STR84145 [ALLEGRO]

LATCHED, UNIVERSAL INPUT-VOLTAGE SWITCHES; LATCHED ，通用输入电压切换开关


型号：	STR84145
厂家：	ALLEGRO MICROSYSTEMS
描述：	LATCHED, UNIVERSAL INPUT-VOLTAGE SWITCHES LATCHED ，通用输入电压切换开关开关输入元件局域网
文件：	总8页 (文件大小：87K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

STR83145 AND

STR84145

INTERIM ISSUE

(subject to change without notice)

August 16, 1994

LATCHED, UNIVERSAL

INPUT-VOLTAGE SWITCHES

Intended for power supplies with universal inputs (85 V to 265 V

rms), the STR83145 and STR84145 latched, universal input-voltage

switches incorporate timing, control, and drive circuitry with a high-

current triac (bidirectional triode thyristor) switch. Each device senses

the applied ac line potential and automatically switches the rectifier and

associated capacitors between a voltage-doubler configuration (for line

voltages to 141 V) and a full-bridge configuration (for line voltages

greater than 149 V). This eliminates the possibility of user error with

adjustable jumpers or switches. Also, the related switch-mode power

stage need operate only over a reduced range of dc input voltages

when compared with "wide input" power supplies using a bridge rectifier

only. The reduction in dc input voltage range permits the use of lower-

voltage capacitors and leads to a reduction in power stage stresses and

power dissipation. The STR83145 and STR84145 differ only in their

maximum ac current rating (10 A and 12 A, respectively).

The internal sensitive-gate triac is switched by a temperature-

compensated constant-current gate driver driven by a 15 kHz pulse

train to reduce power dissipation. The switch-over voltage is accurately

set during manufacture for consistent operation. An user-adjustable

delay is provided to ensure start-up in the full-bridge mode. Once

established (by an input voltage greater than 149 V rms), an integral

latch holds the full-bridge mode to preclude false application of the

doubler mode during brownouts, voltage droops, or missing cycles.

The requirements of low transient thermal impedance and steady-

state thermal resistance are satisfied in a molded, 5-lead single in-line

power package. Similar input-voltage switches, with a switch point of

159 V rms, are also available.

Dwg. PK-005

ABSOLUTE MAXIMUM RATINGS

FEATURES

Repetitive Peak OFF-State Voltage,

V_DRM............................................. 500 V

■ Low Duty Cycle Triac Drive for Minimum Dissipation

Static ON-State Current, I_T(RMS)

■ For Universal Input Operation Between 85 V rms and 265 V rms

STR83145...................................... 10 A

STR84145...................................... 12 A

to 10 A or 12 A

■ Internal Latch Prevents False Mode Switching

■ Internal Sensitive-Gate Power Triac

■ Adjustable Start-Up Delay

■ Accurate 145 V rms Switch-Point Voltage

■ Low External Parts Count

Non-Repetitive Surge ON-State Current, I_TSM

STR83145.................................... 100 A

STR84145.................................... 120 A

Package Power Dissipation,

P_D........................................ See Graph

■ Low Power Dissipation

■ Low-Power External Parts

Triac Junction Temperature, T_J..... +125°C

Frame Temperature, T_M................ +100°C

Always order by complete part number:

Operating Temperature Range,

Part Number Max. On-State Current

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

STR83145

STR84145

10 A rms

12 A rms

Storage Temperature Range,

T_stg............................. -40°C to +125°C

™

STR83145 AND STR84145

LATCHED, UNIVERSAL

INPUT-VOLTAGE SWITCHES

FUNCTIONAL BLOCK DIAGRAM

GATE

MT2

MT1

REG.

LATCH

DELAY

7 V

OSC.

COMMON

Dwg. FK-004

ALLOWABLE PACKAGE POWER DISSIPATION

27 W

INFINITE HEAT SINK

(NO MICA SHEET)

150 mm x 150 mm x 2 mm

(WITH MICA SHEET)

100 mm x 100 mm x 2 mm

(WITH MICA SHEET)

75 mm x 75 mm x 2 mm

(WITH MICA SHEET)

IS LIMITED BY T

FREE AIR

2 W

IS LIMITED BY T

100

120

TEMPERATURE in °C

Dwg. GK-010

™

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

STR83145 AND STR84145

LATCHED, UNIVERSAL

INPUT-VOLTAGE SWITCHES

SIMPLIFIED OPERATION

240–373 V peak

246–373 V peak

Voltage-Doubler Mode

Full-Bridge Mode

Dwg. EK-006

ELECTRICAL CHARACTERISTICS at T_A= +25°C, voltage measurements are referenced to Common (pin 3)

(unless otherwise noted).

Limits

Characteristic

Symbol

Test Conditions

Min. Typ. Max. Units

On-State Voltage

V_TM

STR83145, I_T= 10 A*

–

1.6

–

1.8

STR84145, I_T= 12 A*

STR83145, V_D= 500 V

STR84145, V_D= 500 V

V_T= 2 V

–

Off-State Current

I_DRM

–

100

–

µA

–

Starting Voltage

V_S

t_D

–

100

Startup Time Delay

DC Switch-Over Voltage

C₂= 1 µF, V_MT1≥ 100 V dc

V_DELAY≤ 1 V

–

V_C

200 205 210

Temperature Coefficient

of Switch-Over Voltage

α_VC

-20°C ≤ T_M≤ +100°C

–

±45

–

mV/°C

Input Current

I_MT1

Voltage-doubler mode, V_MT1= 195 V

Full-bridge mode, V_MT1= 400 V

6.5

7.0

–

Delay Terminal Voltage

Triac Gate-Drive Osc. Freq.

Latch Reset Voltage

V_DELAY

f_o

–

V_gateref. MT1, V_MT1= 100 V

V_GATE= 400 mV

–

kHz

V_R

2.0

–

1.8

Thermal Resistance

R_θJM

FET channel to mounting surface

–

°C/W

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

Typical Data is for design information only.

*In practical use, I is recommended derated to 70%.

STR83145 AND STR84145

LATCHED, UNIVERSAL

INPUT-VOLTAGE SWITCHES

TYPICAL CHARACTERISTICS

FULL SINE WAVE

CONDUCTION ANGLE θ1 + θ2 ≈ 360°

210

205

200

θ2

θ1

-20

100

STATIC ON-STATE CURRENT in AMPERES

FRAME TEMPERATURE in °C

Dwg. GK-013

Dwg. GK-012

VMT1 = 100 V

-25

+25

+50

+75

+100

+125

AMBIENT TEMPERATURE in °C

Dwg. GK-008

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. Precau-

tions 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.

™

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

STR83145 AND STR84145

LATCHED, UNIVERSAL

INPUT-VOLTAGE SWITCHES

TYPICAL APPLICATION

-t °

RBV SERIES

240–373 V peak

RM11C

Dwg. EK-007

3000

1000

External component values have been selected for

optimum device performance and reliability. Except for

C₂, component values other than the following may

result in false operation of these devices.

C₁= 4.7 µF, 400 V

C₂= 1 µF, 50 V

C₃= 0.047 µF, 50 V

C₄= 0.047 µF, 250 V

R₁= 4.7 Ω

300

100

= 25°C

Turn-ON delay (forced full-bridge mode) may be

adjusted for desired system performance:

t_D≈ 68 x C₂

where t_Dis the delay time in ms

C₂is capacitance in µF

0.3

1.0

3.0

C2 CAPACITANCE in µF

Dwg. GK-011

STR83145 AND STR84145

LATCHED, UNIVERSAL

INPUT-VOLTAGE SWITCHES

Dimensions in Inches

(for reference only)

0.126

±0.004

0.701

±0.012

REF.

0.177

±0.008

0.197

REF.

0.157

±0.004

0.039

±0.004

0.177

±0.020

+0.008

–0.004

0.024

0.150

±0.004

0.177

±0.020

0.100

±0.004

Dwg. MK-001-5 in

NOTES:

1. Exact body and lead configuration at vendor's option within limits shown.

2. Recommended mounting hardware torque: 4.34 – 5.79 lbf•ft.

3. The hatched area is exposed heat spreader, electrically common to pin 3.

4. Recommended 0.003" to 0.006" thick mica insulator with metal-oxide-filled, alkyl-degenerated oil base, silicone grease

(Dow Corning 340, or equivalent); or Bergquist Sil-Pad^®.

37.5 mm

1.48"

0.5 mm

0.020"

8.5 mm

0.335"

3.2 mm +0.15 mm/0.060"

–0

0.126"

Dwg. MK-004

™

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

STR83145 AND STR84145

LATCHED, UNIVERSAL

INPUT-VOLTAGE SWITCHES

Dimensions in Millimeters

(controlling dimensions)

3.2 Ø

±0.1

17.8

±0.3

4.5

±0.2

REF.

4.0

±0.1

1.0

±0.1

+0.2

–0.1

0.6

3.81

±0.1

4.5

±0.5

2.54

±0.1

Dwg. MK-001-5 mm

NOTES:

1. Exact body and lead configuration at vendor's option within limits shown.

2. Recommended mounting hardware torque: 6 – 8 kgf•cm (0.588 – 0.785 Nm).

3. The hatched area is exposed heat spreader, electrically common to pin 3.

4. Recommended 0.08 mm to 0.15 mm thick mica insulator with metal-oxide-filled, alkyl-degenerated oil base, silicone

grease (Dow Corning 340, or equivalent); or Bergquist Sil-Pad^®.

37.5 mm

1.48"

0.5 mm

0.020"

8.5 mm

0.335"

3.2 mm +0.15 mm/0.060"

–0

0.126"

Dwg. MK-004

STR83145 AND STR84145

LATCHED, UNIVERSAL

INPUT-VOLTAGE SWITCHES

The products described here are manufactured in Japan by Sanken Electric Co.,

Ltd. for sale by Allegro MicroSystems, Inc.

Sanken Electric Co., Ltd. and Allegro MicroSystems, Inc. reserve 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 their products.

The information included herein is believed to be accurate and reliable.

However, Sanken Electric Co., Ltd. and Allegro MicroSystems, Inc. assume no

responsibility for its use; nor for any infringements of patents or other rights of third

parties which may result from its use.

™

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

STR84145 [ALLEGRO]

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