MC34931 Datasheet, PDF (3/25 Pages) Freescale Semiconductor, Inc – 34931 Industrial

PIN CONNECTIONS
PIN CONNECTIONS
AGND
1
D1
2
FB
3
N/C
4
EN/D2
5
N/C
6
VPWR
7
VPWR
8
N/C
9
OUT1
10
OUT1
11
N/C
12
N/C
13
N/C
14
PGND
15
PGND
16
32
SF
31
IN1
30
N/C
29
IN2
28
CCP
27
N/C
26
VPWR
25
VPWR
24
N/C
23
OUT2
22
OUT2
21
N/C
20
N/C
19
N/C
18
PGND
17
PGND
32 SOICW-EP
Transparent Top View
Figure 3. 34931 Pin Connections
A functional description of each pin can be found in the Functional Description section beginning on page 11.
Table 1. 34931 Pin Definitions
Pin
Number
Pin
Name
Pin
Function
Formal Name
Definition
2
D1 Logic Input Disable Input 1 When D1 is logic HIGH, both OUT1 and OUT2 are tri-stated. Schmitt trigger
(Active High)
input with ~80 μA source so default condition = disabled.
3
FB
Analog
Feedback
The load current feedback output provides ground referenced 0.24% of the
Output
high side output current. (Tie to GND through a resistor if not used.)
5
EN/D2 Logic Input
Enable Input
When EN/D2 is logic HIGH the H-bridge is operational. When EN/D2 is logic
LOW, the H-bridge outputs are tri-stated and placed in Sleep mode. (logic
input with ~ 80 μA sink so default condition = Sleep mode.)
7, 8, 25, 26
VPWR Power Input Positive Power
Supply
These pins must be connected together physically as close as possible and
directly soldered down to a wide, thick, low resistance supply plane on the
PCB.
10, 11
15-18
OUT1
PGND
Power
Output
Power
Ground
H-bridge Output 1 ^{Source of HS1 and drain of LS1.}
Power Ground
High-current power ground pins must be connected together physically as
close as possible and directly soldered down to a wide, thick, low resistance
ground plane on the PCB.
22, 23
28
OUT2
CCP
Power
Output
Analog
Output
H-bridge Output 2 Source of HS2 and drain of LS2.
Charge Pump
Capacitor
External reservoir capacitor connection for the internal charge pump;
connected to VPWR. Allowable values are 30 nF to 100 nF. Note: This
capacitor is required for the proper performance of the device.
Analog Integrated Circuit Device Data
Freescale Semiconductor
34931
3