SL441C [ZARLINK]
ZERO VOLTAGE SWITCH; 零电压开关
| 型号： | SL441C |
| 厂家： | 
ZARLINK SEMICONDUCTOR INC |
| 描述： | ZERO VOLTAGE SWITCH |
| 文件： | 总5页 (文件大小：88K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SL441C
ADVANCE INFORMATION
DS3848 -1.0
SL441C
ZERO VOLTAGE SWITCH
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
■ Balanced zero voltage point crossing detector,
spike filter and pulse generator for reliable
triggering of the triac.
DP8
Fig.1 Pin Connections (top view)
■ A period pulse generator and bistable which are
■ 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.
■ Thermistor malfunction may be sensed and power
automatically removed.
■ 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.
arranged to provide symmetrical burst control
1
and eliminate
BS5406,1976)
/
wave firing. (EN50.006
2
■ 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.
Fig. 2 Block Schematic of SL441C
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SL441C
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
Shunt regulating voltage pin 3 @ 16mA @ 75°C
Supply voltage trip level pin 3
Supply current (less I4AV, I5) (see Note 1)
Regulated voltage pin 5
14.7
V
V
16
12.2
8.5
V
7.5
9.0
+1
mA
V
8.0
-1
Regulated voltage temperature coefficient pin 5
Triac gate drive pin 4 (see Note 2)
Open circuit ON voltage
mV/ °C
8.5
V
Open circuit OFF voltage
0.1
200
1
V
Output current into 2V drain
100
65
130
80
mA
mA
mA
W
Output current into 4V drain
Output current into short circuit
Internal drain resistance
800
Control input pin 8
Bias current
µA
mV
mV
V
Hysteresis
20
Sensor malfunction circuit operates at
Input working voltage range
150
0
200
250
12
Internal reference voltage (Ramp start) (see Note 3)
Internal reference voltage (Ramp finish) (see Note 3)
Peak-to-peak amplitude of ramp
Pin 6 output impedance (R6) (see Note 2)
Maximum ripple voltage pin 3
4.0
4.25
4.35
100
27
4.5
V
V
70
130
32.5
1
mV
kW
VP-P
21.5
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
3. Ramp period = 0.85 ± 0.15 x RTCT sec. See Application circuit. The actual value of Rt must lie between 500kohms and 3Mohms.
ABSOLUTE MAXIMUM RATINGS
VOLTAGES
Voltage on pin V8 - I Max. 12V
Voltage on pin V4 - I Max. 10V
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
TEMPERATURE
Operating ambient temperature TAMB -10°C to +75°C
Storage temperature TSTG -55°C to +150°C
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SL441C
AVERAGE
POWER
IN LOAD
(%)
Rthj - a = 200°C/W
CONTROL
VOLTAGE
(PIN 8)
14.7V (V3)
0.2V SENSOR
RAMP FINISH
100mV TYP.
MALFUNCTION
CIRCUIT TRIP
POINT
12V ABSOLUTE
MAX. RATING
8.5V (V5)
0V
OPERATIONAL
LIMIT
4.25V RAMP
START
Fig. 3 Power Dissipation
Fig. 4 Control Characteristic of Pin 8
8.5V
TP = 0.69RC
TF = 1.09RC
TP = 0.69RC
TF = 1.09RC
C = CD CAPACITOR
R = PIN 6 OUTPUT
IMPEDANCE (R6)
CONNECTED TO PIN 6
Fig. 5 Pulse Timing
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SL441C
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
HEADQUARTERS OPERATIONS
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
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.
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Tel: (978) 322-4800
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This publication is issued to provide information only and (unless agreed by Zarlink 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. The products, their specifications, services and other information
appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made 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 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. Manufacturing does not necessarily 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 injury 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.
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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
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to the I C Standard Specification as defined by Philips
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Copyright 2001, Zarlink Semiconductor Inc. All rights reserved.
TECHNICAL DOCUMENTATION - NOT FOR RESALE
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