参数资料
| 型号： | MAX1969EUI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC DRVR POWER 28-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 热电冷却器 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 带卷 (TR) |
19-2447; Rev 2; 2/07
ATION
ILABLE
EVALU
AVA
KIT
Power Drivers for Peltier TEC Modules
General Description
The MAX1968/MAX1969 are highly integrated and cost-
effective, high-efficiency, switch-mode drivers for Peltier
thermoelectric cooler (TEC) modules. Both devices uti-
lize direct current control to eliminate current surges in
the TEC. On-chip FETs minimize external components
while providing high efficiency. A 500kHz/1MHz switch-
ing frequency and a unique ripple cancellation scheme
reduce component size and noise.
The MAX1968 operates from a single supply and pro-
vides bipolar ± 3A output by biasing the TEC between
the outputs of two synchronous buck regulators. Bipolar
operation allows for temperature control without “dead
zones” or other nonlinearities at low load currents. This
arrangement ensures that the control system does not
hunt when the set point is very close to the natural
operating point, requiring a small amount of heating or
cooling. An analog control signal precisely sets the TEC
current. The MAX1969 provides unipolar output up to
6A. Reliability is optimized with settable limits for both
TEC voltage and current, with independently set limits
for heating and cooling current. An analog output also
monitors TEC current.
The MAX1968/MAX1969 are available in a low-profile
Features
o Direct Current Control Prevents TEC Current
Surges
o On-Chip Power MOSFETs
o High-Efficiency Switch-Mode Design
o Ripple Cancellation for Low Noise
o No Dead-Zone or Hunting at Low-Output Current
o Adjustable TEC Voltage Limit
o Separately Adjustable Heating and Cooling
Current Limits
o ITEC Output Monitors TEC Current
o 1% Accurate Voltage Reference
o 500kHz/1MHz Switching Frequency
o ± 3A Output Current (MAX1968)
o 6A Output Current (MAX1969)
o Thermally Enhanced TSSOP-EP Package
Ordering Information
28-pin TSSOP-EP package and is specified over the
-40 ° C to +85 ° C temperature range. The thermally-
enhanced TSSOP-EP package with exposed metal pad
minimizes operating junction temperature. An evalua-
tion kit is available to speed designs.
PART
MAX1968 EUI
MAX1969 EUI
*EP = Exposed pad.
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 TSSOP-EP*
28 TSSOP-EP*
Applications
Fiber Optic Laser Modules
WDM, DWDM Laser Diode Temperature Control
Fiber Optic Network Equipment
EDFA Optical Amplifiers
Telecom Fiber Interfaces
ATE
Typical Operating Circuit
TEC 3V TO
CURRENT- 5.5V
CONTROL
SIGNAL
Biotech Lab Equipment
CTLI
V DD
PV DD 1
PV DD 2
PGND1
COMP
LX2
MAX1968
PGND2
LX1
GND
OS2
OS1
CS
TEC
Pin Configuration and Functional Diagram appear at end
of data sheet.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
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