U2010B

U2010B ATMEL | Alldatasheet

Document overview

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Technical content

Features

• Full-wave Current Sensing  Mains Supply Variation Compensated  Programmable Load-current Limitation with Over- and High-load Output  Variable Soft Start  Voltage and Current Synchronization  Automatic Retriggering Switchable  Triggering Pulse Typically 125 mA  Internal Supply-voltage Monitoring  Current Requirement ≤ 3 mA  Temperature-compensated Reference Voltage

Applications

 Advanced Motor Control  Grinder  Drilling Machine 1. Description The U2010B is designed as a phase-control circuit in bipolar technology for motor control applications with load-current feedback and overload protection. It enables load-current detection and has a soft-start function as well as reference voltage output. Figure 1-1. Block Diagram Automatic retriggering Limiting detector Current detector Voltage detector Phase control unit ϕ = f (V4) Mains voltage compensation Reference voltage Voltage monitoring 2 4 Load current detector Full wave rectifier 1 2 Output Programmable overload protection αmax Auto- start B A Imax C 100% 70% Level shift Supply voltageHigh load Soft start 14 13 12 11 3 5 67 8 Overload G N D Pulse output U2010B Phase-control IC with Current Feedback and Overload Protection U2010B Rev. 4766B–INDCO–10/05

4766B–INDCO–10/05 U2010B Figure 1-2. Block Diagram with External Circuit 0.1 µF Autom atic retriggering Lim iting detector Current detector Voltage detector

15 Phase

ϕ = f(V M ains voltage com pensation Reference voltage Voltage m onitoring 116 Load current detector Full wave rectifier Output Program m able overload protection m ax Auto- startBA I m axC 100% 70% Level shift Supply voltage High load Soft start 10 9 180 Ω R Load R

230 V ~

R ^ V (R6) = ±250 m V R Set point C 10 nF P 50 kΩ R R 1 M Ω Overload threshold C R Load current com pensation 0.15 µF C C C 1 µF R m ax R 18 kΩ/2 W R D D

3 LED V

S C M ode A B C S 4.7 µF 22 µF Overload GND α α R U2010B 100 kΩ 3.3 kΩ 3.3 kΩ 330 kΩ 470 kΩ

4766B–INDCO–10/05 U2010B 2. Pin Configuration Figure 2-1. Pinning DIP16/SO16 Cϕ CONTROL COMP ILOAD CSOFT VREF ISENSE VRϕ OVERLOAD HIGH LOAD VS GND MODE OUTPUT VSYNC U2010B ISENSE Table 2-1. Pin Description Pin Symbol Function

1 ISENSE Load current sensing

2 ISENSE Load current sensing

3C ϕ Ramp voltage

4 CONTROL Control input

5 COMP Compensation output

6 ILOAD Load current limitation

7 CSOFT Soft start

8 VREF Reference voltage

9 MODE Mode selection

10 GND Ground

11 VS Supply voltage

12 HIGH LOAD High load indication

13 OVERLOAD Overload indication

14 VR ϕ Ramp current adjust

15 VSYNC Voltage synchronization

16 OUTPUT Trigger output

4766B–INDCO–10/05 U2010B 3. General Description

3.1 Mains Supply

The U2010B contains voltage limiting and can be connected with the mains supply via D 1 and R1. Supply voltage – between pin 10 and pin 11 – is smoothed by C 1. In the case of V 6 ≤ 70% of the overload threshold volt age, pins 11 and 12 are connected inter- nally whereby Vsat ≤ 1.2 V. When ⏐ V6⏐ ≥ ⏐ VT70⏐ , the supply current flows across D3. The series resistance R1 can be calculated as follows: where: Vmains = Mains supply voltage VSmax = Maximum supply voltage Itot = Total current consumption = I Smax + Ix ISmax = Maximum current consumption of the IC Ix = Current consumption of the external components

3.2 Voltage Monitoring

When the voltage is built up, uncontrolled output pulses are avoided by internal voltage monitor- ing. Apart from that, all 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 ini- tiated 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.

3.3 Phase Control

The function of the phase control is mainly i dentical to the well-known IC U211B. The phase angle of the trigger pulse is derived by comparing the ramp voltage V 3, which is mains-synchro- nized by the voltage detector, with the set value on the control input, pin 4. The slope of the ramp is determined by Cϕ and its charging current Iϕ. The charging current can be varied using Rϕ at pin 14. The maximum phase angle, α max, can also be adjusted by using Rϕ (minimum cur- rent flow angle ϕmin), see Figure 7-1 on page 10. When the potential on pin 3 reaches the set point level of pin 4, a trigger pulse width, tp, is deter- mined from the value of C ϕ (tp = 9 µs/nF). At the same time, a latch is set with the output pulse as long as the automatic retriggering has not been activated. When this happens, no more pulses can be generated in that half cycle. The control input at pin 4 (with respect to pin 10) has an active range from V 8 to -1 V. When V4 = V8, then the phase angle is at its maximum, αmax, i.e., the current flow angle is minimum. The minimum phase angle, αmin, is set with V4 ≥ -1 V. R1max Vmains VSmax–

4766B–INDCO–10/05 U2010B

3.4 Automatic Retriggering

The current-detector circuit monitors the state of the triac after triggering by measuring the volt- age drop at the triac gate. A current flow through the triac is recognized when the voltage drop exceeds a threshold level of typically 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 the current wave, or for commutator motors, owing to brush lifters), the automatic retriggeri ng circuit ensures immediate retriggering, if nec- essary with a high repetition rate, tpp/tp, until the triac remains reliably triggered.

3.5 Current Synchronization

Current synchronization fulfils two functions: – Monitoring the current flow after triggering. In case the triac extinguishes again or does not switch on, automatic triggering is activated until the triggering is successful. – Avoiding triggering due to an inductive load. In the case of inductive load operation, the current synchronization ensures that in the new half wave, no pulse will be enabled as long as there is a current available from the previous half wave, which flows from the opposite polarity to the actual supply voltage. The current synchronization as described above is a special feature of the U2010B. The device evaluates the voltage at the pulse output between gate and reference electrode of the triac. As a result, no separate current synchronization input with specified series resistance is necessary.

3.6 Voltage Synchronization wi th Mains Voltage Compensation

The voltage detector synchronizes the reference ramp with the mains supply voltage. At the same time, the mains-dependent input current at pin 15 is shaped and rectified internally. This current activates the automatic retriggering and at the same time is available at pin 5. By suit- able dimensioning, it is possible to obtai n the specified compensation effect. Automatic retriggering and mains voltage compensation are not activated until ⏐ V15 - 10⏐ increases to 8 V. The resistance Rsync. defines the width of the zero voltage cross over pulse, synchronization cur- rent, and hence the mains supply voltage compensation current. Figure 3-1. Suppression of Mains Voltage Compensation and Automatic Retrigger If the mains voltage compensation and the automatic retriggering are not required, both func- tions can be suppressed by limiting ⏐ V15 - 10⏐ ≤ 7 V, see Figure 3-1. 2 x C6V2 Mains U2010B

4766B–INDCO–10/05 U2010B

3.7 Load-current Compensation

The circuit continuously measures the load current as a voltage drop at resistance R6. The eval- uation and use of both half waves results in a quick reaction to load-current change. Due to the voltage at resistance R6, there is a difference between both inpu t currents at pins 1 and 2. This difference controls the internal current source , whose positive current values are available at pins 5 and 6. The output current generated at pin 5 contains the difference from the load-current detection and from the mains voltage compensation, see Figure 1-2 on page 2. The efficient impedance of the set-point network generates a voltage at pin 4. A current, flowing out of pin 5 through R 10, modulates this voltage. An increase of mains voltage causes the increase of control angle α, an increase of load current results in a decrease in the control angle. This avoids a decrease in revolution by increasi ng the load as well as an increase of revolution by the increment of the mains supply voltage.

3.8 Load-current Limitation

The total output load current is available at pin 6. It results in a voltage drop across R 11. When the potential of the load current reaches about 70% of the threshold value (VT70), i.e., about 4.35 V at pin 6, it switches the high-load compar ator and opens the switch between pins 11 and 12. By using an LED between these pins (11 and 12), a high-load indication can be realized. If the potential at pin 6 increases to about 6.2 V (= V T100), it switches the overload comparator. The result is programmable at pin 9 (operation mode).

3.8.1 Mode Selection

a) αmax (V9 = 0) In this mode of operation, pin 13 switches to -VS (pin 11) and pin 6 to GND (pin 10) after V6 has reached the threshold VT100. A soft-start capacitor is then shorted and the control angle is switched to αmax. This position is maintained until the supply voltage is switched off. The motor can be started again with the soft-start function when the power is switched on again. As the overload condition switches pin 13 to pin 11, it is possible to use a smaller control angle, αmax, by connecting a further resistance between pins 13 and 14. b) Auto start (pin 9 – open), see Figure 7-8 on page 12 The circuit behaves as described above, with the exception that pin 6 is not connected to GND. If the value of V6 decreases to 25% of the threshold value (VT25), the circuit becomes active again with soft start. c) I max (V9 = V8), see Figure 7-10 on page 13 When V6 has reached the maximum overload threshold value (i.e., V6 = VT100), pin 13 is switched to pin 8 (VRef) through the resistance R (= 2 kΩ) without the soft-start capacitor discharging at pin 7. With this mode of operation, direct load-current control (Imax) is possible.

4766B–INDCO–10/05 U2010B 4. Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Reference point pin 10, unless otherwise specified. Parameters Pin Symbol Value Unit Sink current t ≤ 10 µs 11 -I S 30 mA 11 -i s 100 mA Synchronous currents t ≤ 10 µs 15 ±I syncV 5m A 15 ±i syncV 5m A Phase Control Control voltage 4, 8 -V I 0 - V8 V Input current 4 ±I I 500 µA Charging current 14 -I j†max 0.5 mA Soft Start Input voltage 7, 8 -V I 0 - V8 V Pulse Output Input voltage 16 +VI -VI V11 V V Reference Voltage Source Output current t ≤ 10 µs 0 10 mA 8I 0 30 mA Load-current Sensing Input currents 1, 2 ±I i 1m A Input voltages 5, 6 - Vi 0 - V8 V Overload output 13 I L 1m A High-load output t ≤ 10 µs

12 I L 30 mA

12 I L 100 mA

Storage temperature range T stg -40 to +125 °C Junction temperature range T j 125 °C Ambient temperature range T amb -10 to +100 °C 5. Thermal Resistance Parameters Symbol Value Unit Junction ambient DIP16 SO16 on p.c. SO16 on ceramic RthJA RthJA RthJA 120 180 100 K/W K/W K/W

4766B–INDCO–10/05 U2010B 6. Electrical Characteristics Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Supply 11 Supply-voltage limitation -IS = 3.5 mA -IS = 30 mA -VS -VS 14.5 14.6 16.5 16.8 V V Current requirement -V S = 13.0 V 1, 2, 8 and 15 open -IS 3.6 mA Reference Voltage Source 8 Reference voltage I L = 10 µA IL = 2.5 mA -VRef -VRef 8.6 8.4 8.9 8.8 9.2 9.1 V V Temperature coefficient IS = 2.5 mA IS = 10 µA TCVRef TCVRef -0.004 +0.006 %/K %/K Voltage Monitoring 11 Turn-on threshold -V Son 11.3 12.3 V Phase Control Synchronization 15 Input current Voltage sync. ±I syncV 0.15 2 mA Voltage limitation ±I L = 2 mA ±V syncV 8.0 8.5 9.0 V Input current Current synchronization 16 ±I syncI 33 0 µ A Reference Ramp, see Figure 7-1 on page 10 Charging current 14 -I ϕ 1 100 µA Start voltage 3 -V max 1.85 1.95 2.05 V Temperature coefficient of start voltage 3T C R -0.003 %/K Final voltage 3 -V min (V8 ± 200 mV) Rϕ - reference voltage I ϕ = 10 µA 11, 14 V Rϕ 0.96 1.02 1.10 V Temperature coefficient Iϕ = 10 µA Iϕ = 1 µA 14 TCVRϕ TCVRϕ 0.03 0.06 %/K %/K Pulse output current V16 = -1.2 V, Figure 7-2 on page 10 16 I 0 100 125 150 mA Output pulse width VS = Vlimit C3 = 3.3 nF , see Figure 7-3 on page 10 16 t p 30 µs Automatic Retriggering Repetition rate I 15 ≥ 150 µA t pp 35 7 . 5 t p Threshold voltage 16 ±V I 20 60 mV Soft Start, see Figure 7-4 and Figure 7-5 on page 11 7 Starting current V 7 = V8 -I0 51 0 1 5 µ A Final current V 7-10 = -1V -I 0 15 25 40 µA Discharge current +I 0 0.5 mA Output current 4 +I 0 0.2 2 mA Mains Voltage Compensation, see Figure 7-6 on page 11 15 Transfer gain I 15/I5 (1 and 2 open) Gi 14 17 20 Output offset current V (R6) = V15 = V5 = 0 ±I 0 2µ A

4766B–INDCO–10/05 U2010B Figure 7-15. Application Circuit Autom atic retriggering Lim iting detector Current detector Voltage detector M ains voltage com pensation Reference voltage Voltage m onitoring 116 Load current detector Full wave rectifier Output Program m able overload protection m ax Auto- startBA I m axC 100% 70% Level shift Supply voltage High load Soft start 10 9 180 Ω R Load R 3.3 kΩ R ^ V (R6) = ±250 m V 3.3 kΩ R C 10 nF P 50 kΩ R 8.2 kΩ R 1 M Ω Overload threshold C 0.1 µF R 100 kΩ Load current com pensation 0.15 µF C C 4.7 µF C 1 µF R 470 kΩ m ax R 330 kΩ 18 kΩ/2 W R D D LED V S C 22 µF A B C S R 1 M Ω m ax N D 1N4148 R 100 kΩ C 1 µF R 220 kΩ L GND Overload αα α Set point R U2010B ϕ = f(V

4766B–INDCO–10/05 U2010B 9. Package Information 8. Ordering Information Extended Type Number Package Remarks U2010B-xY DIP16 Tube, Pb-free U2010B-xFPY SO16 Tube, Pb-free U2010B-xFPG3Y SO16 Taped and reeled, Pb-free Dimensions in mm 0.5 min 1.64 1.44 technical drawings according to DIN specifications 20.0 max 4.8 max 3.3 7.82 7.42 6.4 max 0.39 max 9.75 8.150.58 0.48 2.54 17.78Alternative 16 9

4766B–INDCO–10/05 U2010B 10. Revision History technical drawings according to DIN specifications Dimensions in mm 10.0 9.85 8.89 0.4 1.27 1.4 0.25 0.10 5.2 4.8 3.7 3.8 6.15 5.85 0.2 16 9 Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. History 4766B-INDCO-08/05

• Put datasheet in a new template
• First page: Pb-free logo added
• Page 16: Ordering Information changed

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