MC44608
Few External Components
Reliable and Flexible
GreenLine
™
Very High Voltage
PWM Controller
The MC44608 is a high performance voltage mode controller
designed for off–line converters. This high voltage circuit that
integrates the start–up 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 stand–by
management consisting of an effective Pulsed Mode operation. This
technique enables the reduction of the stand–by power consumption to
approximately 1W while delivering 300mW in a 150W SMPS.
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Integrated Start–Up Current Source
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Lossless Off–Line Start–Up
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Direct Off–Line Operation
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Fast Start–Up
General Features
http://onsemi.com
8
1
DIP–8
P SUFFIX
CASE 626
PIN CONNECTIONS AND
MARKING DIAGRAM
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Flexibility
Duty Cycle Control
Undervoltage Lockout with Hysteresis
On Chip Oscillator Switching Frequency 40, or 75kHz
Secondary Control with Few External Components
Maximum Duty Cycle Limitation
Cycle by Cycle Current Limitation
Demagnetization (Zero Current Detection) Protection
“Over VCC Protection” Against Open Loop
Programmable Low Inertia Over Voltage Protection Against Open Loop
Internal Thermal Protection
Demag
Isense
Control Input
Gnd
1
8
Vi
3
4
44608Pxxx
AWL
YYWW
2
7
6
5
Vcc
Driver
Protections
AWL = Manufacturing Code
YYWW = Date Code
(Top View)
ORDERING INFORMATION
Device
Switching Package
Frequency
40kHz
75kHz
Plastic
DIP–8
Plastic
DIP–8
Shipping
GreenLine™ Controller
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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
MC44608P40
MC44608P75
50 / Rail
50 / Rail
©
Semiconductor Components Industries, LLC, 1999
1
January, 2000 – Rev. 2
Publication Order Number:
MC44608/D
ONSEMI [ ON SEMICONDUCTOR ]
