Part Number: RM6222D

Function : Dedicated current mode PWM controller

Package:  DIP 8 Pin Type

Manufacturer: Mediatek

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Description

RM6222D combines a dedicated current mode PWM controller with a high voltage power MOSFET. It is optimized for high performance,low standby power ,and cost effective of f-line flyback converter applications in sub 20W range. RM6222D of fers co mplete protection coverage w ith automatic self-recovery feature inclu ding Cycle-by-Cycle current limiting,over load pr otection,VDD over voltage clamp and under volt age lockout. Excellent EMI performance is achieved with freque ncy shuf fling technique together with sof t switching control at the totem pole gate drive output.

Pinout

 

Features

1. Power on soft start reducing MOSFET Vds stress.
2. Frequency shuffling for EMI
3. Extended B urst Mode control for improved e fficiency and minimum standby power design
4. Audio noise free operation
5. Fixed 50Khz switching frequency
6. Internal synchronized slop compensation
7. Low VDD st art-up curre nt and low operationg current
8. LEB and current sense input

 

RM6222D Datasheet

 

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Part Number: LD7750RGR

Function: High Voltage Green-Mode PWM Controller with Over Temperature Protection

Package: SOP-7 Pin Type

Manufacturer: Leadtrend Technology ( www.leadtrend.com.tw )

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GENERAL

Description

The LD7750RGR integrates several functions of protections, and EMI-improved solution in a SOP-7 package to minimize the component counts and the circuit space. The device provides functions of low startup current, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation. Also, the LD7750R features more protections like OLP (Over Load Protection), OVP (Over Voltage Protection), and  OTP (Over Temperature Protection) to prevent the circuit being damaged under the abnormal conditions. The LD7750R features built-in auto-recovery function for OVP on Vcc pin and OLP.

Pinout

Features

1. High-Voltage (500V) Startup Circuit

2. Current Mode Control

3. Green Mode Control

4. UVLO (Under Voltage Lockout)

5. LEB (Leading-Edge Blanking) on CS Pin

6. Internal Frequency Swapping

7. Internal Slope Compensation

8. Internal Over Current Protection

9. OVP (Over Voltage Protection) on Vcc

10. OLP (Over Load Protection)

11. External OTP through a NTC

12. 500mA Driving Capability

 

Applications:

1. Switching AC/DC Adaptor and Battery Charger

2. Open Frame Switching Power Supply

3. LCD Monitor/TV Power

LD7750RGR Datasheet PDF

 

Other data sheets are available within the file: LD7750RGS, LD7750, LD7750RGN

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