Allegro s6411 Service Manual

STR-S6411 and STR-S6411F

123456789

OFF-LINE SWITCHING REGULATORS

STR-S6411 AND
STR-S6411F

OFF-LINE SWITCHING REGULATORS

– WITH POWER MOSFET OUTPUT

These devices are specifically designed to meet the requirements

for increased integration and reliability in off-line flyback (STR-S6411)

DRAIN

SOURCE

GATE

POWER

GROUND

SOFT

START

OVER-CURRENT

PROTECTION

V

SIGNAL

GROUND

FDBK

REF.

PWM

OSC.

+

Dwg. PK-003

LATCH

+

IN

UVLO

and forward (STR-S6411F) converters operating in a fixed-frequency
PWM mode. Each device incorporates the primary control and drive
circuits with an avalanche-rated high-voltage power MOSFET. Crucial
system parameters such as switching frequency and maximum duty
cycle are fixed during manufacture. The STR-S6411 and STR-S6411F
differ only in their maximum duty cycle. Control circuit decoupling and
layout are optimized within each device.

Cycle-by-cycle and average-current limiting, soft start, under­voltage lockout with hysteresis, and thermal shutdown protect the
device during all normal and overload conditions. The performance and
reliability of these devices, and their variable-frequency counterparts,
has been proven in substantial volume production.

The requirements of high dielectric isolation and low transient
thermal impedance and steady-state thermal resistance are satisfied in
an over-molded, 9-pin single in-line power package.

Data Sheet

28101.1

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, VIN............................ 35 V

Drain-Source Voltage, VDS............... 800 V

Drain Current, I

continuous ..................................... ±5 A

single pulse, tw ≤1 ms .................. ±20 A

Avalanche Energy, E

single pulse............................... 400 mJ

Gate-Source Voltage, VGS................ ±20 V

Gate-Drive Current Range,

IG................................. -0.7 A to +1.5 A

Over-Current Protection Voltage Range,

V

............................. -0.3 V to +4.0 V

OCP

Insulation RMS Voltage,

V

WM(RMS)

DISCONTINUED PRODUCT

Package Power Dissipation,

PD........................................ See Graph

FET Channel Temperature, TJ...... +150°C

Internal Frame Temperature, TF... +125°C
Operating Temperature Range,

TA............................... -20°C to +125°C

Storage Temperature Range,

T

............................. -30°C to +125°C

stg

D

A

..................................... 2000 V

— FOR REFERENCE ONLY

FEATURES

■ PWM Flyback Conversion or Forward Conversion

■ Output Power to 250 W

■ Pulse-by-Pulse Current Limiting

■ Fixed-Frequency 100 kHz PWM

■ Avalanche-Rated Power MOSFET Switch

■ Soft Start

■ Internal Under-Voltage Lockout and Thermal Shutdown

■ Low External Component Count

■ Over-Molded SIP with Isolated Heat Spreader

Always order by complete part number:
STR-S6411 or STR-S6411F .

TM

TM

A

MicroSystems, Inc.

STR-S6411 and STR-S6411F

OFF-LINE SWITCHING REGULATORS

FUNCTIONAL BLOCK DIAGRAM

V

UVLO

IN

7

FDBK

9

GATE

3

REF.

5

SOFT

START

R

toff

8

SIGNAL

GROUND

R

ton

PWM

+

OSC.

R

LATCH

S

Q

4

POWER

GROUND

+

0.2 V

DRAIN

1

SOURCE

2

OVER-CURRENT

6

PROTECTION

Dwg. FK-003

ALLOWABLE PACKAGE POWER DISSIPATION MAXIMUM SAFE OPERATING AREA

62 W

60

MOUNTING SURFACE
TEMPERATURE

100

RECOMMENDED MAX.

40

20

FREE AIR

3.2 W

ALLOWABLE PACKAGE POWER DISSIPATION in WATTS

0

20 60 100

A

FRAME TEMP. = +100°C

TEMPERATURE in °C

MicroSystems, Inc.

LIMITED BY FRAME
TEMP. = +125°C MAX.

TM

TM

30

LIMITED
BY r

DS(on)

NO HEAT SINK
NATURAL COOLING
T = +25°C

A

10 30 100 300

DRAIN-TO-SOURCE VOLTAGE in VOLTS

140

Dwg. GK-003

10

3.0

1.0

DRAIN CURRENT in AMPERES

0.3

0.1

3.0

115 Northeast Cutoff, Box 15036
W

Worcester, Massachusetts 01615-0036 [phone]
Copyright © 1994 Allegro MicroSystems, Inc.

t = 0.1 ms SINGLE PULSE

w

t = 1 ms SINGLE PULSE

w

t = 10 ms SINGLE PULSE

w

DS

LIMITED BY V max

1000

Dwg. GK-004-1

STR-S6411 and STR-S6411F

OFF-LINE SWITCHING REGULATORS

600

500

400

ALLOWABLE AVALANCHE ENERGY

300

200

100

ALLOWABLE AVALANCHE ENERGY in mJ

0

0 60 100

SINGLE PULSE
DRAIN CURRENT = 5 A
SUPPLY VOLTAGE = 50 V

20 40 80 120 160

STARTING CHANNEL TEMPERATURE in °C

140

Dwg. GK-009-1

ELECTRICAL CHARACTERISTICS at T

= +25°C, VIN = 17 V, voltage measurements are referenced to

A

Signal Ground (pin 8) (unless otherwise noted).

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

On-State Voltage V
Under-Voltage Lockout V
FET Leakage Current I
FET ON Resistance r

DS(on)

Forward Transconductance g
FET Input Capacitance C
Propagation Delay Time t

Oscillator Frequency f
Maximum ON Time t

INT
INQ

DSS

fs

iss

phl

t

plh

osc

on

Turn-on, increasing V
Turn-off, decreasing V

IN

IN

14.4 16 17.6 V

8.4 9.4 10.4 V
VDS = 800 V – – 1.2 mA
VGS = 10 V, ID = 3 A – 1.8 2.2 Ω
VGS = 10 V, ID = 3 A 3.0 – – S
VDS=10 V, VGS=0 V, f=1 MHz – 1800 – pF
Turn-on, 10% VGS to 10% V
Turn-off, 90% VGS to 90% V

DS
DS

–60– ns
– 140 – ns

93 100 107 kHz
STR-S6411 5.1 5.7 6.5 µs
STR-S6411F 3.8 4.5 5.2 µs

Over-Current Threshold V
OCP Current I
Feedback Current I
Soft Start Threshold Voltage V
Soft Start Current I
Power Ground Current I
Supply Current I

I

IN(OFF)

Insulation RMS Voltage V

WM(RMS)

OCP(th)

OCP

FDBK

SS(th)

SS

PG

IN(ON)

VSS = 0 V – -100 – µA
tw = 200 ns – -1.0 -1.5 A
Operating – 23 – mA
Start up, VIN = 12 V – – 500 µA
All terminals simultaneous reference 2000 – – V

160 200 240 mV

-250 -400 -550 µA
– -1.8 – mA
– – 0.4 V

metal plate against backside

Thermal Resistance R

θJM

FET channel to mounting surface – 2.0 – °C/W

NOTES: Negative current is defined as coming out of (sourcing) the specified device terminal.

Typical Data is for design information only.

STR-S6411 and STR-S6411F

OVER-CURRENT THRESHOLD VOLTAGE in mV

OFF-LINE SWITCHING REGULATORS

TYPICAL CHARACTERISTICS

160

140

120

100

80

OSCILLATOR FREQUENCY in kHz

60

40

-20 40 80

0 20 60 100 140

AMBIENT TEMPERATURE in °C

300

120

Dwg. GK-005

35

30

25

20

15

10

OPERATING SUPPLY CURRENT in mA

5

0

0

V

INQ

510 203040

INPUT VOLTAGE in VOLTS

T = +100°C

A

V

INT

15 25

T = +25°C

A

T = -20°C

A

35

Dwg. GK-006

A

250

200

150

100

50

0

TM

TM

MicroSystems, Inc.

0 20 60 100 140

-20 40 80

AMBIENT TEMPERATURE in °C

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

120

Dwg. GK-007

STR-S6411 and STR-S6411F

OFF-LINE SWITCHING REGULATORS

TYPICAL PWM FLYBACK CONVERSION USING STR-S6411

WARNING: lethal potentials are present. See text.

NC

39

AC INPUT

220 V/240 V

RECTIFIER

FULL-BRIDGE

7

+

STR-S6411

+ OUTPUT

+

1

+

2

VOLTAGE

SENSE

– OUTPUT

AC INPUT

220 V/240 V

RECTIFIER

FULL-BRIDGE

+

8

5

4

6

Dwg. EK-003-2

TYPICAL PWM FORWARD CONVERSION USING STR-S6411F

WARNING: lethal potentials are present. See text.

+ OUTPUT

NC

7

+

STR-S6411F

39

+

1

+

2

VOLTAGE

SENSE

– OUTPUT

+

5

8

4

6

Dwg. EK-003-3

STR-S6411 and STR-S6411F

OFF-LINE SWITCHING REGULATORS

APPLICATIONS INFORMATION

WARNING — These devices are designed to be operated at lethal voltages and energy levels.

Circuit designs that embody these components must conform with applicable safety requirements.
Precautions must be taken to prevent accidental contact with power-line potentials.
Do not connect grounded test equipment.

The use of an isolation transformer is recommended during circuit development and breadboarding.

The power MOSFET outputs of these devices are similar to the International Rectifier type IRFPE40. These devices
feature an excellent combination of fast switching, ruggedized device design, low on-resistance, and cost effectiveness.

Recommended mounting hardware torque:

4.34 - 5.79 lbf•ft (6 – 8 kg•cm or 0.588 – 0.784 Nm).

Recommended metal-oxide-filled, alkyl-degenerated oil base, silicone grease:

Dow Corning 340, or equivalent

±0.012

1.49

0.033

+0.008
–0.004

0.118

1

0.016

Dimensions in Inches

(Based on 1 mm = 0.03937")

0.953

±0.008

T REF.

0.610

±0.008

9

M

0.130

±0.008

±0.008

0.709

0.100

±0.004

ø

0.177

±0.028

0.216

±0.008

0.130

±0.004

0.276

±0.016

0.216

0.026

+0.008
–0.004

A

PACKAGE

CENTER

TM

TM

MicroSystems, Inc.

LEAD
CENTER

NOTE: Exact body and lead configuration at vendor’s option within limits shown.

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

Dwg. MK-003-9 in

STR-S6411 and STR-S6411F

OFF-LINE SWITCHING REGULATORS

Dimensions in Millimeters

24.2

±0.2

T REF

15.5

3.0

±0.2

3.3

±0.2

M

ø

5.5

±0.2

±0.3

23.0

0.85

+0.2
–0.1

1

0.4

PACKAGE

CENTER

±0.2

18.0

3.3

±0.1

7.0

±0.4

5.5

9

2.54

±0.1

0.65

+0.2
–0.1

4.5

±0.7

LEAD
CENTER

NOTE: Exact body and lead configuration at vendor’s option within limits shown.

Dwg. MK-003-9 mm

STR-S6411 and STR-S6411F

OFF-LINE SWITCHING REGULATORS

POWER CONVERSION/POWER MANAGEMENT

SELECTION GUIDES

SWITCHING REGULATOR PMCMs

Part

Number* Application AC In Max P

5703 Quasi-Resonant Flyback Converter 110/120 V 140 W 500 V 6 A Bipolar
5707 Quasi-Resonant Flyback Convertter 85-265 V 90 W 850 V 6 A Bipolar

220/240V 140 W

5708 Quasi-Resonant Flyback Converter 85-265 V 120 W 850 V 7.5 A Bipolar

220/240 V 180 W
6511 Quasi-Resonant Flyback Converter 110/120 V 180 W 450 V 11 A MOSFET
6703 Quasi-Resonant Flyback Converter 110/120V 140 W 500 V 6 A Bipolar
6704 Quasi-Resonant Flyback Converter 110/120 V 100 W 500 V 5 A Bipolar

O

Power Switch

6707 Quasi-Resonant Flyback converter 85-265 V 90 W 850 V 6 A Bipolar

220/240 V 140 W
6708 Quasi-Resonant Flyback Converter 85-265 V 120 W 850 V 7.5 A Bipolar

220/240 V 180 W
6709 Quasi-Resonant Flyback Converter 85-265 V 160 W 850 W 10 A Bipolar

220/240 V 220 W

* Complete part number includes additional characters to indicate operating temperature range and package style.

LINEAR REGULATOR ICs

Part

Number* V

8184 3.0 V 10 V 300 mV @ 125 mA 250 mA SOT-89
8187 3.3 V 10 V 300 mV @ 125 mA 250 mA SOT-89
8188 2.5–3.3 V 10 V 300 mV @ 125 mA 250 mA SOT-89
8188 2.5–3.3 V 10 V 300 mV @ 125 mA 250 mA SOIC

* Complete part number includes additional characters to indicate operating temperature range and package style.
Also — 83145 and 84145 Latched, Universal Input-Voltage Switches.

O

Max DC In Max Dropout Max I

O

Package

Allegro MicroSystems, Inc. reserves the right to make, from time to time, such
departures from the detail specifications as may be required to permit improvements
in the design of its products. Components made under military approvals will be in
accordance with the approval requirements.

The information included herein is believed to be accurate and reliable.
However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for
any infringements of patents or other rights of third parties which may result from its
use.

TM

A

TM

MicroSystems, Inc.

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]