U2008B

U2008B TEMIC | Alldatasheet

Document overview

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Technical content

Features

/C0068Full wave current sensing /C0068Mains supply variation compensated /C0068Variable soft-start or load-current sensing /C0068V oltage and current synchronization /C0068Automatic retriggering switchable /C0068Triggering pulse typ. 125 mA /C0068Internal supply-voltage monitoring /C0068Current requirement /C0118 3 mA

Applications

/C0068Low cost motor control /C0068Domestic appliance Block Diagram 96 11643 Automatic retriggering Limiting detector Current detector Full wave load current detector Soft start V oltage detector Phase control unit /C0246 = f (V3) Mains voltage compensation Supply voltage limiting Reference voltage V oltage monitoring R 2 330 k/C0087 22 k/C0087/2W BYT51K R 1 D 1 R 8

1 M /C0087

3.3 nF R 6

230 V ~

–V S C 1 25 V + – ^V (R6) = ±250 mV /C0097max 22 /C0109F/ Figure 1. Block diagram with typical circuit: Load current sensing

Figure 2. Block diagram with typical circuit: Soft start

Rev. A1, 28-May-96 3 (10) Pin Description 95 11405 Isense C ϕ Control GND Output V sync. R ϕ /C0042V S Pin Symbol Function

1 Isense Load current sensing

2 C ϕ Ramp voltage

3 Control Control input / compensation

4 GND Ground

5 –V S Supply voltage

6 R ϕ Ramp current adjustment

7 V sync. V oltage synchronization

8 Output Trigger output

Mains Supply, Pin 5, Figure 2 The integrated circuit U2008B, which also contains voltage limiting, can be connected via D1 and R1 via the mains supply. Supply voltage /C0042 between Pin 4 (pos., /C0259) and Pin 5 /C0042 is smoothed by C1. Series resistance R1 can be calculated as follows: R 1max /C00430.85 x V M –V Smax 2 xI tot whereas V M /C0043Mains voltage V Smax /C0043Maximum supply voltage Itot /C0043ISmax /C0041Ix = Total current compensation The appendix provides further information regarding the design (see figures 10, 11 and 12). An operation with external stabilized DC voltage is not recommended. Voltage Monitoring As the voltage is built up, uncontrolled output pulses are avoided by internal voltage monitoring. Apart from that all the latches in the circuit (phase control, load limit regulation) are reset and the soft-start capacitor is short circuited. This guarantees a specified start-up behavior each time the supply voltage is switched on or after short interruptions of the mains supply. Soft-start is initiated after the supply voltage has been built up. This behavior guarantees a gentle start-up for the motor and automatically ensures the optimum run-up time. Phase Control, Pin 6 The function of the phase control is largely identical to the well known IC family TEA1007. The phase angle of the trigger pulse is derived by comparing the ramp voltage V at Pin 2 with the set value on the control input, Pin 3. The slope of the ramp is determined by C/C0051 and its charging current I /C0246. The charging current can be regulated, changed, altered using R/C0056 at Pin 6. The maximum phase angle, α max, (minimum current flow angle /C0246min) can also be adjusted by using R/C0056 (see figure 4). When the potential on Pin 2 reaches the set point level of Pin 3, a trigger pulse is generated whose pulse width, tp, is determined from the value of C/C0051 (tp = 9 /C0109s/nF, see figure 6). At the same time, a latch is set with the output pulse, as long as the automatic retriggering has not been activated, then no more pulses can be generated in that half cycle. Control input at Pin 3 (with respect to Pin 4) has an active range from –9 V to –1 V . When V 3 = –9 V , then the phase angle is at its maximum α max i.e., the current flow angle is minimum. The minimum phase angle α min is set with V3 /C0119 –1 V . Automatic Retriggering The current-detector circuit monitors the state of the triac after triggering by measuring the voltage drop at the triac gate. A current flow through the triac is recognized, when the voltage drop exceeds a threshold level of typ. 40 mV . If the triac is quenched within the relevant half-wave after triggering; for example owing to low load currents before or after the zero crossing of current wave or; for commu- tator motors, owing to brush lifters. Then the automatic retriggering circuit ensures immediate retriggering, if necessary with a high repetition rate, t pp/tp, until the triac remains reliably triggered.

Rev. A1, 28-May-96 5 (10) Absolute Maximum Ratings V S = 14 V , reference point Pin 4, unless otherwise specified Parameters Symbol Value Unit Current limitation Pin 5 –IS 30 mA t /C0118 /C0049/C0048/C0032/C0109s –iS 100 Sync. currents Pin 7 t /C0118 /C0049/C0048/C0032/C0109s /C0034IsyncV /C0034isyncV mA Phase control Pin 3 Control voltage –V I VS to 0 V Input current /C0034 II 500 /C0109A Charge current Pin 6 – I ϕmax 0.5 mA Load current monitoring / Soft-start Pin 1 Input current II 1 mA Input voltage V I –40 to + 125 V Pulse output Input voltage Pin 8 +V I –V I V S V Storage temperature range Tstg /C004240 to /C0041125 /C0005C Junction temperature range Tj /C004210 to /C0041125 /C0005C Thermal Resistance Parameters Symbol Value Unit Junction ambient DIP8 SO8 on p.c. SO8 on ceramic R thJA 110 220 140 K/W

Electrical Characteristics

V S /C0043 –13 V , Tamb = 25°C, reference point Pin 4, unless otherwise specified Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit Supply Pin 5 Supply voltage limitation–IS = 3.5 mA –IS = 30 mA –V S 14.5 14.6 16.5 16.8 V Current requirement Pins 1, 4 and 7 open –IS 3.0 mA Voltage monitoring Pin 5 Turn-on threshold –V TON 11.3 12.3 V Phase control Input current V oltage sync. Pin 7 Current sync. Pin 8 /C0034IsyncV /C0034IsyncI 3 0.15 2 mA /C0109A V oltage limitation /C0034 IL = 2 mA Pin 7 /C0034V syncV 8.0 8.5 9.0 V

Rev. A1, 28-May-96 6 (10) UnitMax.Typ.Min.SymbolTest Conditions / PinsParameters Reference ramp, figure 4 Charge current Pin 7 I ϕ 1 100 /C0109A Start voltage Pin 2 –V max 1.85 1.95 2.05 V Temperature coefficient of start voltage Pin 2 –TC R –0.003 %/K R ϕ − reference voltage I ϕ = /C0049/C0048 /C0109Α Pins 6 – 5 V R ϕ 0.96 1.02 1.10 V Temperature coefficient I ϕ = /C0049/C0048 /C0109Α Pin 6 I ϕ = /C0049 /C0109Α TC VR ϕ 0.03 0.06 %/K Pulse output, figure 5 Pin 8 Output pulse current V 8 = – 1.2 V R GT = 0 /C0087 I0 100 125 150 mA Output pulse width C 3 = 3.3 nF, VS = Vlimit tp 30 /C0109s Automatic retriggering Pin 8 Turn-on threshold voltage /C0034V ION 20 60 mV Repetition rate I7 /C0119 150 /C0109A tpp 3 5 7.5 tp Soft start, figure 7 Pin 1 Starting current V 1-4 = 8 V I0 5 10 15 /C0109A Final current V 1-4 = –2 V I0 15 25 40 /C0109A Discharge current –I0 0.5 mA Output current Pin 3 –I0 0.2 2 mA Supply voltage compensation, figure 8 Current transfer gain I7/I3 Pins 7, Pin 3 Pins 1 and 2 open G i 14 17 20 Reverse current V (R6) = V3 = V7 = 0 Pin 3 /C0034IR 2 /C0109A Load current detection, V 7 = 0, figure 9 Transfer gain I3/V1 G 0.280 0.320 0.370 /C0109A/mV Offset current V 1 = 0,V3 = –8 V Pin 3 I0 0 3 6 /C0109A Input voltage Pin 1 –V I 300 400 mV Input offset voltage Pin 1 /C0034V 0 6 mV

Rev. A1, 28-May-96 7 (10) 6.8 nF33 nF 100 150 200 250 0 200 400 600 800 1000 Phase angle ( ) R /C0246 ( k/C0087 )96 11797 /C0097° 10 nF 4.7 nF 3.3 nF 2.2 nF C /C0246/ t = 1.5 nF Figure 4. 0 200 400 600 800 120 I ( mA )GT R GT ( /C0087 ) 1000 95 10338

100 Pulse Output

V GT =–1.2V Figure 5. 01 02 0 100 200 300 400 t ( s )p C /C0246 = ( nF ) 95 10339 /C0109 Output Pulse Width /C0068tp//C0068C /C0246=9/C0109s/nF Figure 6. 0 1234 V ( V )1–4 t ( s ) 95 10337 Option Softstart C 5=1/C0109F 4.7/C0109F 10/C0109F Supply R 1=22k/C0087/2W C 1=100/C0109F/25V Figure 7. –2 –1 0 1 200 160 120 I ( A )5 I15 ( mA ) 95 10342 /C0109 Reference Point Pin 10 Mains Supply Compensation Pins 1 and 2 open V s=–13V Figure 8. 0 2468 100 R (k )1max IS ( mA ) 95 10349 /C0087 Max. Series Resistance V M =230V Figure 9.

Rev. A1, 28-May-96 9 (10) Dimensions in mm 94 8873 94 8862

Rev. A1, 28-May-96 10 (10) Ozone Depleting Substances Policy Statement It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances (ODSs). The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency (EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively. TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423