参数资料
| 型号： | MAX1978EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/20页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT MAX1978 |
| 标准包装： | 1 |
| 系列： | * |
MAX1978/MAX1979
Integrated Temperature
Controllers for Peltier Modules
Pin Description (continued)
PIN
23
24
27, 30
28, 31, 33
32, 34
36
37
38
39
40
41
44
45
46
47
48
—
10
NAME
AIN-
AOUT
PV DD 1
LX1
PGND1
FREQ
ITEC
COMP
MAXIP
MAXIN
MAXV
V DD
CTLI
REF
CS
OS1
EP
FUNCTION
Undedicated Chopper-Stabilized Amplifier Inverting Input
Undedicated Chopper-Stabilized Amplifier Output
Power 1 Inputs. Must be same voltage as V DD . Connect all PV DD 1 inputs together at the V DD power plane.
Bypass to PGND1 with a 10μF ceramic capacitor.
Inductor 1 Connection. Connect all LX1 pins together. Connect LX1 to LX2 when using the MAX1979.
Power Ground 1. Internal synchronous-rectifier ground connections. Connect all PGND pins together at
power ground plane.
Switching-Frequency Select. Low = 500kHz, high = 1MHz.
TEC Current Monitor Output. The ITEC output voltage is a function of the voltage across the TEC current-
sense resistor. V ITEC = 1.50V + (V OS1 - V CS ) ? 8.
Current-Control Loop Compensation. For most designs, connect a 10nF capacitor from COMP to GND.
Maximum Positive TEC Current. Connect MAXIP to REF to set default positive current limit +150mV/R SENSE .
Maximum Negative TEC Current. Connect MAXIN to REF to set default negative current limit -150mV /
R SENSE . Connect MAXIN to MAXIP when using the MAX1979.
Maximum Bipolar TEC Voltage. Connect an external resistive divider from REF to GND to set the maximum
voltage across the TEC. The maximum TEC voltage is 4 ? V MAXV .
Analog Supply Voltage Input. Bypass to GND with a 10μF ceramic capacitor.
TEC Current-Control Input. Sets differential current into the TEC. Center point is 1.50V (no TEC current).
Connect to INTOUT when using the thermal control loop. I TEC = (V OS1 - V CS )/R SENSE = (V CTLI - 1.50)/(10 ?
R SENSE ). When (V CLTI - V REF ) > 0, V OS2 > V OS1 > V CS .
1.5V Reference Voltage Output. Bypass REF to GND with a 1μF ceramic capacitor.
Current-Sense Input. The current through the TEC is monitored between CS and OS1. The maximum TEC
current is given by 150mV/R SENSE and is bipolar for the MAX1978. The MAX1979 TEC current is unipolar.
Output Sense 1. OS1 senses one side of the differential TEC voltage. OS1 is a sense point, not a power
output.
Exposed Pad. Solder evenly to the PCB ground plane to maximize thermal performance.
Maxim Integrated
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