收藏本站
AVAILAB
LE
MAX1978/MAX1979
Integrated Temperature
Controllers for Peltier Modules
General Description
The MAX1978/MAX1979 are the smallest, safest, most
accurate complete single-chip temperature controllers for
Peltier thermoelectric cooler (TEC) modules. On-chip power
FETs and thermal control-loop circuitry minimize external
components while maintaining high efficiency. Selectable
500kHz/1MHz switching frequency and a unique ripple-can-
cellation scheme optimize component size and efficiency
while reducing noise. Switching speeds of internal
MOSFETs are optimized to reduce noise and EMI. An ultra-
low-drift chopper amplifier maintains ±0.001°C temperature
stability. Output current, rather than voltage, is directly con-
trolled to eliminate current surges. Individual heating and
cooling current and voltage limits provide the highest level of
TEC protection.
The MAX1978 operates from a single supply and provides
bipolar ±3A output by biasing the TEC between the outputs
of two synchronous buck regulators. True bipolar operation
controls temperature without “dead zones” or other nonlin-
earities at low load currents. The control system does not
hunt when the set point is very close to the natural operating
point, where only a small amount of heating or cooling is
needed. An analog control signal precisely sets the TEC
current. The MAX1979 provides unipolar output up to 6A.
A chopper-stabilized instrumentation amplifier and a high-
precision integrator amplifier are supplied to create a pro-
portional-integral (PI) or proportional-integral-derivative (PID)
controller. The instrumentation amplifier can interface to an
external NTC or PTC thermistor, thermocouple, or semicon-
ductor temperature sensor. Analog outputs are provided to
and current. In addition, separate
monitor TEC temperature Functional Diagrams
overtemperature and undertemperature outputs indicate
when the TEC temperature is out of range. An on-chip volt-
age reference provides bias for a thermistor bridge.
The MAX1978/MAX1979 are available in a low-profile
48-lead thin QFN-EP package and is specified over the
Features
o Smallest, Safest, Most Accurate Complete
Single-Chip Controller
o On-Chip Power MOSFETS—No External FETs
o Circuit Footprint < 0.93in 2
o Circuit Height < 3mm
o Temperature Stability to 0.001°C
o Integrated Precision Integrator and Chopper
Stabilized Op Amps
o Accurate, Independent Heating and Cooling
Current Limits
o Eliminates Surges By Directly Controlling
TEC Current
o Adjustable Differential TEC Voltage Limit
o Low-Ripple and Low-Noise Design
o TEC Current Monitor
o Temperature Monitor
o Over- and Undertemperature Alarm
o Bipolar ±3A Output Current (MAX1978)
o Unipolar +6A Output Current (MAX1979)
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX1978 ETM+ -40 ° C to +85 ° C 48 Thin QFN-EP*
MAX1979 ETM+ -40 ° C to +85 ° C 48 Thin QFN-EP*
*EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration
TOP VIEW
-40°C to +85°C temperature range. The thermally
enhanced QFN-EP package with exposed metal pad
minimizes operating junction temperature. An evaluation
kit is available to speed designs.
Applications
Fiber Optic Laser Modules
WDM, DWDM Laser-Diode Temperature Control
Fiber Optic Network Equipment
OS2
N.C.
PGND2
LX2
PGND2
LX2
PV DD 2
N.C.
LX2
PV DD 2
SHDN
OT
1
2
3
4
5
6
7
8
9
10
11
12
+
MAX1978
MAX1979
36
35
34
33
32
31
30
29
28
27
26
25
FREQ
N.C
PGND1
LX1
PGND1
LX1
PV DD 1
N.C.
LX1
PV DD 1
GND
GND
EDFA Optical Amplifiers
Telecom Fiber Interfaces
ATE
UCSP is trademark of Maxim appears of data Inc.
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
Typical Operating Circuit Integrated end Products, sheet.
TQFN-EP
*ELECTRICALLY CONNECTED TO THE UNDERSIDE METAL SLUG.
NOTE: GND IS CONNECTED TO THE UNDERSIDE METAL SLUG.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim integrated .com.
19-2490; Rev 3; 3/10
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
MAX3100EVKIT+ KIT EVAL FOR MAX3100
MAX3160EEVKIT+ EVAL KIT FOR MAX3160E
MAX3161EEVKIT+ EVAL KIT FOR MAX3161E
MAX31855EVKIT# KIT EVAL FOR MAX31855
MAX3223EEVKIT+ EVALUATION KIT MAX3223
MAX3397EEVKIT+ KIT EVALUATION FOR MAX3397E
MAX3420EEVKIT-2+ EVAL KIT FOR MAX3420E
MAX34446EVKIT# KIT EVAL FOR MAX34446
相关代理商/技术参数
MAX19790ETX/GH9 功能描述:有源衰减器 RoHS:否 制造商:TriQuint Semiconductor 通道数量: 最大频率: 阻抗: 最大 VSWR: 位数: 最大工作温度: 最小工作温度:
MAX19790ETX+ 功能描述:有源衰减器 250MHz - 4000MHz Attenuator RoHS:否 制造商:TriQuint Semiconductor 通道数量: 最大频率: 阻抗: 最大 VSWR: 位数: 最大工作温度: 最小工作温度:
MAX19790ETX+T 功能描述:有源衰减器 250MHz - 4000MHz Attenuator RoHS:否 制造商:TriQuint Semiconductor 通道数量: 最大频率: 阻抗: 最大 VSWR: 位数: 最大工作温度: 最小工作温度:
MAX19790ETX+TW 功能描述:有源衰减器 250MHz to 4000MHz Dual Analog Voltage Variable Attenuator RoHS:否 制造商:TriQuint Semiconductor 通道数量: 最大频率: 阻抗: 最大 VSWR: 位数: 最大工作温度: 最小工作温度:
MAX19790ETX+W 功能描述:有源衰减器 Dual SiGe High-Linearity 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch RoHS:否 制造商:TriQuint Semiconductor 通道数量: 最大频率: 阻抗: 最大 VSWR: 位数: 最大工作温度: 最小工作温度:
MAX19790EVKIT+ 功能描述:有源衰减器 MAX19790 EVKIT RoHS:否 制造商:TriQuint Semiconductor 通道数量: 最大频率: 阻抗: 最大 VSWR: 位数: 最大工作温度: 最小工作温度:
MAX19791ETX+ 制造商:Maxim Integrated Products 功能描述:50MHZ TO 4000MHZ DUAL ANALOG VOLTAGE VARIABLE ATTENUATOR WIT - Rail/Tube
MAX19791ETX+T 制造商:Maxim Integrated Products 功能描述:50MHZ TO 4000MHZ DUAL ANALOG VOLTAGE VARIABLE ATTENUATOR WIT - Tape and Reel