L9949 ,DOOR ACTUATOR DRIVERL9949DOOR ACTUATOR DRIVER■ ONE FULL BRIDGE FOR 6A LOAD (r = 150mΩ)onMULTIPOWER BCD60III TECHNOLOGY■ ..
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L9949-TR ,DOOR ACTUATOR DRIVERL9949DOOR ACTUATOR DRIVER■ ONE FULL BRIDGE FOR 6A LOAD (r = 150mΩ)onMULTIPOWER BCD60III TECHNOLOGY■ ..
L9950 ,DOOR ACTUATOR DRIVERL9950DOOR ACTUATOR DRIVER1
L9950TR ,DOOR ACTUATOR DRIVERFEATURES Figure 1. Package■ One full bridge for 6A load (r = 150mΩ )on■ Two half bridges for 3A loa ..
L9950-TR ,DOOR ACTUATOR DRIVERL9950DOOR ACTUATOR DRIVER1
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L9949
DOOR ACTUATOR DRIVER
L9949 ONE FULL BRIDGE FOR 6A LOAD (ron= 150mΩ) THREE HALF BRIDGES FOR 1.6A LOAD
(ron= 800mΩ) ONE HIGHSIDE DRIVER FOR 6A LOAD
(ron= 100mΩ) VERY LOW CURRENT CONSUMPTION IN
STANDBY MODE (IS < 6μA, typ. Tj ≤ 85°C) SERIAL PERIPHERAL INTERFACE (SPI) TO
MICROCONTROLLER ALL OUTPUTS SHORT CIRCUIT PROTECTED CURRENT MONITOR OUTPUT FOR FULL
BRIDGE AND HIGHSIDE DRIVER ALL OUTPUTS OVER TEMPERATURE
PROTECTED OPEN LOAD DIAGNOSTIC FOR ALL OUTPUTS OVERLOAD DIAGNOSTIC FOR ALL OUTPUTS
APPLICATIONS FOR AUTOMOTIVE APPLICATIONS, E.G.
FULL BRIDGE FOR DOOR LATCH OR
MIRROR RETRACT, HALF BRIDGES FOR
MIRROR AXIS CONTROL AND HIGH-SIDE
DRIVER FOR MIRROR DEFROSTER
DESCRIPTIONThe L9949 is a microprocessor controlled power in-
terface for automotive applications. It is realized in
multipower BCD60III technology. Up to three DC mo-
DOOR ACTUATOR DRIVER
L9949 tors and one grounded resistive load can be driven with its three half bridges, one full bridge and one highside
driver power outputs. The integrated standard serial peripheral interface (SPI) controls all operation modes (for-
ward, reverse, brake and high impedance). All diagnostic informations are available via the SPI.
Dual Power Supply: VS and VCCThe power supply voltage VS supplies the full bridge, the half bridges and the highside driver. An internal
charge-pump are used to drive the highside switches. The logic supply voltage VCC (stabilized 5V) is used for
the logic part and the SPI of the device. Due to the independent logic supply voltage the control and status in-
formation will not be lost, if there are temporary spikes or glitches on the power supply voltage. In case of power-
on (VCC increases from undervoltage to VVCC OFF = 4.2V) the circuit is initialized by an internally generated
power-on-reset (POR). If the voltage VCC decreases under the minimum threshold (VVCC ON = 3.4V), the out-
puts are switched to tristate (high impedance) and the status registers are cleared.
Standby-ModeThe standby mode of the L9949 is activated by setting the bits 12 and 13 of the Input Data Register to zero. All
latched data will be cleared and the inputs and outputs are switched to high impedance. In the standby mode
the current at VS (VCC) is less than typ. 6μA (40μA) for CSN = high (DO in tristate). By switching the VCC voltage
a very low quiescent current can be achieved. If one of the bits 12 and 13 are set to high, the device will be
switched to active mode.
Inductive LoadsEach half bridge is built by internally connected highside and a lowside power DMOS transistor. Due to the built-
in reverse diodes of the output transistors inductive loads can be driven at the outputs OUT1 to OUT5 without
external free-wheeling diodes. The highside driver OUT6 is intended to drive resistive loads only hence only a
limited energie (E<1mJ ) can be dissipated by the internal ESD-diode in freewheeling condition. For inductive
loads (L>100μH) an external free-wheeling diode connected to GND and OUT6 is needed.
Diagnostic FunctionsAll diagnostic functions (over/open load, power supply over-/undervoltage, temperature warning and thermal
shutdown) are internally filtered and the condition has to be valid for at least 10μs (0.5ms, respectively) before
the corresponding status bit in the status registers will be set. The filters are used to improve the noise immunity
of the device. The open load and temperature warning function are intended for information purpose and will
not change the state of the output drivers. In contrast, the overload and thermal shutdown condition will disable
the corresponding driver (overload) or all drivers (thermal shutdown), respectively. The microcontroller has to
clear the status bits to reactivate the corresponding drivers. This is to avoid an uncontrolled switching behaviour
of the device which may result in a heavy noise on the GND and VS lines in case of an fault condition (e.g. short
to GND or VS).
Overvoltage and Undervoltage DetectionIf the power supply voltage VS rises above the overvoltage threshold VSOV OFF (max. 22V), the outputs OUT1
to OUT6 are switched to high impedance state to protect the load. If the supply voltage recovers to normal op-
erating voltage, the device will return to the programmed state (lockout bit 14 = 0). When the voltage VS drops
below the undervoltage threshold VSUV OFF (min. 6V), the output stages are switched to high impedance to
avoid the operation of the power devices without sufficient gate driving voltage (increased power dissipation). If
the supply voltage VS and the internal charge-pump recovers to normal operating voltage the system returns to
the programmed state (lockout bit 14 = 0). If the lockout bit 14 is set, the automatic turn-on of the drivers is de-
activated. The microcontroller needs to clear the status bits to reactivate the drivers.
DESCRIPTION (continued)
L9949
Temperature Warning and Thermal ShutdownWhen the junction temperature rises above Tj TW a temperature warning flag is set and is available via the SPI.
If the junction temperature increases above the second threshold Tj SD, the thermal shutdown bit will be set and
the power DMOS transistors of the output stages are switched off to protect the device. In order to reactivate
the output stages the junction temperature must decrease below Tj SD - Tj SD HYS and the thermal shutdown bit
has to be cleared by the microcontroller.
Open Load DetectionThe open load detection monitors the voltage drop of current sense resistors in each highside and lowside driver
of the output stage. The output signal of an open load comparator has to be valid for at least 0.5 ms (tdOL) to
set the open load bit (bit 1-11) in the status register 1.
Over Load DetectionIn the case of an overcurrent condition an overcurrent flag (bit 1-11) is set in the status register 0 in the same
way as open load detection. If the overcurrent signal is valid for at least tISC = 10μs, the overcurrent flag is set
and the corresponding driver is switched off to reduce the power dissipation and to protect the integrated circuit.
The microcontroller has to clear the status bits to reactivate the corresponding driver.
Current monitorThe current monitor output sources a current image at the current monitor output which has a fixed ratio (1/
10000) of the instantaneous current of the selected highside driver. The bits 12 and 13 of the Input Data register
controls which of the outputs OUT1, OUT2 and OUT6 will be multiplexed to the current monitor output. The cur-
rent monitor output allows a more precise analyse of the actual state of the load rather than the detection of an
open- or overload condition. For example this can be used to detect the motor state (free-running, loaded or
blocked) or the temperature of the heating element.
Figure 1. Pin Connection (Top view)
L9949
PIN FUNCTION
L9949
ABSOLUTE MAXIMUM RATINGSNote: All maximum ratings are absolute ratings. Leaving the limitation of anyone of these values may cause an irreversible damage of the
integrated circuit!
ESD PROTECTION
THERMAL DATA
Temperature warning and thermal shutdown:(1) HBM according to MIL 883C, Methode 3015.7 or EIA/JESD22-A114-A
(2) HBM with all unzapped pins grounded
Operating junction temperature:
L9949
Figure 2. Thermal Data of Package
ELECTRICAL CHARACTERISTCS =8to16V, VCC= 4.5 to 5.5V,Tj= -40to 150 °C, unless otherwise specified. The voltages are refered to
GND and currents are assumed positive, when the current flows into the pin.
Supply
L9949(1) Parameter is measured at -40°C and 25°C. Value for 85°C is guaranteed by design
Over- and undervoltage detection
Current Monitor Output
Outputs: OUT1- OUT6
ELECTRICAL CHARACTERISTCS (continued) =8to16V, VCC= 4.5 to 5.5V,Tj= -40to 150 °C, unless otherwise specified. The voltages are refered to
GND and currents are assumed positive, when the current flows into the pin.
L9949 For details of the on-resistance (Ron over temperature) see the figures „Typical ron characteristics“ for the differential output stages
(FIGURE 3, FIGURE 4, FIGURE5)
ELECTRICAL CHARACTERISTCS (continued) =8to16V, VCC= 4.5 to 5.5V,Tj= -40to 150 °C, unless otherwise specified. The voltages are refered to
GND and currents are assumed positive, when the current flows into the pin.
L9949
Figure 3. TYPICAL RON CHARACTERISTICS OUT1,2
Figure 4. TYPICAL RON CHARACTERISTICS OUT3,4,5
L9949
Figure 5. TYPICAL RON CHARACTERISTICS OUT6
ELECTRICAL CHARACTERISTCS =8to16V, VCC= 4.5 to 5.5V,Tj= -40to 150 °C, unless otherwise specified. The voltages are refered to
GND and currents are assumed positive, when the current flows into the pin.
