LT2940

LT2940 LINER | Alldatasheet

Document overview

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Technical content

DESCRIPTION

The L T®2940 measures a high side current and a differ- ential voltage, multiplies them and outputs a current proportional to instantaneous power . Bidirectional high side currents and bipolar voltage differences are correctly handled by the four-quadrant multiplier and push-pull output stage, which allows the L T2940 to indicate forward and reverse power fl ow. An integrated comparator with inverting and noninvert- ing open-collector outputs makes the L T2940 a complete power level monitor . In addition, an output current pro- portional to the sensed high side current allows current monitoring. The current mode outputs make scaling, fi ltering and time integration as simple as selecting ex- ternal resistors and/or capacitors. Load Monitor Alarms Above 60W

FEATURES

APPLICATIONS

n Four-Quadrant Power Measurement n ±5% Power Measurement Accuracy n 4V to 80V High Side Sense, 100V Max n Current Mode Power and Current Outputs n Output Bandwidth Exceeds 500kHz n ±3% Current Measurement Accuracy n 6V to 80V Supply Range, 100V Max n Inverting and Noninverting Open-Collector Comparator Outputs n Available in 12-Pin DFN (3mm × 3mm) and 12-Lead MSOP Packages n Board Level Power and Current Monitoring n Line Card and Server Power Monitoring n Power Sense Circuit Breaker n Power Control Loops n Power/Energy Meters n Battery Charger Metering CMP+ PMON IMON CMPOUT CMPOUT LATCH I–I+

2940 TA01a

10.0k 0A TO 10A LED ON WHEN PLOAD > 60W PLOAD = VLOAD • ILOAD VLOAD 6V TO 80V ILOAD L T2940 GND 20mΩ VIMON = ILOAD • 100 mV AVPMON = PLOAD • 20.75 mV W 24.9K 4.99k LOAD kV = kI = 20mΩ ILOAD (A) PLOAD (W) VPMON (V) 2.0 1.5 1.0 4 82 6 10 12 14 0.5 2.5 120 80V 30V 15V 10V

2940 TA01b

VLOAD =6 V 60W ALARM Monitor Output Level and Load Power L, L T , L TC, L TM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.

(Notes 1, 2) TOP VIEW DD PACKAGE 12-LEAD (3mm s 3mm) PLASTIC DFN

1 VCC

TJMAX = 125°C, θJA = 43°C/W EXPOSED PAD (PIN 13) PCB GND CONNECTION OPTIONAL CMPOUT CMPOUT CMP PMON IMON GND V CC LATCH TOP VIEW MS PACKAGE 12-LEAD PLASTIC MSOP TJMAX = 125°C, θJA = 135°C/W PIN CONFIGURATION ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE L T2940CDD#PBF L T2940CDD#TRPBF LDPP 12-Lead Plastic DFN 0°C to 70°C L T2940IDD#PBF L T2940IDD#TRPBF LDPP 12-Lead Plastic DFN –40°C to 85°C L T2940CMS#PBF L T2940CMS#TRPBF 2940 12-Lead Plastic MSOP 0°C to 70°C L T2940IMS#PBF L T2940IMS#TRPBF 2940 12-Lead Plastic MSOP –40°C to 85°C Consult L TC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container . For more information on lead free part marking, go to: http://www.linear .com/leadfree/ For more information on tape and reel specifi cations, go to: http://www.linear .com/tapeandreel/ Operating Temperature Range Lead Temperature (Soldering, 10 sec)

ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supply VCC Supply Voltage Operating Range l 68 0 V ICC Supply Current I PMON = +200μA, IIMON = +200μA (Note 2) l 2 3.5 5 mA VCC(UVLC) Supply Undervoltage Latch Clear V CC Falling l 2.3 2.5 2.7 V ΔVCC(HYST) Supply Undervoltage Hysteresis V CC Rising l 20 75 100 mV Voltage Sense V VSEN(OR) Voltage Sense Pin Operating Range V CC ≤ 12V l –0.1 V CC – 3 V 12V < VCC < 30V l –0.1 9 V V+ Pin and V– Pin V CC ≥ 30V l –0.1 18 V VV Voltage Sense Differential Input Voltage Range (Note 5) VCC < 11V l ±(VCC – 3) V VV = VV+ – VV– VCC ≥ 11V l ±8 V VV(CL) Voltage Sense Differential Clipping Limit (Note 5) VCC ≥ 12V l ±9 V IVSEN Voltage Sense Input Bias Current V+ Pin and V– Pin l –300 –100 100 nA ΔIVSEN Voltage Sense Input Offset Current ΔIVSEN = IV+ – IV– VV+ = VV– l ±50 ±150 nA Current Sense VISEN(OR) Current Sense Pin Operating Range I+ Pin and I– Pin l 48 0 V VI Current Sense Differential Input Voltage Range (Note 6) V I = VI+ – VI– l ±200 mV VI(CL) Current Sense Differential Clipping Limit (Note 6) l ±225 mV IISEN Current Sense Input Bias Current I+ Pin and I– Pin l 75 100 125 μA ΔIISEN Current Sense Input Offset Current ΔIISEN = II+ – II– VI+ = VI– l ±200 ±800 nA Power Monitor (Note 2) IPMON(OR) Power Monitor Output Current Operating Range l ±200 μA IPMON(CAPA) Power Monitor Output Current Capability V CC ≥ 12V , VPMON ≥ 0V, and VV = –9V , VI = –225mV , or VV = 9V , VI = 225mV l 900 1200 μA VCC ≥ 12V , VPMON ≥ 0.5V, and VV = –9V , VI = 225mV , or VV = 9V , VI = –225mV l –240 –1200 μA VCC ≥ 12V , VPMON ≥ 4V, and VV = –9V , VI = 225mV , or VV = 9V , VI = –225mV l –800 –1200 μA The l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. All specifi cations apply at 6V ≤ VCC ≤ 80V , unless otherwise specifi ed.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VPMON Power Monitor Output Compliance Voltage V CC ≤ 12V, IPMON ≥ 0μA l 0V CC – 4.5 V 12V < VCC < 30V , IPMON ≥ 0μA l 0 7.5 V VCC ≥ 30V, IPMON ≥ 0μA l 01 2 V VCC ≤ 12V, IPMON < 0μA l 0.5 V CC – 4.5 V 12V < VCC < 30V , IPMON < 0μA l 0.5 7.5 V VCC ≥ 30V, IPMON < 0μA l 0.5 12 V EPMON Power Monitor Output Total Error (Note 4) |V V • VI| ≤ 0.4V2 ±2 ±5 %FS |VV • VI| ≤ 0.4V2, L T2940C l ±2.5 ±9 %FS |VV • VI| ≤ 0.4V2, L T2940I l ±3.5 ±12 %FS Quadrants I and III of Shaded Region in Figure 4 l ±5 ±15 %FS KPMON Power Monitor Scaling Coeffi cient IPMON = KPMON • VV • VI |VV • VI| = 0.4V2 l 485 500 515 μA /V 2 VV(OSP) Power Monitor Voltage Sense Input-Referred Offset Voltage V V = 0V l ±40 ±100 mV VI(OSP) Power Monitor Current Sense Input-Referred Offset Voltage VI = 0mV l ±2 ±6 mV IPMON(OS) Power Monitor Output Offset Current V V– = 0V, VI = 0mV l ±6 ±15 μA BWPMON Power Monitor Output Bandwidth R PMON = 2k 0.5 MHz Current Monitor (Note 2) IIMON(FS) Current Monitor Output Current Operating Range l ±200 μA VIMON Current Monitor Output Compliance Voltage V CC ≤ 12V, IIMON ≥ 0μA l 0V CC – 4.5 V 12V < VCC < 30V , IIMON ≥ 0μA l 0 7.5 V VCC ≥ 30V, IIMON ≥ 0μA l 01 2 V VCC ≤ 12V, IIMON < 0μA l 0.5 V CC – 4.5 V 12V < VCC < 30V , IPMON < 0μA l 0.5 7.5 V VCC ≥ 30V, IPMON < 0μA l 0.5 12 V EIMON Current Monitor Output Total Error (Note 4) |V I| ≤ 200mV , 25°C ≤ TA ≤ 85°C ±1.5 ±3 %FS |V I| ≤ 200mV , L T2940C l ±2 ±3.5 %FS |V I| ≤ 200mV , L T2940I l ±2 ±4 %FS 200mV < |V I| ≤ 225mV l ±2.5 ±5 %FS GIMON Current Monitor Scaling, IIMON = GIMON • VI VI = ±200mV l 975 1000 1025 μA /V VI(OSI) Current Monitor Current Sense Input-Referred Offset Voltage l ±2.5 ±7 mV BWIMON Current Monitor Output Bandwidth R IMON = 2k 1 MHz Comparator V CMP(TH) Comparator Threshold Voltage CMP + Rising l 1.222 1.240 1.258 V ΔVCMP(HYST) Comparator Threshold Hysteresis CMP + Falling l –15 –35 –60 mV ICMP(BIAS) Comparator Input Bias Current 1V ≤ V CMP+ ≤ 1.5V l ±100 ±300 nA ICMPOUT(OL) CMPOUT Output Low Voltage CMP + High, ICMPOUT = 3mA l 0.2 0.4 V ELECTRICAL CHARACTERISTICS The l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. All specifi cations apply at 6V ≤ VCC ≤ 80V , unless otherwise specifi ed.

VI (mV) –200 400 600 200 0 200 –200 –400 800

2940 G01

VV = –8V –4V VV = VV+ – VV– VI = VI+ – VI– VCC ≥ 11V VPMON = 0.5V –2V 8V4V IPMON (μA) VI (mV) –200 0–100 100 200

2940 G02

VV = 8V VV = 8V –4V |VV • VI| ≤ 0.4V2 TA = 25°C –2V EPMON (%FS) ONE REPRESENTATIVE UNIT TEMPERATURE (°C) –50 EPMON (%FS) 0 50 75 –25 25 100 125

2949 G03

–8V ≤ VV ≤ 8V –200mV ≤ VI ≤ 200mV |VV • VI| ≤ 0.4V2 VCC = 12V VCC = 80V VCC = 80V VCC = 12V Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All currents into pins are positive, and all voltages are referenced to GND unless otherwise noted. Current sourced by the PMON pin or the IMON pin is defi ned as positive; current sunk as negative. Note 3: The L T2940 may safely drive its own PMON and IMON output voltages above the absolute maximum ratings. Do not apply any external source that drives the voltage above absolute maximum. Note 4: Full-scale equals ±200μA. Note 5: V + and V– pin voltages must each fall within the voltage sense pin operating range specifi cation. Note 6: I+ and I– pin voltages must each fall within the current sense pin operating range specifi cation. ELECTRICAL CHARACTERISTICS The l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. All specifi cations apply at 6V ≤ VCC ≤ 80V , unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ICMPOUT(LK) CMPOUT Leakage Current CMP + Low, VCC = 36V , 0.4V ≤ VCMPOUT ≤ 36V l ±0.15 ±1 μA ICMPOUT(OL) CMPOUT Output Low Voltage CMP + Low, ICMPOUT = 3mA l 0.2 0.4 V ICMPOUT(LK) CMPOUT Leakage Current CMP + High, VCC = 36V , 0.4V ≤ VCMPOUT ≤ 36V l ±0.15 ±1 μA tDL Y Comparator Propagation Delay Output Pulling Down l 0.7 2 μs VLATCH(IL) LATCH Input Low Voltage l 0.5 0.8 1.2 V VLATCH(IO) LATCH Input Open Voltage l 1.25 1.5 1.95 V VLATCH(IH) LATCH Input High Voltage l 2.0 2.2 2.5 V ILATCH(LK) LATCH Input Allowable Leakage in Open State l ±10 μA ILATCH(BIAS) LATCH Input Bias Current V LATCH = 0V l –11 –17 –23 μA VLATCH = 80V l 11 17 23 μA TYPICAL PERFORMANCE CHARACTERISTICS PMON Output Current vs Sense Input Voltages PMON Total Error vs Sense Input Voltages PMON Error Band vs Temperature

–1500 –1000 –500 500 1500 –2 0

2940 G04

VPMON = 0V VPMON = 0.5V IPMON (μA) VV • VI (V2) VCC ≥ 15V VV = 40 • VI VPMON = 4V –300 –200 –100 100 300

2940 G05

I = 200μA OUTPUT CURRENT (μA) OUTPUT VOLTAGE (V) TA = 25°C VCC = 6V VCC = 12V VCC = 30V I = –200μA VCC = 6V VCC = 12V VCC = 30V 2.4 2.6 2.8 3.0 3.2 3.6 20 40

2940 G06

3.4 IPMON = 200μA

IIMON = 200μA IPMON = 0μA IIMON = 0μA ICC (mA) VCC (V) IPMON = –200μA IIMON = –200μA –300 –300 –200 –100 100 300 –200 –100 0 100

2940 G07

VIMON = 0V VIMON = 0.5V IIMON (μA) VI (mV) VI = VI+ – VI– OUTPUT CURRENT IS APPROXIMATEL Y FLAT TO ABSOLUTE MAXIMUM VOL TAGE LIMITS VI (mV) –200 0 200

2940 G08

EIMON (%FS) VCC = 12V VCC = 80V ONE REPRESENTATIVE UNIT TEMPERATURE (°C) –50 EIMON (%FS) 0 50 75 –25 25 100 125

2949 G09

–200mV ≤ VI ≤ 200mV VI– = 12V VCC = 12V VCC = 80V VCC = 80V VCC = 12V TYPICAL PERFORMANCE CHARACTERISTICS PMON Current vs Power Sense Product PMON and IMON Voltage Compliance Supply Current vs Supply Voltage IMON Current vs Current Sense Voltage IMON Total Error vs Current Sense Voltage IMON Error Band vs Temperature PMON Step Response PMON Step Response IMON Step Response 500ns/DIV VIMON 200mV/DIV

2940 G10

RPMON = 2k ON 2VDC BIAS CL = 8pF VCC = 12V TA = 25°C VV = ±2V VI = 200mV 250ns/DIV VIMON 200mV/DIV

2940 G11

RPMON = 2k ON 2VDC BIAS CL = 8pF VCC = 12V TA = 25°C VI = ±200mV VV = 2V 250ns/DIV VIMON 200mV/DIV

2940 G12

RIMON = 2k ON 2VDC BIAS CL = 8pF VCC = 12V TA = 25°C VI = ±200mV

TYPICAL PERFORMANCE CHARACTERISTICS PMON Input Feedthrough vs Frequency PMON Frequency Response to Voltage Sense PMON Frequency Response to Current Sense IMON Frequency Response to Current Sense Open Collector Current vs Open Collector Voltage Power Supply Rejection Ratio vs Frequency FREQUENCY (Hz) SEE TEST CIRCUITS FOR LOADING CONDITIONS –30PMON OUTPUT SIGNAL (dBVPK) –10 100 100k 1M 10M –60 –50 1k 10k –20 –40

2940 G14

VV = ±2VPK VI = 0mV , dV = 0 VI = ±200mVPK VV = 0V , dI = 0 RELATIVE TO ±1VPK RPMON = 5k ON 2VDC BIAS TA = 25°C FREQUENCY (Hz) SEE TEST CIRCUITS FOR LOADING CONDITIONS –30RELATIVE PMON VOL TAGE (dBVPK) –10 100 100k 1M 10M –40 1k 10k –20

2940 G15

VV = ±2VPK VI = 200mVDC IPMON = ±200μAPK (NOM) TA = 25°C RL = 2k I-TO-V AMP OUTPUT RL = 5k RELATIVE TO DC GAIN FREQUENCY (Hz) SEE TEST CIRCUITS FOR LOADING CONDITIONS –30RELATIVE PMON VOL TAGE (dBVPK) –10 100 100k 1M 10M –40 1k 10k –20

2940 G16

VV = 2VDC VI = ±200mVPK IPMON = ±200μAPK (NOM) TA = 25°C RL = I-TO-V AMP OUTPUT RL = 5k RELATIVE TO DC GAIN FREQUENCY (Hz) SEE TEST CIRCUITS FOR LOADING CONDITIONS –30RELATIVE IMON VOL TAGE (dBVPK) –10 100 100k 1M 10M –40 1k 10k –20

2940 G17

VI = ±200mVPK IIMON = ±200μAPK (NOM) TA = 25°C RL = I-TO-V AMP OUTPUT RL = 5k RELATIVE TO DC GAIN FREQUENCY (Hz) REJECTION RATIO (dBV) 100 100k 1M 10M 1k 10k

2940 G13

VCC = 12V RPMON = 5k ON 2VDC BIAS RIMON = 5k ON 2VDC BIAS TA = 25°C IMON PMON OPEN COLLECTOR VOL TAGE (V) 0.1 OPEN COLLECTOR CURRENT (mA) 1 10

2940 G18

TA = 25°C OUTPUT PULLING LOW VCC = 6V VCC = 80V

CMPOUT (Pin 1): Inverting Open-Collector Comparator Output. When the LATCH pin’s state does not override the comparator , CMPOUT pulls low when CMP + > 1.24V . The pull-down shuts off when CMP+ < 1.21V , or VCC < 2.5V or when the LATCH pin is low. CMPOUT may be pulled up to 36V maximum. Do not sink more than 22mA DC. CMPOUT (Pin 2): Noninverting Open-Collector Comparator Output. When the LATCH pin’s state does not override the comparator , CMPOUT pulls low when CMP + < 1.21V , or VCC < 2.5V , or when the LATCH pin is low. The pull-down shuts off when CMP+ > 1.24V . CMPOUT may be pulled up to 36V maximum. Do not sink more than 22mA DC. CMP+ (Pin 3): Positive Comparator Input. The integrated comparator resolves to high when the pin voltage exceeds the 1.24V internal reference. The comparator input has 35mV of negative hysteresis, which makes its falling trip point approximately 1.21V . Do not exceed 36V . Tie CMP to GND if unused. PMON (Pin 4): Proportional-to-Power Monitor Output. This push-pull output sources or sinks a current proportional to the product of the voltage sense and current sense inputs. A resistor from PMON to GND creates a positive voltage when the power product is positive. The full-scale output of ±200μA is generated for a sense input product of ±0.4V 2. Do not exceed VCC + 1V , up to 16V maximum. Tie PMON to GND if unused. IMON (Pin 5): Proportional-to-Current Monitor Output. This push-pull output sources or sinks a current propor- tional to the voltage at the current sense input, which is typically generated by a sense resistor that measures a current. A resistor from IMON to GND creates a positive voltage when the sensed current is positive. The full-scale output of ±200μA is generated by a current sense input of ±200mV . Do not exceed V CC + 1V , up to 16V maximum. Tie IMON to GND if unused. GND (Pin 6): Device Ground. V+, V – (Pins 8, 7): Voltage Sense Inputs. The voltage difference between these pins is the voltage input factor to the power calculation multiplier . The difference may be positive or negative, but both pin voltages must be at or above GND – 100mV . The input differential voltage range is ±8V . Do not exceed 36V on either pin. LATCH (Pin 9): Comparator Mode Input. Conditions at this three-state input pin control the comparator’s behavior . When LATCH is open, the comparator’s outputs track its input conditions (with hysteresis). When LATCH is held above 2.5V , the comparator’s outputs latch when CMP exceeds 1.24V (CMPOUT open, CMPOUT pull-down). While LATCH ≤ 0.5V or VCC < 2.5V , the comparator’s outputs clear (CMPOUT pull-down, CMPOUT open) regardless of the CMP+ pin voltage. The LATCH pin high impedance input state tolerates ±10μA of leakage current. Bypass this pin to GND to compensate for high dV/dt on adjacent pins. Do not exceed 100V on this pin. I +, I– (Pins 11, 10): Current Sense Inputs. The voltage differ- ence at these pins represents the current input factor to the power calculation multiplier and to the current scaler . The difference may be positive or negative, but both pin voltages must be at least 4V and no more than 80V above GND, completely independent of the V CC voltage. Both pins sink approximately 100μA of bias current in addition to having an effective 5kΩ shunt between them. The input differential voltage range is ±200mV . Do not exceed ±36V differ- entially or 100V on either pin. V CC (Pin 12): Voltage Supply. The voltage supply operat- ing range is 6V to 80V . When operating with VCC > 15V , package heating can be reduced by adding an external series dropping resistor . Bypass this pin to GND to improve supply rejection at frequencies above 10kHz as needed. Do not exceed 100V on this pin. Exposed Pad (Pin 13 in DFN Package): The exposed pad may be left open or connected to device ground. For best thermal performance, the exposed pad must be soldered to the PCB.

1.24V UVLC LATCHLO LATCHHI IMON PMON CMPOUT CMPOUT 2940 BD VCC GND VCC

3 CMP+

9 LATCH

–BGAP REF AND UVLC DQ CLR LE 4-QUADRANT MUL TIPLIER THREE-STATE DECODE KPMON = 500 μA GIMON = 1000 μA V PMON OR IMON

2940 TC02

499ΩRFB 4.99k PMON OR IMON

2940 TC01

Resistor on DC Bias I-to-V Amplifi er

circuits necessary to measure, monitor and control power . conditions, time-varying signals, and so forth. output pins are summarized in Table 1 for easy reference. Figure 1. L T2940 Signal Path Diagram

2940 F01

Table 1. L T2940 Essential Operating Parameters to Achieve Specifi ed Accuracy (VCC Operating Range = 6V to 80V)

• The current sense range is completely independent of the supply voltage.

Figure 2. PMON Output Current as a Function

2940 F02VV = VV+ – VV– (V)

using the root sum-of-squares (RSS) method. the RSS method of totaling errors. Figure 3. Basic Power Sensing Application Showing Derivation of kV and kI

2940 F03

inputs must not exceed ±8V and ±200mV , respectively. Electrical Characteristics section. absolute maximum ratings, are clipped internally. naturally fi t into the operating range of the L T2940.

2940 F04

Figure 5. Various Constant-Power Curves in Quadrant I

2940 F05

Figure 4. Multiplier Operating Regions vs Sense Input

Figure 6. LATCH Pin Protective Damping dissipation in the sense resistor . tion in the current sense resistor . of approximately 6.4kHz on the power monitor voltage. portional to the time-integral of power , which is energy. makes falling inputs trip the comparator at about 1.21V . pulled up externally to 36V maximum.

2940 F06

Figure 7. Supply Resistor Reduces Package Heating by Reducing VCC Voltage current (low), while the CMPOUT pin goes open (high). V–, PMON and IMON pins are, however , limited by VCC.

2940 F07

120W Supply Monitor Includes ICC of L T2940 CMP+ PMON IMON CMPOUT CMPOUT LATCH I–I+

2940 TA02

10.0k 5mA MAX 0A TO 4A VPMON 13.7k 6.19k OVP SUPPL Y 30V TO 80V 100V (MAX) OVERPOWER (OVP) GOES HIGH WHEN SUPPL Y POWER > 120W RS L T2940 GND R12 3.9k 1/8W 50mΩ VLOGIC R14 3.9k SCALE = 30 120W FULL-SCALE W V kV = kI = 50mΩ 12.5W PWM Heat Source CMP+ IMONPMON CMPOUT CMPOUT LATCH I–I+VCC

2940 TA03

25.5k FDS3672 INPUT 9.5V TO 14.5V R S L T2940 GND 200mΩ 15.0k 4.7μF * SEVEN 50Ω, 5W RESISTORS IN PARALLEL. MUL TIPLE UNITS FACILITATE SPREADING HEAT . 100μF 25V kV = kI = tOFF z1.7ms 200mΩ HEATSINK Q = 12.5W 10k 10k 2N3906 TP0610 R7* 1N5819

Wide Input Range 10W PWM Heat Source PMON IMON I– I+VCC

2940 TA04

25.5k 51Ω Q1 VN2222D1 1N457 27V 10A/V 10V TO 40V RS L T2940 GND 200mΩ 6.8k 3.3k 470pF 22nF 10k 680Ω R 10k TIP129 HEATSINK Q = 30W D44VH11 R10 100Ω R11 100mΩ kV = kI = 200mΩ 100μF 50V CMP+ IMONPMON CMPOUT CMPOUT LATCH I–I+VCC

2940 TA05

22.4V TO 72V RS L T2940 GND 200mΩ 68k 4.7μF 100μF 100V kV = kI = tOFF z2ms 200mΩ 233 HEATSINK Q = 10W 10k 10k R7 50Ω 25W 2N3906 12V MUR1100E FDS3672 220k 13k 1N4148 100nF 12V

8V to 32V , 8W Load Adjustable 0W to 10W Load Box with UVLO and Thermal Shutdown PMONIMON I– I+VCC

2940 TA06

200mΩ L T2940 GND 12V 12V kV = kI = 200mΩ 30k 10k 6.8Ω 10W LM334 1N457 6.8k 100nF 100nF 200μA/A CURRENT MONITOR OUTPUT 680Ω R 10Ω CMP+ PMON IMON CMPOUTCMPOUT LATCH I+VCC

2940 TA07

2N3904* FDB3632 1A/V CURRENT MONITOR OUTPUT I CONTROL = 50mW/μA 10V TO 40V INPUT L T2940 GND 12V 12V 12V L T1635 0W TO 10W ADJ 10-TURN REF 200mV kV = kI = 200mΩ R12 12k R10 500Ω TEMP ADJ *THERMAL SHUTDOWN; COUPLE TO Q1’s HEAT SINK 1N4003 4.99k R13 10k R3A 13k UVLO RS 200mΩ R3B 91k R14 10Ω 30k 120k C11 10nF R11 33Ω 2N3906 R17 100Ω R18 R16 10k R15 10k C13 10nF R19 10k OAQ3 2N3906

1-Cell Monitor with Bottom-Side Sense Motor Monitor with Circuit Breaker CMP+ PMONIMON CMPOUT CMPOUT RESET LATCH I–I+VCC

2940 TA09

1% MUR120 10k R2B 10k FDB3632 V PMON 100W/V VIMON 6.5A/V 12V RS L T2940 GND GE 5BPA34KAA10B 12V , 8A PM FIELD 25mΩ 12.4k 33nF 4.99k 100nF C10 100μF 25V 10k kV = kI = OVERCURRENT TRIP = 8A 25mΩ IMON PMON I–I+VCC

2940 TA08

kV = = 0.8 kI = 200mΩ 121 151 R12 12V 12V 200mV CYCLON 2V , 4.5AH DT CELL* LOAD CHARGER– 121k 4.99k 30k 12.4k 1W/V ±2.5W MAX 1A/V ±1A MAX RS1 215Ω RS2 215Ω REF OA 2N3904 *www.hawkerpowersource.com (423) 238-5700 2N3904 5.1V 200Ω 200Ω R 200mΩ LOAD+ CHARGER+

28V Power to Frequency Converter Secondary-Side AC Circuit Breaker CMP+ PMON IMON CMPOUT CMPOUT LATCH IN+ IN– HYST REF I–I+VCC

2940 TA10

R S L T2940 GND 200mΩ 2.2nF R4B 10k D2R4A 240k 10nF 10V CENTRAL SEMI CCLM2700 kV = kI = 200mΩ PMAX = 10W fOUT = 10W 1000Hz = 1N4148 = 2N7000 R5, 100k VCC R6, 100k VCC 1μF WIMA V– GND OUT 100nF VCC L TC1440 CMP+ IMON PMON CMPOUT CMPOUT LATCH I–I+VCC

2940 TA11

200mΩ 5.1V 12.6VAC SECONDARY kV = = kI = 200mΩ 150 1N4001 R12 10k R11 10k 1N4001 10W/V 30W PK 1A/V PK 1.25A TRIP C1B 220μF 25V C1A 220μF 25V 10Ω RESISTIVE LOAD R10 15k 15k Q1 Q2 Q6 Q7 VCC 120k FDS3732 10k R1 30k = 2N3906

AC Power and Current Monitor Fully Isolated AC Power and Current Monitor IMON PMON I–I+VCC VCC VCC

2940 TA13

10.8V 117V 500 4.99k ISOLATION BARRIER 4.22k R12 1k R1A 68.1Ω R1B 68.1Ω 1kW/V ±853 W PK 10A/V ±10APK C12 100nF 5.1V 47μF 25V RS1 4.99Ω RS2 4.99Ω 10k 10k D3 D5 100nF R2B 200Ω R2A 200Ω 117V “N” 117V “L” = 1N4148 T1 = MINNTRONIX 4810966R T2 = 1168:108 POTENTIAL TRANSFORMER IN CONSTRUCTING THIS CIRCUIT , THE CUSTOMER AGREES THAT , IN ADDITION TO THE TERMS AND CONDITIONS ON LINEAR TECHNOLOGY CORPORATION’S (L TC) PURCHASE ORDER DOCUMENTS, L TC AND ANY OF ITS EMPLOYEES, AGENTS, REPRESENTATIVES AND CONTRACTORS SHALL HAVE NO LIABILITY, UNDER CONTRACT , TORT OR ANY OTHER LEGAL OR EQUITABLE THEORY OF RECOVERY, TO CUSTOMER OR ANY OF ITS EMPLOYEES, AGENTS, REPRESENTATIVES OR CONTRACTORS, FOR ANY PERSONAL INJURY, PROPERTY DAMAGE, OR ANY OTHER CLAIM (INCLUDING WITHOUT LIMITATION, FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES) RESUL TING FROM ANY USE OF THIS CIRCUIT , UNDER ANY CONDITIONS, FORESEEABLE OR OTHERWISE. CUSTOMER ALSO SHALL INDEMNIFY L TC AND ANY OF ITS EMPLOYEES, AGENTS, REPRESENTATIVES AND CONTRACTORS AGAINST ANY AND ALL LIABILITY, DAMAGES, COSTS AND EXPENSES, INCLUDING ATTORNEY’S FEES, ARISING FROM ANY THIRD PARTY CLAIMS FOR PERSONAL INJURY, PROPERTY DAMAGE, OR ANY OTHER CLAIM (INCLUDING WITHOUT LIMITATION, FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES) RESUL TING FROM ANY USE OF THIS CIRCUIT , UNDER ANY CONDITIONS, FORESEEABLE OR OTHERWISE. LOAD IMONPMON I–I+VCC

2940 TA12

200mΩ 15k 5.1V 12.6VAC SECONDARY kV = kI = 200mΩ C1A 220μF 25V 1N4001 120k 30k 1N4001 1A/V ±3APK 15k 10W/V ±30WPK C1B 220μF 25V 10Ω LOAD kV = + ++ + =68 1 68 1 200 200 68 1 68 1 108 1168 42 5 ..  . 88 49 9 49 9 500 501kI = + =..

3.00 ±0.10 (4 SIDES) NOTE: 1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD AND TIE BARS SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 0.40 ± 0.10 BOTTOM VIEW—EXPOSED PAD 1.65 ± 0.10 0.75 ±0.05 R = 0.115 TYP 127 PIN 1 TOP MARK (SEE NOTE 6)

0.200 REF

0.00 – 0.05 (DD12) DFN 0106 REV A RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED 0.23 ± 0.05 0.25 ± 0.05

2.25 REF

2.38 ±0.05 0.70 ±0.05 3.50 ±0.05 PACKAGE OUTLINE PIN 1 NOTCH R = 0.20 OR 0.25 × 45° CHAMFER 2.38 ±0.10

0.45 BSC

12-Lead Plastic DFN (3mm × 3mm) (Reference L TC DWG # 05-08-1725 Rev A)

Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However , no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. PACKAGE DESCRIPTION MSOP (MS12) 1107 REV Ø 0.53 p 0.152 (.021 p .006) SEATING PLANE 0.18 (.007) 1.10 (.043) MAX 0.22 – 0.38 (.009 – .015) TYP 0.86 (.034) REF 0.650 (.0256) BSC 12 11 10 9 8 7 NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 0.254 (.010) 0o – 6o TYP DETAIL “A” DETAIL “A” GAUGE PLANE 5.23 (.206) MIN 3.20 – 3.45 (.126 – .136) 0.889 p 0.127 (.035 p .005) RECOMMENDED SOLDER PAD LAYOUT 0.42 p 0.038 (.0165 p .0015) TYP 0.65 (.0256) BSC 4.039 p 0.102 (.159 p .004) (NOTE 3) 0.1016 p 0.0508 (.004 p .002) 12 345 6 3.00 p 0.102 (.118 p .004) (NOTE 4) 0.406 p 0.076 (.016 p .003) REF 4.90 p 0.152 (.193 p .006) 12-Lead Plastic MSOP (Reference LTC DWG # 05-08-1668 Rev Ø)

Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear .com © LINEAR TECHNOLOGY CORPORATION 2009 LT 1109 • PRINTED IN USA RELATED PARTS TYPICAL APPLICATION PART NUMBER DESCRIPTION COMMENTS L TC1966 Precision Micropower Delta-Sigma RMS-to-DC Converter 2.7V to 12V Supply Voltage, 170μA Supply Current L TC1968 Precision Wide Bandwidth RMS-to-DC Converter 4.5V to 6V Supply Voltage, 500kHz 3dB-Error BW L TC6101/ L TC6101HV High Voltage, High Side, Precision Current Sense Amplifi ers 4V to 60V/ 5V to 100V, Gain Confi gurable, SOT-23 L TC6104 Bidirectional High Side, Precision Current Sense Amplifi er 4V to 60V, Gain Confi gurable, 8-Pin MSOP L TC6106 Low Cost, High Side Precision Current Sense Amplifi er 2.7V to 36V, Gain Confi gurable, SOT23 L TC4151 High Voltage I 2C Current and Voltage Monitor Wide Operating Range: 7V to 80V L TC4215 Positive Hot Swap Controller with ADC and I 2C 8-Bit ADC Monitoring Current and Voltages, Supplies from 2.9V to 15V L T4256-1/ L T4256-2 Positive 48V Hot Swap Controllers with Open- Circuit Detect Foldback Current Limiting, Open-Circuit and Overcurrent Fault Output, Up to 80V Supply L TC4260 Positive High Voltage Hot Swap Controller With ADC and I2C Monitoring Wide Operating Range: 8.5V to 80V L TC4261 Negative Voltage Hot Swap Controller With ADC and I2C Monitoring Floating Topology Allows Very High Voltage Operation Integrating Watt-Hour Meter CMP+ PMON IMON CMPOUT IN 6V TO 80V

1024 COUNTS

= 1 WATT-HOUR CD4040 0A TO 2A S1B S2B S3B CB+ CB– S4B OUT ADJ SHDN RESET F L T3014 CMPOUT LATCH I–I+ L T2940 CT 2.2μF C16 1μF

2940 TA14

Q GND L TC6702 GND L TC6943 12V R14 20.0k R13 4.99k C18 0.1μF 215k 11.3k RESET RS 100mΩ R17 309k R18 49.9k R16 100k C17 0.47μF 1μF R15 24.9k 2N7002 GND S1A S2A S3A CA CA– LOAD (80W MAX) S4A C19 0.1μF C20 0.1μF kV = kI = 100mΩ