LCSC Electronics logoLCSC Electronics svg logo
Sign In
USD
Cart
OB OB2571TCPA product image
  • OB2571TCPA thumbnail 1
  • OB2571TCPA thumbnail 2
  • OB2571TCPA thumbnail 3
  • Pinout
  • Footprint
Images for reference only

OB OB2571TCPARoHS

Manufacturer
OBAsian Brands
MPN
OB2571TCPA
LCSC Part #
C507641
Packaging
SOP-8
Customer #
Key Attributes
High Performance QR mode Primary-Side Power Switch
Datasheetpdf iconOB OB2571TCPA
In-Stock: 262
262 In stock, ships now
Minimum: 1Multiple: 1Sales Unit: Piece
Add to BOM List
QtyUnit PriceTotal Amount
1+$ 0.5092$ 0.51
10+$ 0.4031$ 4.03
30+$ 0.3574$ 10.72
100+$ 0.3003$ 30.03
500+$ 0.2742$ 137.10
1,000+$ 0.2595$ 259.50
Standard Packaging4000/Full Reel
Better price for more quantity?
$

Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/AC DC Converters, Offline Switchers
ManufacturerOB
PackagingSOP-8
Operating Temperature-20℃~+85℃
Frequency - Switching-
Output Current-
Pd - Power Dissipation-
Voltage - Breakdown-
Voltage - Supply9V~25V
TopologyFlyback
FeaturesConstant Current Mode (CC);Constant Voltage (CV);Over Voltage Protection;Short Circuit Protection;Overtemperature protection (OTP)
Output Voltage-
Duty Cycle(Max)-
Working ModeQR
Feedback SystemPrimary-side feedback
Report an ErrorShow similar products (0) >

Introduction

AI Translation

OB2571x is an excellent primary side regulation controller with CC/CV operation for medium level power AC/DC charger and adapter applications. The device integrates an internal power MOSFET and operates in QR mode to provide high efficiency along with several functions of built-in protections. It removes the need for secondary feedback circuitry to lower the total bill of material cost. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated.

In CV control, the controller changes the mode of operation according to load condition. At full loading, the controller operates in quasi-resonant (QR) mode in the universal line voltage. The primary side regulation power supplies up to high power without the efficiency limitation of DCM or audible noise.

In CC control, OB2571x samples the Vcs peak current and the demagnetization pulse to regulation the output current. The current and output power setting can be adjusted externally by the sense resistor Rs at CS pin.

OB2571x offers comprehensive protection coverage with auto-recovery feature including Cycle-by-Cycle current limiting, VDD OVP, OLP, SCP, OTP etc.

OB2571x consumes less than 75mW input power at no- load condition with high line voltage. OB2571x is offered in SOP8 package.

Features

AI Translation
  • Primary-side sensing and regulation operates in QR mode without TL431 and opto-coupler
  • High precision constant voltage and current regulation at universal AC input
  • Programmable CV and CC regulation
  • Integrated power MOSFET
  • Good dynamic response
  • Programmable Brownout Protection and Line OVP Protection(For 2571Lx only)
  • Built-in line compensation for tight CC regulation
  • Built-in fixed cable compensation
  • Built-in primary winding inductance compensation
  • Built-in control loop compensation
  • Built-in leading edge blanking (LEB)
  • Ultra low start-up current and low operating current
  • Comprehensive protection coverage with auto-recovery
  • VDD over voltage protection (VDD OVP)
  • VDD under voltage lockout with hysteresis (UVLO)
  • Cycle-by-cycle current limiting
  • Feedback open loop protection (OLP)
  • Output short circuit protection (SCP)

Applications

AI Translation
  • Medium level Power AC/DC offline SMPS for
  • Cell phone charger
  • Tablet PC AC/DC adapter
  • Set-top box power supplies