MPQ8112

MPQ8112 MPSIND | Alldatasheet

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Technical content

60V, High-Side Current-Sense Amplifier, AEC-Q100 Qualified MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 1 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved.

DESCRIPTION

The MP Q8112 and MPQ8112A are low-cost, unipolar, high-side current -sense amplifier s. The devices operate from a 2.7V to 60V supply and typically consum e a 300µA current. They are ideal for today’s automotive systems, industrial supplies, and systems where battery/DC current monitoring is critical. High-side current monitoring is especially useful in battery -powered systems , since it does not interfere with the ground path of the battery charger. The common mode input ranges between 0V and 60V with a 700kHz h igh bandwidth. That makes these devices suitable for use in inside control and short -circuit protection loops. The MPQ8112 directly converts a differential input voltage to a voltage output with built -in internal common input resistors and a load resistor. The MPQ8112 has a 50V/V gain. The MPQ8112A converts the differential input voltage to a current output. This current is converted back to a voltage with an external load resistor. The MPQ8112A has an adjustable gain based on the external common input resistors and load resistor. Both the MPQ8112 and MPQ8112A are available in TSOT23-6L packages. MPQ8112 FAMILY VERSIONS Part Number Output Gain MPQ8112 50V/V MPQ8112A Adjustable

FEATURES

 Low-Cost, Compact Current-Sense Solution  700kHz Bandwidth  300µA Typical Supply Current  2.7V to 60V Operating Supply Voltage  0V to 60V Common Mode Input Range  0.2µA Typical Shutdown Current  300µV Input Offset Voltage  Available with Fixed 50V/V Gain (MPQ8112), or Adjustable Gain (MPQ8112A)  ±1% Current-Sense Gain Accuracy  High-Current Sensing Capabilities  Available in a 6-Lead TSOT23 Package  Available in AEC-Q100 Grade 1

APPLICATIONS

 Advanced Driver Assistance Systems (ADAS)  Sensor Fusion Systems  Electric Power Steering (EPS) Systems  Electronic Stability Control (ESC) Systems  Brake Systems  Battery-Operated Systems  Energy Management Systems All MPS parts are lead -free, halogen -free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are trademarks of Monolithic Power Systems, Inc. or its subsidiaries.

MPQ8112/MPQ8112A – 60V, HIGH-SIDE, CURRENT-SENSE AMPLIFIER MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 3 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved.

ORDERING INFORMATION

Part Number* Package Top/Bottom Markings MSL Rating** MPQ8112GJ-AEC1 TSOT23-6L See Below 1 MPQ8112AGJ-AEC1 TSOT23-6L See Below * For Tape & Reel, add suffix –Z (e.g. MPQ8112GJ-AEC1–Z). ** Moisture Sensitivity Level Rating TOP MARKING Part Number Top Marking Bottom Marking Definitions MPQ8112GJ-AEC1 AXD: Product code Y: Year code C: Suffix LLL: Lot number MPQ8112AGJ-AEC1 BML: Product code Y: Year code LLLL: Lot number PACKAGE REFERENCE GND VCC OUT RG2 RG1 TSOT23-6L

MPQ8112/MPQ8112A – 60V, HIGH-SIDE, CURRENT-SENSE AMPLIFIER MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 4 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. PIN FUNCTIONS Pin # Name Description 1 OUT Output. The MPQ8112 does not require an external resistor, so the OUT pin can be left floating. For the MPQ8112A, connect an external resistor to OUT to set the gain.

2 RG2

Negative gain resistor. For the MPQ8112, connect RG2 directly to the load side of the current-sense resistor, as closely as possible. For the MPQ8112A, connect RG2 to the load side of the current-sense resistor through a gain resistor (RG2). RG2 should be below 4kΩ to obtain high current-sense accuracy. It is recommended for RG2 and RG1 to equal 1kΩ.

3 RG1

Positive gain resistor. For the MPQ8112, connect RG1 directly to the power side of the current-sense resistor, as closely as possible . For the MPQ8112A, connect RG1 to the power side of the current-sense resistor through a gain resistor ( RG1). RG1 should be below 4kΩ to obtain the high current-sense accuracy. It is recommended for RG1 to equal 1kΩ. 4 VCC Power input. Place a bypass capacitor between V CC and GND , as close as possible. A 0.1µF to 1µF low-ESR ceramic capacitor is recommended. 5 GND Ground. 6 V5 Power supply for internal trim and control block. Pull V5 above its 2V upper threshold to enable the part. Pull V5 below its 1.9V lower threshold to disable the part. The power source connected to V5 must be able to output a current above 1mA. Place a bypass capacitor between V5 and GND . A 10nF to 100nF low-ESR ceramic capacitor is recommended. ABSOLUTE MAXIMUM RATINGS (1) Differential input voltage (VRG1 - VRG2)... ±400mV Continuous power dissipation (TA = 25°C) (2) ESD Ratings (3) Recommended Operating Conditions Thermal Resistance (5) θJA θJC Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature , TJ (MAX), the junction -to- ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by P D (MAX) = (T J (MAX) - TA) / θJA. Exceeding the maximum allowable power dissipation will cause excessive die temp erature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) These d evices are ESD -sensitive. It is recommended to handle them with precaution. 4) It is possible to operate the devices at junction temperature s above 125°C. Contact an MPS FAE for details. 5) The value of θJA given in this table is only valid for comparison with other packages and cannot be used for design purposes. These values were calculated in accordance with JESD51 -7, and simulated on a specified JEDEC board. They do not represent the performance obtained in an actual application.

MPQ8112/MPQ8112A – 60V, HIGH-SIDE, CURRENT-SENSE AMPLIFIER MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 5 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

VCC = 12V, VRG1 = 12V, TA = -40°C to +125°C, typical values at TJ = 25°C. RG1 = RG2 = 0Ω, and ROUT not used for the MPQ8112. RG1 = RG2 = 1kΩ, and ROUT = 10kΩ for the MPQ8112A. All unless otherwise noted. Parameter Symbol Conditions Min Typ Max Units Supply voltage VCC 2.7 60 V Common mode input voltage VCM 0 VCC V V5 supply voltage V5 2.7 5.5 V Supply current ICC + IV5 VSENSE = 0, VCC = 60V, V5 = 5V 300 360 µA Common mode input rejection (6) CMR VSENSE = 100mV, VCC = 60V, VCM1 = 60V, VCM2 = 22V 65 90 dB Full-scale sense voltage VSENSE VSENSE = VRG1 - VRG2 200 mV Input offset voltage (7) VOS VCM = 12V, VSENSE1 = 100mV, VSENSE2 = 20mV 0.3 1 mV Input bias current IRG1, IRG2 VCM = 12V 0.25 1 µA Current-sense gain GM TJ = 25°C 4.95 5 5.05 A/A TJ = -40°C to +125°C 4.9 5 5.1 Output voltage gain AV MPQ8112, VSENSE = 100mV, VCM = 12V, TJ = 25°C 49.5 50 50.5 V/V MPQ8112, VSENSE = 100mV, VCM = 12V, TJ = -40°C to +125°C 49 50 51 Bandwidth (8) BW COUT = 5pF 700 kHz Power supply rejection ratio (9) PSRR VCC1 = 60V, VCC2 = 2.7V, VSENSE = 24mV 70 80 dB V5 upper threshold voltage VTH_UPPER 1.3 2 2.5 V V5 lower threshold voltage VTH_LOWER 1.2 1.9 2.4 V V5 shutdown supply current ICC(SHDN) V5 = 1V 0.2 2 µA Output respond time (8) RG1 = RG2 = 1kΩ, ROUT = 10kΩ, VSENSE = 5mV to 100mV, VOUT from 10% to 90% 500 ns RG1 = RG2 = 1kΩ, ROUT = 10kΩ, VSENSE = 100mV to 5mV, VOUT from 10% to 90% 500 Notes: 6) CMR = 20 x log[(VCM1 - VCM2) / (VOUT1 - VOUT2)]. VOUT1 is the output voltage at VCM1, and VOUT2 is the output voltage at VCM2. 7) VOS = VSENSE1 - VOUT1 / [(VOUT1 - VOUT2) / (VSENSE1 - VSENSE2)]. VOUT1 is the output voltage at VSENSE1, and VOUT2 is the output voltage at VSENSE2. 8) Not tested in production. Guaranteed by design and characterization. 9) PSRR = 20 x log[(VCC1 - VCC2) / (VOUT1 - VOUT2)]. VOUT1 is the output voltage at VCC1, and VOUT2 is the output voltage at VCC2.

MPQ8112/MPQ8112A – 60V, HIGH-SIDE, CURRENT-SENSE AMPLIFIER MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 6 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. TYPICAL CHARACTERISTICS VCC = VRG1 = 12V, V5 = 5V, TJ = -40°C to +125°C, unless otherwise noted. Supply Current vs. Temperature IQ = ICC + IV5 Input Bias Current vs. Temperature 296 298 300 302 -50 -25 0 25 50 75 100 125 IQ (μA) TEMPERATURE (°C) 190 210 230 250 270 290 310 -50 -25 0 25 50 75 100 125 IRG1/IRG2 (nA) TEMPERATURE (°C) V5 UVLO Threshold vs. Temperature V5 Shutdown Supply Current vs. Temperature 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 -50 -25 0 25 50 75 100 125 V5 UVLO THRESHOLD (V) TEMPERATURE (°C) Rising Falling 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 -50 -25 0 25 50 75 100 125 ICC(SHDN) (A) TEMPERATURE (°C) Current-Sense Gain vs. Temperature 4.96 4.98 5.00 5.02 5.04 -50 -25 0 25 50 75 100 125 GM (A/A) TEMPERATURE (°C)

MPQ8112/MPQ8112A – 60V, HIGH-SIDE CURRENT-SENSE AMPLIFIER MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 7 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTIC (continued) VCC = 12V, VRG1 = 12V, V5 = 5V, TA = 25°C. RG1 = RG2 = 0Ω, and ROUT not used for the MPQ8112. RG1 = RG2 = 1kΩ, and ROUT = 10kΩ for the MPQ8112A. All unless otherwise noted. Total Output Error vs. VSENSE VCC = VCM Total Output Error vs. VSENSE VCM = 0V -1.5 -0.5 0.5 1.5 0 25 50 75 100 125 150 175 200 ERROR (% ) VSENSE (mV) Vcc=VCM=12V Vcc=VCM=48V Vcc=VCM=60V 0 25 50 75 100 125 150 175 200 ERROR (% ) VSENSE (mV) Vcc=12V Vcc=48V Vcc=60V Total Output Error vs. VSENSE VCC = VCM Total Output Error vs. VSENSE VCM = 0V -1.5 -0.5 0.5 1.5 0 25 50 75 100 125 150 175 200 ERROR (% ) VSENSE (mV) Ta=+25°C Ta=+155°C Ta=-55°C 0 25 50 75 100 125 150 175 200 ERROR (% ) VSENSE (mV) Ta=+25°C Ta=+155°C Ta=-55°C Gain vs. Frequency COUT = 5pF -10 0.1 1 10 100 1000 10000 GAIN (dB) FREQUENCY (kHz)

MPQ8112/MPQ8112A – 60V, HIGH-SIDE CURRENT-SENSE AMPLIFIER MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 8 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS VCC = 12V, VRG1 = 12V, V5 = 5V, TA = 25°C. RG1 = RG2 = 0Ω, and ROUT not used for the MPQ8112. RG1 = RG2 = 1kΩ, and ROUT = 10kΩ for the MPQ8112A. All unless otherwise noted. Transient Response VSENSE = 0mV to 100mV Transient Response VSENSE = 0mV to 200mV CH2: VOUT 2V/div. CH2: VOUT 2V/div. 1μs/div. 1μs/div. Transient Response VSENSE = 100mV to 200mV CH2: VOUT 2V/div. 1μs/div.

MPQ8112/MPQ8112A – 60V, HIGH-SIDE CURRENT-SENSE AMPLIFIER MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 10 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. OPERATION The MPQ8112 and MPQ8112A are high-side current-sense amplifiers with a wide 2.7V to 60V operating input vol tage (VCC) range. Their common mode input voltage (VCM) is based on VCC, with an operating range of 0 ≤ VCM ≤ VCC ≤ 60V. The MPQ8112 directly converts a differential input voltage to a voltage output with built -in internal common input resistors and a load resistor. The MPQ8112 has a 50V/V gain. The MPQ8112A converts the differential input voltage to a current output. This current is converted back to a voltage with an external load resistor. The MPQ8112A has an adjustable gain based on the external common input resistors and load resistor. Gain Setting The s ense c urrent (ISENSE) flows through the sense resistor (RSENSE), which generates a sense voltage (VSENSE). The high-precision sense amplifier bu ilt in to the MP Q8112/MPQ8112A monitors the differential voltage (VSENSE) and dynamically adjusts the gate voltage of the internal N-channel MOSFET (M1) to maintain a n equal passing current (IRG1). IRG1 is then multiplied by a gain factor (GM) in the outpu t stage current mirror , and finally flows through ROUT to generate VOUT. The MPQ8112/MPQ8112A’s output (VOUT) can be estimated with Equation (1): VOUT = ISENSE x RSENSE / RG1 x GM x ROUT (1) Where GM is 5A/A, and RG1 and ROUT are external resistors for the MPQ8112A. For the MPQ8112, RG1 is instead RIN_1, and ROUT is instead R IN_OUT. These values are 1kΩ and 10kΩ, respectively. The total gain (AV) can be calculated with Equation (2): AV = VOUT / VSENSE = ROUT / RG1 x GM (2) The MPQ8112A’s gain is adjustable by selecting different combinations of ROUT / RG1. The MPQ8112’s gain is fixed to 50V/V, and set by the internal resistors (RIN_1 and RIN_OUT). VCC Supply The VCC supply is the power source for the internal input stage amplifier and output stage current mirror circuitry. Use a bypass capacitor to ensure stability . Apply a 0.1 µF to 1µF low-ESR ceramic capacitor between V CC and GND , as close as possible. If the VCC power source is noisy, additional capacitance may be required. Common Input Voltage The MPQ8112 /MPQ8112A’s common input ranges between 0V and VCC. The minimum common input voltage is 0V. If the common input voltage is below 1.2V, an internal, dedicated compensation circuit is activated and drives the M1 drain voltage high enough to make the shunt current (IRG1) pass into the c urrent mirror. The compensation circuit can cause the output error to rise when VCM is below 1.2V ( for more information, see the Output Error vs. VSENSE curves in the Typical Performance Characteristics section on page 7). It is recommended to ensure that the common input vo ltage (VRG1) does not exceed VCC since VRG1 is the positive input of the amplifier , which is powered by VCC. V5 Supply V5 supplies the internal control block. It also supplies the compensation circuit when the common input voltage (VRG1 / VRG2) is low. V5 can act like a digital control pin that turns the current-sense amplifier on and off. If V5 is pulled below its 1.9V lower threshold voltage, the chip shuts down. If V5 is pulled above its 2V upper threshold voltage, the part turns on. In addition, if the common input voltage drops below 1.2V, the compensation circuit is activated and drives the M1 drain voltage high enough to make the shunt current (IRG1) pass into the current mirror. The compensation circuit consumes 0.1mA to 1mA of current when it starts to work . Therefore, V5 requ ires a low - impendence power source and a 10nF to 100nF ceramic bypass capacitor.

MPQ8112/MPQ8112A – 60V, HIGH-SIDE CURRENT-SENSE AMPLIFIER MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 12 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. PCB Layout Guidelines (10) Efficient PC B layout, especially for the sensing resistor and output resistor placement, affects measurement accuracy . For the best results, refer to Figure 6 and follow the guidelines below: 1. To minimize any resistance in series with sensing resistor trace, connect the RG1 and RG2 pins as close as possible to the sensing resistor. 2. Connect the bypass capacitors close to the device pins to decouple the power supply noise. Top Layer Bottom Layer Figure 6: Recommended PCB Layout Note: 10) The recommended PCB layout is based on Figure 7.

MPQ8112/MPQ8112A – 60V, HIGH-SIDE CURRENT-SENSE AMPLIFIER MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 14 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. TYPICAL APPLICATION CIRCUITS (continued) Vcc RG1 RG2 OUT GND V5 MPQ8112A RSENSE ISENSE To Load 2.7V to 60V VOUT RG1 1kΩ RG2 1kΩ ROUT 5kΩ 1μF 0.1μF VOUT = ISENSE x RSENSE / RG1 x GM x ROUT = 50 x ISENSE x RSENSE Figure 9: MPQ8112A (AV = 25V/V with VCM = VCC) Vcc RG1 RG2 OUT GND V5 MPQ8112A RSENSE ISENSE To Load 2.7V to 60V VOUT RG1 1kΩ RG2 1kΩ ROUT 5kΩ 1μF 0.1μF VOUT = ISENSE x RSENSE / RG1 x GM x ROUT = 50 x ISENSE x RSENSE

4 VOUT

Figure 10: MPQ8112A (AV = 25V/V with Buffer to Limit VOUT_MAX < V5)

MPQ8112/MPQ8112A – 60V, HIGH-SIDE CURRENT-SENSE AMPLIFIER MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 15 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved.

PACKAGE INFORMATION

NOTE: 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION, OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.10 MILLIMETERS MAX. 5) DRAWING CONFORMS TO JEDEC MO-193, VARIATION AB. 6) DRAWING IS NOT TO SCALE. 7) PIN 1 IS THE LOWER-LEFT PIN WHEN READING THE TOP MARK FROM LEFT TO RIGHT (SEE EXAMPLE TOP MARK). TOP VIEW RECOMMENDED LAND PATTERN SEATING PLANE SIDE VIEW DETAIL "A" SEE DETAIL ''A'' IAAAA PIN 1 ID See note 7 EXAMPLE TOP MARK

MPQ8112/MPQ8112A – 60V, HIGH-SIDE CURRENT-SENSE AMPLIFIER MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 16 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. CARRIER INFORMATION Pin1 1 1 1 1 ABCDABCDABCDABCD Feed Direction Part Number Package AEC1–Z TSOT23-6L 3000 N/A N/A 7in 8mm 4mm MPQ8112AGJ- AEC1–Z

MPQ8112, MPQ8112A60V, HIGH-SIDE, CURRENT-SENSE AMPLIFIER Notice: The information in this document is subject to change without notice. Users should warrant and guarantee that third - party Intellectual Property rights are not infringed upon when integr ating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MPQ8112/MPQ8112A Rev. 1.0 www.MonolithicPower.com 17 7/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved.

Revision History

Revision # Revision Date Description Pages Updated 1.0 7/7/2020 Initial Release -