SG6859DZ Fairchild Semiconductor, SG6859DZ Datasheet

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SG6859DZ

Manufacturer Part Number
SG6859DZ
Description
IC CTRLR PWM PROG GREEN CM 8DIP
Manufacturer
Fairchild Semiconductor
Datasheet
1.SG6859TZ.pdf (13 pages)

Specifications of SG6859DZ

Output Isolation
Isolated
Frequency Range
65 ~ 75kHz
Voltage - Input
11.5 ~ 30 V
Voltage - Output
18V
Operating Temperature
-20°C ~ 150°C
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Low Cost Green-Mode PWM Controller for Flyback Converters
FEATURES
APPLICATIONS
flyback power converters, such as
TYPICAL APPLICATION
© System General Corp.
Version 1.2.1(IAO33.0067.B2)
General-purpose switching mode power supplies and
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
V
Gate Output Voltage Clamped at 17V
Low Cost
Few External Components Required
Small SOT-26 and Dip 8 Packages
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 other
auxiliary supplies, home appliances, and consumer
electronics
Replacements for linear transformers and RCC
SMPS
PC 5V standby power.
DD
Over Voltage Protection (Auto Restart)
SG6859
- 1 -
DESCRIPTION
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 easily meet even the strictest power
conservation requirements.
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 (90V
ensures safe operation even during short-circuits.
damaged by supply over voltage, the SG6859’s output
driver is clamped at 17V. SG6859 controllers can be used
to improve the performance and reduce the production
cost of power supplies. The SG6859 is the best choice for
replacing linear and RCC-mode power adapters. It is
available in 8-pin DIP and 6-pin SOT-26 packages.
This highly integrated PWM controller provides
The BiCMOS fabrication process enables reducing
To protect the external power MOSFET from being
AC
www.sg.com.tw
to 264V
AC
). Pulse-by-pulse current limiting
Product Specification
• www.fairchildsemi.com
September 28,2007
SG6859

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SG6859DZ Summary of contents

Page 1

Low Cost Green-Mode PWM Controller for Flyback Converters 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 ...

Page 2

... M: Mask Version W: Week code A~Z=W1~W26 AAJMW : Lead Free Package T: D=DIP P: SG6859TP XXXXXXXXYWWV XXXXXXXX: Wafer Lot Y: Year; WW: Week V: Assembly Location ORDERING INFORMATION Part Number Pb-Free SG6859TZ SG6859DZ PIN DESCRIPTIONS Pin No. Name Type DIP-8(SOT-26) GATE 1 / (6) Driver Output VDD 2 / (5) Supply NC 3 SENSE ...

Page 3

Low Cost Green-Mode PWM Controller for Flyback Converters BLOCK DIAGRAM © System General Corp. Version 1.2.1(IAO33.0067.B2) Product Specification www.sg.com. • www.fairchildsemi.com SG6859 September 28, 2007 ...

Page 4

Low Cost Green-Mode PWM Controller for Flyback Converters ABSOLUTE MAXIMUM RATINGS Symbol Parameter V DC Supply Voltage * VDD V Input Voltage to FB Pin FB V Input Voltage to Sense Pin SENCE T Operating Junction Temperature J R Thermal ...

Page 5

Low Cost Green-Mode PWM Controller for Flyback Converters Feedback Input Section Symbol Parameter Z Input Impedance Output High Voltage FB-OPEN V FB Open-loop Trigger Level FB-OL t The delay time of FB pin Open Loop Protection D-OLP ...

Page 6

Low Cost Green-Mode PWM Controller for Flyback Converters TYPICAL CHARACTERISTICS Turn-On Threshold Voltage (V DD-ON 17.0 16.8 16.6 16.4 16.2 16.0 -40 -25 - Temperature (℃) Startup Current ( Temperature DD-ST 1.4 1.2 1.0 ...

Page 7

Low Cost Green-Mode PWM Controller for Flyback Converters Green-Mode Entry FB Voltage (V FB-N 3.2 3.0 2.8 2.6 2.4 2.2 -40 -25 - Temperature (℃) Leading-Edge Blanking Time (t LEB 340 330 320 310 300 290 ...

Page 8

Low Cost Green-Mode PWM Controller for Flyback Converters OPERATION DESCRIPTION SG6859 devices integrate many useful designs into one controller for low-power switch-mode power supplies. The following descriptions highlight some of the features of the SG6859 series. Start-up Current The start-up ...

Page 9

Low Cost Green-Mode PWM Controller for Flyback Converters Gate Output The SG6859 BiCMOS output stage is a fast totem pole gate driver. Cross conduction has been avoided to minimize heat dissipation, increase efficiency, and enhance reliability. The output driver is ...

Page 10

Low Cost Green-Mode PWM Controller for Flyback Converters REFERENCE CIRCUIT BD1 CX1 GND GATE VDD SENSE C6 R9 BOM Reference Component BD1 BD ...

Page 11

Low Cost Green-Mode PWM Controller for Flyback Converters PACKAGE INFORMATION 8 PINS - DIP ( Dimensions Millimeters Symbol Min 0.381 A2 3.175 9.017 E E1 6.223 ...

Page 12

Low Cost Green-Mode PWM Controller for Flyback Converters 6 PINS - SOT ( θ Dimensions Millimeters Symbol Min 0.90 b 0. ...

Page 13

Low Cost Green-Mode PWM Controller for Flyback Converters © System General Corp. Version 1.2.1(IAO33.0067.B2) Product Specification www.sg.com. • www.fairchildsemi.com SG6859 September 28, 2007 ...

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