Motorola MC34261P, MC34261D Datasheet

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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

 

POWER FACTOR

CONTROLLERS

SEMICONDUCTOR

TECHNICAL DATA

P SUFFIX

PLASTIC PACKAGE

8

1

8

1

CASE 626

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SO–8)

Multiplier

Input

Simplified Block Diagram

PIN CONNECTIONS

Voltage Feedback

Zero Current Detector

&

Undervoltage

Lockout

Error Amp

Compensation

V

2

2.5V

Reference

Multiplier,

Latch, PWM, Timer,

Logic

3

6

Gnd

Multiplier

ref

Zero Current Detect Input

5

V

CC

8

Drive Output

7

Current Sense

Input

4

Voltage Feedback

1

Input

Compensation Multiplier Input

Current Sense

ORDERING INFORMATION

Device

MC34261D MC34261P MC33261D MC33261P

1

Input

2 3 4

Input

(Top View)

Operating

Temperature Range

TA = 0° to +70°C

TA = –40° to +85°C

V

8

CC

Drive Output

7

Gnd

6

Zero Current

5

Detect Input

Package

Plastic DIP

SO–8

MOTOROLA ANALOG IC DEVICE DATA

 Motorola, Inc. 1996 Rev 1

1

MC34261 MC33261

MAXIMUM RATINGS

Rating Symbol Value Unit

Total Power Supply and Zener Current (ICC + IZ) 30 mA Output Current, Source or Sink (Note 1) I Current Sense, Multiplier, and V oltage Feedback Inputs V Zero Current Detect Input

High State Forward Current Low State Reverse Current

Power Dissipation and Thermal Characteristics

P Suffix, Plastic Package Case 626

Maximum Power Dissipation @ TA = 70°C Thermal Resistance, Junction–to–Air

R

D Suffix, Plastic Package Case 626

Maximum Power Dissipation @ TA = 70°C Thermal Resistance, Junction–to–Air

R Operating Junction Temperature T Operating Ambient Temperature (Note 3)

MC34261 MC33261

Storage Temperature T

O

I

in

P

θJA

P

θJA

T

stg

in

D

J

A

500 mA

–1.0 to 10 V

50 –10

800 100

450 178

+150 °C

0 to +70

–40 to +85

–55 to +150 °C

mA

mW

°C/W

mW

°C/W

°C

ELECTRICAL CHARACTERISTICS (V

= 12 V, for typical values TA = 25°C, for min/max values TA is the operating ambient

CC

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 = T

low

to T

(VCC = 12 V to 28 V)

high

Line Regulation (VCC = 12 V to 28 V, TA = 25°C) Reg Input Bias Current (VFB = 0 V) I Open Loop Voltage Gain A

V

FB

IB

VOL

line

2.465

2.44

2.5 2.535

2.54 – 1.0 10 mV – –0.3 –1.0 µA

65 85 – dB Gain Bandwidth Product (TA = 25°C) GBW 0.7 1.0 – MHz Output Source Current (VO = 4.0 V, VFB = 2.3 V) I

Source

0.25 0.5 0.75 mA

Output Voltage Swing

High State (I Low State (I

= 0.2 mA, VFB = 2.3 V)

Source

= 0.4 mA, VFB = 2.7 V)

Sink

V

OH

V

OL

5.0 –

2.1

5.7

–

2.44

MULTIPLIER

Dynamic Input Voltage Range

Multiplier Input (Pin 3) Compensation (Pin 2)

Input Bias Current (VFB = 0 V) I Multiplier Gain (V

Pin 3

= 0.5 V, V

= VFB + 1.0 V) (Note 2) K 0.4 0.62 0.8 1/V

Pin 2

V V

Pin 3 Pin 2

IB

0 to 2.5

VFB to

(VFB + 1.0)

0 to 3.5

VFB to

(VFB + 1.5)

– –

– –0.3 –1.0 µA

ZERO CURRENT DETECTOR

Input Threshold Voltage (Vin Increasing) V Hysteresis (Vin Decreasing) V

th H

1.3 1.6 1.8 V

40 110 200 mV

Input Clamp Voltage

High State (I Low State (I

NOTES: 1. Maximum package power dissipation limits must be observed.

2. K =

3. T

low

3. T

low

= 3.0 mA)

DET

= –3.0 mA)

DET

Pin 4 Threshold Voltage

V

Pin 3(VPin 2

= –40°C for MC34261 = –40°C for MC33261

– VFB)

T

= +70°C for MC34261

high

T

= +85°C for MC33261

high

V

IH

V

IL

6.1

0.3

6.7

0.7

–

1.0

V

2

MOTOROLA ANALOG IC DEVICE DATA

MC34261 MC33261

ELECTRICAL CHARACTERISTICS (V

= 12 V, for typical values TA = 25°C, for min/max values TA is the operating ambient

CC

temperature range that applies [Note 3], unless otherwise noted.)

Characteristic

CURRENT SENSE COMPARATOR

Input Bias Current (V Input Offset Voltage (V Delay to Output t

= 0 V) I

Pin 4

Pin 2

= 1.1 V, V

= 0 V) V

Pin 3

PHL (in/out)

DRIVE OUTPUT

Output Voltage (VCC = 12 V)

Low State (I

High State (I

Output Voltage (VCC = 30 V)

High State (I

= 20 mA)

Sink

= 200 mA)

Sink

= 20 mA)

Source

= 200 mA)

Source

= 20 mA, CL = 15 pF)

Source

V

Output Voltage Rise T ime (CL = 1.0 nF) t Output Voltage Fall T ime (CL = 1.0 nF) t Output Voltage with UVLO Activated (VCC = 7.0 V, I

= 1.0 mA) V

Sink

OH(UVLO)

RESTART TIMER

Restart Time Delay t

UNDERVOLTAGE LOCKOUT

Startup Threshold (VCC Increasing) V Minimum Operating Voltage After Turn–On (VCC Decreasing) V Hysteresis V

TOTAL DEVICE

Power Supply Current

Startup (VCC = 7.0 V) Operating Dynamic Operating (50 kHz, CL = 1.0 nF)

Power Supply Zener Voltage V

NOTES: 1. Maximum package power dissipation limits must be observed.

Pin 4 Threshold Voltage

2. K = V

3. T

Pin 3(VPin 2

= –40°C for MC34261

low

= –40°C for MC33261

low

– VFB)

T

= +70°C for MC34261

high

T

= +85°C for MC33261

high

Symbol Min Typ Max Unit

IB

IO

– –0.5 –2.0 µA – 3.5 15 mV – 200 400 ns

V

OL

V

OH

O(max)

r f

–

1.8

9.8

7.8

0.3

2.4

10.3

8.3

0.8

3.3 –

8.8

14 16 18

– 50 120 ns – 50 120 ns

V

– 0.2 0.8 V

DLY

th

Shutdown

H

I

CC

Z

150 400 – µs

9.2 10.0 10.8 V

7.0 8.0 9.0 V

1.75 2.0 2.5 V

mA – – –

0.3

7.1

9.0

0.5 12 20

30 36 – V

Figure 1. Current Sense Input Threshold

versus Multiplier Input

3.0

2.5

2.0

1.5

1.0

0.5

0

, CURRENT SENSE THRESHOLD VOLTAGE (V)

CS

–0.5

V

–0.5 4.0

See Figure 2

1.0 1.5

VM, MULTIPLIER INPUT VOLTAGE (V)

MOTOROLA ANALOG IC DEVICE DATA

, CURRENT SENSE THRESHOLD VOLTAGE (V) V

CS

0.16

0.14

0.12

0.10

0.08

0.06

0.04

0.02

–0.02

–0.12

Figure 2. Current Sense Input Threshold

versus Multiplier Input

0

–0.08 0 0.04 0.08 0.120 0.5 2.0 2.5 3.0 3.5 –0.04

VM, MULTIPLIER INPUT VOLTAGE (V)

3

MC34261 MC33261

Figure 3. V oltage Feedback Input Threshold

Change versus T emperature

+4.0

VCC = 12 V

Pins 1 to 2

0

–4.0

–8.0

–12

, VOLTAGE FEEDBACK THRESHOLD CHANGE (mV)

FB

–16

V

–55

∆

–25 0 25 50 75 100 125

TA, AMBIENT TEMPERATURE (

Figure 5. Error Amp Small Signal

Transient Response

2.55 V

°

C)

VCC = 12 V

AV = –1.0

°

C

TA = 25

Figure 4. Error Amp Open Loop Gain and

100

80

60

40

20

, OPEN LOOP VOL TAGE GAIN (dB)

0

VOL

A

–20

10

3.0 V

100 1.0 k 10 k 100 k 1.0 M 10 M

Phase versus Frequency

VCC = 12 V

VO = 3.0 V to 3.5 V

Gain

f, FREQUENCY (Hz)

RL = 100 k

°

C

TA = 25

Figure 6. Error Amp Large Signal

Transient Response

VCC = 12 V

Phase

AV = –1.0

°

TA = 25

0

30

°

60

90

120

, EXCESS PHASE ( C)

φ

150

180

C

2.5 V

2.45 V

0.5

µ

Figure 7. Error Amp Output Saturation

versus Sink Current

5.0 VCC = 12 V

VFB = 2.7 V

4.0

3.0

2.0

1.0

, OUTPUT SA TURATION VOLTAGE (V)

sat

V

0

0 0.5 1.0 1.5

TA = 25

°

C

I

, OUTPUT SINK CURRENT (mA)

Sink

s/DIV

2.0

2.5 V

20 mV/DIV

2.0 V

525

µ

475

425

375

, RESTART TIME DELAY ( s)

325

DLY

t

275

1.0 µs/DIV

Figure 8. Restart Time Delay versus Temperature

VCC = 12 V

–55

–25 0 25 50 75 100 125

TA, AMBIENT TEMPERATURE (°C)

200 mV/DIV

4

MOTOROLA ANALOG IC DEVICE DATA

Motorola MC34261P, MC34261D Datasheet

Specifications and Main Features

Frequently Asked Questions

User Manual