PIN CONNECTIONS
PIN CONNECTIONS
DR1SENSE2
DR1SENSE1
20
DR2PWM
DR1PWM
DR1A2
DR1B2
DR1B1
DR1A1
19
GND
28
27
26
25
24
23
22
21
18
GND
VB+
GND
VB+
VB+
DR2B2
DR2SENSE2
DR2A2
VB+
V2_SWITCH
DR2_MODE
V2_FB
GND
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
1
2
3
4
5
6
17
16
15
14
13
12
11
10
9
8
7
GND
VB+
VB+
DR2B1
DR2SENSE1
DR2A1
VB+
V1_SWITCH
DR1_MODE
V1_FB
GND
SCLK
VB
RESET
GND
V
CC
CS
Figure 3. 34920 Pin Connections
Table 1. 34920 Pin Definitions
Pin Number
1
2
3
4
5
6, 7, 17, 18,
28, 29, 39, 40
8
9
10
11, 15, 16,
23, 30, 31, 35
12
13
14
19
20
Pin Name
VB
CP2
CP1
RESET
VCC
GND
V1_FB
DR1_MODE
Formal Name
Output pin to V
V
b
Capacitor to CP1
Capacitor to CP2
Reset Output
V
CC
Supply Voltage
Substrate Ground
V1 Regulator Feedback Input
Mode Select for Driver 1
Pin to connect to V
V
b
capacitor.
AGND
GND
Definition
SDI
CP2
Pin for boost generator switch capacitor.
Pin for boost generator switch capacitor.
Active low Reset output.
V
CC
power input for internal use. The 34920 accepts either 3.3 V ±10% or
5.0 V ±5% for its logic voltage.
Ground connections for digital IC circuitry.
Voltage feedback for the V1 regulator.
Selects operational mode of Driver 1; Step = 1 / DC = 0.
Switching output for V1 regulator.
High-voltage supply for motors and regulators.
Motor driver output.
Current sense for current mode.
Motor driver output.
Motor driver output.
Current sense for current mode.
V1_SWITCH Internal MOSFET Source for V1
Regulator
VB+
DR2A1
DR2SENSE1
DR2B1
DR1A1
DR1SENSE1
VB+ (Bulk) Supply Voltage
Driver 2, Bridge 1, Output A
Driver 2, Bridge 1, I Sense
Driver 2, Bridge 1, Output B
Driver 1, Bridge 1, Output A
Driver 1, Bridge 1, I Sense
CP1
34920
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
