Rainbow Electronics ATA6831 - Manual (Page 3)

3
4908D–AUTO–09/06
ATA6831
2. Pin Configuration
Figure 2-1. Pinning QFN18
OUT3S
OUT3F
CS
DI
CLK
PWM
OUT2F
VS2
VS1
VCC
GND
DO
PGND3 PGND1 OUT1S OUT1F PGND2 OUT2S
1
2
3
4
5
6
12
11
10
9
8
7
18 17 16 15 13 14
Table 2-1. Pin Description
Pin Symbol Function
1 OUT3S Sense pin, used only for final testing
2 OUT3F
Half-bridge output 3; formed by internally connecting power MOS high-side switch 3 and low-side switch 3
with internal reverse diodes; short circuit protection; overtemperature protection; diagnosis for short and
open load
3 CS
Chip select input; 5V CMOS logic level input with internal pull-up;
low = serial communication is enabled, high = disabled
4 DI
Serial data input; 5V CMOS logic level input with internal pull-down; receives serial data from the control
device; DI expects a 16-bit control word with LSB transferred first
5 CLK
Serial clock input; 5V CMOS logic level input with internal pull-down;
controls serial data input interface and internal shift register (f
max
= 2 MHz)
6 PWM PWM input; 5V CMOS logic level input with internal pull-down
7 DO
Serial data output; 5V CMOS logic-level tri-state output for output (status) register data; sends 16-bit status
information to the microcontroller (LSB transferred first); output will remain tri-stated unless device is
selected by CS = low; this allows several ICs to operate on only one data-output line
8 GND Ground
9 VCC Logic supply voltage (5V)
10 VS1 Power supply for output stages OUT1 and OUT2; internal supply
11 VS2 Power supply for output stages OUT2 and OUT3; internal supply
12 OUT2F
Half-bridge output 2; formed by internally connected power MOS high-side switch 2 and low-side switch 2
with internal reverse diodes; short circuit protection; overtemperature protection; diagnosis for short and
open load
13 OUT2S Sense pin, used only for final testing
14 PGND2 Power ground OUT2
15 OUT1F
Half-bridge output 1; formed by internally connected power MOS high-side switch 1 and low-side switch 1
with internal reverse diodes; short circuit protection; overtemperature protection; diagnosis for short and
open load
16 OUT1S Sense pin, used only for final testing
17 PGND1 Power ground OUT1
18 PGND3 Power ground OUT3