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Technical content

Features

 Signal Line Input Buffer  Input spike filter  Operation from Ignition or Battery line  Ground shift tolerance +/- 1.5 V  Programmable maximum dwell time  Programmable Input Pull down current  Control IGBT current limiting through Vsense pin  Soft Shutdown following Max Dwell Time out

Applications

 The FAN1100-F085 is an advanced Ignition IGBT control IC available in a SO8 package or die sales. This full featured Smart Ignition IGBT Driver is particularly advantageous in “switch on coil” applications where size and system performance of the ignition driver are important.

Description

The FAN1100-F085 is designed to directly drive an ignition IGBT and control the current and spark event of the coil. The coil current is controlled via the input pin. When the input is driven high, the output of the FAN1100-F085 is enabled to turn on the IGBT and start charging the coil. The FAN1100-F085 will sink a current (IIN) into the input pin based on programmed current on the RA line. An input spike filter suppresses input signals of less then 13 µsec in duration. A Max Dwell timer is included in the FAN1100-F085 which will turn off the IGBT if the input stays active for longer than the programmed time. This time interval can be modified through an external capacitor on the CSSD pin. When the Max Dwell timer is exceeded, the FAN1100-F085 will enter a Soft-Shut- Down mode (SSD) slowly dropping the collector current by lowering the gate drive to the IGBT thereby discharging the coil such as to inhibit a spark event. Once the soft shutdown operation has started, any transitions on the input signal are ignored until after completion of the soft shutdown function. The FAN1100- F085 will also limit the collector current of the IGBT to Ic(lim) during charging. This again is done through the sense resistor in the emitter leg of the Ignition IGBT developing a signal input to the Vsense pin of the FAN1100-F085.

Ordering Information

Temperature Range Package Packing Method FAN1100-F085 -40C to 150C 8-SOIC Tape & Reel

Table 1. Recommended External Components Figure 1. Typical Application

www.onsemi.com FAN1100- F085 - Ignition Gate Driver IC Block Diagram

Figure 2. Pin Assignment (Top View)

www.onsemi.com FAN1100- F085 - Ignition Gate Driver IC Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol Parameter Min. Max. Unit Vbat Voltage at Vbat pin (excl. EMC transients) -0.3 28 V VIN Voltage at Input pin with external Rin - 2 16 V VRA, VCSSD Voltage at RA & CSSD and Output pins - 0.3 5 V VOUTPUT Voltage at Gate Output -0.3 6.5 V Vsense Voltage on Vsense pin 0 400 mV TJ , TSTG Operating and Storage Temperature Range -40 150 Pmax Maximum power dissipation (continuous) at TC = 25 °C 0.625 W RΘJA Thermal Resistance junction–case (typical) 200 °C /W VESD (pin to pin) Electrostatic Discharge Voltage (Human Body Model) according to MIL STD 883D, method 3015.7 and EOS/ESD Assn. standard S5.1 - 1993 kV Recommended Operating Conditions (Reference load characteristics) The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Characteristic Min. Typ. Max. Units Ictyp Collector (Coil) Operating Current 12 A Lp Coil Primary Inductance 1.5 mH Rp Coil Primary Resistance (25 °C) 0.4 Ω Rload Load Resistance (for delay time measurements) 2 Ω

www.onsemi.com FAN1100- F085 - Ignition Gate Driver IC

Electrical Characteristics

Symbol Parameter Conditions Min. Typ. Max. Unit Power Supply Conditions Vbat = 6 to 28 V ; TJ= -40 °C to 150 °C (unless otherwise specified) Vbat1 Operating voltage Coil switching function 4 28 V Vbat2 Operating voltage All functions 6 28 V Ibat Supply current TJ=150 °C, Vbat = 28 V, RA open, Input = 5 V 5 mA Vclamp Vbattery clamp Ibatt = 10 mA 35 50 V Sense Pin Conditions Vbat = 6 to 28 V ; TJ= -40 °C to 150 °C (unless otherwise specified) Vlimit Sense Voltage at current limit TJ = -40 °C to 150 °C (Vbat>8V) 185 215 mV Vlimit Sense Voltage at current limit TJ = -40 °C to 150 °C (6V<Vbat<8V) 170 mV Tspike Input spike filter Delay on rising and falling edge of Input 13 µs TD1 Turn on delay time 50% at the input to 10% change at the output 15 µs TD2 Turn off delay time 50% at the input to 10% change at the output 15 µs Input Control Conditions Vbat = 6 to 28 V ; TJ= -40 °C to + 150 °C (unless otherwise specified) VINL Input low voltage 1.2 1.7 V VINH Input high voltage 1.5 2 V VINHys Input voltage hysteresis 0.25 0.6 V IIN Input current ( see fig 6) 0.5 15 mA Gate Output Voltage Max Vbat = 6 to 28 V ; TJ= -40 °C to 150 °C (unless otherwise specified) Vgmax Vgate max 16KΩ pulldown resistor 4.5 5.25 6 V Vglow Vgate low (0mA<Igate<0.4mA @ T=25 °C) 0.0 0.2 V Diagnostic Functions and Protection Vbat = 6 to 28 V ; TJ= -40 °C to 150 °C (unless otherwise specified) RA Resistor for input reference current 5.2 200 kΩ CSSDMIN Minimum dwell time capacitor Note 1 10 nF TDMAX Maximum dwell time (CSSD=20 nF) 30 60 ms ISLEW Soft-Shut-Down slew rate (Ic: 80-20%IClim) 0.7 1.5 2.5 A/ms ICSSD1 CSSD Pin current for TDMAX 0.8 1.25 1.5 µA Note 1. Refer to section Maximum dwell time and soft -shutdown (SSD) _

www.onsemi.com Typical Performance Characteristics Input and spike filter When the input signal voltage reaches VINH, the IGBT will be switched on charging the coil. When the input voltage goes below VINL, the coil current through the IGBT will be turned off. If the FAN1100-F085 is in SSD mode, the input signal control is disabled. After an SSD sequence input control will be re-enabled after the input has reached a valid low. Positive and negative spikes of less than Tspike duration at the input line will be filtered out and will not turn on/off the IGBT. Maximum dwell time and soft-shutdown (SSD) When the IGBT is turned on, a delay timer, dependent on the value of the external CSSD capacitor (see Fig. 5), is started. If a valid falling edge has not been received after the time TDMAX, the IGBT will be turned off slowly as If a valid falling edge is received after the time TDMAX, the edge will be ignored and the soft shutdown will be completed. The IGBT cannot be subsequently turned on until a valid rising edge is detected. If the CSSD capacitor has a value below 2.2 nF or the CSSD pin is shorted to ground, the maximum dwell time and SSD functions are disabled. The maximum dwell time is active for a capacitance value above 10 nF typical. The maxdwell might be indeterminate for capacitance value between 2.2 nF and 10 nF. The maximum dwell time is also disabled in case the input signal is set to high before or at the same time as the battery voltage. It is recommended to apply the battery voltage typically 50 us before the input signal goes high. Figure 4: Dwell time and Soft-Shut-Down

Figure 3. 8-Lead, Small-Outline Integrated Circuit (SOIC), JEDEC MS-012, .150-Inch, Narrow Body B) ALL DIMENSIONS ARE IN MILLIMETERS.

1.75 MAX

0.25 C B A

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