Freescale Semiconductor 33395, Справочное руководство

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DRM33395 Designer Reference Manual 33395 Evaluation Motor Board
20 Pin Descriptions
Pin Descriptions
9 PWM_CT
PWM_CT is the gate drive signal for the top half-bridge of phase C. A logic high at
input connector J1 turns on the phase C top switch.
10 Shielding_D Pin 10 is connected to a shield wire in the ribbon cable and ground on the board.
11 PWM_CB
PWM_CB is the gate drive signal for the bottom half-bridge of phase C. A logic high
at input connector J1 turns on the phase C bottom switch.
12 GND Digital power supply ground
13 GND Digital power supply ground, redundant connection
14 +5V_D D5-volt power supply
15 +5V_D D5-volt power supply, redundant connection
16 +3.3V_A 3.3-volt power supply
17 GNDA Analog power supply ground
18 GNDA Analog power supply ground, redundant connection
19 +12V +12-volt power supply
20 — No connection
21 V_sense_DCB
V_sense_DCB is an analog sense signal that measures dc bus voltage. It is scaled
at 0.206 volts per volt of dc bus voltage.
22 I_reconst_DCB
I_reconst_DCB is an analog sense signal that measures dc bus current. It is scaled
at 0.172 volts per amp of dc bus current.
23 I_sense_A
I_sense_A is an analog sense signal that measures current in phase A. It is scaled
at 0.172 volts per amp of dc bus current.
24 I_sense_B
I_sense_B is an analog sense signal that measures current in phase B. It is scaled
at 0.172 volts per amp of dc bus current.
25 I_sense_C
I_sense_C is an analog sense signal that measures current in phase C. It is scaled
at 0.172 volts per amp of dc bus current.
26 — No connection
27 — No connection
28 Shielding_A Pin 28 is connected to a shield wire in the ribbon cable and ground on the board.
29 Brake_control Brake_control is the gate drive digital signal for the brake MOSFET.
30 Identification
This is an identification signal that lets the controller know which power stage is
present. It is nominally a 1.5kHz square wave.
Table 3-1 Connector J1 Signal Descriptions (Sheet 2 of 3)
Pin
No.
Signal Name Description