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TDA3629 Dataheets PDF



Part Number TDA3629
Manufacturers NXP
Logo NXP
Description Light position controller
Datasheet TDA3629 DatasheetTDA3629 Datasheet (PDF)

INTEGRATED CIRCUITS DATA SHEET TDA3629 Light position controller Product specification File under Integrated Circuits, IC18 1996 Sep 04 Philips Semiconductors Product specification Light position controller FEATURES • Low positional error • Low noise sensitivity due to hysteresis • Low supply current • Thermally protected • Broken wire and short-circuit indication on SET input • Brake function by short-circuiting the motor • Hysteresis level set externally. QUICK REFERENCE DATA SYMBOL IP(ss) .

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INTEGRATED CIRCUITS DATA SHEET TDA3629 Light position controller Product specification File under Integrated Circuits, IC18 1996 Sep 04 Philips Semiconductors Product specification Light position controller FEATURES • Low positional error • Low noise sensitivity due to hysteresis • Low supply current • Thermally protected • Broken wire and short-circuit indication on SET input • Brake function by short-circuiting the motor • Hysteresis level set externally. QUICK REFERENCE DATA SYMBOL IP(ss) IP − Im Vm Im ISET Note 1. Steady state implies that the motor is not running (Im = 0) and VSET = VFB = 0.5VP. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TDA3629 TDA3629T DIP8 SO16 DESCRIPTION plastic dual in-line package; 8 leads (300 mil) plastic small outline package; 16 leads; body width 3.9 mm PARAMETER supply current, steady state supply current, motor active output voltage output current motor switch on current level note 1 Im < 900 mA Im < 700 mA VP ≥ 12.3 V VP = 12 V CONDITIONS MIN. − − TYP. − − GENERAL DESCRIPTION TDA3629 The Light position controller (Leucht Weiten Steller, LWS) is a monolithic integrated circuit intended to be used in passenger cars. This device adapts the elevation of the light beam of the head light of the car to a state defined by the car driver using a potentiometer on the dashboard. MAX. 6 80 − − 12 UNIT mA mA V mA µA VP − 2 − .9 670 6 − 9 VERSION SOT97-1 SOT109-1 1996 Sep 04 2 Philips Semiconductors Product specification Light position controller BLOCK DIAGRAM TDA3629 VP1 handbook, full pagewidth VP2 2(5) PROTECTION - OVER VOLTAGE - UNDER VOLTAGE - TEMPERATURE 7(12) SUPPLY TDA3629 SHORT-CIRCUIT ISET BROKEN WIRE SET 8(16) VP 3(6) INPUT STAGE OUT1 FB 1(1) ISET WINDOWS AND COMPARATORS OUTPUT STAGES VP 6(11) OUT2 Iref 5(9) MGE632 Pin numbers in parenthesis represent the TDA3629T. Fig.1 Block diagram. 1996 Sep 04 3 Philips Semiconductors Product specification Light position controller PINNING PIN SYMBOL TDA3629 FB VP1 OUT1 n.c.(1) GND OUT2 VP2 SET Note 1 2 3 4 5 6 7 8 1 5 6 2 to 4, 7, 8, 10, 13 to 15 9 11 12 16 TDA3629T feedback input supply voltage 1 output 1 not connected ground output 2 supply voltage 2 set input TDA3629 DESCRIPTION 1. The pins which are not electrically connected should be connected to a copper area of the printed-circuit board which is as large as possible to improve heat transfer. handbook, halfpage FB n.c. handbook, halfpage 1 2 3 4 16 SET 15 n.c. 14 n.c. 13 n.c. FB VP1 OUT1 n.c. 1 2 8 7 SET VP2 OUT2 GND n.c. n.c. VP1 OUT1 n.c. n.c. TDA3629 3 4 MGE633 TDA3629T 5 6 7 8 MGE634 6 5 12 VP2 11 OUT2 10 n.c. 9 GND Fig.2 Pin configuration TDA3629. Fig.3 Pin configuration TDA3629T. 1996 Sep 04 4 Philips Semiconductors Product specification Light position controller FUNCTIONAL DESCRIPTION The device is intended to control the elevation of the light beam of a head light of a passenger car. The driver can control the elevation of the light beam by rotating a potentiometer on the dashboard (the setting potentiometer). The device adapts the elevation of the light beam by activating the control motor. The elevation of the head light is fed back to the device by a second potentiometer (the feedback potentiometer). This feedback potentiometer is mechanically coupled to the motor. The device operates only when the supply voltage is within certain limits. The device is switched off outside these boundaries. The under voltage detection detects whether the supply voltage is below the under voltage threshold. The motor will not be activated when this occurs, but it remains short-circuited by the output stages. The over voltage will switch off the total device when the supply voltage is higher than the over voltage threshold. A thermal protection circuit becomes active if the junction temperature exceeds a value of approximately 160 °C. This circuit will reduce the motor current, which will result in a lower dissipation and hence a lower chip temperature. This condition will only occur when the motor is blocked at high ambient temperature. A detection of a broken wire of the slider of the setting potentiometer is included because it will be connected to the device by a wire several meters long. This detection circuit prevents the motor from rotating when the wire is broken. In this event the brake will remain active. The protection of VSET to VP circuit prevents the motor from rotating when the voltage at the VSET input is above the threshold value. This can be used to detect whether the wire from the slider of the setting potentiometer is short-circuited to the battery line. A protection of VSET short-circuited to ground is also present. The motor will be stopped if VSET becomes lower than the threshold level. The shaded areas in Fig.4 represent the parts where the short-circuit protection stages are active. Figure 4 shows that a position of 0 mm can not be reached, neither can a position of 100%. The minimum position.


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