ONSEMI SG6858 Green Mode PWM Controller for Flyback Converters

SKU: RZ24341264 Category: General

₹ 42.57

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Quantity	Discount	Price / Unit
5 – 10	2%	₹ 41.72
11 – 30	3%	₹ 41.30
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Product Details

Category General

Subcategory General

SKU RZ24341264

This highly integrated PWM controller provides several special enhancements designed to meet the low standby power needs of low-power SMPS. The proprietary green-mode function provides off-time modulation to linearly decrease the switching frequency under light-load conditions to minimise standby power consumption. This green-mode function enables the power supply to meet even the strictest power conservation requirements.

The BiCMOS fabrication process reduces the start-up current to 10uA and the operating current to 2.5mA. To further improve power conservation, a large start-up resistance can be used. Built-in synchronised slope compensation ensures the stability of peak current mode control. Proprietary internal compensation provides a constant output power limit over a universal AC input range (90Vac to 264Vac). Pulse-by-pulse current limiting ensures safe operation even during short circuits.

To protect the external power MOSFET from being damaged by supply over-voltage events, the SG6858's output driver is clamped at 17V. sG6858 controllers can be used to improve the performance and reduce the production cost of power supplies and can replace linear and RCC-mode power adapters. It is available in 8-pin DIP and 6-pin SOT-26 packages.

Features

Green-mode PWM
Supports the "Blue Angel" standard
Low start-up current (10uA)
Low operating current (2.5mA)
Leading-edge blanking
Constant output power limit
Universal input
Built-in synchronised slope compensation
Current-mode operation
Cycle-by-cycle current limiting
Under-voltage lockout (UVLO)
Programmable PWM frequency
VoD over-voltage protection (auto-restart)
Gate output voltage-clamped at 17V
Low cost
Few external components required
Small SOT-26 and DIP-S packages

Applications

Battery chargers for cellular phones, cordless phones,
PDAs, digital cameras, and power tools
Power adapters for inkjet 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 5V standby power

Datasheet

Specifications

Model	SG6858
Brand	FSC/ONSEMI
Supply Voltage (VDD)	30V DC
Input Voltage to FB Pin	-0.3 to 7.0V DC
Input Voltage to Sense Pin	-0.3V to 7.0V DC
Max. Duty Cycle	80%
Rising Time	250ns
Falling Time	75ns
Country of Origin	China