IC 6850 CR6850 CR6850S SOT23-6 (SMD Dán)

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CR6850 6850 SOT23-6 PWM Controller Power Supply IC

The CR6850 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 green-power functions. With a very low start-up current, the CR6850 could use a large value start-up resistor (2Mohm). Built-in synchronized slope compensation enhances the stability of the system and avoids sub-harmonic oscillation. Dynamic peak 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. Pulse-by-pulse current limiting ensures safe operation enduring short-circuit. The CR6850 offers more protection like OVP (Over Voltage Protection) and OCP (Over current protection). The CR6850’s output driver is soft clamped to maximum 16.8V to protect the power MOSFET. Excellent EMI performance is achieved soft switching control at the totem pole gate driver output. CR6850 is offered in SOT-23-6, SOT-8 and DIP-8 packages.

Features- Low Cost, PWM&PFM&CRM (Cycle Reset Mode) - Low Start-up Current (about 8µA) - Low Operating Current (about 2mA) - Current Mode Operation - Under Voltage Lockout (UVLO) - Built-in Synchronized Slope Compensation - Programmable PWM Frequency - Audio Noise Free Operation - Leading edge Blanking on Sense input - Constant output power limiting for universal AC input - Cycle-by-cycle current limiting - Soft clamped gate output voltage 16.8V - Over voltage protect 25.5V - High-Voltage CMOS Process with ESD - SOT-23-6L、SOP8 & DIP-8 Pb-Free Packaging - Compatible with SG5701 & SG5848 & LD7535 & OB2262/63

Applications - Switching AC/DC Adaptor - Battery Charger - Open Frame Switching Power Supply - 384X Replacement

Datasheet:

http://belchip.by/sitedocs/08484.pdf

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