樣品零售原裝正品COX3136DP(PWM 控制芯片，Standby power <0.3W)，批量價優。

COX導向系列AC-DC芯片，全麵兼容OB2263，LD7535，SG6848，RT7731，內置完善的OCP OVP (OTP) SCP保護PIN floating protection，性價比更優。

COXSEMI芯片同常用的電源芯片不但電氣性能及PCB Layout上能相兼容更有自己獨特的專利技術改進。

COXSEMI芯片專利技術：

1.內置4mS軟啟動功能開機時不易損壞MOS

2.內置“平滑頻率返送”電路，減少待機功耗，負載從空載到滿載過程中無音頻噪音。

3.獨特的PIN腳懸空保護電路，防止生產過程中燒毀MOS，減小不必的損失。

4.內置ESD放電回路，提高產品的抗ESD性能，增加產品的可靠性。

品牌 COX導向               型號 COX3136DP

批號 1211                    封裝 DIP-8
營銷方式 廠傢直銷           產品性質 新品
處理信號 數模混合信號      制作工藝 半導體集成
導電類型 雙極型              集成程度 中規模
工作溫度 -40~125（℃）  類型 電源模塊

詳細說明：
適合輸出功率1W--100W范圍的電源裝置。
高性能的電流模式PWM控制方式。
Coxsemi product 內置開關頻率擾動功能，所設計的電源容易通過EMI測試。
Pin-to-pin 兼容市場目前已有的競爭對手型號，包括XX2263, XX7535, XX7731, 等. 變壓器等外部電路參數也無需修改。
芯片內部專利的設計技術，提高改善瞭電源適配器ESD性能

《1》PIN TO PIN 兼容所列舉的市場上常見的型號，例如OB2263,LD7535,SG6848,RT7731等。
《2》IC成本有優勢，價格降低瞭約10-15%.
《3》整個電源成本可以再額外節省外部元件成本10%。
《4》內部的性能做瞭專利的改進：
-----內置4ms 軟起動功能，不宜損壞MOS FET
-----內置頻率抖動，極大方便於EMI設計
-----內置ESD放電回路，可以節省Y電容
-----內置VDD保護，外部輔助源電路節省穩壓器見
-----內置“平滑頻率轉折”電路，待機功耗低，負載從0到滿載沒有音頻噪音
-----COX3136的引腳如果發生虛焊懸空，不會燒毀MOS FET。
-----完善的過流，過壓保護設計。

MOSFET.
-------CS pin floating protection.

FEATURES
z Built-in Soft Start Function
z All Pins Floating Protection
z High Voltage CMOS Process with Excellent
ESD Protection
z Very Low Start-up Current
z Proprietary “Smooth Frequency Foldback” and Burst Mode Operation for Green Mode
Operation
z Proprietary “Hybrid Frequency Jittering”
z Current Mode Control
z Built-in Slope Compensation
z Leading Edge Blanking (LEB)
z Programmable Switching Frequency
z Proprietary “Constant Power Limiting”
z Audio Noise Free Operation
z OVP (Over Voltage Protection) on VDD
z OLP (Over Load Protection)
z Cycle-by-cycle Current Limiting (OCP)
APPLICATIONS
Offline AC/DC flyback converter for
z AC/DC Adaptors
z Set-Top Box Power Supplies
z ATX Standby Power
z Battery Charger
z Open-frame SMPS
GENERAL DESCRIPTION
COX3136 is a high performance, low cost, highly integrated current mode PWM controller for offline flyback converter applications.
The IC integrates Coxsemi’s Proprietary “Hybrid Frequency Jittering” for the oscillator to reduce conduction EMI emission of a power supply. When the output power demands decrease, the IC enters into Coxsemi’s Proprietary “Smooth Frequency Foldback” for high power conversion efficiency without audio noise generated. When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters into burst mode and provides excellent efficiency without audio noise.
The IC has built-in synchronized slope compensation to prevent sub-harmonic oscillation at high PWM duty output. A Proprietary “Constant Power Limiting” block is integrated to achieve constant output power limit over universal AC input range. The IC also has builtin soft start function to soften the stress on the MOSFET during power on period.
COX3136 integrates functions and protections of Under Voltage Lockout (UVLO), VCC Over Voltage Protection (OVP), Cycle-by-cycle Current Limiting (OCP), Over Load Protection (OLP), All Pins Floating Protection, RT Pin Short-to-GND Protection, Gate Clamping, VCC Clamping, Leading Edge Blanking (LEB).
COX3136 is available in SOT23-6, SOP-8 and DIP-8 packages.

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