L9947S STMicroelectronics, L9947S Datasheet - Page 8

• Manufacturer Part Number: L9947S
• Description: IC DRIVER AUTO APPS MULTIWATT15
• Manufacturer: STMicroelectronics
• Type: Half Bridger

Specifications of L9947S

• Input Type: Non-Inverting
• Number Of Outputs: 5
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Through Hole
• Package / Case: Multiwatt-15 (Vertical, Bent and Staggered Leads)
• Operating Supply Voltage: 26 V
• Supply Current: 5 mA
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Current - Output / Channel: -
• On-state Resistance: -
• Current - Peak Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

L9947
DATA TRANSFER AND OUTPUTS ACTIVAT-
ING (Figure 3)
The half bridges of OUT1, OUT2 and OUT3 can
be used with OUT4 to drive three bidirectional
motors in full bridge configuration as shown in
fig.1 Only one motor can be driven in the same
time. The
status 1 till 10 at the bus and latch it with a low
pulse in the L9947. So the motor is activated. To
stop the motor it is useful to insert a braking
phase (status 9). In the braking condition there
are all low side DMOS of the half bridges
switched-on in this case the flyback currents flows
through the low side switches instead of the intrin-
sic diodes of the half bridges. After that, the half
bridges could be switched in tristate (T). The high
side driver, OUT5 can be switched only when all
Figure 3: Signal sequence for data transfer to switch M1 right, read the output status, brake the motor
8/13
and activate the standby mode.
C writes the corresponding word
the half bridges are in tristate status 10.
The C works always as master and the L9947
Power Interface as slave. That means: the
starts the communication between the Power In-
terface and itself with low transition at the CSN
line. CSN = 0, R/WN= 0 the L9947 reads the data
at the bus and execute the command as shown in
tables 1,3,4 (write mode). The high slope of the
CSN stores the last command and execute it fur-
ther. All inputs are disabled if CSN= 1.
So the bus can be used for another device. With
CSN = 0 and R/WN = 1 the L9947 writes the
status of the diagnostic at the parallel bus until
CSN becomes high (table 2; status
mode). The power outputs maintain the same
status as before.
+ 15) (read
C