Datasheet

OPA569
SBOS264A
20
www.ti.com
FIGURE 21. Single Power Amplifier Driving Bidirectional Current through a TEC using Asymmetrical Bipolar Power Supplies.
FIGURE 19. Grounded Anode LED Driver.
APPLICATION CIRCUITS
FIGURE 20. Bridge Tied Load Driver.
Luxeon Star-0
High-Power LED
12,
13
5
3
R
SET
6
17,
18
(1)
14,
15 V
O
f
O
= 10kHz
V
IN
OPA569
R
1
49.9kΩ
R
SHUNT
1Ω
I
O
R
2
4.99kΩ
4.99kΩ
0.0033µF
R
3
49.9kΩ
–5V
+1V
0V
0mA
–100mA
0V
–2.5V
Feedback for Constant Current,
1V Input per 100mA Output as Shown.
NOTE: (1) Bypass as recommended.
R
SET
R
M
I
M
= +
I
TEC
475
V
SET
Optional to
monitor the
load current.
TEC
OPA569
1kΩ
Heat/Cool
V
TEC
V
TEC
= 2 (V
IN
– V
SET
)
+ –
5
12,
13
17,
18
14,
15
Current
Limit
Set
Current
Limit
Set
17,
18
5
6
3
3
12,
13
14,
15
19
I
MONITOR
R
SET
NOTE: (1) Bypass as recommended.
5V
(1)
5V
6
1kΩ
V
IN
OPA569
V
M
(1)
OPA569
5
12,
13
17,
18
19
–1.2V
14,
15
NOTE: Total Supply Must
be < 5.5V Cooling/Heating.
NOTE: (1) Bypass as recommended.
R
MONITOR
I
MONITOR
+3.3V
(1)
6
V
IN
TEC
I
L