VB024 STMICROELECTRONICS | Alldatasheet

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HIGH VOLTAGE IGNITION COIL DRIVER POWER IC n PRIMARY COIL CURRENT INTERNALLY SET n PRIMARY COIL VOLTAGE INTERNALLY SET n AUTOMATIC SHUT-OFF AT MAX CURRENT n LOGIC LEVEL COMPATIBLE INPUT n DIGITAL SIGNAL FEEDBACK TO INDICATE A PREDETERMINED CURRENT LEVEL

DESCRIPTION

The VB024 is a high voltage integrated circuit made using SGS-THOMSON VIPower thecnology, with vertical current flow power darlington and logic level compatible driving circuit. The device performs the following functions: power stage for driving the primary side of the ignition coil, digital signal feedback to the control IC to indicate a predetermined current level, automatic shut-off at maximum current, self clamping for voltage flyback and logic level input. September 1993 BLOCK DIAGRAM ISOWATT7 TYPE V CL IC Id VB024 400 V 8 A 100 mA

Symbol Parameter Value Unit HV C Collector Voltage Internally Limited V IC Collector Current Internally Limited A V d Driving Stage Supply Voltage 16 V Id Driving Circuitry Supply Current 600 mA V in Maximum Input Voltage 10 V V s Control Circuitry Supply Voltage 8 V Is Control Circuitry Supply Current 200 mA Tj Operating Junction Temperature -40 to 150 oC Tstg Storage Temperature Range -55 to 150 oC THERMAL DATA R thj-case Thermal Resistance Junction Case (MAX) 2.5 oC/W R thj-amb Thermal Resistance Junction Ambient (MAX) 30 oC/W CONNECTION DIAGRAM PIN FUNCTION No NAME FUNCTION

1 GND Emitter Power and Control Ground

2 LATCH ENABLE Enables Of The Latch Circuitry Which Turn Off The Driver

3 Vd Supply Voltage For The Power Stage

4 OUT Output to The Primary Coil

5 Vs Supply Voltage For The Control Stage

7 FLAG Output of A Logic Signal When Ic Is Greater Than 3 A

ELECTRICAL CHARACTERISTICS (Vb =1 2V ;Vs = 5 V Regulated; Tj =2 5 oC; Rcoil= 500 mΩ ; Lcoil= 6mH unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit V cl High Voltage Clamp V in =0 . 4V - 4 0oC ≤ Tj ≤ 125 oC3 2 0 5 1 0 V V ce(sat) Saturation Voltage of The Power Stage Ic =6 A ; Id =8 0m A ; Vin =4 V 2 V Is(on) Control Circuit Supply Current 15 mA V s Control Circuit Supply Voltage 4.5 5.5 V Id(on) Driver Stage Stand-by Current V in =4V 1 8 0 m A V d Driver Stage Supply Voltage 5.5 16 V Idiag Diagnostic Current at Wich The Flag Switches -40oC ≤ Tj ≤ 125 oC 2.75 3.35 mA V inH High Level Input Voltage 4 5.5 V V inL Low Level Input Voltage 0 0.2 V IinH High Level Input Current Vin =5 . 5V 2 0 6 0 0 µA V pos Positive Threshold 2.8 3.2 V V neg Negative Threshold 1.3 1.7 V V hys Hysteresis Voltage 1.3 1.7 V Ic(max) Turn-Off Current V in =4V - 4 0oC ≤ Tj ≤ 125 oC7 . 3 8 . 8 A toff Switch-Off Time I c =6A( s e en o t e1 ) 1 0 8 0 µs V diagH High Level Diagnostic Output Voltage R flag=2 0K Ω 44 . 5 V V diagL Low Level Diagnostic Output Volatge R flag= 100 KΩ 0.1 V Note 1: Time fron input switching Vne g until VCL drops to 200 V PRINCIPLE OF OPERATION The VB024 is designed to drive the primary side of an ignition coil and provide a logic signal output to indicate a predetermined coil current level. This output signal is used to perform dwell control. This part is intended for use in Engine Control Modules. It could also be used in an ignition module or integrated into an ignition coil assembly. The VB024 accepts an input High signal from the control IC to start charging the primary side of the ignition coil. When the primary coil current reaches 3 amps, the VB024 outputs a logic High signal to the control IC. This flag signal is used in the calculation of the dwell time. This device also has a maximum primary coil current I c(max) Shut-off feature. Ic(max) equals aproximately 1.5 times the nominal primary coil currnet. If the Ic reaches I c(max), the output stage will Shut-off causing the spark to occour. The VB024 is also internally clamped to protect it from the flyback voltage of the primary inductance as the output stage is turned off. OVERVOLTAGE The VB024 withstand the following transient test performed using a ”Schaffner” equipment at T A = 80 oC: 1) LOAD DUMP Ten pulses with 10 second intervals between each transient. The device withstand load dump while fully on, fully off and during the transition between states (see figures 3 and 4). 2) NEGATIVE TRANSIENTS Ten negative transients with 10 second intervals between each transient (see figure 5). 3) REVERSE BATTERY Inversion of battery voltage for a time = 60 sec (see figure 5). VB024

FIGURE2: Switching Waveforms FIGURE1: Application Circut VB024

DIM. mm inch A 5.35 5.65 0.210 0.222 B 3.4 3.7 0.133 0.145 C 0.8 1.28 0.031 0.050 D 2.95 3.1 0.116 0.122 D1 1.95 2.15 0.076 0.084 E 0.5 0.6 0.019 0.023 F 1.1 0.043 F1 0.7 0.8 0.027 0.031 F2 1.4 0.055 G 4.88 5.28 0.192 0.207 G1 7.42 7.82 0.292 0.308 G2 9.96 10.36 0.392 0.408 H 15.9 16.1 0.626 0.634 L1 19.85 20.15 0.781 0.793 L2 19.35 19.65 0.761 0.773 L3 8.9 9.1 0.350 0.358 L4 28 29 1.102 1.141 L5 4.9 5.1 0.193 0.201 L6 15.9 16.1 0.626 0.634 L7 2.1 2.3 0.082 0.090 L8 23 23.4 0.905 0.921 L9 24.8 25.2 0.976 0.992 L10 19.8 20.2 0.779 0.795 L11 17.7 18.3 0.697 0.720 M 7.83 8.33 0.308 0.328 N 2.75 3.25 0.108 0.128 ∅ 3.5 3.7 0.138 0.145 Dia. A D H L5 L6 F == F1 B C Ø E M N L10 L11 = G = = G1 = = G2 = ISOWATT7 MECHANICAL DATA P033B VB024

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specificationsmentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronicsproducts are not authorized foruse ascritical componentsin life support devices or systems without express written approval of SGS-THOMSON Microelectonics.  1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A VB024