MOTOROLA MC34261DR2, MC33261P, MC33261D, MC33261DR2 Datasheet

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SEMICONDUCTOR

TECHNICAL DATA

POWER FACTOR

CONTROLLERS

PIN CONNECTIONS

Order this document by MC34261/D

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SO–8)

P SUFFIX

PLASTIC PACKAGE

CASE 626

Voltage Feedback

Input

1 2 3 4

8 7 6 5

(Top View)

Compensation Multiplier Input

Current Sense

Input

CC Drive Output Gnd

Zero Current

Detect Input

Device

Operating

Temperature Range

Package

ORDERING INFORMATION

MC34261D MC34261P

TA = 0° to +70°C

SO–8

Plastic DIP MC33261D MC33261P

SO–8

Plastic DIP

TA = –40° to +85°C

MOTOROLA ANALOG IC DEVICE DATA

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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

Simplified Block Diagram

Voltage Feedback Input

Multiplier,

Latch, PWM, Timer,

Logic

ref

Error Amp

Multiplier

Undervoltage

Lockout

2.5V

Reference

Zero Current Detector

Drive Output

Gnd

Zero Current Detect Input

Multiplier

Input

Compensation

Current Sense

Input

 Motorola, Inc. 1996 Rev 1

MC34261 MC33261

MOTOROLA ANALOG IC DEVICE DATA

MAXIMUM RATINGS

Rating Symbol Value Unit

Total Power Supply and Zener Current (ICC + IZ) 30 mA Output Current, Source or Sink (Note 1) I

500 mA

Current Sense, Multiplier, and Voltage Feedback Inputs V

–1.0 to 10 V

Zero Current Detect Input

High State Forward Current Low State Reverse Current

50 –10

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

θJA

800 100

450 178

°C/W

Operating Junction Temperature T

+150 °C

Operating Ambient Temperature (Note 3)

MC34261 MC33261

0 to +70

–40 to +85

°C

Storage Temperature T

stg

–55 to +150 °C

ELECTRICAL CHARACTERISTICS (V

= 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 = T

low

to T

high

(VCC = 12 V to 28 V)

2.465

2.44

2.5 2.535

2.54

Line Regulation (VCC = 12 V to 28 V, TA = 25°C) Reg

line

– 1.0 10 mV

Input Bias Current (VFB = 0 V) I

– –0.3 –1.0 µA

Open Loop Voltage Gain A

VOL

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

Source

= 0.2 mA, VFB = 2.3 V)

Low State (I

Sink

= 0.4 mA, VFB = 2.7 V)

5.0 –

5.7

2.1

–

2.44

MULTIPLIER

Dynamic Input Voltage Range

Multiplier Input (Pin 3) Compensation (Pin 2)

Pin 3

Pin 2

0 to 2.5

VFB to

(VFB + 1.0)

0 to 3.5 VFB to

(VFB + 1.5)

– –

Input Bias Current (VFB = 0 V) I

– –0.3 –1.0 µA

Multiplier Gain (V

Pin 3

= 0.5 V , V

Pin 2

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

ZERO CURRENT DETECTOR

Input Threshold Voltage (Vin Increasing) V

1.3 1.6 1.8 V

Hysteresis (Vin Decreasing) V

40 110 200 mV

Input Clamp Voltage

High State (I

DET

= 3.0 mA)

Low State (I

DET

= –3.0 mA)

6.1

0.3

6.7

0.7

–

1.0

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

3. T

low

= –40°C for MC34261

3. T

low

= –40°C for MC33261

high

= +70°C for MC34261

high

= +85°C for MC33261

Pin 4 Threshold Voltage

Pin 3(VPin 2

– VFB)

2. K =

MC34261 MC33261

MOTOROLA ANALOG IC DEVICE DATA

ELECTRICAL CHARACTERISTICS (V

= 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

CURRENT SENSE COMPARATOR

Input Bias Current (V

Pin 4

= 0 V) I

– –0.5 –2.0 µA

Input Offset Voltage (V

Pin 2

= 1.1 V , V

Pin 3

= 0 V) V

– 3.5 15 mV

Delay to Output t

PHL (in/out)

– 200 400 ns

DRIVE OUTPUT

Output Voltage (VCC = 12 V)

Low State (I

Sink

= 20 mA)

Low State (I

Sink

= 200 mA)

High State (I

Source

= 20 mA)

High State (I

Source

= 200 mA)

–

1.8

9.8

7.8

0.3

2.4

10.3

8.3

0.8

3.3 –

8.8

Output Voltage (VCC = 30 V)

High State (I

Source

= 20 mA, CL = 15 pF)

O(max)

14 16 18

Output Voltage Rise T ime (CL = 1.0 nF) t

– 50 120 ns

Output Voltage Fall T ime (CL = 1.0 nF) t

– 50 120 ns

Output Voltage with UVLO Activated (VCC = 7.0 V , I

Sink

= 1.0 mA) V

OH(UVLO)

– 0.2 0.8 V

RESTART TIMER

Restart Time Delay t

DLY

150 400 – µs

UNDERVOLTAGE LOCKOUT

Startup Threshold (VCC Increasing) V

9.2 10.0 10.8 V

Minimum Operating Voltage After Turn–On (VCC Decreasing) V

Shutdown

7.0 8.0 9.0 V

Hysteresis V

1.75 2.0 2.5 V

TOTAL DEVICE

Power Supply Current

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

– – –

0.3

7.1

9.0

0.5

12 20

Power Supply Zener Voltage V

30 36 – V

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

3. T

low

= –40°C for MC34261

3. T

low

= –40°C for MC33261

high

= +70°C for MC34261

high

= +85°C for MC33261

Pin 4 Threshold Voltage

Pin 3(VPin 2

– VFB)

2. K =

, CURRENT SENSE THRESHOLD VOLTAGE (V)

1.0 1.5

, CURRENT SENSE THRESHOLD VOLTAGE (V)

VM, MULTIPLIER INPUT VOLTAGE (V)

–0.5 4.0

Figure 1. Current Sense Input Threshold

versus Multiplier Input

Figure 2. Current Sense Input Threshold

versus Multiplier Input

–0.12

VM, MULTIPLIER INPUT VOLTAGE (V)

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

3.0

–0.5

0.16

–0.02

2.5

2.0

1.5

1.0

0.5

0.14

0.12

0.10

0.08

0.06

0.04

0.02

See Figure 2

MC34261 MC33261

MOTOROLA ANALOG IC DEVICE DATA

Figure 3. Voltage Feedback Input Threshold

Change versus Temperature

0 0.5 1.0 1.5

Sink

, OUTPUT SINK CURRENT (mA)

sat

, OUTPUT SA TURATION VOLTAGE (V)

Figure 4. Error Amp Open Loop Gain and

Phase versus Frequency

Gain

Phase

VOL

, OPEN LOOP VOL TAGE GAIN (dB)

100

–20

f, FREQUENCY (Hz)

100 1.0 k 10 k 100 k 1.0 M 10 M

, EXCESS PHASE ( C)

120

180

150

Figure 5. Error Amp Small Signal

Transient Response

, VOLTAGE FEEDBACK THRESHOLD CHANGE (mV)

+4.0

–55

TA, AMBIENT TEMPERATURE (

–4.0

–8.0

–12

–16

–25 0 25 50 75 100 125

∆

Figure 6. Error Amp Large Signal

Transient Response

Figure 7. Error Amp Output Saturation

versus Sink Current

–55

TA, AMBIENT TEMPERATURE (°C)

–25 0 25 50 75 100 125

Figure 8. Restart Time Delay versus Temperature

DLY

, RESTART TIME DELAY ( s)

2.0

2.55 V

2.5 V

2.45 V

0.5

s/DIV

20 mV/DIV

VCC = 12 V

AV = –1.0 TA = 25

VCC = 12 V

AV = –1.0

TA = 25

200 mV/DIV

1.0 µs/DIV

3.0 V

2.5 V

2.0 V

VCC = 12 V

Pins 1 to 2

VCC = 12 V

VO = 3.0 V to 3.5 V

RL = 100 k TA = 25

5.0

4.0

3.0

2.0

1.0

525

475

425

375

325

275

VCC = 12 V

VFB = 2.7 V

TA = 25

VCC = 12 V

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