U2350B

U2350B TEMIC | Alldatasheet

Document overview

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Technical content

Features

/C0068Pulse width control up to 30 kHz clock frequency /C0068Mains supply compensation /C0068Current regulation /C0068Temperature monitoring with indicator /C0068Active operation indicator /C0068Blink-warn indicator /C0068Switchable to interval operation /C0068Push-pull output stage for separate supply /C0068Supply voltage monitoring /C0068Temperature compensated supply voltage limitation

Applications

/C0068Domestic equipment /C0068Tools Block Diagram Temperature monitoring Push– pull outputOutput control PWM Control Program logic Current limitation Temperature monitoring LED control Tristate Oscillator V oltage limitation GND 21 16 95 10873 +V S Figure 1. Block diagram

5.6 M/C0087

Figure 2. Block diagram with external circuit

Rev. A1, 29-May-96 3 (9) Pin Description n.c. NTC 95 11409 Progr. R osc C osc Contr. LED1 LED2 OUT OUT– GND IContr. V Contr. +V S OUT+ Pin Symbol Function

1 LED1 LED output 1

2 LED2 LED output 2

3 n.c. Not connected

4 NTC Monitoring input

5 Progr. Tristate programing

6 R osc Resistor for oscillator

7 C osc Capacitor for oscillator

8 Contr. Control input 9 V Contr. V oltage regulation input

10 S1 Switching output, output S1

11 IContr. Current regulation input

12 GND Ground

13 OUT– – supply for output stage

14 OUT Output

15 OUT+ + supply for output stage

Supply, Pin 16 The internal voltage limiter in the U2350B enables a simple supply from the rectified line voltage. The supply voltage between Pin 16 (+V S) and Pin 12 (ground) is built up via R1 and is smoothed by C7. The typically 5 mA supply current is simultaneously used to operate the two LEDs D 2, D3, which can both be bridged internally. The supply current therefore reaches Pin 16 either via LEDs or the internal switches (V sat ≤ 1.2 V). Series resistor, R1, can be calculated as follows: R 1max /C0043V Mmin –V Smax Itot whereas V Mmin /C0043V mains –15% V Smax /C0043maximum supply voltage Itot/C0043ISmax /C0041Ix ISmax /C0043Max. current consumption of the IC Ix /C0043Current consumption of the external components Here, C6 must be selected in this way that the voltage at C 7 (figure 2) is not noticeably affected by the load in any mode of operation. For further information regarding mains power supply, refer to figures 6 and 7. Voltage Monitoring Whilst the operating voltage is being built up or reduced, uncontrolled output pulses of insufficient amplitude are suppressed by the internal monitoring circuit. The latch is also reset, the LED D 2 (operating indicator) between Pin 2 and Pin 16 is switched off and the control input “Pin 8” is connected to ground via switch S 3 and a 1 k/C0087 resistor. In connection with a switching hysteresis of approximately 2 V , this mode of operation guarantees fail-safe start-up each time the operating voltage is switched on, in the same way as after short mains interruptions. Connecting the control input Pin 8 with a capacitor can therefore make a soft start with rapid recovery possible. Pulse Width Control with Mains Voltage Compensation, Pins 8, 9, 10 Average value of the voltage over the load is controlled to an infinitely selectable value by the comparator Comp. 1 with hysteresis. The rectified mains voltage is divided by R3 and R4 and lead in Pin 10. The capacitor C1 is charged via R9 until the voltage V9, which is present at the inverting input of Comp. 1, is more positive than the control voltage V 8 arriving at the non-inverting input via an impedance converter. During the charge time, which is dependent of the mains voltage, the pulse output is at high potential and the switching output Pin 10 is open. If V 9 now becomes greater than V10, the output from Comp. 1 switches over the output stage logic via an AND gate.

Rev. A1, 29-May-96 5 (9) Absolute Maximum Ratings Reference point Pin 12, unless otherwise specified. Parameters Symbol Value Unit Supply Current Pin 16 t ≤ 10 /C0109s IS is mA Push-pull output V 13 ≤ V14 ≤ V15, V15 ≤ V16, V13 ≤ V12 Output current t ≤ 2 ms IO io 200 mA Signal outputs Input current t ≤ 10 /C0109s II ii mA Input currents Pin 6, 8 Pin 10 II 1 mA Input voltages Pin 4, 5, 7, 9, 10, 11 V I 0 V to V16 Storage temperature range Tstg –40 to +125 /C0176C Junction temperature Tj +125 /C0176C Ambient temperature range Tamb –10 to +100 /C0176C Thermal Resistance Parameters Symbol Value Unit Junction ambient DIP16 SO16 on PC board SO16 on ceramic R thJA 120 180 100 K/W K/W K/W

Electrical Characteristics

V S = 15.5 V , Tamb = 25/C0176C, reference point Pin 12, figure 2, unless otherwise specified. Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit Supply voltage limitationIS = 5 mA Pin 16 IS = 20 mA V S 16.2 16.3 17.2 17.8 V Current consumption IS 3.5 mA Voltage monitoring Pin 16 Switch-on threshold V SON 14.0 14.5 V Switch-off threshold V SOFF 12.0 12.5 V Control input Pin 8 Input voltage range V I 0 7.5 V Input quiescent current IIB 250 nA Impedance at lower voltage R I 1 k/C0087 Comparator 1 Pin 9 Input voltage range V IC 0 7.5 V Input quiescent current IIB 250 nA Hysteresis V 8 = 1.5 V Pin 8 – 9V hys 270 300 330 mV Delay time Pin 9 –14td 3 /C0109s

Rev. A1, 29-May-96 6 (9) UnitMax.Typ.Min.SymbolTest Conditions / PinsParameters Switch S1 Pin 10 Leakage current V 10 = 15.5 V , V8 = 3 V , V 9 = 0 V , V11 = 0 V IR 1 /C0109A Saturation voltage I10 = 2 mA, V8 = 0 V , V 9 = 3 V V Sat 0.25 V Delay time Pin 10 – 14 td(r) td(f) /C0109s Comparator 2 Pin 11 Input current II 1 /C0109A Switch-on threshold V TON 1.12 1.20 1.28 V Switch-off threshold V TOFF 1.42 1.50 1.58 V Delay time (output) Pin 11 – 14 td 3 /C0109s Push-pull stage Pin 14 Saturation voltage High side Pin 14 – 16 I14 = –10 mA, V15 = V16 Low side I 14 = 10 mA, V13 = V12 V SatH V SatL 2.4 1.2 V Output current limitationV 14 = V12, V11 = 0 V , V 8 = 3 V , V9 = 0 V , t ≤ 1 /C0109s –IO 100 150 250 mA V 14 = V16 , V8 = 0 V , V 9 = 3 V , t ≤ 1 /C0109s IO 100 150 250 mA Rise time V 15 = V16, V13 = V12, C Gate = 1 nF tr 300 ns Fall time C Gate = 1 nF tf 800 ns Operating indicator I2 = 5 mA Saturation voltage V 16 ≤ VSoff or (V4 ≤ VT100) Pin 2 – 16 V Sat 1.0 V V oltage limitation V 16 ≥ VSon, (V4 > VT100) Pin 2 – 16 V limit 6.6 V Overload outputI I1 = 5 mA Saturation voltage V 4 > VT80 Pin 1 – 2V Sat 1.0 V V oltage limitation V 4 ≤ VT80 Pin 1 – 16V limit 8.6 V Temperature monitoring Pin 4 Input current II 500 nA 80%-threshold V T80 390 420 450 mV 100%-threshold V T100 325 350 375 mV Switch-off threshold V TOFF V S – 1.8 V Operation mode selection Pin 5 V oltage Pin 5 open (I5 = 0) V 5 V S/2 Input current V 5 = V16 II 15 /C0109Ap V 5 = V12 –II 15 /C0109A Oscillator Input current Pin 6 II 1 40 /C0109A Source voltage I6 = – 10 /C0109A Pin 6 V 6 0.9 V Upper saw tooth threshold Pin 7 V Tmax 9 V Lower saw tooth threshold Pin 7 V Tmin 1.8 V

Rev. A1, 29-May-96 8 (9) Dimensions in mm: 94 8875

Rev. A1, 29-May-96 9 (9) 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