TA8020AS TOSHIBA | Alldatasheet

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TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC The TA8020AS is an IC designed for lamp failure detection. When a lamp failure occurs, it detects the resulting lamp current change from the voltage across <> the detection resistor Rs. ee It has a reference voltage characterized by high accuracy ——— and small temperature drift as well as a voltage — 4 comparator. It is also designed to compensate for lamp q l I ll \\ current changes due to supply voltage variations. q i Y | U It consists of two circuits which are supplied with power \\, ] from separate pins. SIP9-P-2.540 FEATURES Weight : 0.92g (Typ.) @ Two circuits served by separate power supplies @ High-performance input amplifier incorporated © Reference voltage characterized by small temperature drift @ Built-in circuit which compensates for lamp voltage characteristic variations @ Operating temperature range : from -40 to 85°C @ Plastic SIP-9 pin BLOCK DIAGRAM AND PIN LAYOUT Cae | | Ca Veco Vecr IN OUT GND OUT IN veer Voce 961001EBA2 @ TOSHIBA is continually working to improve the quality and the reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due, to theit inherent electrical sensitivity and vulnerability to physica stress itis the responsibilty of the buyer, when utlizing TOSHIBA products, to observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product could cause loss of hhuman life, bodily injury or damage to property. In developing. your, designs, please ensure that TOSHIBA products are, used within specified operating ranges as set forth in the most recent products specifications. Also, please keep in mind the precautions and conditions set forth in the TOSHIBA Semiconductor Reliability Handbook. @ The products described in this document are subject to foreign exchange and foreign trade control laws. © The information contained herein is presented only as a. guide for the applications of our products. No responsibility is assumed by, TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. @ The information contained herein is subject to change without notice. 1997-12-01 1/5

| PIN No. | SYMBOL DESCRIPTION Power supply pin dedicated to the output transistor. Since it is connected to Vec2 Vec1 outside the IC, influence of output on/off on the detection voltage is low so that accurate detection is assured. 28 v, Power supply pin for the IC. High accuracy is assured under the condition of ‘ CCl lvcc=8 to 16V. Detection pin which leads to a differential input circuit consisting of a PNP 3,7 transistor. The detected voltage is amplified ten times within the IC. The resulting voltage is fed to the differential-input PNP-transistor comparator. Push-pull output pin which connects to an NPN transistor. When a lamp OUT failure is detected, this signal goes high to flow out a current for driving the external output circuit. [3 _[ @nD [Grounded —SSSCSCSCSCSSCSCCSCSCSY (Note : Operation mode) Input Voltage | Output Mode Neva 1997-12-01 2/5

MAXIMUM RATINGS (Ta = 25°C) CHARACTERISTIC SYMBOL Supply Valtage [Power Dissipation | Pp | 500] mw | iour =03~Vee Operating Temperature -40~85 Storage Temperature =55~150 Lead Temperaturte-time 260 (10s) ELECTRICAL CHARACTERISTICS (Vcc = 12V, Ta= -40 to 85°C) TEST] CHARACTERISTIC SYMBOL | ow [er TEST CONDITION wn. |v. | ax UNIT CUIT Operating Vokage | vee] =| — | Ye Vi [=f 1 [=| of Output Valiage | Vour | our_[— |i wee) = |= [as pv Leakage Current | ~ueax | 0uT | — |Vour =v wf] — [pa [input Curent [in| IN| — |Vcc=12V, Vine T2V [= [vee=3v [a7 [35 | aa | mv . VtH Wee = 16V)/ Detection Voltage AVTH | - | Vr (Vee =9V) 1.32 | 1.36 TIEN = Wee= av ae a re] (Note) : Vec-VouT 1997-12-01 3/5

(1) Detection Voltage Characteristic (VT}y) (2) Output Voltage Characteristic (VQUT) 70, 1.6) s 60 14 & = = % 3 12 A 40) & 10 5 x0 S08 H 3 eo 20 06 10! 0.4) 6 8 wo 2 #4 #16 1 0 5 wo i 2 25 30 Supply Voltage Vcc (V) Output Current Igyt (mA) EXAMPLE OF APPLICATION CIRCUIT (120 Vpeak 200ms LOAD DUMP) Kd (UBS <a) io OI CO Om Om Om Om OMO) Yec2 ouT IN Veer Vec2 Veartery OF ee Gu Rs a 3 Same as the left {somo 2 : GND © 1997-12-01 4/5

SIP9-P-2.54A Unit : mm 3.240.2 al x [sd E wl 2 | N gy ka ~ +04 1,240.1 22.78MAX a [oem wea a ca a 1 9 Weight : 0.92g (Typ.)