ThermalMax I N T E G R A T E D P R O D U C T S LX1810 ThermoElectric Cooler Drive Controller IC P RODUCTION D ATA S HEET KEY FEATURES DESCRIPTION to the system. The LX1810 operates on a single voltage supply, greatly simplifying supply requirements, with an operating frequency that is high enough to eliminate detrimental thermal stresses to the TEC. The output ripple factor of the system can be maintained well below 10% thus not effecting the performance of delta T control. Utilizing a full-bridge topology, the LX1810 can be used for both heating and cooling operations. The LX1810, when used in conjunction with a temperature sense device, accurately regulates TEC current levels allowing tight control of temperature. Fully integrated FET drivers in a 28Pin SSOP allows the design of a fully functional TEC controller while minimizing board space. Integrated Switching Full-Bridge PWM Drive Architecture Single DC Supply Operation Very Low Output Noise Maximum Efficiency 90% High Output Integrated Drivers PSRR –70dB Typical Differential Input To Minimize Noise External Oscillator Synchronization 28-Pin SSOP Package WWW . Microsemi .C OM The LX1810 is a Full-Bridge thermo-electric cooler (TEC) controller specifically designed for high performance opto-electronic products where precise temperature control is required. These products tune or stabilize sensitive optical components in applications that include frequency tunable fiber optic lasers, EDFA amplifiers, waveguides, and other dense wavelength division multiplexing (DWDM) components. Other applications include microwave transistors in new wireless basestations. The LX1810 uses highly efficient (>90%) pulse width modulation (PWM) technology, allowing the controller to be conveniently mounted near the TEC without adding heat APPLICATIONS/BENEFITS Peltier Effect (Thermoelectric Coolers) Controllers High Efficiency H-Bridge Drive Circuits RF Power Amplifier Electronic Cooling CPU Electronic Cooling IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PRODUCT HIGHLIGHT V IN = 15V LX1810 TEC RT LX1810 PACKAGE ORDER INFO TA (°C) Plastic SSOP 28-Pin LX1810-CDB DB 0 to 70 Note: Available in Tape & Reel. Append the letter “T” to the part number. (i.e. LX1810-CDBT) Copyright 2002 Rev. 1.0a, 10/21/2002 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 ThermalMax I N T E G R A T E D P R O D U C T S LX1810 ThermoElectric Cooler Drive Controller IC P RODUCTION D ATA S HEET ABSOLUTE MAXIMUM RATINGS PACKAGE PIN OUT VREF GND NC V25 RPW M CPW M INPUT+ INPUTINAM POUT SHDN STBY STATUS EAIN EAOUT 28 14 15 WWW . Microsemi .C OM Supply Voltage (PVDD, VDD)....................................................................... -0.3V to 15V SLEEP, STATUS, FBK+, FBK- ........................................................... -0.3V to VDD +0.3V IS- ..............................................................................................PVDD –2 to PVDD to +0.3V RPWM, CPWM, MUTE ...................................................................... -0.3V to VREF+0.3V INPUT +, INPUT -, INAMPOUT........................................................ -0.3V to VREF+0.3V EAIN, EAOUT, FAOUT ..................................................................... -0.3V to VREF+0.3V CLOCK .................................................................................................. -0.3V to CN +0.3V Operating Junction Temperature Plastic (DB Package) ............................................. 125OC Storage Temperature Range ....................................................................... -65 OC to 150 OC Lead Temperature (Soldering, 10 seconds)............................................................... 300 OC CLOCK ISCP VDD PVDD P+ N+ NPPGND CN FBKFBK+ FAOUT Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal. THERMAL DATA DB Plastic SSOP 28-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 50°C/W Junction Temperature Calculation: TJ = TA + (PD x θJA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. FUNCTIONAL PIN DESCRIPTION Pin Name Description Pin Name VREF 5V Reference GND Low Current Ground FBK+ Feedback Amplifier Non-Inverting Input No Internal Connection FBK- Feedback Amplifier Inverting Input NC V25 FAOUT Description 2.5V Reference RPWM PWM Oscillator Timing Resistor Feedback Amplifier Output CN Supply Decoupling for NFET Drivers PGND Output Driver High Current Ground CPWM PWM Oscillator Timing Capacitor P- Drive for PFET on Negative Half of Bridge INPUT+ Positive Differential Amplifier Input N- Drive for NFET on Negative Half of Bridge INPUT - Negative Differential Amplifier Input N+ Drive for NFET on Positive Half of Bridge P+ Drive for PFET on Positive Half of Bridge INAMPOUT Input Differential Amplifier Output PVDD STBY IC Standby Control Input (active high) VDD STATUS EAIN EAOUT Copyright 2002 Rev. 1.0a, 10/21/2002 Output Driver Supply Voltage Analog Supply Voltage UVLO Indicator (Open Collector Output) CP Supply Decoupling for PFET Drivers Inverting Input of Error Amplifier IS - Current Limit Sense Input Error Amplifier Output CLOCK PACKAGE DATA SHDN IC Shutdown Control Input (active low) Input / Output Clock for Synch Operation Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 ThermalMax I N T E G R A T E D LX1810 ThermoElectric Cooler Drive Controller IC P R O D U C T S P RODUCTION D ATA S HEET Parameter Symbol Test Conditions Min LX1810 Typ Max Units ` Supply Voltage Supply Voltage Power Supply Rejection Ratio ` Oscillator Section Oscillator Frequency Charge Current Discharge Current Oscillator Peak Voltage Oscillator Valley Voltage Voltage Stability VDD PSRR FOSC ICHG IDIS VPK VVAL Temperature Stability VIN = 15V, VRIPPLE = 1VRMS, 10Hz to 10kHz 7 -70 15 V dB (varies with VDD pin voltage) (varies with VDD pin voltage) (varies with VDD pin voltage) (varies with VDD pin voltage) VDD = 8V to 15V O O TA = 0 C to 70 C O O TA = -40 C to 125 C 335 -110 110 3.4 1.6 0.6 1.0 1.5 kHz µA µA V V % % % 2 2 WWW . Microsemi .C OM ELECTRICAL CHARACTERISTICS Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C < TA < 70°C. Test conditions: RPWM = 49.9k, CPWM = 100pF, VDD = PVDD = 15V ` Error Amplifier ` ` ` ` Line Regulation Load Regulation ` Under voltage Lockout Section Start Threshold Voltage UV Lockout Hysteresis UVLO Delay To Output Enable Copyright 2002 Rev. 1.0a, 10/21/2002 VIO AOL UGBW VOH VOL 5 60 7 50 ‘mV dB ‘mHz V ‘mV 1 µA 3.535 V/V V ‘mV ‘kΩ VREF –1 IOUT = -100µA IOUT = +100µA IIN VIN = 1V to VREF VOH VOL Set by Internal Resistors IOUT = -100µA IOUT = +100µA 3.465 3.85 3.5 1.3 42 Set by Internal Resistors 89 91 388 93 ‘mV/V kΩ 190 210 500 250 230 mV ‘ns ‘ns (Required Number of Clock Cycles) 9 9 9 (Required Number of Clock Cycles) 2 2 2 Excluding blanking pulse O 5.000 ± 25 2 4 0.5 5 O TA = 0 C to 70 C O O TA = -40 C to 125 C VDD = 9V to 15V IOUT = 0 to 20mA 0.5 (Required Number of Clock Cycles) Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 6.5 6.5 62,500 ± 50 5 10 ‘mV ‘mV ‘mV ‘mV ‘mV V V Page 3 ELECTRICALS Input Offset Voltage DC Open Loop Gain Unity Gain Bandwidth High Output Voltage Low Output Voltage Input Common Mode Range Input Bias Current Input Amplifier Stage Gain Output Voltage, High Output Voltage, Low Input Impedance Feedback Amplifier Stage Gain Input Impedance Current Limit Comparator Voltage Sense Threshold Blanking Pulse Delay Response Time IUM Pulses required to Current Limit Latch Consecutive Clear Pulses required to reset IUM counter Reference Voltage Section Initial Accuracy Voltage Stability Temperature Stability ThermalMax I N T E G R A T E D LX1810 ThermoElectric Cooler Drive Controller IC P R O D U C T S P RODUCTION D ATA S HEET Parameter Symbol Test Conditions Min LX1810 Typ Max Units ` Supply Current O SHDN Current SHDN Input = 0V, TA = 25 C SHDN Input = 2V, VIN = 15V, No MOSFETs Operating Current 2.9 5.0 ‘mV 1.2 62,500 1.45 1.6 V 1.6 1.7 1.8 V ISINK = 3mA ISINK = 75mA ISOURCE = 3mA, CN = 5.2V applied externally ISOURCE = 75mA, CN = 5.2V applied externally 30 1.5 30 1.5 100 2.0 100 2.0 ‘mV V ‘mV V ISINK = 3mA ISINK = 75mA ISOURCE = 3mA, CP = 5.2V (applied externally) ISOURCE = 75mA, CP = 5.2V (applied externally) 30 1 30 1 100 1.5 100 1.5 ‘mV V ‘mV V connected (Required Number of Clock Cycles) SHDN to Output Enable SHDN Threshold ` Standby Section Standby Threshold ` Output Drivers for N-Channel MOSFETs NFET Drivers, Low Level Voltage VOL NFET Drivers, High Level Voltage VOH µA 25 WWW . Microsemi .C OM ELECTRICAL CHARACTERISTICS (CONT) Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C < TA < 70°C. Test conditions: RPWM = 49.9k, CPWM = 100pF, VDD = PVDD = 15V ` Output Drives For P-Channel MOSFETs PFET Drivers, Low Level Voltage VOL PFET Drivers, High Level Voltage VOH BLOCK DIAGRAM VDD 25 IS- 27 CLO CK 28 RPW M 5 CPW M 6 PVDD + - SYNC O SC UVLO & REFERENCE 5V Reference 220mV 10 SHDN 1 VREF 4 V25 18 CN 24 PVDD 26 CP 23 P+ 22 N+ 21 N- 20 P- CLK 5V Reference CURRENT SENSE EAO UT 14 EAIN 13 FAULT T IMER O UT PUT DRIVERS & LO G IC ERRO R AMP INAMPO UT 9 8 INPUT + 7 CLK Q R Q ELECTRICALS INPUT - S 15 FAO UT M UTE MUX INPUT AMP M UTE 17 FBK- 16 FBK+ FEEDBACK AMP STBY Copyright 2002 Rev. 1.0a, 10/21/2002 11 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 ThermalMax I N T E G R A T E D LX1810 ThermoElectric Cooler Drive Controller IC P R O D U C T S P RODUCTION D ATA S HEET DB WWW . Microsemi .C OM NOTES 28-Pin Shrink Small Outline Package SSOP Dim A B C D E F G H L M P *LC Error! Not a valid link. MILLIMETERS MIN MAX 1.65 1.85 0.25 0.38 0.13 0.22 9.90 10.50 5.00 5.60 0.65 BSC 0.05 0.21 1.73 2.00 0.65 0.95 0° 8° 7.65 7.90 0.10 − INCHES MIN MAX 0.065 0.073 0.009 0.015 0.005 0.008 0.390 0.413 0.197 0.221 0.025 BSC 0.002 0.008 0.068 0.078 0.025 0.037 0° 8° 0.301 0.311 0.004 − *Lead Coplanarity Note: 1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. Lead dimension shall not include solder coverage. MECHANICALS Copyright 2002 Rev. 1.0a, 10/21/2002 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 ThermalMax I N T E G R A T E D P R O D U C T S LX1810 ThermoElectric Cooler Drive Controller IC P RODUCTION D ATA S HEET WWW . Microsemi .C OM NOTES NOTES PRODUCT PREVIEW DATA – Information contained in this document is pre-production data, and is proprietary to Linfinity. It may not be modified in any way without the express written consent of Linfinity. Product referred to herein is not guaranteed to achieve preview, preliminary or production status and product specifications, configurations, and availability may change at any time. Copyright 2002 Rev. 1.0a, 10/21/2002 Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6