Motorola MC34067P, MC34067DW, MC33067P Datasheet

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Order this document by MC34067/D

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The MC34067/MC33067 are high performance zero voltage switch resonant mode controllers designed for off–line and dc–to–dc converter applications that utilize frequency modulated constant off–time or constant deadtime control. These integrated circuits feature a variable frequency oscillator, a precise retriggerable one–shot timer, temperature compensated reference, high gain wide bandwidth error amplifier, steering flip–flop, and dual high current totem pole outputs ideally suited for driving power MOSFETs.

Also included are protective features consisting of a high speed fault comparator and latch, programmable soft–start circuitry, input undervoltage lockout with selectable thresholds, and reference undervoltage lockout.

These devices are available in dual–in–line and surface mount packages.

• Zero Voltage Switch Resonant Mode Operation

• Variable Frequency Oscillator with a Control Range Exceeding 1000:1

• Precision One–Shot Timer for Controlled Of f–Time

• Internally Trimmed Bandgap Reference

• 4.0 MHz Error Amplifier

• Dual High Current Totem Pole Outputs

• Selectable Undervoltage Lockout Thresholds with Hysteresis

• Enable Input

• Programmable Soft–Start Circuitry

• Low Startup Current for Off–Line Operation

HIGH PERFORMANCE

ZERO VOLTAGE SWITCH

RESONANT MODE

CONTROLLERS

SEMICONDUCTOR

TECHNICAL DATA

P SUFFIX

PLASTIC PACKAGE

CASE 648

DW SUFFIX

PLASTIC PACKAGE

CASE 751G

(SO–16L)

16

1

16

1

Simplified Block Diagram

15

V

CC

Enable /

UVLO Adjust

Osc Charge

Osc RC

Oscillator

Control Current

One–Shot Error Amp

Output

Noninverting

Input

Inverting Input

Soft–Start

9 1 2

3

16

6 8

7

11

Error Amp

V

UVLO /

CC

Enable

Variable

Frequency

Oscillator

One–Shot

2.5 V

Clamp

5.0 V

Reference

Soft–Start

MOTOROLA ANALOG IC DEVICE DATA

V

ref

Steering

Flip–Flop

Fault Detector /

Ground4

UVLO

Latch

5

V

ref

14

Output A

12

Output B

13

Pwr Gnd

10

Fault Input

PIN CONNECTIONS

Osc Charge

Osc RC

Osc Control Current

Gnd

V

ref

Error Amp Out

Inverting Input

Noninverting Input

1 2 3 4 5 6 7 8

(Top View)

One–Shot RC

16

V

15

CC

Drive Output A

14

Power Gnd

13

Drive Output B

12

C

11

Soft–Start

Fault Input

10

Enable/UVLO

9

Adjust

ORDERING INFORMATION

Operating

Device

MC34067DW SO–16L MC34067P Plastic DIP

MC33067DW SO–16L MC33067P Plastic DIP

 Motorola, Inc. 1996 Rev 0

Temperature Range

TA = 0 to + 70°C

TA = – 40° to + 85°C

Package

1

MC34067 MC33067

MAXIMUM RATINGS

Rating Symbol Value Unit

Power Supply Voltage V Drive Output Current, Source or Sink (Note 1)

Continuous Pulsed (0.5 µs, 25% Duty Cycle

Error Amplifier, Fault, One–Shot, Oscillator and

Soft–Start Inputs UVLO Adjust Input V Power Dissipation and Thermal Characteristics

DW Suffix, Plastic Package, Case 751G

TA = 25°C Thermal Resistance, Junction–to–Air

P Suffix, Plastic Package, Case 648

TA = 25°C

Thermal Resistance, Junction–to–Air Operating Junction Temperature T Operating Ambient Temperature

MC34067 MC33067

Storage Temperature T

CC

I

O

V

in

in(UVLO)

P

D

R

θJA

P

D

R

θJA

J

T

A

stg

20 V

0.3

1.5

– 1.0 to + 6.0 V

– 1.0 to V

862 145

1.25 100

CC

mW

°C/W

W

°C/W

+ 150 °C

°C

0 to + 70

– 40 to + 85

– 55 to + 150 °C

A

V

ELECTRICAL CHARACTERISTICS (V

= 12 V [Note 2], R

CC

OSC

= 18.2 k, R

VFO

= 2940, C

= 300 pF, RT = 2370 k, CT = 300 pF,

OSC

CL = 1.0 nF. 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

REFERENCE SECTION

Reference Output Voltage (IO = 0 mA, TJ = 25°C) V Line Regulation (VCC = 10 TO 18 V) Reg Load Regulation (IO = 0 mA to 10 mA) Reg Total Output Variation Over Line, Load, and Temperature V Output Short Circuit Current I Reference Undervoltage Lockout Threshold V

ref

line

load ref O

th

5.0 5.1 5.2 V – 1.0 20 mV – 1.0 20 mV

4.9 – 5.3 V

25 100 190 mA

3.8 4.3 4.8 V

ERROR AMPLIFIER

Input Offset Voltage (VCM = 1.5 V) V Input Bias Current (VCM = 1.5 V) I Input Offset Current (VCM = 1.5 V) I Open Loop Voltage Gain (VCM = 1.5 V, VO = 2.0 V) A

IO IB

IO

VOL

– 1.0 10 mV – 0.2 1.0 µA – 0 0.5 µA

70 100 – dB Gain Bandwidth Product (f = 100 kHz) GBW 3.0 5.0 – MHz Input Common Mode Rejection Ratio (VCM = 1.5 to 5.0 V) CMR 70 95 – dB Power Supply Rejection Ratio (VCC = 10 to 18 V, f = 120 Hz) PSR 80 100 – dB Output Voltage Swing

High State Low State

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

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

3.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. T

=0°C for the MC34067 T

low

=–40°C for the MC33067 T

= + 70°C for MC34067

high

= + 85°C for MC33067

high

V

OH

V

OL

2.8 –

3.2

0.6

–

0.8

V

2

MOTOROLA ANALOG IC DEVICE DATA

MC34067 MC33067

ELECTRICAL CHARACTERISTICS (V

= 12 V [Note 2], R

CC

OSC

= 18.2 k, R

VFO

= 2940, C

= 300 pF, RT = 2370 k, CT = 300 pF,

OSC

CL = 1.0 nF. 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

OSCILLAT OR

Frequency (Error Amp Output Low)

TA = 25°C Total Variation (VCC = 10 to 18 V, TA = T

Low

to T

High

f

OSC(low)

Frequency (Error Amp Output High)

TA = 25°C Total Variation (VCC = 10 to 18 V, TA = T

Low

to T

High

f

OSC(high)

Oscillator Control Input Voltage, Pin 3 @ 25°C V

500 490

1900 1850

in

– 2.5 – V

525

–

540 550

2050–2150

2200

kHz

ONE–SHOT

Drive Output Off–Time

TA = 25°C Total Variation (VCC = 10 to 18 V, TA = T

Low

to T

High

t

Blank

235 225

250

–

270 280

ns

DRIVE OUTPUTS

Output Voltage

Low State (I

High State (I

Output Voltage with UVLO Activated (VCC = 6.0 V, I

= 20 mA)

Sink

= 200 mA)

Sink Source Source

= 20 mA) = 200 mA)

= 1.0 mA) V

Sink

V

OL(UVLO)

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

OL

OH

r f

– –

9.5

9.0

0.8

1.5

10.3

9.7

1.2

2.0 – –

– 0.8 1.2 V – 20 50 ns – 15 50 ns

V

FAULT COMP ARATOR

Input Threshold V Input Bias Current (V Propagation Delay to Drive Outputs (100 mV Overdrive) t

= 0 V) I

Pin 10

PLH(In/Out)

th

IB

0.93 1.0 1.07 V – –2.0 –10 µA – 60 100 ns

SOFT–START

Capacitor Charge Current (V Capacitor Discharge Current (V

= 2.5 V) I

Pin 11

= 2.5 V) I

Pin 11

chg

dischg

4.5 9.0 14 µA

3.0 8.0 – mA

UNDERVOLTAGE LOCKOUT

Startup Threshold, VCC Increasing

Enable/UVLO Adjust Pin Open Enable/UVLO Adjust Pin Connected to V

CC

Minimum Operating Voltage After Turn–On

Enable/UVLO Adjust Pin Open Enable/UVLO Adjust Pin Connected to V

CC

Enable/UVLO Adjust Shutdown Threshold Voltage V Enable/UVLO Adjust Input Current (Pin 9 = 0 V) I

V

th(UVLO)

V

CC(min)

th(Enable)

in(Enable)

14.8

8.0

7.6

16

9.0

8.6

17.2 10

10

9.6

6.0 7.0 – V – –0.2 –1.0 mA

V

TOTAL DEVICE

Power Supply Current (Enable/UVLO Adjust Pin Open)

Startup (VCC = 13.5 V) Operating (f

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

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

3.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. T

low

= 500 kHz) (Note 2)

OSC

=0°C for the MC34067 T =–40°C for the MC33067 T

= + 70°C for MC34067

high

= + 85°C for MC33067

high

I

CC

– –

0.5 27

0.8 35

mA

MOTOROLA ANALOG IC DEVICE DATA

3

MC34067 MC33067

Figure 1. Oscillator Timing Resistor

versus Discharge Time

500

Ω

400

300

200

100

, OSCILLAT OR TIMING RESIST OR (k )

OSC

R

C

= 300 pF

OSC

C

= 200 pF

OSC

C

= 500 pF

OSC

VCC = 12 V

∞

R

=

VFO

RT =

∞

CT = 500 pF

°

C

TA = 25

0

Oscillator Discharge Time is Measured at the Drive Outputs.

t

, OSCILLAT OR DISCHARGE TIME (µs)

dischg

3500 3000 2500 2000 1500 1000

, OSCILLAT OR FREQUENCY (kHz)

500

OSC

f

Figure 3. Error Amp Output Saturation

V oltage versus Oscillator Control Current

0.35

0.30

0.25

0.20

0.15

0.10

, OUTPUT SA TURATION VOLTAGE (V)

sat

V

0.05 0 0.5 1.0 1.5 2.0 2.5 3.0 0.1 0.3 0.6 1.0 3.0 6.0 10

I

, OSCILLAT OR CONTROL CURRENT (mA) tOS, ONE–SHOT PERIOD (

OSC

60

30

Ω

20

10

, TIMING RESISTOR (k )

400

T

R

3.0

Figure 2. Oscillator Frequency versus

Oscillator Control Current

VCC = 12 V

°

C

TA = 25 R

= 18.2 k

OSC

C

= 300 pF

OSC

0

0 400 800 1200 1600 20000 20406080100

I

, OSCILLAT OR CONTROL CURRENT (mA)

OSC

Figure 4. One–Shot Timing Resistor

versus Period

VCC = 12 V C

= 500 pF

OSC

R

= 100 k

OSC

°

C

TA = 25

CT = 300 pF CT = 500 pF

CT = 200 pF

One–Shot Period is Measured at the Drive Outputs.

µ

s)

Figure 5. Open Loop V oltage Gain and Phase

versus Frequency

50

Phase Margin

°

= 64

VCC = 12 V VO = 2.0 V RL = 100 k TA = 25

40 30

20 10

0

, OPEN LOOP VOL TAGE GAIN (dB)

–10

VOL

A

–20

10 k 100 k 1.0M 10M – 55 – 25 0 25 50 75 125100

Gain

Phase

f, FREQUENCY (Hz)

50 60 70

°

C

80 90 100

0, EXCESS PHASE (DEGREES)

110 120

, REFERENCE OUTPUT VOLTAGE CHANGE (mV)

∇

V

4

Figure 6. Reference Output V oltage Change

versus T emperature

*V

= 5.0 V

ref

0

–10

–20

*V

= 5.0 V

–30

–40

–50

ref

*V

= 5.0 V

ref

TA, AMBIENT TEMPERATURE (°C)

VCC = 12 V

∞

RL = *V

ref at TA

= 25°C

MOTOROLA ANALOG IC DEVICE DATA

MC34067 MC33067

Figure 7. Reference V oltage Change

0

–10

–20

–30

–40

–50

, REFERENCE OUTPUT VOLTAGE CHANGE (mV)

ref

V

∇

VCC = 12 V

Figure 9. Drive Output Waveform

90%

versus Source Current

TA = – 40°C

TA = – 20°C

TA = –125°C

I

, REFERENCE SOURCE CURRENT (mA)

ref

CL = 1.0 nF

TA = 25

Figure 8. Drive Output Saturation Voltage

versus Load Current

, OUTPUT SA TURATION VOLTAGE (V) V

sat

–1.0

– 2.0 – 3.0

3.0

2.0

1.0

0

V

CC

TA = 25°C

TA = – 40°C

0

0 0.2 0.4 0.6 0.8 1.00 20 40 60 80 100

Source Saturation

(Load to Ground)

TA = – 40°C

TA = 25°C

Source Saturation

(Load to VCC)

IO, OUTPUT LOAD CURRENT (A)

80

VCC = 12 V

µ

s Pulsed Load

120 Hz Rate

Gnd

Figure 10. Soft–Start Saturation Voltage

versus Capacitor Discharge Current

3.2

°

C

2.4

10%

2000

1600

1200

800

f, FREQUENCY (kHz)

400

20 ns/DIV

Figure 11. Operating Frequency

versus Supply Current

VCC = 12 V CL = 1.0 nF

°

C

TA = 25

1.6

0.8

OL

0

V , SOFT–START SATURATION VOLTAGE (V)

0 2.0 4.0 6.0 8.0 10

I

, CAPACITOR DISCHARGE CURRENT (mA)

dchg

VCC = 12 V Pin 10 = V TA = 25 °C

Figure 12. Supply Current versus Supply V oltage

24

TA = 25 °C

20

Enable/UVLO

Adjust Pin

Open

CC

I , SUPPLY CURRENT (mA)

16

12

8.0

4.0

Enable/UVLO

Adjust Pin

to V

CC

ref

0

30 40 50 60 70 80 90 0 4.0 8.0 12 16 20

ICC, INPUT SUPPLY CURRENT (mA)

0

VCC, SUPPLY VOLTAGE (V)

MOTOROLA ANALOG IC DEVICE DATA

5