MM908E625ACDWB/R2 Motorola, MM908E625ACDWB/R2 Datasheet - Page 29

• Manufacturer Part Number: MM908E625ACDWB/R2
• Description: Integrated Quad Half H-Bridge with Power Supply / Embedded MCU / and LIN Serial Communication
• Manufacturer: Motorola

Half-Bridges
output stages. The half-bridges can be used in H-Bridge, high-
side, or low-side configurations.
(HBOUT) owing to the fact that all half-bridge outputs are
switched off.
Half-Bridge Control
general enable of the circuitry is done by setting PSON in the
System Control Register (SYSCTL). HBx_L and HBx_H form
one half-bridge. It is not possible to switch on both MOSFETs in
one half-bridge at the same time. If both bits are set, the high-
side MOSFET has a higher priority.
bridge being on at the same time, a break-before-make circuit
exists. Switching the high-side MOSFET on is inhibited as long
as the potential between gate and V
threshold. Switching the low-side MOSFET on is blocked as
long as the potential between gate and source of the high-side
MOSFET did not fall below a certain threshold.
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
Outputs HB1:HB4 provide four low-resistive half-bridge
Reset clears all bits in the H-Bridge Output Register
Each output MOSFET can be controlled individually. The
To avoid both MOSFETs (high side and low side) of one half-
Control
Freescale Semiconductor, Inc.
SS
For More Information On This Product,
is not below a certain
Current
On/Off
Status
On/Off
Status
BEMF
Figure 15. Half-Bridge Push-Pull Output Driver
Limit
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Overtemperature Protection,
Overcurrent Protection
Overcurrent Protection
High-Side Driver
Low-Side Driver
Current Limitation,
Current Recopy,
Charge Pump,
Half-Bridge Output Register (HBOUT)
HBx_L—Low-Side On/Off Bits
clears the HBx_L bits.
Reset
Read
Write
HB1:HB4 output features:
• Short circuit (overcurrent) protection on high-side and low-
• Current recopy feature (low side MOSFET).
• Overtemperature protection.
• Overvoltage and undervoltage protection.
• Current limitation feature (low side MOSFET).
These read/write bits turn on the low-side MOSFETs. Reset
• 1 = Low-side MOSFET turned on for half-bridge output x.
• 0 = Low-side MOSFET turned off for half-bridge output x.
side MOSFETs.
HB4
Bit7
0
_
Register Name and Address: HBOUT - $01
H HB4
6
0
_
L HB3
5
0
_
H HB3
4
0
_
VSUP
L HB2
GND
3
0
_
H HB2
2
0
_
L HB1
1
0
_
H HB1
908E625
HBx
Bit0
0
_
29
L