VS: Supply voltage for the output transistors. These pins require decoupling (1μF capacitor with good high frequency
characteristics is recommended) to the PGND pins. The decoupling capacitor should be located as close to the VS
and PGND pins as possible. Additional capacitance will be required at the VS pins to handle load current peaks and
potential motor regeneration. Refer to the applications section of this datasheet for additional discussion regarding
bypass capacitor selection. Note that Vs pins 29-31 carry only the phase 1 supply current. Pins 46-49 carry supply
current for phase2. Phase 1 may be operated at a different supply voltage from phase 2. Only the B & C supply pins
(46-49) are monitored for undervoltage conditions.
OUT 1 , OUT 2: These pins are the power output connections to the load. NOTE: When driving an inductive load, it
is recommended that two Schottky diodes with good switching characteristics (fast tRR specs) be connected to each
pin so that they are in parallel with the parasitic back-body diodes of the output FETs. (See Section 2.6)
PGND: Power Ground. This is the ground return connection for the output FETs. Return current from the load flows
through these pins. PGND is internally connected to SGND through a resistance of a few ohms. See section 2.1 of
this datasheet for more details.
SC: Short Circuit output. If a condition is detected on any output which is not in accordance with the input commands,
this indicates a short circuit condition and the SC pin goes high. The SC signal is blanked for approximately
200ns during switching transitions but in high current applications, short glitches may appear on the SC pin. A high
state on the SC output will not automatically disable the device. The SC pin includes an internal 12kΩ series resistor.
1b, 2b: These Schmitt triggered logic level inputs are responsible for turning the associated bottom, or lower Nchannel
output FETs on and off. Logic high turns the bottom N-channel FET on, and a logic low turns the low side
N-channel FET off. If 1b or 2b is high at the same time that a corresponding 1t or 2t input is high, protection circuitry
will turn off both FETs in order to prevent shoot-through current on that output phase. Protection circuitry also includes a dead-time generator, which inserts dead time in the outputs in the case of simultaneous switching of the
top and bottom input signals.
1t, 2t: These Schmitt triggered logic level inputs are responsible for turning the associated top side, or upper Pchannel
FET outputs on and off. Logic high turns the top P-channel FET on, and a logic low turns the top P-channel FET off.
追加100共200分,给翻译准确的人,否则送给同学了.
接上