View U217B_1006520.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

U217B
Zero-Voltage Switch with Adjustable Ramp
Description
The integrated circuit, U217B, 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 Simple power control D Ramp generator D Reference voltage
Applications
D Full-wave power control D Temperature regulation D Power blinking switch
D Negative output current pulse typ. 100 mA -
short-circuit protected
Block Diagram
D1 220 kW (250 V~) R2 (Rsync) R1 BYT86/800 18 kW/ 2W Load 1000 W L
C2 2.2 mF/ 10 V R5
R4 100 kW 1
2 Ramp generator
8 Synchronization
5 7 Supply GND 6
C1 100 mF/ 16 V TIC 236N 100 W R3 G
VM = 230 V~ MT2 MT1
15 kW max 100 kW min R6 58 kW
3 4 + + - Comparator Full-wave logic Pulse amplifier
Reference voltage 1.25 V
U217B
N
Figure 1. Block diagram with typical circuit, period group control 0 to 100%
Order Information
Extended Type Number U217B-x U217B-xFP U217B-xFPG3 Package DIP8 SO8 SO8 Remarks Tube Tube Taped and reeled
Rev. A3, 05-Nov-99
1 (11)
U217B
Pin Description
Ramp CRamp 1 2 U217B OP+ 3 OP- 4 6 5
Figure 2. Pinning
8 7
Vsync GND 1 Output 2 VS -VS
U217B
Ramp control
C2
Figure 3. Pin 1 internal network
Pin 1 2 3 4 5 6 7 8
Symbol Ramp CRAmp OP+ OP- VS Output GND Vsync
Function Ramp output Ramp capacitor OP non-inverting input OP inverting input Supply voltage Trigger pulse output Ground Voltage synchronization
t V1 1.4 V Final voltage Vmin Initial voltage Vmax
7.3 V -VS(Pin5)
T
General Description
The integrated circuit U217B 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 full-wave logic guarantees that complete mains cycles are used for load switching. A fire pulse is released when the inverted input of the comparator is negative (Pin 4) with respect to the non-inverted 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.
Figure 4. Threshold voltage of the ramp
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 IGmax IP = IGmax T tp
W
where: = Gate voltage VG 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 identification which can be influenced with the help of sync. resistance, Rsync, (figure 6). tp =
w
2
arc. sin
IL
VM
P2
2 (11)
Rev. A3, 05-Nov-99
U217B
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 Vmin - 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
+V
= IS + IP + Ix
M
2 sin (w 2 )-0.6 V -49 kW 3.5 10-5A
tp
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) = Current requirement of other peripheral Ix components P(R1) = Power dissipation at R1
50
0.10
IL ( mA) 200 100
40 VMains=230VX R1 ( k ) 10000
0.01 10
100
1000 P(W)
W
50
30
20 10 0 0 3 6 9 12 15 Itot ( mA )
Figure 5. Output pulse width
3600 3200 2800 Rsync ( tp ) 2400 2000 1600 1200 800 400 0 0 200 400 600 tp 800 1000 1200 PR1 ( W )
Figure 7. Maximum resistance of R1
6 5 4 3 2 VMains=230VX
Figure 6. Synchronization resistance
1
Supply Voltage
The integrated circuit U217B (which also contains internal voltage limiting) can be connected via the diode (D1) and the resistor (R1) with the mains supply. An internal climb circuit limits the voltage between Pin 5 and 7 to a typical value of 9.25 V.
0 0 3 6 9 12 15 Itot ( mA )
Figure 8. Power dissipation of R1 according to current consumption
Rev. A3, 05-Nov-99
3 (11)
U217B
Absolute Maximum Ratings
Reference point Pin 7 Parameters 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 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 Tamb = 45C Tamb = 100C Junction temperature Operating ambient temperature range Storage temperature range
Thermal Resistance
Parameters Junction ambient Symbol RthJA Value 200 Unit K/W
Electrical Characteristics
-VS = 8.5 V, Tamb = 25C, reference point Pin 7, unless otherwise specified Parameters Supply-voltage limitation Supply current Voltage limitation Synchronous current Zero detector Output pulse width Test Conditions / Pin -IS = 5 mA Pin 5 Pin 5 I8 = 1 mA Pin 8 Pin 8 VM= 230 V, Rsync = 220 kW Rsync = 470 kW V6 = 0 V Pin 6 Symbol -VS -IS VI Isync Isync tP tP -IO VI0 IIB -VIC -VT Min. 8.6 7.5 0.12 35 260 460 100 5 1 1.25 15 1 (VS-1) Typ. 9.25 Max. 9.9 500 8.7 Unit V
mA mA ms ms
V mA
Output pulse current Comparator Input offset voltage Pin 3,4 Input bias current Pin 4 Common-mode input Pin 3,4 voltage Threshold internal V3 = 0 V Pin 4 reference Ramp generator, Pin 1, figure 1 Period -IS= 1 mA, Isync =1 mA, C2 = 1 C1 = 100 R4= 100 kW Final voltage Initial voltage Charge current V2 = 0 V, I8 = -1 mA Pin 2
mA mV
mA
V V
mF,
mF,
T V1 V1 -I2
0.9 6.8 13
1.5 1.40 7.3 17
1.80 7.8 26
mA
s V V
4 (11)
Rev. A3, 05-Nov-99
U217B
Applications
L RL Load VM = 230 V ~ 56 N VDR +5 V 7 6 5
CNY21
270 kW
1N4007
W
18 kW 1.5 W
8
U217B
1 2 3 4 56 kW II 1.5 mA VI
47 10 V
mF/
39 kW
Figure 9. Power switch
D1 C2 220 kW (250 V~) R2 (Rsync) R1 L Load 1000 W
2.2 10 V
mF/
1N4007 18 kW/ 2W
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
R9 150 Rp
W
R7 130 kW
R3
Reference voltage 1.25 V
U217B
N
220 kW
R(25) =100 kW/B =3988
Figure 10. Temperature control 15 to 35C with sensor monitoring NTC-Sensor M 87 Fabr. Siemens
R(15) = 159 kW R(35) = 64.5 kW
R51) determines the proportional range
Rev. A3, 05-Nov-99
5 (11)
U217B
L 0.5 ... 2.2 kW VM= 230 V ~ 100 nF/ 250 V ~ 270 kW BYT86/800
18 kW/ 1.5 W 56
N
82
W
8 7
W
6 5
U217B
1 150 kW 2 3 4 110 kW 0.47 10 V
47
mF/ 16V
mF/
Figure 11. Power blinking switch with f
2.7 Hz, duty cycle 1:1, power range 0.5 to 2.2 kW
6 (11)
Rev. A3, 05-Nov-99
U217B
L Load VM = 230 V ~ R2 IH = 50 mA N 62 W R3 0.35 ... 1.5 kW R1 510 kW R5 680 kW 13 kW/2 W BYT86/800 -DT 1N4148 R4 680 kW
1N4148 8 7 6 5 R16 220 kW
U217B
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 1 mF C2
10 nF
R8 56 kW
Figure 12. Room temperature control with definite reduction (remote control) for a temperature range of 5 to 30C
Rev. A3, 05-Nov-99
7 (11)
U217B
L Load/ 1000 W VM = 230 V ~ 18 kW/ 1.5 W VDR N 56 W 220 kW BYT51G
8
7
6
5 220 kW (680 kW)
U217B
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. A3, 05-Nov-99
U217B
L D1 Load/400 W VM = 230 V~ R1 92 N 18 kW/ 1.5 W Rsync 430 kW BYT51G
W
R3 8 7 6 5 NTC
200 kW
U217B
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 10 V
mF/
68 mF/
10 V
C1
Figure 14. Two-point temperature control for a temperature range of 18 to 32C and a hysteresis of 0.5C at 25C
Rev. A3, 05-Nov-99
9 (11)
U217B
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. A3, 05-Nov-99
U217B
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC Semiconductor 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 Semiconductor 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. TEMIC Semiconductor 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 TEMIC Semiconductors products for any unintended or unauthorized application, the buyer shall indemnify TEMIC Semiconductors 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 Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2594, Fax number: 49 ( 0 ) 7131 67 2423
Rev. A3, 05-Nov-99
11 (11)

▲Up To Search▲

Price & Availability of U217B

	To Download U217B Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .