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RS2051N Datasheet

  • RS2051N

  • Novel Low Cost Green-Mode PWM Controller with Soft Start & M...

  • 13頁(yè)

  • ORISTER

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RS2051
Novel Low Cost Green-Mode PWM Controller
with Soft Start & Latch Mode
Description
The RS2051 is a highly integrated low cost current mode PWM controller, which is ideal for small power current mode of offline
AC-DC fly-back converter applications. Making use of external resistors, the IC changes the operating frequency and
automatically enters the PFM/CRM (Cycle Reset Mode) under light-load/zero-load conditions. This can minimize standby power
consumption and achieve power-saving functions. With a very low start-up current, the RS2051 could use a large value start-up
resistor (2Mohms). Built-in synchronized slope compensation enhances the stability of the system and avoids sub-harmonic
oscillation. Dynamic peak current limiting circuit minimizes output power change caused by delay time of the system over a
universal AC input range. Leading edge blanking circuit on current sense input could remove the signal glitch due to snubber
circuit diode reverse recovery and thus greatly reduces the external component count and system cost in the design. Cycle-by-
Cycle current limiting ensures safe operation even during short-circuit.
Excellent EMI performance is achieved built-in soft start with 1.2mS銆乻oft driver and frequency jitter.
The RS2051 offers perfect protection like OVP(Over Voltage Protection)銆丱LP(Over Load Protection)銆丼CP(Short circuit
protection)銆丱TP銆丼ense Fault Protection
銆丩M
(Latch Mode) and OCP(Over current protection). The RS2051鈥檚 output driver
is soft clamped to maximum 16.5V to protect the power MOSFET. RS2051 is offered in SOT-23-6L, SOT-8 and DIP-8 packages.
Features
Low Cost, PWM&PFM&CRM (Cycle Reset Mode)
Low Start-up Current (about 1.5渭A)
Low Operating Current (about 2.2mA)
Current Mode Operation
Under Voltage Lockout (UVLO)
Built-in Synchronized Slope Compensation
Built-in fixed soft start with 1.2mS
Built-in Frequency jitter for better EMI Signature
Programmable PWM Frequency
Audio Noise Free Operation
Leading edge Blanking on Sense input
Constant output power limiting for universal AC input
Range
SOT-23-6L銆丼OP8 and DIP-8 Pb-Free Packaging
Compatible with SG6848 (6849) / SG5701 / SG5848 /
LD7535 (7550) / OB2262 (2263) / OB2278錛?279錛?/div>
Soft Clamped GATE output voltage 16.5V
VDD over voltage protect 25.6V
Cycle-by-cycle current limiting
Sense Fault Protect ion
OTP (Over Temperature Protection)
Output SCP (Short circuit Protection)
Output OLP (Over Load Protection)
Latch mode After OLP&SCP
High-Voltage CMOS Process with ESD
Applications
Switching AC/DC Adaptor
Battery Charger
Open Frame Switching Power Supply
Standby Power Supplies
Set-Top Box Power Supplies
384X Replacement
Pin Configurations
DS-RS2051-02
September, 2007
www.Orister.com

RS2051N相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠商
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  • 英文版
    SINGLE-PHASE SILICON BRIDGE
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    SINGLE-PHASE SILICON BRIDGE
    GOOD-ARK [...
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    SINGLE PHASE 2.0 AMP BRIDGE RECTIFIERS
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    SINGLE PHASE 2.0 AMP BRIDGE RECTIFIERS
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    SILICON BRIDGE RECTIFIERS
    HY
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    CURRENT 2.0 Amperes VOLTAGE 50 to 1000 Volts
    DAESAN
  • 英文版
    SILICON BRIDGE RECTIFIERS
    BILIN
  • 英文版
    SINGLE PHASE 2.0 AMP BRIDGE RECTIFIERS
    FORMOSA [F...
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    SINGLE PHASE 2.0 AMP BRIDGE RECTIFIERS
    BYTES [Byt...
  • 英文版
    2.0A BRIDGE RECTIFIERS
    LRC [Lesha...
  • 英文版
    SINGLE-PHASE SILICON BRIDGE
    GOOD-ARK [...
  • 英文版
    SINGLE PHASE BRIDGE RECTIFIER
    ETC [ETC]
  • 英文版
    TECHNICAL SPECIFICATIONS OF SINGLE-PHASE SILICON BRIDGE RECT...
    DCCOM [Dc ...
  • 英文版
    SINGLE PHASE BRIDGE RECTIFIER
    ETC
  • 英文版
    SINGLE-PHASE SILICON BRIDGE
    GOOD-ARK
  • 英文版
    SINGLE PHASE 2.0 AMP BRIDGE RECTIFIERS
    FORMOSA
  • 英文版
    2.0A BRIDGE RECTIFIERS
    LRC

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