MC44608_06 Datasheet, PDF (1/15 Pages) ON Semiconductor – Few External Components Reliable and Flexible SMPS Controller

MC44608
Few External Components
Reliable and Flexible
SMPS Controller
The MC44608 is a high performance voltage mode controller
designed for off−line converters. This high voltage circuit that
integrates the startup current source and the oscillator capacitor,
requires few external components while offering a high flexibility and
reliability.
The device also features a very high efficiency standby management
consisting of an effective Pulsed Mode operation. This technique
enables the reduction of the standby power consumption to
approximately 1.0 W while delivering 300 mW in a 150 W SMPS.
General Features
• Integrated Startup Current Source
• Lossless Off−Line Startup
• Direct Off−Line Operation
• Fast Startup
• Flexibility
• Duty Cycle Control
• Undervoltage Lockout with Hysteresis
• On Chip Oscillator Switching Frequency 40 or 75
• Secondary Control with Few External Components
• Pb−Free Packages are Available*
Protections
• Maximum Duty Cycle Limitation
• Cycle by Cycle Current Limitation
• Demagnetization (Zero Current Detection) Protection
• “Over V_CC Protection” Against Open Loop
• Programmable Low Inertia Over Voltage Protection
Against Open Loop
• Internal Thermal Protection
SMPS Controller
• Pulsed Mode Techniques for a Very High Efficiency
Low Power Mode
• Lossless Startup
• Low dV/dT for Low EMI Radiations
http://onsemi.com
8
1
PDIP−8
P SUFFIX
CASE 626
MARKING DIAGRAM
8
MC44608Pxx
AWL
YYWWG
1
MC44608Pxx
A
WL
YY
WW
G
= Device Code
xx = 40 or 75
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
Demag 1
I_sense 2
Control Input 3
GND 4
8 V_i
7
6 _VCC
5 Driver
(Top View)
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2006
1
May, 2006 − Rev. 8
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
Publication Order Number:
MC44608/D