mm908e625 Freescale Semiconductor, Inc, mm908e625 Datasheet - Page 32

• Manufacturer Part Number: mm908e625
• Description: Integrated Quad Half H-bridge With Power Supply, Embedded Mcu, And Lin Serial Communication
• Manufacturer: Freescale Semiconductor, Inc

HALF-BRIDGE OUTPUT REGISTER (HBOUT)
Reset clears the HBx_L bits.
Reset clears the HBx_H bits.
32
Low-Side On/Off Bits (HBx_L)
High-Side On/Off Bits (HBx_H)
908E625
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Reset
Read HB4
Write
Bits
These read/write bits turn on the low-side MOSFETs.
• 1 = Low-side MOSFET turned on for half-bridge output
• 0 = Low-side MOSFET turned off for half-bridge output
These read/write bits turn on the high-side MOSFETs.
x
x
H
7
0
Register Name and Address: HBOUT - $01
_
HB4
6
L
0
_
HB3
H
5
0
_
HB3
4
L
0
_
HB2
H
3
0
_
HB2
2
L
0
_
HB1
H
1
0
_
HB1
0
L
0
_
HALF-BRIDGE CURRENT LIMITATION
current feature. This features is realized by a pulse width
modulation on the low-side MOSFET. The pulse width
modulation on the outputs is controlled by the FGEN input
PWM frequency, whereas the duty cycle is controlled by the
load characteristics.
PWM is 0.1 kHz to 20 kHz.
Functionality
selected current limit was detected. The 908E625 offers five
different current limits. Refer to
values. The low-side MOSFET switches on again if a rising
edge on the FGEN input was detected
• 1 = High-side MOSFET turned on for half-bridge output
• 0 = High-side MOSFET turned on for half-bridge output
Each low-side MOSFET offers a current limit or constant
and the load characteristics. The FGEN input provides the
The recommended frequency range for the FGEN and the
Each low-side MOSFET switches off if a current above the
x
x
Analog Integrated Circuit Device Data
Table 10
Freescale Semiconductor
(Figure
for current limit
18).