cost-effective solution with minimal external components. The circuit features an undervoltage lockout module with startup current less than 0.5mA, a precision reference voltage connected to the error amplifier input — trimmed for 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 structure is suitable for driving N-channel MOSFETs, with the output held low during shutdown.