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SG6859ADZ

Green-Mode PWM Controller for Flyback Converter, Programmable Frequency 50KHz ~ 80KHz

Manufacturer:

onsemi
Mfr.Part #:

SG6859ADZ
Datasheet:

SG6859ADZ Datasheet (PDF)
Mounting Style:

Through Hole
Output Voltage:

18 V
Switching Frequency:

75 kHz
Duty Cycle - Max:

72 %
EDA/CAD Models:

Request Free CAD Models for SG6859ADZ

Email: [email protected]

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Tel: +852 95804164

SG6859ADZ General Description

This highly integrated PWM controller provides several special enhancements designed to meet the low standby-power needs of low-power SMPS. To minimize standby power consumption, the proprietary green-mode function provides off-time modulation to linearly decrease the switching frequency under light-load conditions. This green-mode function enables the power supply to meet even the strictest power conservation requirements.The BiCMOS fabrication process enables reducing the start-up current to 9uA, and the operating current to 3mA. To further improve power conservation, a large start-up resistance can be used. Built-in synchronized 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 (90 VAC to 264 VAC). 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, the SG6859A’s output driver is clamped at 17 V. SG6859A controllers can be used to improve the performance and reduce the production cost of power supplies. The best choice for replacing linear and RCC-mode power adapters, The SG6859A is available in 8-pin DIP and 6-pin SOT-26 packages.

Key Features

Green-Mode PWM
Supports the “Blue Angel” Standard
Low Start-up Current (9uA)
Low Operating Current (3mA)
Leading-Edge Blanking
Constant Output Power Limit
Universal Input
Built-in Synchronized Slope Compensation
Current Mode Operation
Cycle-by-cycle Current Limiting
Under Voltage Lockout (UVLO)
Programmable PWM Frequency with Frequency Hopping
VDD Over Voltage Protection (Auto Restart)
Gate Output Voltage Clamped at 17V
Low Cost
Few External Components Required
Small SOT-26 and Dip 8 Packages

Specifications

Product Category	AC/DC Converters	Mounting Style	Through Hole
Output Voltage	18 V	Switching Frequency	75 kHz
Duty Cycle - Max	72 %	Minimum Operating Temperature	- 20 C
Maximum Operating Temperature	+ 85 C	Series	SG6859A
Number of Outputs	1 Output	Product Type	AC/DC Converters
Subcategory	PMIC - Power Management ICs	Type	Current Mode
Unit Weight	0.014448 oz