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دیتاشیت - Analog Devices - 1A Thermoelectric Cooler (TEC) Driver

شماره قطعه ADN8833
شرح مفصل 1A Thermoelectric Cooler (TEC) Driver
تولید کننده Analog Devices 
آرم Analog Devices 


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ADN8833 شرح
Data Sheet
Ultracompact, 1 A Thermoelectric Cooler
(TEC) Driver for Digital Control Systems
ADN8833
FEATURES
Patented high efficiency single inductor architecture
Integrated low RDSON MOSFETs for TEC driver
TEC voltage and current operation monitoring
No external sense resistor required
Independent TEC heating and cooling current limit settings
Programmable maximum TEC voltage
2 MHz PWM driver switching frequency
External synchronization
Digital thermal control loop compatible
2.50 V reference output with 1% accuracy
Available in a 25-ball, 2.5 mm × 2.5 mm WLCSP or in a
24-lead, 4 mm × 4 mm LFCSP
APPLICATIONS
TEC temperature control
Optical modules
Optical fiber amplifiers
Optical networking systems
Instruments requiring TEC temperature control
VLIM/SD
ILIM
FUNCTIONAL BLOCK DIAGRAM
VTEC
ITEC
VDD
TEC CURRENT
AND VOLTAGE
SENSE AND LIMIT
ADN8833
LINEAR
POWER
STAGE
LDR
CONT
CONTROLLER
PWM
POWER
STAGE
PVIN
SW
VOLTAGE
REFERENCE
OSCILLATOR
AGND VREF
SFB
EN/SY
Figure 1.
PGNDx
GENERAL DESCRIPTION
The ADN8833 is a monolithic H-bridge TEC driver with
integrated 1 A power MOSFETs. It has a linear power stage with
the linear driver (LDR) output and a pulse-width modulation
(PWM) power stage with the SW output. Depending on the
control voltage at the CONT input, the ADN8833 drives current
through a TEC to settle the temperature of a laser diode or a passive
component attached to the TEC module to the programmed
target temperature.
The control voltage applied to the CONT input is generated by a
digital-to-analog converter (DAC) closing the digital proportional,
integral, derivative (PID) loop of temperature control system.
The internal 2.5 V reference voltage provides a 1% accurate
output that is used to bias a voltage divider network to program the
maximum TEC current and voltage limits for both the heating
and cooling modes. It can also be a reference voltage for the DAC
and the temperature sensing circuit, including a thermistor bridge
and an analog-to-digital converter (ADC).
Table 1. TEC Family Models
Model
MOSFET Thermal Loop
ADN8831 Discrete Digital/analog
ADN8833 Integrated Digital
ADN8834 Integrated Digital/analog
Package
LFCSP (CP-32-7)
WLCSP (CB-25-7),
LFCSP (CP-24-15)
WLCSP (CB-25-7),
LFCSP (CP-24-15)
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

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