MM908E622ACDWBR2 FREESCALE [Freescale Semiconductor, Inc], MM908E622ACDWBR2 Datasheet - Page 38

• Manufacturer Part Number: MM908E622ACDWBR2
• Description: Integrated Quad Half-bridge, Triple High Side and EC Glass Driver with Embedded MCU and LIN for High End Mirror
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Half-bridge Control
general enable of the circuitry is done by setting PSON in the
System Control Register (SYSCTL). The HBx_L and HBx_H
bits 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 is in PWM mode.
half-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
not below a certain 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.
HALF-BRIDGE OUTPUT REGISTER (HBOUT)
38
908E622
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Reset
Read
Write
Each output MOSFET can be controlled individually. The
To avoid both MOSFETs (high side and low side) of one
HB4_
Bit7
H
0
Register Name and Address: HBOUT - $01
HB4_
6
L
0
Control
HB3_
H
5
0
HB3_
L
4
0
HB2_
H
3
0
On/Off
On/Off
Status
Status
PWM
PWM
Figure 22. Half-bridge Push-Pull Output Driver
HB2_
2
L
0
HB1_
Over-temperature Protection
H
1
0
Over-current Protection
Over-current Protection
High Side Driver
Low Side Driver
Current Limitation
SS
Current Recopy
HB1_
Charge Pump
Active Clamp
Bit0
is
L
0
HBx_H, HBx_L — Half-bridge Output Switches
output according to the following table. Reset clears all
HBx_H, HBx_L bits.
Table 9. Half-Bridge Configuration
Half-bridge PWM mode
HBxH of one Half-bridge to “1”. In this mode, the high side
MOSFET is controlled by the incoming PWM signal on the
PWM pin (see
switched on.
HBx_H
These read/write bits select the output of each half-bridge
The PWM mode is selected by setting both HBxL and
If the incoming signal is high, the high side MOSFET is
0
0
1
1
HBx_L
0
1
0
1
Figure
Low side and high side MOSFET off
High side MOSFET off,
low side MOSFET on
High side MOSFET on,
low side MOSFET off
High side MOSFET in PWM mode
2, page 2).
Analog Integrated Circuit Device Data
VSUP
GND
Freescale Semiconductor
Mode
HBx