參數(shù)資料
型號: MAX1978-MAX1979
廠商: Maxim Integrated Products, Inc.
英文描述: Integrated Temperature Controllers for Peltier Modules
中文描述: 集成溫度控制器佩爾蒂埃模塊
文件頁數(shù): 10/20頁
文件大?。?/td> 620K
代理商: MAX1978-MAX1979
M
Integrated Temperature
Controllers for Peltier Modules
10
______________________________________________________________________________________
Pin Description (continued)
PIN
23
24
NAME
AIN-
AOUT
FUNCTION
Undedicated Chopper-Stabilized Amplifier Inverting Input
Undedicated Chopper-Stabilized Amplifier Output
27, 30
PV
DD
1
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.
28, 31, 33
LX1
Inductor 1 Connection. Connect all LX1 pins together. Connect LX1 to LX2 when using the MAX1979.
32, 34
PGND1
Power Ground 1. Internal synchronous-rectifier ground connections. Connect all PGND pins together at
power ground plane.
36
FREQ
Switching-Frequency Select. Low = 500kHz, high = 1MHz.
37
ITEC
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 GND when using the MAX1979.
38
39
COMP
MAXIP
40
MAXIN
41
MAXV
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.
44
V
DD
45
CTLI
46
REF
47
CS
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.
48
OS1
Output Sense 1. OS1 senses one side of the differential TEC voltage. OS1 is a sense point, not a power
output.
相關(guān)PDF資料
PDF描述
MAX1978ETM Integrated Temperature Controllers for Peltier Modules
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