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MC33261 Datasheet

(MC33261 / MC34261) POWER FACTOR CONTROLLERS

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Power Factor Controllers
The MC34261/MC33261 are active power factor controllers specifically
designed for use as a preconverter in electronic ballast and in off–line 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, cycle–by–cycle current limiting, and a latch for single
pulse metering. These devices are available in dual–in–line 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
Order this document by MC34261/D
MC34261
MC33261
POWER FACTOR
CONTROLLERS
SEMICONDUCTOR
TECHNICAL DATA
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
Simplified Block Diagram
Zero Current Detector
2.5V
Reference
Undervoltage
Lockout
Zero Current
5 Detect Input
VCC
8
PIN CONNECTIONS
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)
Multiplier
Input 3
Gnd 6
Multiplier,
Latch,
PWM,
Timer,
&
Logic
Drive Output
7
Current Sense
4 Input
Multiplier
Error Amp Vref
Compensation 2
Voltage
Feedback
1 Input
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC34261D
MC34261P
TA = 0° to +70°C
SO–8
Plastic DIP
MC33261D
TA = – 40° to +85°C
MC33261P
SO–8
Plastic DIP
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 1
1


Motorola 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, Junction–to–Air
D Suffix, Plastic Package Case 626
Maximum Power Dissipation @ TA = 70°C
Thermal Resistance, Junction–to–Air
Operating Junction Temperature
Operating Ambient Temperature (Note 3)
MC34261
MC33261
PD
RθJA
PD
RθJA
TJ
TA
800 mW
100 °C/W
450
178
+150
0 to +70
–40 to +85
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
Symbol
Min
Typ
Max Unit
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)
VFB V
2.465 2.5 2.535
2.44 2.54
Regline
IIB
AVOL
GBW
65
0.7
1.0 10 mV
–0.3 –1.0 µA
85 – dB
1.0 – MHz
ISource
0.25
0.5
0.75 mA
V
VOH 5.0 5.7
VOL – 2.1 2.44
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)
VPin 3
VPin 2
IIB
K
0 to 2.5
0 to 3.5
VFB to
VFB to
(VFB + 1.0) (VFB + 1.5)
– –0.3
0.4 0.62
–1.0
0.8
V
µA
1/V
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)
Vth 1.3 1.6 1.8 V
VH 40 110 200 mV
V
VIH 6.1 6.7
VIL 0.3 0.7 1.0
NOTES: 1. Maximum package power dissipation limits must be observed.
Pin 4 Threshold Voltage
2. K =
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
2 MOTOROLA ANALOG IC DEVICE DATA


Part Number MC33261
Description (MC33261 / MC34261) POWER FACTOR CONTROLLERS
Maker Motorola
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MC33261 Datasheet PDF






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