Motorola MC33364D, MC33364D1, MC33364D2 Datasheet

Order this document by MC33364/D

 

    

The MC33364 series are variable frequency SMPS controllers that operate in the critical conduction mode. They are optimized for low power, high density power supplies requiring minimum board area, reduced component count, and low power dissipation. Each narrow body SOIC package provides a small footprint. Integration of the high voltage startup saves approximately 0.7 W of power compared to resistor bootstrapped circuits.

Each MC33364 features an on–board reference, UVLO function, a watchdog timer to initiate output switching, a zero current detector to ensure critical conduction operation, a current sensing comparator, leading edge blanking, and a CMOS driver. Protection features include the ability to shut down switching, and cycle–by–cycle current limiting.

The MC33364D1 is available in a surface mount SO–8 package. It has an internal 126 kHz frequency clamp. For loads which have a low power operating condition, the frequency clamp limits the maximum operating frequency , preventing excessive switching losses and EMI radiation.

The MC33364D2 is available in the SO–8 package without an internal frequency clamp.

The MC33364D is available in the SO–16 package. It has an internal 126 kHz frequency clamp which is pinned out, so that the designer can adjust the clamp frequency by connecting appropriate values of resistance.

• Lossless Off–Line Startup

• Leading Edge Blanking for Noise Immunity

• Watchdog T imer to Initiate Switching

• Minimum Number of Support Components

• Shutdown Capability

• Over Temperature Protection

• Optional Frequency Clamp



CRITICAL CONDUCTION

GREENLINE SMPS

CONTROLLER

SEMICONDUCTOR

TECHNICAL DATA

8

1

D1, D2 SUFFIX

PLASTIC PACKAGE

CASE 751

(SO–8)

16

1

D SUFFIX

PLASTIC PACKAGE

CASE 751B

(SO–16)

PIN CONNECTIONS

ORDERING INFORMATION

Operating

Device

MC33364D1 MC33364D2 MC33364D SO–16

Temperature Range

TJ = –25° to +125°C

Package

SO–8 SO–8

Representative Block Diagram

Restart

Delay

PWM

Comparator

FB

Current

Sense

ZC Det

This document contains information on a new product. Specifications and information herein are subject to change without notice.

MOTOROLA ANALOG IC DEVICE DATA

Leading

Edge

Blanking

Zero

Current

Detector

This device contains 335 active transistors.

S R

Q

R

Watchdog

Timer

Thermal

Shutdown

V

ref

UVLO

V

UVLO

Bandgap

Reference

Frequency

Clamp

CC

Line

V

CC

V

ref

Gnd

Gate

Optional Frequency Clamp

MC33364D1 MC33364D2

Zero Current

Current Sense

Voltage FB

Zero Current

Current Sense

Voltage FB

Freq Clamp

 Motorola, Inc. 1997 Rev 0

18 2 3

V

4

ref

(Top View)

MC33364D

116

N/C

2 3 4

N/C

5

V

6

ref

7

N/C

8

(Top View)

Line V

7

CC

Gate Drive

6

P Gnd

5

Line

A V

13

CC

P V

12

CC

11

Gate Drive

10

P Gnd

9

A Gnd

1

MAXIMUM RATINGS

Á

ÁÁÁ ÁÁÁ

ÁÁÁ

Á

ÁÁÁ

Á

ÁÁÁ

Á

ÁÁÁ

Á

ÁÁÁ

Á

ÁÁÁ

(TA = 25°C, unless otherwise noted.)

Rating Symbol Value Unit

Power Supply Voltage (Transient) Power Supply Voltage (Operating) Line Voltage Current Sense, Compensation,

Voltage Feedback, Restart Delay and Zero

Current Input Voltage Zero Current Detect Input Restart Diode Current Power Dissipation and Thermal Characteristics

D1 and D2 Suffix, Plastic Package Case 751

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

D Suffix, Plastic Package Case 751B–05

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

Operating Junction Temperature

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Operating Ambient Temperature

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Storage Temperature Range

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NOTE: ESD data available upon request.

V

CC

V

CC

V

Line

V

in1

I

in

I

in

D

θJA

D

θJA

T

J

ÁÁ

T

A

ÁÁ

T

stg

ÁÁ

MC33364

700

–1.0 to +10 V

±5.0

450 mW 178 °C/W

550 mW 145 °C/W

150

ÁÁÁ

–25 to +125

ÁÁÁ

–55 to +150

ÁÁÁ

20 16

5.0

mA mA

°C

Á

°C

Á

°C

Á

V V V

ELECTRICAL CHARACTERISTICS (V

= 12 V, for typical values TA = 25°C, for min/max values TJ = –25 to 125°C)

CC

Characteristic

VOLTAGE REFERENCE

Reference Output Voltage (I

= 0 mA, TJ = 25°C)

Out

Line Regulation (VCC = 10 V to 20 V) Load Regulation (I Maximum V

ref

= 0 mA to 5.0 mA)

Out

Output Current

Reference Undervoltage Lockout Threshold

ZERO CURRENT DETECTOR

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

High State (I Low State (I

= 3.0 mA) V

DET

= –3.0 mA) V

DET

CURRENT SENSE COMPARATOR

Input Bias Current (VCS = 0 to 2.0 V)

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Built In Offset

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Feedback Pin Input Range

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Feedback Pin to Output Delay

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DRIVE OUTPUT

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Source Resistance (Drive = 0 V, V Sink Resistance (Drive = VCC, V

= VCC – 1.0 V)

Gate

= 1.0 V) R

Gate

Output Voltage Rise T ime (25% – 75%) (CL = 1.0 nF) Output Voltage Fall Time (75% – 25%) (CL = 1.0 nF) Output Voltage in Undervoltage (VCC = 7.0 V, I

Sink

= 1.0 mA)

Symbol Min Typ Max Unit

V

ref

Reg

line

Reg

load

I

O

V

th

V

th

V

H

IH IL

I

IB

ÁÁÁ

V

IO

ÁÁÁ

V

FB

ÁÁÁ

t

DLY

ÁÁÁ

R

OH OL

t

r

t

f

V

O(UV)

4.90 – – – –

0.9 –

5.05

2.0

0.3 5

4.5

1.0

200

5.20 50 50

– –

1.1 –

9.0 10.33 12

–0.5 –0.75 –1.1

–0.5

ÁÁÁ

50

ÁÁÁ

1.1

ÁÁÁ

100

ÁÁÁ

10

0.02

ÁÁÁ

108

ÁÁÁ

1.24

ÁÁÁ

232

ÁÁÁ

36

0.5

ÁÁ

170

ÁÁ

1.4

ÁÁ

400

ÁÁ

70

5 11 25 Ω –

– –

67 28

0.01

150

50

0.03

ÁÁ

V mV mV mA

V

V mV

V

µA

mV

V

ns

Ω

ns ns

V

2

MOTOROLA ANALOG IC DEVICE DATA

MC33364

ÁÁÁ

Á

ÁÁÁ

Á

ÁÁÁ

Á

ÁÁÁ

ÁÁÁ ÁÁÁ

ÁÁÁ

Á

ÁÁÁ

Á

ÁÁÁ

ELECTRICAL CHARACTERISTICS (continued) (V

= 12 V, for typical values TA = 25°C, for min/max values TJ = –25 to 125°C)

CC

Characteristic UnitMaxTypMinSymbol

LEADING EDGE BLANKING

Delay to Current Sense Comparator Input

(VFB = 2.0 V, VCS = 0 V to 4.0 V step, CL = 1.0 nF)

TIMER

Watchdog Timer

UNDERVOLTAGE LOCKOUT

Startup Threshold (VCC Increasing)

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Minimum Operating Voltage After Turn–On (VCC Decreasing)

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FREQUENCY CLAMP

БББББББББББББББ

Internal FC Function (pin open)

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Internal FC Function (pin grounded)

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Frequency Clamp Input Threshold

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Frequency Clamp Control Current Range

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TOTAL DEVICE

Line Startup Current (V

= 50 V) (VCC = V

Line

th(on)

– 1.0 V)

Restart Delay Time t Line Pin Leakage (V

Line Startup Current (VCC = 0 V, V

= 575 V) I

Line

= 50 V) I

Line

VCC Dynamic Operating Current (50 kHz, CL = 1.0 nF) VCC Static Operating Current (VCC = 16 V, V

БББББББББББББББ

ref

= 0)

VCC Pin Leakage (VCC = 11 V)

t

PHL(in/out)

t

DLY

V

th(on)

ÁÁÁ

V

Shutdown

ÁÁÁ

f

max

ÁÁÁ

f

max

ÁÁÁ

V

th(FC)

ÁÁÁ

I

Control

ÁÁÁ

I

Line DLY

Line Line

I

CC

ÁÁÁ

ICC

Lkg

–

200

14

ÁÁÁ

6.5

ÁÁÁ

ÁÁÁ90ÁÁÁ

400

ÁÁÁ

ÁÁÁ–ÁÁÁ

ÁÁÁ30ÁÁÁ70ÁÁ

5.0

250

410

15

ÁÁÁ

7.6

ÁÁÁ

126 564

ÁÁÁ

2.0

8.5

700

16

ÁÁ

8.5

ÁÁ

160

ÁÁ

700

ÁÁ

–

ÁÁ

110

12

100 ms

0.5 32 70 µA

6.0 10 12 mA

1.5 –

ÁÁÁ

300

2.75

3.0

ÁÁÁ

544

4.5 –

ÁÁ

800

ns

µs

V

ÁÁ

V

ÁÁ

kHz

ÁÁ

kHz

ÁÁ

V

ÁÁ

µA

ÁÁ

mA

ÁÁ

µA

MOTOROLA ANALOG IC DEVICE DATA

3

MC33364

0

5

OUTPUT VOLTAGE (V)

30 25 20 15

10

5.0

–5.0

16

12

8.0

Figure 1. Drive Output Waveform

Figure 2. Watchdog Timer Delay

versus T emperature

VCC = 14 V CL = 1000 pF

°

C

TA = 25

0

5.0 µs/DIV

Figure 3. Reference V oltage

versus T emperature

VCC = 14 V

µ

, WATCHDOG TIME DELAY ( s)

DLY

t

500

450

400

350

300

–55

6.0

4.0 Circuit of Figure 7 TA = 25

VCC = 14 V

–25 0 25 50 75 100 12

TA, AMBIENT TEMPERATURE (°C)

Figure 4. Supply Current

versus Supply V oltage

°

C

4.0

, VOLTAGE FEEDBACK

FB

V

THRESHOLD CHANGE (mV)

5.0

∆

–4.0

–55

–25 0 25 50 75 125100

TA, AMBIENT TEMPERATURE (°C)

Figure 5. Transient Thermal Resistance

1000

D Suffix 16 Pin SOIC

°

100

, THERMAL RESISTANCE

JA(t)

JUNCTION–TO–AIR ( C/W)

θ

R

10

0.01

0.1 1.0 10 100 t, TIME (s)

2.0

, SUPPLY CURRENT (mA)

CC

I

0

4.0

1000

µ

100

10

1.0

, PROGRAMMED DEAD TIME ( sec)

d

T

0.1

6.0 8.0 10 12 14 16 VCC, SUPPLY VOLTAGE (V)

Figure 6. Dead Time

versus Input Current

D Suffix 16 Pin SOIC

°

C

TA = 25 VCC = 14 V

1.0 10 100 100

Iin, CURRENT SOURCED INTO PIN 8 (µA)

4

MOTOROLA ANALOG IC DEVICE DATA

MC33364

FUNCTIONAL DESCRIPTION

INTRODUCTION

With the goal of reducing the size and cost of off–line power supplies, there is an ever increasing demand for an economical method of obtaining a regulated galvanically isolated dc output voltage using a control which operates

Figure 7. Functional Block Diagram

C5 10

D3 1N4006

92 to

270 Vac

EMI

Filter

1N4006

D2

D1

1N4006

D4

MC33364

R2

22 k

1.5 V

UVLO

+

Leading

Blanking

44 K

14 K

V

CC

5.0 V

Reference

Zero Current

Frequency

Clamp

C2

0.01

D9 1N4148

R13 100

4.0 K 10 V

Zero Current Detect

0.3/

0.25 V

2.0 V

RQ

Timer

R

Q

R

Q

S

En

5.0 V

10 pF

3.0

R S

µ

Q

A

2.0 V

Line

+

15/7.6

Edge

5.0 k

A Gnd

directly from the ac line. This data sheet describes a monolithic control IC that was specifically designed for power supply control with a minimal number of external components. It offers the designer a simple cost effective solution to obtain the benefits of off–line power regulation.

T1

En

C3

V

CC

P V

Gate Drive

P Gnd

Current Sense

Voltage FB

V

ref

1N4934

20

+

D5

CC

R1 56

R5 47 k

R6 47 K

470 R4

D7 1N4148

R12 100

C9 .01

C4 .001

R3

1.2 K

C10

0.1

D6 MURS160T3

Q1

MTD1N60

R7

2.2

D8 MBRS340T3

C5 300

U3

MOC8102

VO+

5

39 k

U2 TL431

2.5

R9

R8 430

R10 14 k

1 24

C7 10

2

R10 R11

C8 330 pF

1

R11 10 k

Ǔ

)

1

3

ǒ

6.0 V 2 Amp

Operating Description

The MC33364 contains many of the building blocks and protection features that are employed in modern high performance current mode power supply controllers. Referring to the block diagram in Figure 7, note that this device does not contain an oscillator. A description of each of the functional blocks is given below.

Zero Current Detector

The MC33364 operates as a critical conduction current mode controller, whereby output switch conduction is initiated by the Zero Current Detector and terminated when the peak inductor current reaches the input threshold level. The Zero Current Detector initiates the next on–time by

MOTOROLA ANALOG IC DEVICE DATA

setting the RS Latch at the instant the inductor current reaches zero. This critical conduction mode of operation has two significant benefits. First, since the MOSFET cannot turn–on until the inductor current reaches zero, the output rectifier’s reverse recovery time becomes less critical allowing the use of an inexpensive rectifier. Second, since there are no deadtime gaps between cycles, the ac line current is continuous thus limiting the peak switch to twice the average input current

The Zero Current Detector indirectly senses the inductor current by monitoring when the auxiliary winding voltage falls below 0.25 V . To prevent false tripping, 50 mV of hysteresis is provided. The Zero Current Detector input is internally

5