44608P40 반도체 회로 부품 판매점
MC44608
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 ON Semiconductor |
www.DataSheet4U.com
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.
• Integrated Start–Up Current Source
• Lossless Off–Line Start–Up
• Direct Off–Line Operation
• Fast Start–Up
General Features
• Flexibility
• Duty Cycle Control
• Undervoltage Lockout with Hysteresis
• On Chip Oscillator Switching Frequency 40, or 75kHz
• Secondary Control with Few External Components
Protections
• 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
GreenLine™ 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
DIP–8
P SUFFIX
CASE 626
PIN CONNECTIONS AND
MARKING DIAGRAM
Demag 1
Isense 2
Control Input 3
Gnd 4
8 Vi
7
6 Vcc
5 Driver
AWL = Manufacturing Code
YYWW = Date Code
(Top View)
ORDERING INFORMATION
Device
MC44608P40
Switching Package Shipping
Frequency
40kHz
Plastic 50 / Rail
DIP–8
MC44608P75
75kHz
Plastic 50 / Rail
DIP–8
© Semiconductor Components Industries, LLC, 1999
January, 2000 – Rev. 2
1
Publication Order Number:
MC44608/D
www.DataSheet4U.com
MC44608
REPRESENTATIVE BLOCK DIAGRAM
Demag
Vi
DMG +
– 50 mV
/20 mV
1
>24 m A >120 m A
UVLO2
8
9 mA
Start–up
Source
1
S1
2
Isense
Demag
Logic
Output
Latched off
Phase
Start–up
Phase
200 m A
Switching
Phase
0
Start–up
Phase
Latched off Phase
Start–up Phase
Switching Phase
VCC
Management
OVP
2 m S UVLO1
UVLO2
&
OUT Disable
DMG
&
Stand–by Stand–by
Management
OSC
Enable
OSC
OC NOC
Leading Edge
Blanking
Output
&
Clock
+
PWM
–
VPWM
&
&
Thermal
S Shutdown
PWM
Latch
RQ
Buffer
+
CS
–
1V
4 kHz Filter
Latched off Phase
Stand–by
&
Regulation
S2
S3
Block
Switching Phase
6
VCC
5
Driver
4
GND
3
Control
Input
MAXIMUM RATINGS
Rating
Total Power Supply Current
Output Supply Voltage with Respect to Ground
All Inputs except Vi
Line Voltage
Power Dissipation and Thermal Characteristics
Maximum Power Dissipation at TA = 85°C
Thermal Resistance, Junction–to–Air
Operating Junction Temperature
Operating Ambient Temperature
Symbol
ICC
VCC
Vinputs
Vi
PD
RθJA
TJ
TA
Value
30
16
–1.0 to +16
500
600
100
150
–25 to +85
Unit
mA
V
V
V
mW
°C/W
°C
°C
http://onsemi.com
2
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( onsemi )
44608P40 data
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