SL441C ZARLINK | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 5

Technical content

The SL441C is a symmetrical burst control integrated circuit in an 8 pin DIL package. When used with a triac, AC power may be regulated by varying the number of mains cycles applied to the load in a fixed timing period. The device is especially suited to room temperature control applications including panel heaters, fan heaters etc. Zero Voltage Switching has the advantage of minimising radio frequency interference.

FEATURES

n Balanced zero voltage point crossing detector, spike filter and pulse generator for reliable triggering of the triac. n A period pulse generator and bistable which are arranged to provide symmetrical burst control and eliminate 1/2 wave firing. (EN50.006 BS5406,1976) n A ramp generator whose output is used to modify an internal reference voltage which is then compared with the voltage appearing on the thermistor to form a proportional control system. The period of the ramp generator is defined externally and may be chosen to limit 'lamp flicker' in accordance with EN50.006/BS5406, 1976. n The comparison amplifier has inbuilt hysteresis to eliminate switching jitter and a spike filter/ sampling circuit to provide high immunity to both spikes and coherent 50Hz/60Hz. n Thermistor malfunction may be sensed and power automatically removed. n A supply voltage sensing circuit which inhibits firing pulses when the supply is inadequate to guarantee proper circuit operation. This eliminates stressing of the triac at switch-on. Fig.1 Pin Connections (top view) Fig. 2 Block Schematic of SL441C DP8 DS3848 -1.0 ADVANCE INFORMATION

ELECTRICAL CHARACTERISTICS

These Characteristics are guaranteed at the following temperatures (unless otherwise stated). Tamb = +25°C All voltages measured with respect to common (pin 1) Characteristics Min Typ Max Units Shunt regulating voltage pin 3 @ 16mA 14.7 V Shunt regulating voltage pin 3 @ 16mA @ 75°C 16 V Supply voltage trip level pin 3 12.2 V Supply current (less I4AV, I5) (see Note 1) 7.5 mA Regulated voltage pin 5 8.0 8.5 9.0 V Regulated voltage temperature coefficient pin 5 -1 +1 mV/ °C Triac gate drive pin 4 (see Note 2) Open circuit ON voltage 8.5 V Open circuit OFF voltage 0.1 V Output current into 2V drain 100 130 mA Output current into 4V drain 65 80 mA Output current into short circuit 200 mA Internal drain resistance 800 Ω Control input pin 8 Bias current 1 µA Hysteresis 20 mV Sensor malfunction circuit operates at 150 200 250 mV Input working voltage range 0 12 V Internal reference voltage (Ramp start) (see Note 3) 4.0 4.25 4.5 V Internal reference voltage (Ramp finish) (see Note 3) 4.35 V Peak-to-peak amplitude of ramp 70 100 130 mV Pin 6 output impedance (R6) (see Note 2) 21.5 27 32.5 kΩ Maximum ripple voltage pin 3 1 VP-P NOTES 1. The supply current is 0.45 x (RMS current fed into pin 2). I5 is the current drained from pin 5 externally. I4AV is the average triac gate current supplied each mains cycle. 2. Triac firing pulse.tp Pulse width = 0.69 R6CD microseconds typical tf Pulse finish = 1.09 R6CD microseconds minimum after zero voltage point R6 in kohms. CD in nF. See Application circuit tp Nominal (CD = 2.7nF) = 50 microseconds tp Minimum (CD = 2.7nF) = 63 microseconds ABSOLUTE MAXIMUM RATINGS VOLTAGES Voltage on pin V8 - I Max. 12V Voltage on pin V4 - I Max. 10V TEMPERATURE Operating ambient temperature TAMB -10°C to +75°C Storage temperature TSTG -55°C to +150°C CURRENTS Supply current (pin 2) Peak value ± I2M 50mA. Non-repetitive peak current (tp <250µs) ±I2SM 200mA. Output current (pin 5) Max. 5mA Short circuit protected. Output current (pin 4) average value I4 (AV) Max 5mA Short circuit protected

Fig. 3 Power Dissipation Fig. 4 Control Characteristic of Pin 8 Fig. 5 Pulse Timing R thj - a = 200°C/W OPERATIONAL LIMIT 8.5V (V5) 12V ABSOLUTE MAX. RATING 14.7V (V3) CONTROL VOLTAGE (PIN 8) RAMP FINISH 100mV TYP. 4.25V RAMP START 0.2V SENSOR MALFUNCTION CIRCUIT TRIP POINT AVERAGE POWER IN LOAD (%) 8.5V TP = 0.69RC TF = 1.09RC TP = 0.69RC TF = 1.09RC R = PIN 6 OUTPUT IMPEDANCE (R6) C = CD CAPACITOR CONNECTED TO PIN 6

GEC PLESSEY SEMICONDUCTORS Cheney Manor, Swindon, Wiltshire SN2 2QW, United Kingdom. Tel: (0793) 518000 Tx: 449637 Fax: (0793) 518411 GEC PLESSEY SEMICONDUCTORS P.O. Box 66017, 1500 Green Hills Road, Scotts Valley, California 95067-0017, United States of America. Tel (408) 438 2900 ITT Telex: 4940840 Fax: (408) 438 5576 CUSTOMER SERVICE CENTRES

  • FRANCE & BENELUX Les Ulis Cedex Tel: (1) 64 46 23 45 Tx: 602858F Fax : (1) 64 46 06 07
  • GERMANY Munich Tel: (089) 3609 06-0 Tx: 523980 Fax : (089) 3609 06-55
  • ITALY Milan Tel: (02) 66040867 Fax: (02)66040993
  • JAPAN Tokyo Tel: (03) 3296-0281 Fax: (03) 3296-0228
  • NORTH AMERICA Integrated Circuits and Microwave Products, Scotts Valley, USA Tel (408) 438 2900 ITT Tx: 4940840 Fax: (408) 438 7023. Hybrid Products, Farmingdale, USA Tel (516) 293 8686 Fax: (516) 293 0061.
  • SOUTH EAST ASIA Singapore Tel: (65) 3827708 Fax: (65) 3828872
  • SWEDEN Stockolm Tel: 46 8 702 97 70 Fax: 46 8 640 47 36
  • UNITED KINGDOM & SCANDINAVIA Swindon Tel: (0793) 518510 Tx: 444410 Fax : (0793) 518582 These are supported by Agents and Distributors in major countries world-wide. © GEC Plessey Semiconductors 1993 Publication No.DS3848 Issue No. 1.0 June 1993 This publication is issued to provide information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. The Company reserves the right to alter without prior knowledge the specification, design or price of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to the Company's conditions of sale, which are available on request.

Purchase of Zarlink’s I C components conveys a licence under the Philips I C Patent rights to use these components in an I C System, provided that the system conforms to the I C Standard Specification as defined by Philips Zarlink and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 2001, Zarlink Semiconductor Inc. All rights reserved. TECHNICAL DOCUMENTATION - NOT FOR RESALE Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor o r its subsidiaries (collectively “Zarlink”) is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third pa rties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, u nder patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or re produced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their sp ecifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is m ade regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user’s responsibility to fully determine the performance an d suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not n ecessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant i njury or death to the user. All products and materials are sold and services provided subject to Zarlink Semiconductor’s conditions of sale which are available on request. World Headquarters - Canada Tel: +1 (613) 592 0200 Fax: +1 (613) 592 1010 North America - West Coast Tel: (858) 675-3400 Fax: (858) 675-3450 North America - East Coast Tel: (978) 322-4800 Fax: (978) 322-4888 Asia/Pacific Tel: +65 333 6193 Fax: +65 333 6192 Europe, Middle East, and Africa (EMEA) Tel: +44 (0) 1793 518528 Fax: +44 (0) 1793 518581 http://www.zarlink.com