SA60_09 Datasheet, PDF (4/6 Pages) Cirrus Logic – H-Bridge Motor Driver/Amplifiers

1.2
1
25°C
0.8
0.6
SA06.40
0.2
10 20 30 40 50 60 70 80
Vs, (V)
Vs QUIESCENT VS SWITCH FREQ
160
140
120
100
80
60
40
20
00
50 100 150 200 250
SWITCHING FREQUENCY, Fsw (KHz)
60
40
20
Product Innova tionFrom
0
1/6
1/3
1/2
2/3
5/6
ANALOG INPUT AS PROPORTION OF Vcc
Vcc I_Q VS SWITCH FREQ
1.6
1.5
1.4
1.3
1.2
1.1
1
0.9
0.8
25
50
75
100 125
SWITCHING FREQUENCY, Fsw (KHz)
1
0.1
0.6 0.8 1 1.2 1.4 1.6 1.8
SOURCE TO DRAIN VOLTAGE
Vcc QUIESCENT VS VOLTAGE
1.4
1.3
1.2
1.1
1
0.9
0.8
0.7
0.6
9 10 11 12 13 14 15 16
Vcc VOLTAGE (V)
EXTERNAL CONNECTIONS
1 2 3 4 5 6 7 8 9 10 11 12
*
*
CF
‡
‡
ANALOG DISABLE
NC
Vcc
GND
PWM
INPUT
ANALOG
INPUT
POWER
GND
ISENSE A _*
A OUT
* ^{ISENSE B}
B OUT
‡ Required RC network. See paragraph
+Vs
on transient shutdown.
* Protection diodes are recommended for
applications where +Vs exceeds 50V.
12-pin Power SIP
PACKAGE
STYLE DP
Formed Leads Available
See package style EE
TYPICAL APPLICATION
A wide variety of loads can be driven in either the voltage
mode or the current mode. The most common applica-
11
9
LOAD
tions use three external blocks: a low pass filter convert-
SA60
ing pulse width data to an analog output, a difference am-
plifier to monitor voltage or current and an error amplifier.
Filter inductors must be suitable for square waves at the
4
8
3
12
2
switching frequency (laminated steel is generally not ac-
ceptable). Filter capacitors must be low ESR and rated
for the expected ripple current. A difference amplifier with
gain of less than one translates the differential output voltage to a single feedback voltage. Dashed line connections
and a higher gain difference amplifier would be used for current control. The error amplifier integrates the difference
between the input and feedback voltages to close the loop.
4
SA60U