SA57 Datasheet, PDF (4/14 Pages) Cirrus Logic – Switching Amplifier

SA57
Product Innovation From
25 ^{VS SUPPLY CURRENT}
20
125°C
15
25°C
10
5
ONE PHASE SWITCHING
FREQUENCY = 20kHz
50% DUTY CYCLE
0
10 20 30 40 50 60
V_S SUPPLY VOLTAGE (V)
8 ^{VDD SUPPLY CURRENT}
ONE PHASE SWITCHING
7.5
FREQUENCY = 20kHz
7
50% DUTY CYCLE
6.5
6
125°C
5.5
5
25°C
4.5
4
10 20 30 40 50 60
V_S SUPPLY VOLTAGE (V)
ON RESISTANCE - BOTTOM FET
0.8
0.75 (N-Channel)
0.7
0.65
0.6
0.55
0.5
0.45
0.4
V_S=11
V_S=13
V_S=15
0.35
0.3
V_S=17
0.25
0.2
0.15
V_S>22
0 1 2 3 4 5 6 7 8 9 10
I_OUT,(A)
DIODE FORWARD VOLTAGE - BOTTOM FET
5
(N-Channel)
4
3
2
1
0
0.5 0.7 0.9 1.1 1.3 1.5
FORWARD VOLTAGE (V)
V_S SUPPLY CURRENT
180
160
140
120
100
80
60
40
20
ONE PHASE SWITCHING @
0
50% DUTY CYCLE; V_S=50V
0 50 100 150 200 250 300
FREQUENCY (kHz)
5 ^{VDD SUPPLY CURRENT}
4.9
4.8
4.7
4.6
ONE PHASE SWITCHING @
4.5
50% DUTY CYCLE; V_S=50V
0 50 100 150 200 250 300
FREQUENCY (kHz)
ON RESISTANCE - TOP FET
0.8
0.75 (P-Channel)
0.7
0.65
0.6
0.55
0.5
V_S=11
V_S=13
0.45
0.4
V_S=15
0.35
0.3
0.25
V_S>17
0.2
0.15
0 1 2 3 4 5 6 7 8 9 10
I_OUT,(A)
DIODE FORWARD VOLTAGE - TOP FET
5
(P-Channel)
4
3
2
1
00.5 _{0.7 0.9 1.1 1.3 1.5}
FORWARD VOLTAGE (V)
CURRENT SENSE
10
1
0.1
0.01
0.1
1
10
SENSE CURRENT (mA)
POWER DERATING
120
100
SA57A
80
60
SA57
40
20
0
-40 0
40 80 120
CASE TEMPERATURE, T_C

SA57U