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| T2117 Zero-Voltage Switch with Adjustable Ramp Description The integrated circuit, T2117, is designed as a zerovoltage switch in bipolar technology. It is used to control resistive loads at mains by a triac in zero-crossing mode. A ramp generator allows power control function by period group control, whereas full-wave logic guarantees that full mains cycles are used for load switching. Features D Direct supply from the mains D Current consumption 0.5 mA D Very few external components D Full-wave drive - no DC current component in the load circuit D Negative output current pulse typ. 100 mA - short-circuit protected D Simple power control D Ramp generator D Reference voltage Applications D Full-wave power control D Temperature regulation D Power blinking switch Block Diagram D1 220 kW (250 V~) R2 (Rsync) R1 BYT41M 18 kW/ 2W -VS 2 1 R5 12 kW max 100 kW min R6 18 kW N Reference voltage 1.4 V 3 4 + + - Comparator 6 Full-wave logic Pulse amplifier R3 Ramp generator 8 Synchronization 5 7 Supply GND C1 100 mF/ 16 V TIC 236N 100 W VM = 230 V~ MT2 MT1 Load 1000 W L C2 2.2 mF/ 10 V R4 100 kW T2117 Figure 1. Block diagram with typical circuit, period group control 0 to 100% Ordering Information Extended Type Number T2117-3AS T2117-TAS T2117-TAQ Package DIP8 SO8 SO8 Tube Tube Taped and reeled Remarks Rev. A2, 17-Dec-01 1 (11) T2117 Pin Description Ramp CRamp POSIN NEGIN 1 2 T2117 3 4 6 5 Figure 2. Pinning 8 7 Vsync GND 1 Output R4 VS -VS 2 T2117 Ramp control C2 Figure 3. Pin 1 internal network Pin 1 2 3 4 5 6 7 8 Symbol Ramp CRamp POSIN NEGIN VS Output GND Vsync Function Ramp output Ramp capacitor Non-inverting comparator input Inverting comparator input Supply voltage Trigger pulse output Ground Voltage synchronization Figure 4. Threshold voltage of the ramp at VS = -8.8 V t V1 -1.6 V Final voltage Vmin Initial voltage Vmax -7.6 V T General Description The integrated circuit T2117 is a triac controller for zerocrossing mode. It is designed to control power in switching resistive loads of mains supplies. Information regarding supply sync. is provided at Pin 8 via resistor RSync. To avoid DC load on the mains, the fullwave logic guarantees that complete mains cycles are used for load switching. A fire pulse is released when the inverting input of the comparator is negative (Pin 4) with respect to the noninverting input (Pin 3) and internal reference voltage. A ramp generator with free selectable duration can be performed by capacitor C2 at Pin 2. The ramp function is used for open-loop control (figure 4), but also for application with proportional band regulation (figure 11). Ramp voltage available at capacitor C2 is decoupled across the emitter follower at Pin l. To maintain the lamp flicker specification, ramp duration is adjusted according to the controlling load. In practice, interference should be avoided (temperature control). Therefore, a two-point control is preferred to proportional control. One can use internal reference voltage for simple applications. In that case, Pin 3 is inactive and connected to Pin 7 (GND), see figure 13. Triac Firing Current (Pulse) This depends on the triac requirement. It can be limited with gate series resistance which is calculated as follows: RGmax 7.5 V - VGmax - 36 W IGmax IP = IGmax T tp where: VG = Gate voltage IGmax = Maximum gate current Ip = Average gate current tp = Firing pulse width T = Mains period duration Firing Pulse Width tp (Figure 5) This depends on the latching current of the triac and its load current. The firing pulse width is determined by the zero-crossing detection which can be influenced with the help of sync. resistance, Rsync, (figure 6). tp = 2 w arc. sin IL VM P2 2 (11) Rev. A2, 17-Dec-01 T2117 whereby: = IL VM = P = Latching current of the triac Mains supply, effective Power load (user's power) The series resistance R1 can be calculated (figures 7 and 8) as follows: R1max = 0.85 Itot VMmin - VSmax ; P(R1) = 2 Itot (VM - VS)2 2 R1 Total current consumption is influenced by the firing pulse width which can be calculated as follows: R sync + VM 2 sin (w 2 ) * 0.6 V * 49 kW 3.5 10 * 5A tp = IS + IP + Ix 10.00 VMains = 230 V 1.00 t p ( ms ) whereby: VM = Mains voltage VS = Limiting voltage of the IC Itot = Total current consumption IS = Current requirement of the IC (without load) Ix = Current requirement of other peripheral components P(R1) = Power dissipation at R1 50 0.10 IL ( mA) 200 40 VMains=230VX R 1 ( kW ) 30 100 0.01 10 50 100 1000 P(W) 10000 20 10 0 Figure 5. Output pulse width 2000 VMains = 230 V 1600 Rsync ( kOhm ) 1200 0 3 6 9 12 15 Itot ( mA ) Figure 7. Maximum resistance of R1 6 800 5 400 0 0 200 400 600 800 1000 1200 1400 tp ( ms ) PR1 ( W ) 4 3 2 1 0 0 3 6 9 12 15 Itot ( mA ) VMains=230VX Figure 6. Synchronization resistance Supply Voltage The T2117 contains voltage limiting and can be connected with the mains supply via the diode D1 and the resistor R1. Supply voltage between Pin 5 and 7 is limited to a typical value of 9.5 V. Figure 8. Power dissipation of R1 according to current consumption Rev. A2, 17-Dec-01 3 (11) T2117 Absolute Maximum Ratings Parameter Supply current Sync. current Output current ramp generator Input voltages Pin 5 Pin 8 Pin 1 Pin 1, 3, 4, 6 Pin 2 Pin 8 Tamb = 45C b Tamb = 100C Junction temperature Operating ambient temperature range Storage temperature range Symbol -IS ISync. IO -VI -VI VI Ptot Ptot Tj Tamb Tstg Value 30 5 3 VS 2 to VS 7.3 400 125 125 0 to 100 -40 to + 125 Unit mA mA mA V V V mW mW C C C Power dissipation Thermal Resistance Parameter Junction ambient Junction ambient SO8 DIP8 Symbol RthJA RthJA Value 200 110 Unit K/W K/W Electrical Characteristics -VS = 8.8 V, Tamb = 25C, reference point Pin 7, unless otherwise specified Parameter Supply-voltage limitation Supply current Voltage limitation Synchronization current Zero detector Output pulse width VM= 230 V, Rsync = 220 kW Rsync = 470 kW V6 = 0 V I8 = 1 mA Test Conditions / Pins -IS = 1 mA -IS = 10 mA Pin 5 Pin 5 Pin 5 Pin 8 Pin 8 Pin 8 Pin 6 Pin 6 Pin 6 Symbol -VS -VS -IS VI Isync Isync tP tP -IO VI0 IIB -VIC -VRef 1 1.4 100 7.7 0.12 35 260 460 8.2 Min. 9.0 9.1 Typ. 9.5 9.6 Max. 10.0 10.1 500 8.7 Unit V V mA V mA mA ms ms mA Output pulse current Comparator Input offset voltage Input bias current Common-mode input voltage Threshold internal reference Pin 3,4 Pin 4 Pin 3,4 V3 = 0 V Pin 4 15 1 (VS-1) mV mA V V 4 (11) Rev. A2, 17-Dec-01 T2117 Electrical Characteristics (continued) -VS = 8.8 V, Tamb = 25C, reference point Pin 7, unless otherwise specified Parameter Ramp generator, figure 1 Period -IS= 1 mA, isync =1 mA, C1 = 100 mF, C2 = 2.2 mF, R4= 100 kW Pin 1 Pin 1 Pin 1 V2 = -VS, I8 = -1 mA, Pin 2 Test Conditions / Pins Symbol Min. Typ. Max. Unit T -V1 -V1 -I2 1.2 7.2 14 1.5 1.6 7.6 20 2.0 8.0 26 s V V mA Final voltage Initial voltage Charge current Applications L 0.5 ... 2.2 kW VM= 230 V ~ 100 nF/ 250 V ~ 270 kW BYT41M 18 kW/ 1.5 W 56 W N 82 W 8 7 6 5 T2117 1 150 kW 47 mF/ 16V 2 3 4 110 kW 0.47 mF/ 10 V Figure 9. Power blinking switch with f 2.7 Hz, duty cycle 1:1, power range 0.5 to 2.2 kW Rev. A2, 17-Dec-01 5 (11) T2117 L RL Load VM = 230 V ~ 56 W N VDR +5 V 7 6 5 CNY21 270 kW BYT41M 18 kW 1.5 W 8 T2117 1 2 3 4 56 kW 47 mF/ 10 V 39 kW II 1.5 mA VI Figure 10. Power switch D1 2.2 mF/ 10 V C2 220 kW (250 V~) R2 (Rsync) R1 BYT41M 18 kW/ 2W Load 1000 W L R8 470 kW BC237 NTC/M87 B value = 3988 R(25) 100 kW R6 100 kW R4 100 kW 1 R5 1) 2 Ramp generator 8 Synchronization 5 7 Supply C1 VM = 230 V~ 3 4 + + - 6 Full-wave logic Comparator Pulse amplifier 100 W R3 R9 150 W Rp 220 kW R7 130 kW Reference voltage 1.4 V T2117 N R(25) =100 kW/B =3988 R(15) = 159 kW R(35) = 64.5 kW Figure 11. Temperature control 15 to 35C with sensor monitoring NTC-Sensor M 87 Fabr. Siemens R51) determines the proportional range 6 (11) Rev. A2, 17-Dec-01 T2117 L Load VM = 230 V ~ 0.35 ... 1.5 kW R1 510 kW BYT41M -DT 1N4148 R4 680 kW R5 R2 R3 IH = 50 mA N 62 W 680 kW 13 kW/2 W 1N4148 8 7 6 5 R16 220 kW T2117 R6 9.1 kW R7 1 R10 910 kW R9 12 kW C5 C4 100 mF/ 12 V 47 mF 2 3 C3 4 12 kW R15 25 kW C1 NTC 33 kW 2.2 mF C2 1 mF 10 nF R8 56 kW Figure 12. Room temperature control with definite reduction (remote control) for a temperature range of 5 to 30C Rev. A2, 17-Dec-01 7 (11) T2117 L Load/ 1000 W VM = 230 V ~ 18 kW/ 1.5 W VDR N 56 W 220 kW BYT41M 8 7 6 5 220 kW (680 kW) T2117 1 2 3 4 500 kW (2 MW) 10 nF 68 mF/ 10 V 50 kW (200 kW) NTC Figure 13. Two-point temperature control for a temperature range of 15 to 30C 8 (11) Rev. A2, 17-Dec-01 T2117 L D1 Load/400 W VM = 230 V~ R1 92 W N R3 8 7 6 5 NTC 18 kW/ 1.5 W Rsync 430 kW BYT41M 200 kW T2117 D2 1N4148 1 2 3 4 R6 R15/ 50 kW 27 kW 330 kW R5 R7/ 8.2 kW R4/ 39 kW C2 150 nF C3 33 mF/ 10 V C1 68 mF/ 10 V Figure 14. Two-point temperature control for a temperature range of 18 to 32C and a hysteresis of 0.5C at 25C Rev. A2, 17-Dec-01 9 (11) T2117 Package Information Package DIP8 Dimensions in mm 9.8 9.5 1.64 1.44 7.77 7.47 4.8 max 6.4 max 0.5 min 0.58 0.48 7.62 8 5 2.54 3.3 0.36 max 9.8 8.2 technical drawings according to DIN specifications 1 4 Package SO8 Dimensions in mm 5.00 4.85 1.4 0.4 1.27 3.81 8 5 0.25 0.10 0.2 3.8 6.15 5.85 5.2 4.8 3.7 technical drawings according to DIN specifications 1 4 10 (11) Rev. A2, 17-Dec-01 T2117 Ozone Depleting Substances Policy Statement It is the policy of Atmel Germany 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. Atmel Germany GmbH 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. Atmel Germany GmbH 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 Atmel products for any unintended or unauthorized application, the buyer shall indemnify Atmel 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. Data sheets can also be retrieved from the Internet: http://www.atmel-wm.com 2. Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423 Rev. A2, 17-Dec-01 11 (11) |
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