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L9308
DUAL LOW SIDE DRIVER
L9308DUAL LOW SIDE DRIVER
.DARLINGTON OUTPUT STAGE.INPUT COMPARATOR WITH WIDE RANGE
COMMON MODE OPERATIONAND GROUND
COMPATIBLE INPUTS.INPUT COMPARATOR HYSTERESIS.SHORT CIRCUIT PROTECTION OF OUTPUT
WITH SOA PROTECTION.INTERNAL THERMAL PROTECTION WITH
HYSTERESIS .SINGLESUPPLYVOLTAGEFROM3.5VUPTO
28V
DESCRIPTIONThe L9308isa monolithic interface circuit with dif-
ferentialinput comparator and open collectoroutput
ableto sink current specificallyto drive lamps, re-
lays, d.c. motors,electro valves etc.
Particular care has been takento protectthe device
againstdestructive failures- short circuitof outputs VS, SOA protection, supply overvoltage.
BLOCK DIAGRAM
ORDERING NUMBER: L9308
MINIDIP builtin thermal shut-down switchesoff the device
when the IC’s internal dissipation becomes too high
and the chip temperature exceeds the security
threshold.
The input comparatorhysteresisincreases theinter-
face’s noise immunity allowing the correct usein
critical environmentsas automotive applications.
PIN CONNECTION (Top view)
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value UnitIZS Current Into Supply Tamb= 25°C, DC
Clamp Zener Diode Pulsed(*) Supply Voltage 28 V(**) Output Current Internally Limited
Tj,Tstg Junction and Storage Temperature –55to +150 °C
Ptot Power Dissipationat Tamb =85°C 650 mW
(*) TON≤ 2.5ms; repetition time> 30ms.
(**)The maximum allowed supply voltage without limitingresistoris limitedby thebuilt-in protectionzener diode:seeVZS spec.
values.IfVSis higherthanVZSa resistorRSis necessaryto limitthezenercurrentIZS.
THERMAL DATA
Symbol Parameter Value UnitRth j-amb Thermal Resistance Junction-ambient Max 100 °C/W -IN2 Inverting input2 +IN2 Non-inverting input2 OUT2 Output2 GND Ground OUT1 Output1 VST Supply +IN1 Non-inverting input1 -IN1 Inverting input1
L9308
ELECTRICALCHARACTERISTICS (Vs =14.4V; –40°C≤ Tamb,≤ 85°C;RS =100Ω unlessotherwisenoted)
Symbol Parameter Test Conditions Min. Typ. Max. UnitVIH Hysteresisof the Input
Comparater
VIN= 200mVpp;= 1kHz 80 mV Input Bias Current VI+ =VI–=0 0.2 1.0 μA
IOS Input Offset Current VI+ =VI– =0 ±50 ± 400 nA
CMR Input Common Mode Range Vs=6– 18V
Tamb =25°C
0VST–1.6 V
ISC Output Short Circuit Currentfor
Each Channel
(see fig.4)
VIN –VIN> 70mV= 16V
Tamb =25°Cto 85°C
Tamb =– 40°Cto 25°C
VOUT1,2 =6V
VCSAT On Status Saturation Voltage Tamb =– 40°Cto 25°C– –VI+> 70mV
IOUT1,2= 300mA
Tamb =25°Cto 85°C
IOL Output Leakage Current VI– –VI–> 70mV= 18V =5V 300
VST Supply voltage (pin6) 3.5 18 V ”st.by” Supply Current VI+VI–> 70mV 5 8 mA
I”ON” Supply Current VI–VI+> 70mV 18 mA
VZS Voltage Clamp Supply Protection IZS= 10mA 20 27 V
IOmin Minimum Output Current wiyth
the Outputs connected Together
VCSAT= 1.5V 400 mA
Rise Time (seefig.2)
Fall Time
IOUT= 50mA
Tamb =25°C
tdon
tdoff
Delay Timeon
Delay Timeoff
IOUT= 50mA
Tamb =25°C
L9308
Figure1: Switching Time Test Circuit.
Figure2: SwitchingTime Waveformsfor Resis-
tive Loads.
Figure3: Typical Application and Test Circuit.
Notes: a) RSrequiredonlytolimit ΙZS wheneverVS exceedsVZS voltagevalue. C1,C2cut high frequency gain during current limiting.
L9308
Figure4: Typical SOA Characteristic.
L9308
MINIDIP PACKAGE MECHANICAL DATA
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX. 3.32 0.131 0.51 0.020 1.15 1.65 0.045 0.065 0.356 0.55 0.014 0.022 0.204 0.304 0.008 0.012 10.92 0.430 7.95 9.75 0.313 0.384 2.54 0.100 7.62 0.300 7.62 0.300 6.6 0.260 5.08 0.200 3.18 3.81 0.125 0.150 1.52 0.060
L9308
