Green-Mode PWM Controller
NOT RECOMMENDED FOR NEW DESIGNS
SG6848x1 — Low Cost, Green-Mode PWM Controller for Flyback Converters
SG6848x1
Low-Cos...
Description
NOT RECOMMENDED FOR NEW DESIGNS
SG6848x1 — Low Cost, Green-Mode PWM Controller for Flyback Converters
SG6848x1
Low-Cost, Green-Mode PWM Controller for Flyback Converters
Features
Green-Mode PWM Controller Low Startup Current: 5 μA Low Operating Current: 3 mA Programmable PWM Frequency Peak-Current-Mode Operation Leading-Edge Blanking Built-in Synchronized Slope Compensation Cycle-by-Cycle Current Limiting Constant Output Power Limit Gate Output Voltage Clamped at 15 V Small SSOT-6 Package
Applications
General-purpose switched-mode power supplies (SMPS) and flyback power converters, such as:
Battery chargers for cellular phones, cordless phones,
PDAs, digital cameras, and power tools
Power adapters for ink jet printers, video game
consoles, and portable audio players
Open-frame SMPS for TV/DVD standby and auxiliary
supplies, home appliances, and consumer electronics
Replacements for linear transformers and RCC SMPS PC 5 V Standby Power
Description
This highly integrated PWM controller provides several enhancements to meet the low standby-power needs of low-power SMPS. To minimize standby power consumption, the proprietary Green Mode provides offtime modulation to continuously decrease PWM frequency under light-load conditions. Green Mode enables the power supply to meet even strict power conservation requirements.
The BiCMOS fabrication process enables reducing the startup current to 5 μA and the operating current to 3 mA. As a result, a lar...
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