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What is MC33374T?

This electronic component, produced by the manufacturer "Motorola Semiconductors", performs the same function as "(MC33369 - MC33374) High Voltage Off Line Power Switching Regulator".


MC33374T Datasheet PDF - Motorola Semiconductors

Part Number MC33374T
Description (MC33369 - MC33374) High Voltage Off Line Power Switching Regulator
Manufacturers Motorola Semiconductors 
Logo Motorola Semiconductors Logo 


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High Voltage Power
Switching Regulator
The MC33369 through MC33374 are monolithic high voltage power
switching regulators that combine the required converter functions with a unique
programmable state controller, allowing a simple and economical powersystem
solution for office automation, consumer, and industrial products. These devices
are designed to operate directly from a rectified AC line source, and in flyback
converter applications are capable of providing an output power in excess of
150 W with a fixed AC input of 100 V, 115 V, or 230 V, and in excess of 90 W
with a variable AC input that ranges from 85 V to 265 V.
This device series features a programmable state controller, an on–chip
700 V SENSEFETpower switch circuit, 700 V active off–line startup circuit
including a high voltage JFET and a low voltage MOSFET, auto restart logic,
fixed frequency duty cycle controlled oscillator, current limiting comparator
with leading edge blanking, latching pulse width modulator for double pulse
suppression, and a high gain amplifier with a bandgap reference. Protective
features include cycle–by–cycle current limiting, input undervoltage lockout
with hysteresis, and a non–latching thermal shutdown. These devices are
available in economical 8–pin dual–in–line and five pin TO–220 style
packages.
Programmable State Controller
On–Chip 700 V SENSEFET Power Switch Circuit
Rectified AC Line Source Operation from 85 V to 265 V
On–Chip 700 V Active Off–Line Start–Up Circuit
Latching PWM for Double Pulse Suppression
Cycle–By–Cycle Current Limiting
Input Undervoltage Lockout with Hysteresis
Non–Latching Internal Thermal Shutdown
Enhanced Functionality Over TOP200 and TOP221 Series
Typical Application
AC
Input
Feedback
+
Snubber
Aux
Power
Supply
+
Power
5 Switch Pin
+
+ DC
Output
VCC Startup Circuit
1
State Control
Input
Feedback
Input
2
Programmable
State Controller
Pulse Width Modulator
Controller
Power
Switch
Circuit
4
On/Off
+ Ground 3
This device contains 391 active transistors.
Order this document by MC33370/D
MC33369
thru
MC33374
HIGH VOLTAGE
OFF–LINE POWER
SWITCHING REGULATOR
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 626
Pin 1. VCC
2. Feedback Input
3. Ground
4. State Control Input
8
1
5. Power Switch Pin
6. Ground
7. Ground
8. Ground
T SUFFIX
PLASTIC PACKAGE
CASE 314D
1
5
TV SUFFIX
PLASTIC PACKAGE
CASE 314E
1
5
Pin 1. VCC
2. Feedback Input
3. Ground
4. State Control Input
5. Power Switch Pin
Heatsink surface connected to Pin 3
ORDERING INFORMATION
Device
MC33369P
MC33370P
MC33371P
MC33372P
MC33373AP
MC33369T
MC33370T
MC33371T
MC33372T
MC33373T
MC33374T
MC33369TV
MC33370TV
MC33371TV
MC33372TV
MC33373TV
MC33374TV
Power Switch Circuit
On Peak
Resistance Current
(W) (A)
12 0.5
12 0.9
6.8 1.5
4.8 2.0
4.0 2.5
12 0.5
12 0.9
6.8 1.5
4.8 2.0
3.8 2.7
3.0 3.3
12 0.5
12 0.9
6.8 1.5
4.8 2.0
3.8 2.7
3.0 3.3
Package
Plastic
DIP–8
Straight
Lead
Vertical
Mount
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1999
Rev 3
1

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MC33374T equivalent
MC33369 thru MC33374
Figure 1. Oscillator Frequency Change
versus Temperature
120
www.DataSheet4U.com
110
Ifb = 4.0 mA
Figure 2. State Control Input Current
versus Input Voltage
3.0
Ifb = 4.0 mA
TA = 25°C
2.0
Input
Zener
Clamp
100 1.0
90
80
–50 –25
0 25 50 75 100 125 150
TC, CASE TEMPERATURE (°C)
0
–1.0
0
Input Open
Circuit Voltage
2.0
4.0
Input PNP
Transistor Clamp
6.0 8.0
Vin, STATE CONTROL INPUT VOLTAGE (V)
10
Figure 3. State Control Input Threshold
Voltage versus Temperature
4.6
Set Comparator Threshold, Vin Increasing Ifb = 4.0 mA
4.4
4.2
2.3
2.1 Toggle Comparator Hysteresis, Vin Increasing
1.9 Toggle Comparator Threshold, Vin Decreasing
1.7
–50 –25
0 25 50 75 100 125 150
TC, CASE TEMPERATURE (°C)
Figure 4. State Control Input Open Circuit
and Clamp Voltages versus Temperature
11
Input Zener Clamp Voltage at 10 mA
9.0
5.7 Input PNP Clamp Voltage at 0.5 mA
5.3
3.6 Input Open Circuit Voltage
Ifb = 4.0 mA
3.5
–50 –25 0 25 50 75 100 125 150
TC, CASE TEMPERATURE (°C)
Figure 5. Power Switch Circuit Output Duty Cycle
versus Feedback Input Current
80
Threshold of Duty Cycle Reduction
60
Pin 1 Connected to Pin 2
TA = 25°C
40
MC33369/
MC33370
MC33374
20
Power Supply Current
After UVLO Turn–On
0
0 2.0 4.0 6.0 8.0 10
IFB, FEEDBACK INPUT CURRENT (mA)
Figure 6. Feedback Input Current
versus Input Voltage
100
Pin 1 Connected to Pin 2
TA = 25°C
80
60
40
Input
Resistance
DVFB
DIFB
20
0
0 2.0 4.0 6.0 8.0 10
VFB, FEEDBACK INPUT VOLTAGE (V)
12
MOTOROLA ANALOG IC DEVICE DATA
5


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