OB2269C

Features: On-Bright Proprietary Frequency Shuffling Technology for Improved EMI Performance Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design Audio Noise Free Operation External Programmable PWM Switching Frequency Internal Synchronized Slope Compensation Low VI...

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SeekIC No. : 004437209 Detail

OB2269C: Features: On-Bright Proprietary Frequency Shuffling Technology for Improved EMI Performance Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design Audio Noise Free Ope...

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Part Number:
OB2269C
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/22

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Product Details

Description



Features:

On-Bright Proprietary Frequency Shuffling Technology for Improved EMI Performance
Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design
Audio Noise Free Operation
External Programmable PWM Switching Frequency
Internal Synchronized Slope Compensation
Low VIN/VDD Startup Current(6.5uA) and Low Operating Current (2.3mA)
Leading Edge Blanking on Current Sense Input
Complete Protection Coverage With Auto Self- Recovery
o External Programmable Over Temperature Protection (OTP)
o With or Without On-chip VDD OVP for System OVP
o Under Voltage Lockout with Hysteresis (UVLO)
o Gate Output Maximum Voltage Clamp (18V)
o Line Compensated Cycle-by-Cycle Overcurrent Threshold Setting For Constant Output Current Limiting Over Universal Input Voltage Range (OCP)
o Over Load Protection. (OLP)



Application

Offline AC/DC flyback converter for
Laptop Power Adaptor
PC/TV/Set-Top Box Power Supplies
Open-frame SMPS
Battery Charger



Pinout

  Connection Diagram


Specifications

Parameter Value
VDD/VIN DC Supply Voltage 30 V
VDD Zener Clamp VoltageNote VDD_Clamp+0.1V
VDD Clamp Continuous Current 10 mA
VFB Input Voltage -0.3 to 7V
VSENSE Input Voltage to Sense Pin -0.3 to 7V
VRT Input Voltage to RT Pin -0.3 to 7V
VRI Input Voltage to RI Pin -0.3 to 7V
Min/Max Operating Junction Temperature TJ -20 to 150
Min/Max Storage Temperature Tstg -20 to 150
Lead Temperature (Soldering,10secs) 260



Description

OB2269C is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications.

PWM switching frequency at normal operation is externally programmable and trimmed to tight range. At no load or light load condition, the IC operates in extended 'burst mode' to minimize switching loss. Lower standby power and higher conversion efficiency is thus achieved.

VDD low startup current and low operating current contribute to a reliable power on startup design with OB2269C. A large value resistor could thus be used in the startup circuit to minimize the standby power.

The internal slope compensation improves system large signal stability and reduces the possible subharmonic oscillation at high PWM duty cycle output. Leading-edge blanking on current sense input removes the signal glitch due to snubber circuit diode reverse recovery. This greatly helps to reduce the external component count and system cost in application.

OB2269C offers complete protection coverage with automatic self-recovery feature including Cycle-by- Cycle current limiting (OCP), over load protection (OLP), over temperature protection (OTP), VDD over voltage protection (OVP) and under voltage lockout (UVLO). The Gate-drive output is clamped at 18V to protect the power MOSFET.

In OB2269C, OCP threshold slope is internally optimized to reach constant output power limit over universal AC input range.

Excellent EMI performance is achieved with On- Bright proprietary frequency shuffling technique together with soft switching control at the totem pole gate drive output.

The tone energy at below 20KHZ is minimized in operation. Consequently, audio noise performance is greatly improved.

OB2269C is offered in both SOP-8 and DIP-8 packages.




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