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LH1549AACTR, LH1549AB, LH1550

Table of contents:
Info of LH1549AACTR
Info of LH1549AB
Info of LH1550

LH1549AACTR, LH1549AB, LH1550 Selling Leads, Datasheet

MFG:Vishay Package Cooled:SMD-8 D/C:2010+

LH1549AACTR, LH1549AB, LH1550 Datasheet download

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Part Number: LH1549AACTR

MFG: Vishay

Package Cooled: SMD-8

D/C: 2010+

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LH1549AACTR General Description

1 Form A Phototransistor Telecomswitch

LH1549AACTR Maximum Ratings

Parameter	Test condition	Symbol	Value	Unit
LED continuous forward current		I_F	50	mA
LED reverse voltage	I_r10 A	V_R	5.0	V
DC or peak AC load voltage	I_R50 A	V_L	400	V
Continuous DC load curren unidirectional operation		I_L	120	mA
Ambient operating temperature range		T_amb	- 40 to + 85	°C
Storage temperature range		T_stg	- 40 to + 150	°C
Pin soldering temperature	t = 10 s max	T_sld	260	°C
Input/output isolation test voltage		V_ISO	5300	V_RMS
Output power dissipation (continuous)		P_diss	600	mW

LH1549AACTR Features

Solid State Relay
- 1 Form A (LH1525 Type)
- Current-limit Protection
- Clean, Bounce-free Switching
- Low Power Consumption
Solid State Relay and an Autopolarity Optocoupler in a Single Package
Optocoupler
- Bidirectional Current Detection
Surface Mountable
I/O Isolation Voltage, 5300 V_RMSLead-free component
Component in accordance to RoHS 2002/95/EC
and WEEE 2002/96/EC

LH1549AACTR Typical Application

General Telecom Switching
- On/off-hook Control
- Dial Pulse
- Ring-current Detection
- Loop-current sensing

LH1549AB General Description

A Telecom Switch consists of an optically isolated, SPST solid-state relay (SSR) and a bidirectional input optocoupler in a single package. The SSR is ideal for performing switch hook and dial-pulse switching while the optocoupler performs ring detect and loop current sensing functions.

The SSR is integrated on a monolithic receptor die. It features low ON-resistance, high breakdown voltage, and current-limit circuitry that protects the relay from telephone line induced lightning surges.

The optocoupler provides bidirectional current sens- ing via two anti parallel GaAIAs infrared emitting diodes. The optocoupler provides a minimum current transfer ratio (CTR) of 33 %.

LH1549AB Maximum Ratings

Parameter	Test condition	Symbol	Value	Unit
LED continuous forward current		I_F	50	mA
LED reverse voltage	I_r10 A	V_R	5.0	V
DC or peak AC load voltage	I_R50 A	V_L	400	V
Continuous DC load curren unidirectional operation		I_L	120	mA
Ambient operating temperature range		T_amb	- 40 to + 85	°C
Storage temperature range		T_stg	- 40 to + 150	°C
Pin soldering temperature	t = 10 s max	T_sld	260	°C
Input/output isolation test voltage		V_ISO	5300	V_RMS
Output power dissipation (continuous)		P_diss	600	mW

LH1549AB Features

LH1549AB Typical Application

General Telecom Switching
- On/off-hook Control
- Dial Pulse
- Ring-current Detection
- Loop-current sensing

LH1550 General Description

The LH1550 is a single pole single throw (SPST), normally open (NO), solid state relay. The relay can control AC or DC loads currents up to 100 mA, with a supply voltage up to 350 V. The device is packaged in a six pin 0.3 inch dualin line package. This package offers an insulation dielectric withstand of 3750 V_RMS.

The coupler consists of a AlGaAs LED that is optically coupled to a dielectrically isolated photodiode array which drives two series connected high voltage MOS transistors. The typical ON-Resistance is 37 at 25 mA and is linear up to 50 mA. There is built-in current limiting circuitry in the detector chip, enabling it to pass FCC 68-302 and other regulatory voltage surge requirements when over voltage protection is provided.

LH1550 Maximum Ratings

Emitter
Reverse Voltage ..................................................................5.0 V
Continuous Forward Current .............................................50 mA
Peak Forward Current (1s) ..................................................1 A
Power Dissipation............................................................100 mW
Derate Linearly from 25°C........................................1.3 mW/°C
Detector
Output Breakdown Voltage.................................................350 V
Continous Load Current ..................................................100 mA
Total Power Dissipation ..................................................300 mW
Derate Linearly from 25°C.......................................See Figure 4
Package
Isolation Test Voltage.............................................3750 VAC_RMS
Power Dissipation...........................................................400 mW
Derate Linearly from 25°C........................................2.5 mW/°C
Isolation Resistance
VIO=500 V, TA=25°C......................................................1012
VIO=500 V, TA=100°C....................................................1011
Storage Temperature Range ..............................40 to +150°C
Operating Temperature Range..............................40 to +85°C
Junction Temperature....................................................... 100°C
Soldering Temperature, 2 mm from case, 10 sec.............. 260°C

LH1550 Features

• Normally Open, Single Pole Single Throw Operation
• Control 350 VAC or DC Voltage
• Switch 100 mA Loads
• LED Control Current, 2.5 mA
• Low ON-Resistance, 37 Typ. at 100 mA
• Isolation Test Voltage, 3750 VAC_RMS
• Current Limit Protection
• Underwriters Lab File # E52744

LH1550 Typical Application

• Telephone Switch Hook
• High Voltage Test Equipment
• TRIAC Driver
• Motor Control
• Industrial Control Systems

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