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
http://onsemi.com
8
1
PDIP−8
P SUFFIX
CASE 626
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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*
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
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
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Internal Thermal Protection
SMPS Controller
PIN CONNECTIONS
Demag
I
sense
Control Input
GND
1
2
3
4
(Top View)
8
7
6
5
V
CC
Driver
V
i
•
Pulsed Mode Techniques for a Very High Efficiency
Low Power Mode
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Lossless Startup
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Low dV/dT for Low EMI Radiations
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
©
Semiconductor Components Industries, LLC, 2006
May, 2006
−
Rev. 8
1
Publication Order Number:
MC44608/D
ONSEMI [ ON SEMICONDUCTOR ]
