Motorola MC34262D, MC34262P, MC33262D, MC33262P Datasheet

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The MC34262/MC33262 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 for stand–alone applications, a one quadrant multiplier for near unity power factor, zero current detector to ensure critical conduction operation, transconductance error amplifier, quickstart circuit for enhanced startup, 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 an overvoltage comparator to eliminate runaway output voltage due to load removal, input undervoltage lockout with hysteresis, cycle–by–cycle current limiting, multiplier output clamp that limits maximum peak switch current, an RS latch for single pulse metering, and a drive output high state clamp for MOSFET gate protection. These devices are available in dual–in–line and surface mount plastic packages.

• Overvoltage Comparator Eliminates Runaway Output Voltage

• Internal Startup Timer

• One Quadrant Multiplier

• Zero Current Detector

• Trimmed 2% Internal Bandgap Reference

• Totem Pole Output with High State Clamp

• Undervoltage Lockout with 6.0 V of Hysteresis

• Low Startup and Operating Current

• Supersedes Functionality of SG3561 and TDA4817

Order this document by MC34262/D

 

POWER FACTOR

CONTROLLERS

SEMICONDUCTOR

TECHNICAL DATA

PLASTIC PACKAGE

8

1

8

1

PLASTIC PACKAGE

P SUFFIX

CASE 626

D SUFFIX

CASE 751

(SO–8)

Multiplier

Input

PIN CONNECTIONS

Simplified Block Diagram

Zero Current Detector

2.5V

Reference

Multiplier,

Latch, PWM, Timer,

Logic

3

6

Gnd

Multiplier

Undervoltage

Lockout

&

Compensation

Error Amp

2

Overvoltage Comparator

+

1.08 V

+

Quickstart

ref

V

ref

Zero Current Detect Input

5

V

CC

8

Drive Output

7

Current Sense Input

4

Voltage Feedback

1

Input

Voltage Feedback

Compensation Multiplier Input

Current Sense

ORDERING INFORMATION

Device

MC34262D MC34262P MC33262D MC33262P

1

Input

2 3 4

Input

(Top View)

Operating

Temperature Range

TA = 0° to +85°C

TA = –40° to +105°C

V

8

CC

7

Drive Output Gnd

6

Zero Current

5

Detect Input

Package

Plastic DIP

SO–8

MOTOROLA ANALOG IC DEVICE DATA

 Motorola, Inc. 1996 Rev 1

1

MC34262 MC33262

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

D Suffix, Plastic Package, Case 751

Maximum Power Dissipation @ TA = 70°C

Thermal Resistance, Junction–to–Air Operating Junction Temperature T Operating Ambient Temperature (Note 3)

MC34262 MC33262

Storage Temperature T

R

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 + 85

– 40 to +105 – 65 to +150 °C

mA

mW

°C/W

mW

°C/W

°C

ELECTRICAL CHARACTERISTICS (V

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

Characteristic

ERROR AMPLIFIER

Voltage Feedback Input Threshold

TA = 25°C

TA = T Line Regulation (VCC = 12 V to 28 V, TA = 25°C) Reg Input Bias Current (VFB = 0 V) I Transconductance (TA = 25°C) g Output Current

Source (VFB = 2.3 V)

Sink (VFB = 2.7 V) Output Voltage Swing

High State (VFB = 2.3 V)

Low State (VFB = 2.7 V)

OVERVOLTAGE COMPARATOR

Voltage Feedback Input Threshold V

MULTIPLIER

Input Bias Current, Pin 3 (VFB = 0 V) I Input Threshold, Pin 2 V Dynamic Input Voltage Range

Multiplier Input (Pin 3)

Compensation (Pin 2)

Multiplier Gain (V

ZERO CURRENT DETECTOR

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

High State (I

Low State (I

low

to T

DET

(VCC = 12 V to 28 V)

high

= 0.5 V, V

Pin 3

= + 3.0 mA)

= – 3.0 mA)

Pin 2

= 12 V (Note 2), for typical values TA = 25°C, for min/max values TA is the operating ambient

CC

V

= V

+ 1.0 V) (Note 4) K 0.43 0.65 0.87 1/V

th(M)

Symbol Min Typ Max Unit

V

FB

line

IB

m

I

O

OH(ea)

OL(ea)

FB(OV)

IB

th(M)

V

Pin 3

V

Pin 2

th

H

V

IH

V

IL

2.465

2.44 — 1.0 10 mV — –0.1 – 0.5 µA 80 100 130 µmho

— —

5.8 —

1.065 V

FB

— –0.1 – 0.5 µA

1.05 V

OL(EA)

0 to 2.5

V

to

th(M)

(V

+ 1.0)

th(M)

1.33 1.6 1.87 V 100 200 300 mV

6.1

0.3

1.08 V

1.2 V

V

(V

th(M)

2.5 —

10 10

6.4

1.7

OL(EA)

0 to 3.5

th(M)

+ 1.5)

6.7

0.7

FB

to

2.535

2.54

— —

—

2.4

1.095 V

— V

— —

—

1.0

FB

V

µA

V

2

MOTOROLA ANALOG IC DEVICE DATA

MC34262 MC33262

.

ELECTRICAL CHARACTERISTICS (V

= 12 V (Note 2), 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

= 0 V) I

Pin 4

Pin 2

= 1.1 V, V

= 0 V) V

Pin 3

Maximum Current Sense Input Threshold (Note 5) V Delay to Output t

DRIVE OUTPUT

Output Voltage (VCC = 12 V)

Low State (I

High State (I

= 20 mA)

Sink

= 200 mA)

Sink Source Source

= 20 mA) = 200 mA)

Output Voltage (VCC = 30 V) High State (I

= 20 mA, CL = 15 pF)

Source

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

Sink

= 1.0 mA)

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 (ICC = 25 mA) V

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

2.Adjust VCC above the startup threshold before setting to 12 V.

3. T

=0°C for MC34262

low

3. T

=–40°C for MC33262

low

T

=+85°C for MC34262

high

T

= +105°C for MC33262

high

Symbol Min Typ Max Unit

IB

IO

th(max)

PHL(in/out)

V

OL

V

OH

V

O(max)

r f

V

O(UVLO)

DLY

th(on)

Shutdown

H

I

CC

Z

— – 0.15 –1.0 µA — 9.0 25 mV

1.3 1.5 1.8 V — 200 400 ns

— —

9.8

7.8

0.3

2.4

10.3

8.4

0.8

3.3 — —

14 16 18 — 50 120 ns — 50 120 ns — 0.1 0.5 V

200 620 — µs

11.5 13 14.5 V

7.0 8.0 9.0 V

3.8 5.0 6.2 V

— — —

0.25

6.5

9.0

0.4 12 20

30 36 — V

4. K =

5.This parameter is measured with VFB = 0 V, and V

Pin 4 Threshold

V

(V

Pin 3

Pin 2

– V

th(M)

)

Pin 3

V

mA

= 3.0 V

Figure 1. Current Sense Input Threshold

versus Multiplier Input

1.6 VCC = 12 V

1.4

TA = 25

°

C

1.2

1.0

0.8

0.6

0.4

0.2

, CURRENT SENSE PIN 4 THRESHOLD (V)

0

CS

V

1.4– 0.2 3.80.6 2.2 3.0

VM, MULTIPLIER PIN 3 INPUT VOLTAGE (V)

MOTOROLA ANALOG IC DEVICE DATA

V

Pin 2

= 2.0 V

, CURRENT SENSE PIN 4 THRESHOLD (V) V

CS

0.08

0.07

0.06

0.05

0.04

0.03

0.02

0.01

– 0.12

Figure 2. Current Sense Input Threshold

versus Multiplier Input, Expanded View

V

= 3.5 V

Pin 2

V

= 3.25 V

Pin 2

0

– 0.06 0.06 0.12 0.18 0.240

VM, MULTIPLIER PIN 3 INPUT VOLTAGE (V)

VCC = 12 V TA = 25

V

Pin 2

°

C

= 2.0 V

3

MC34262 MC33262

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)

–16

FB

–55

V

∆

– 25 0 25 50 75 100 125

TA, AMBIENT TEMPERATURE (

Figure 5. Error Amp Transconductance and

Phase versus Frequency

120

100

µ

Phase

Transconductance

80

°

C)

VCC = 12 V VO = 2.5 V to 3.5 V RL = 100 k to 3.0 V CL = 2.0 pF

°

C

TA = 25

0

30

60

Figure 4. Overvoltage Comparator Input

FB

110

109

108

107

, OVERVOLTAGE INPUT THRESHOLD (%V )

106

–55

FB(OV)

V

Threshold versus T emperature

– 25 0 25 50 75 100

Figure 6. Error Amp Transient Response

4.00 V

TA, AMBIENT TEMPERATURE (

VCC = 12 V

°

C)

VCC = 12 V RL = 100 k CL = 2.0 pF TA = 25

125

°

C

60

40

20

, TRANSCONDUCTANCE ( mho)

m

g

0

3.0 k 10 k 30 k 100 k 300 k 1.0 M 3.0 M f, FREQUENCY (Hz)

Figure 7. Quickstart Charge Current

versus T emperature

1.80 VCC = 12 V

1.76

1.72

Voltage

1.68

, QUICKSTAR T CHARGE VOLTAGE (V)

chg

V

1.64

– 55 – 25 0 25 50 75 100 125

TA, AMBIENT TEMPERATURE (°C)

Current

90

120

150

180

900

800

700

600

500

3.25 V

, EXCESS PHASE (DEGREES)

O

2.50 V

800

µ

700

600

, RESTART TIME DELAY ( s)

500

DLY

t

, QUICKSTART CHARGE CURRENT ( A)

chg

I

400

–55

5.0 µs/DIV

Figure 8. Restart Timer Delay

versus T emperature

VCC = 12 V

– 25 0 25 50 75 100 125

TA, AMBIENT TEMPERATURE (

°

C)

0.75 V/DIV

4

MOTOROLA ANALOG IC DEVICE DATA

MC34262 MC33262

1.7

1.6

1.5

, THRESHOLD VOLTAGE (V)

1.4

th

V

1.3

90%

Figure 9. Zero Current Detector Input

Threshold V oltage versus Temperature

Upper Threshold (Vin, Increasing)

Lower Threshold

(Vin, Decreasing)

– 25 0 25 50 75 100 125

–55

TA, AMBIENT TEMPERATURE (

°

Figure 11. Drive Output Waveform

VCC = 12 V

C)

VCC = 12 V CL = 1.0 nF

TA = 25

Figure 10. Output Saturation Voltage

versus Load Current

0

– 2.0

– 4.0

– 6.0

4.0

2.0

, OUTPUT SA TURATION VOLTAGE (V)

sat

V

0

0 80 160 240 320

Source Saturation

(Load to Ground)

Sink Saturation

(Load to VCC)

V

CC

Gnd

IO, OUTPUT LOAD CURRENT (mA)

VCC = 12 V

µ

s Pulsed Load

80 120 Hz Rate

Figure 12. Drive Output Cross Conduction

VCC = 12 V

CL = 15 pF

°

C

°

C

, OUTPUT VOL TAGE

O

TA = 25

5.0 V/DIV100 mA/DIV

10%

100 ns/DIV 100 ns/DIV

Figure 13. Supply Current

versus Supply V oltage

16

12

8.0 VFB = 0 V

, SUPPLY CURRENT (mA)

4.0

CC

I

0

0 10203040

V

, SUPPLY VOLTAGE (V)

CC

Current Sense = 0 V Multiplier = 0 V CL = 1.0 nF f = 50 kHz

°

C

TA = 25

, SUPPLY CURRENT V

CC

I

Figure 14. Undervoltage Lockout Thresholds

versus T emperature

14 13 12 11 10

, SUPPLY VOLTAGE (V)

9.0

CC

V

8.0

7.0 – 55 – 25 0 25 50 75 100 125

Startup Threshold

(VCC Increasing)

Minimum Operating Threshold

(VCC Decreasing)

TA, AMBIENT TEMPERATURE (°C)

MOTOROLA ANALOG IC DEVICE DATA

5