MAX1978 Maxim, MAX1978 Datasheet - Page 8

• Manufacturer Part Number: MAX1978
• Description: Integrated Temperature Controllers for Peltier Modules
• Manufacturer: Maxim

Integrated Temperature
Controllers for Peltier Modules
8
(V
1V/div
1A/div
V
-0.2
-0.4
-0.6
-0.8
-1.0
DD
0.6
0.4
0.2
CTLI
I
-10
-15
-20
-25
-30
-35
TEC
10
-5
0
_______________________________________________________________________________________
5
0
-0.4
3.0
= 5V, V
SINK
SWITCHING FREQUENCY CHANGE
REFERENCE LOAD REGULATION
-0.2
REFERENCE LOAD CURRENT (mA)
3.5
CTLI
CTLI STEP RESPONSE
SOURCE
vs. INPUT SUPPLY
0
= 1V, V
4.0
0.2
1ms/div
V
DD
(V)
0.4
FREQ
4.5
0.6
= GND, RTEC = 1Ω, circuit of Figure 1, T
5.0
0.8
1.0
5.5
1.5V
0A
20mA/div
2V/div
V
I
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
TEC
DD
Typical Operating Characteristics (continued)
1.0
0.5
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
-10
3.0
NTC, 10kΩ THERMISTOR
CIRCUIT IN FIGURES 1 AND 2
vs. THERMISTOR TEMPERATURE
INPUT SUPPLY STEP RESPONSE
REFERENCE VOLTAGE CHANGE
0
THERMISTOR TEMPERATURE (°C)
3.5
10
vs. INPUT SUPPLY
ATO VOLTAGE
4.0
20
10ms/div
V
DD
(V)
30
4.5
A
= +25°C, unless otherwise noted.)
40
5.0
50
5.5
60
0V
1A
TEMPERATURE
0.001°C/div
500mA/div
200mA/div
V
5V/div
SHDN
I
TEC
I
-1
-2
-3
-4
DD
3
2
1
0
-40
STARTUP AND SHUTDOWN WAVEFORMS
REFERENCE VOLTAGE CHANGE
I
T
TEC
A
-20
= +45°C
= +25°C
THERMAL STABILITY,
vs. TEMPERATURE
TEMPERATURE (°C)
COOLING MODE
0
100µs/div
20
4s/div
40
60
80