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LTC1923EGN

Description
High Efficiency Thermoelectric Cooler Controller 28-Pin SSOP N
CategoryPower/power management    The power supply circuit   
File Size437KB,28 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Download user manual Parametric Compare View All

LTC1923EGN Overview

High Efficiency Thermoelectric Cooler Controller 28-Pin SSOP N

LTC1923EGN Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instruction0.150 INCH, PLASTIC, SSOP-28
Reach Compliance Codenot_compliant
ECCN codeEAR99
Is SamacsysN
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage5.5 V
Minimum input voltage2.7 V
Nominal input voltage5 V
JESD-30 codeR-PDSO-G28
JESD-609 codee0
length9.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals28
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.75 mm
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency270 kHz
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.9116 mm
Base Number Matches1
FEATURES
s
s
s
LTC1923
High Efficiency Thermoelectric
Cooler Controller
DESCRIPTIO
The LTC
®
1923 is a pulse width modulator intended for
thermoelectric cooler (TEC) or heater applications requir-
ing either unidirectional or bidirectional drive circuits. All
of the necessary control circuitry and two sets of comple-
mentary output drivers are integrated into the LTC1923 to
drive a full bridge, providing an efficient means of bidirec-
tional current flow to the TEC. An accurate temperature
control loop to stabilize the temperature of a laser diode
system is easily achieved with the addition of just a few
external components. Typical temperature setpoint accu-
racy of 0.1°C is achievable with the LTC1923. Adding an
instrumentation amplifier front end allows setpoint stabil-
ity of 0.01°C.
The part features independent adjustable heating and
cooling pulse-by-pulse current limit, current soft-start for
controlled start-up, output slew rate control to reduce
system noise, differential current sense and voltage am-
plifiers and a host of auxiliary circuits to protect the laser
and provide redundant system monitoring.
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
s
s
s
s
s
s
s
s
High Efficiency, Low Noise Topology
Adjustable Output Slew Rate Reduces EMI
Full-Bridge Controller for Bidirectional
Current Control
Adjustable Pulse-by-Pulse Bidirectional TEC
Current Limit
Open/Shorted Thermistor Indication
Solution Footprint in Less Than 0.6"
×
0.8"
(Double-Sided PCB)
Available in 5mm x 5mm QFN and
28-Pin SSOP Packages
TEC Voltage Clamping
TEC Current, Voltage and Heat/Cool Status Outputs
Adjustable/Synchronizable Oscillator Frequency
Reduces Filter Component Size and System Noise
2.5V Reference Voltage Output
2.7V Minimum Operating Voltage
APPLICATIO S
s
s
s
Laser-Based Fiber Optic Links
Medical Instruments
CPU Temperature Regulators
TYPICAL APPLICATIO
10k
0.1%
Laser Temperature Control Loop Achieving Setpoint Stability of 0.01°C
10k
PLLLPF
82k
REF
10k
NTC
TMP
CMD
LTC1658
V
OUT
R
T
C
T
V
REF
PDRVB
NDRVB
V
DD
LTC1923
1µF
AGND
SS
I
LIM
V
SET
FAULT
V
THRM
C1, C2: TAIYO YUDEN JMK325BJ226MM-T (X7R)
L1, L2: SUMIDA CDRH6D2B-220NC
*MNA, MPA: SILICONIX Si9801
**MNB, MPB: SILICONIX Si9801
H/C
V
TEC
PGND
NDRVA
PDRVA
CS
+
CS
I
TEC
TEC
+
TEC
4
3
1
R
S
2
1µF
MPA*
L1
10µH
C1
MNB** 22µF
COOLER
TEC
L2
10µH
C2
22µF
MNA*
V
REF
330pF
1µF
+
R
SLEW
V
DD
SDSYNC
CNTRL
EAOUT
FB
REF
LTC2053
A = 10
4.7µF
10M
100k
U
U
U
V
DD
10µF
MPB**
1923 TA01
1923f
1

LTC1923EGN Related Products

LTC1923EGN LTC1923EGN#PBF LTC1923EGN#TR LTC1923EGN#TRPBF LTC1923EUH#PBF LTC1923EUH#TRPBF
Description High Efficiency Thermoelectric Cooler Controller 28-Pin SSOP N High Efficiency Thermoelectric Cooler Controller 28-Pin SSOP N High Efficiency Thermoelectric Cooler Controller 28-Pin SSOP N T/R High Efficiency Thermoelectric Cooler Controller 28-Pin SSOP N T/R High Efficiency Thermoelectric Cooler Controller 32-Pin QFN EP High Efficiency Thermoelectric Cooler Controller 32-Pin QFN EP T/R
Is it Rohs certified? incompatible conform to incompatible conform to conform to conform to
Maker ADI ADI ADI ADI ADI ADI
package instruction 0.150 INCH, PLASTIC, SSOP-28 SSOP, 0.150 INCH, PLASTIC, SSOP-28 SSOP, VQCCN, VQCCN,
Reach Compliance Code not_compliant compliant not_compliant compliant compliant compliant
Is Samacsys N N N N N N
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V
Minimum input voltage 2.7 V 2.7 V 2.7 V 2.7 V 2.7 V 2.7 V
Nominal input voltage 5 V 5 V 5 V 5 V 5 V 5 V
JESD-30 code R-PDSO-G28 R-PDSO-G28 R-PDSO-G28 R-PDSO-G28 S-PQCC-N32 S-PQCC-N32
JESD-609 code e0 e3 e0 e3 e3 e3
length 9.9 mm 9.9 mm 9.9 mm 9.9 mm 5 mm 5 mm
Humidity sensitivity level 1 1 1 1 1 1
Number of functions 1 1 1 1 1 1
Number of terminals 28 28 28 28 32 32
Maximum operating temperature 70 °C 70 °C 70 °C 70 °C 70 °C 70 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SSOP SSOP SSOP SSOP VQCCN VQCCN
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR SQUARE SQUARE
Package form SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH CHIP CARRIER, VERY THIN PROFILE CHIP CARRIER, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) 235 260 235 250 260 250
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 1.75 mm 1.75 mm 1.75 mm 1.75 mm 0.8 mm 0.8 mm
surface mount YES YES YES YES YES YES
Switch configuration PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL
Maximum switching frequency 270 kHz 270 kHz 270 kHz 270 kHz 270 kHz 270 kHz
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) MATTE TIN (SN) Tin/Lead (Sn/Pb) Matte Tin (Sn) MATTE TIN Matte Tin (Sn)
Terminal form GULL WING GULL WING GULL WING GULL WING NO LEAD NO LEAD
Terminal pitch 0.635 mm 0.635 mm 0.635 mm 0.635 mm 0.5 mm 0.5 mm
Terminal location DUAL DUAL DUAL DUAL QUAD QUAD
Maximum time at peak reflow temperature 20 30 20 NOT SPECIFIED 30 NOT SPECIFIED
width 3.9116 mm 3.9116 mm 3.9116 mm 3.9116 mm 5 mm 5 mm
Base Number Matches 1 1 1 1 1 1
Brand Name - Analog Devices Inc - Analog Devices Inc Analog Devices Inc Analog Devices Inc
Is it lead-free? - Contains lead - Contains lead Contains lead Contains lead
Contacts - 28 - 28 32 32
Manufacturer packaging code - 05-08-1641 (GN28) - 05-08-1641 (GN28) 05-08-1693 05-08-1693
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