SA57 Datasheet, PDF (5/14 Pages) Cirrus Logic – Switching Amplifier

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Figure 3. External Connections
OUT 2
53
NC
54
PGND 2
55
PGND 2
56
PGND 2
57
HS
58
HS
59
NC
60
2b
61
NC
62
2t
63
NC
64
SA57
32
NC
31
V_S 1
30
V_S 1
29
V_S 1
28
NC
27
HS
26
HS
25
TEMP
24
NC
23
DIS2
22
NC
21
I1
Table 1. Pin Descriptions
Pin #
Pin Name
Signal Type
29,30,31
51,52,53
V_S (phase 1)
OUT 2
Power
Power Output
55,56,57
PGND (phase 2) Power
3
SC
Logic Output
61
2b
Logic Input
63
2t
Logic Input
1
I2
Analog Output
7
I_LIM/DIS1
Logic Input/Output
Simplified Pin Description
High Voltage Supply (8.5-60V) supplies phase 1 only
Half Bridge 2 Power Output
High Current GND Return Path for Power Output 2
Indication of a short of an output to supply, GND or another phase
Logic high commands 2 phase lower FET to turn on
Logic high commands 2 phase upper FET to turn on
Phase 2 current sense output
As an output, logic high indicates cycle-by-cycle current limit, and
logic low indicates normal operation. As an input, logic high places
all outputs in a high impedance state and logic low disables the
cycle-by-cycle current limit function.
SA57U