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  ON Semiconductor Electronic Components Datasheet  

MC33261 Datasheet

(MC33261 / MC34261) Power Factor Controllers

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MC34261, MC33261
Power Factor Controllers
The MC34261/MC33261 are active power factor controllers
specifically designed for use as a preconverter in electronic ballast and
in offline power converter applications. These integrated circuits
feature an internal startup timer, a one quadrant multiplier for near
unity power factor, zero current detector to ensure critical conduction
operation, high gain error amplifier, trimmed internal bandgap
reference, current sensing comparator, and a totem pole output ideally
suited for driving a power MOSFET.
Also included are protective features consisting of input
undervoltage lockout with hysteresis, cyclebycycle current limiting,
and a latch for single pulse metering. These devices are available in
dualinline and surface mount plastic packages.
Internal Startup Timer
One Quadrant Multiplier
Zero Current Detector
Trimmed 2% Internal Bandgap Reference
Totem Pole Output
Undervoltage Lockout with Hysteresis
Low Startup and Operating Current
Pinout Equivalent to the SG3561
Functional Equivalent to the TDA4817
Simplified Block Diagram
http://onsemi.com
POWER FACTOR
CONTROLLERS
SEMICONDUCTOR
TECHNICAL DATA
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO8)
Zero Current Detector
Zero Current
5 Detect Input
PIN CONNECTIONS
2.5V
Reference
Undervoltage
Lockout
Multiplier
Input 3
Gnd 6
Multiplier,
Latch,
PWM,
Timer,
&
Logic
Multiplier
Error Amp Vref
Compensation 2
VCC
8
Drive Output
7
Current Sense
4 Input
Voltage
Feedback
1 Input
Voltage Feedback
Input
1
Compensation 2
8 VCC
7 Drive Output
Multiplier Input 3
Current Sense
Input
4
6 Gnd
5
Zero Current
Detect Input
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC34261D
MC34261P
TA = 0° to +70°C
SO8
Plastic DIP
MC33261D
MC33261P
TA = 40° to +85°C
SO8
Plastic DIP
© Semiconductor Components Industries, LLC, 2006
July, 2006 Rev. 3
1
Publication Order Number:
MC34261/D


  ON Semiconductor Electronic Components Datasheet  

MC33261 Datasheet

(MC33261 / MC34261) Power Factor Controllers

No Preview Available !

MC34261, MC33261
MAXIMUM RATINGS
Rating
Total Power Supply and Zener Current
Output Current, Source or Sink (Note 1)
Current Sense, Multiplier, and Voltage Feedback Inputs
Zero Current Detect Input
High State Forward Current
Low State Reverse Current
Symbol
(ICC + IZ)
IO
Vin
Iin
Value
30
500
1.0 to 10
50
10
Unit
mA
mA
V
mA
Power Dissipation and Thermal Characteristics
P Suffix, Plastic Package Case 626
Maximum Power Dissipation @ TA = 70°C
Thermal Resistance, JunctiontoAir
D Suffix, Plastic Package Case 626
Maximum Power Dissipation @ TA = 70°C
Thermal Resistance, JunctiontoAir
Operating Junction Temperature
Operating Ambient Temperature (Note 3)
MC34261
MC33261
PD
RθJA
PD
RθJA
TJ
TA
800
100
450
178
+150
0 to +70
40 to +85
mW
°C/W
mW
°C/W
°C
°C
Storage Temperature
Tstg
55 to +150
°C
ELECTRICAL CHARACTERISTICS (VCC = 12 V, for typical values TA = 25°C, for min/max values TA is the operating ambient
temperature range that applies [Note 3], unless otherwise noted.)
Characteristic
ERROR AMPLIFIER
Voltage Feedback Input Threshold
TA = 25°C
TA = Tlow to Thigh (VCC = 12 V to 28 V)
Line Regulation (VCC = 12 V to 28 V, TA = 25°C)
Input Bias Current (VFB = 0 V)
Open Loop Voltage Gain
Gain Bandwidth Product (TA = 25°C)
Output Source Current (VO = 4.0 V, VFB = 2.3 V)
Output Voltage Swing
High State (ISource = 0.2 mA, VFB = 2.3 V)
Low State (ISink = 0.4 mA, VFB = 2.7 V)
MULTIPLIER
Dynamic Input Voltage Range
Multiplier Input (Pin 3)
Compensation (Pin 2)
Input Bias Current (VFB = 0 V)
Multiplier Gain (VPin 3 = 0.5 V, VPin 2 = VFB + 1.0 V) (Note 2)
ZERO CURRENT DETECTOR
Input Threshold Voltage (Vin Increasing)
Hysteresis (Vin Decreasing)
Input Clamp Voltage
High State (IDET = 3.0 mA)
Low State (IDET = 3.0 mA)
NOTES: 1. Maximum package power dissipation limits must be observed.
2. K =
Pin 4 Threshold Voltage
VPin 3(VPin 2 VFB)
3. Tlow = 40°C for MC34261
3. Tlow = 40°C for MC33261
Thigh = +70°C for MC34261
Thigh = +85°C for MC33261
Symbol
VFB
Regline
IIB
AVOL
GBW
ISource
VOH
VOL
Min
2.465
2.44
65
0.7
0.25
5.0
Typ
2.5
1.0
0.3
85
1.0
0.5
5.7
2.1
Max
2.535
2.54
10
1.0
0.75
2.44
VPin 3
VPin 2
IIB
K
Vth
VH
VIH
VIL
0 to 2.5
VFB to
(VFB + 1.0)
0.4
0 to 3.5
VFB to
(VFB + 1.5)
0.3
0.62
1.3 1.6
40 110
6.1 6.7
0.3 0.7
1.0
0.8
1.8
200
1.0
Unit
V
mV
μA
dB
MHz
mA
V
V
μA
1/V
V
mV
V
http://onsemi.com
2


Part Number MC33261
Description (MC33261 / MC34261) Power Factor Controllers
Maker ON Semiconductor
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MC33261 Datasheet PDF






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