MPQ18913

MPQ18913 MPS | Alldatasheet

Document overview

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Technical content

30V, 0.3A High Frequency Transformer Driver for Automotive, AEC-Q100 PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 1 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved.

DESCRIPTION

The MPQ18913 is a high frequency half bridge transformer driver, which is the ideal solution for the primary side switcher used in isolated power supplies. It supports a wide input voltage range of 5V-30V, and integrates two switching FETs which take up to 300 mA average input current. The device features wide adjustable switching frequency range, which is particularly useful in resonant topologies such as LLC converter. It also comes with input OVP, OCP, and fault indicator. Soft start up is built in to control the inrush current. The MPQ18913 is available in QFN -10 (2mmx2.5mm) package with wettable flank.

FEATURES

 Half Bridge Transformer Driver for Isolated LLC Resonant Converter  Adjustable Switching Frequency Range up to 5 MHz  Supports up to 6W  QFN-10 (2mmx2.5mm) package with wettable flank  Available in AEC-Q100 Grade

APPLICATIONS

 Isolated Power Supply  High Frequency DC-DC Converter  General Purpose Transformer Driver 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. TYPICAL APPLICATION TX1 +20V 2.2μF 2.2μF 4.7μF 4.7μF -4V FLT VCC VIN 24V NC SW EN/ SYNC BST GND 4.7μF Cr FREQ 0.47μF 2.2μF Lr 4.7k Lm

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 2 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. SELECTION GUIDE Part Number Soft start time Hiccup time MPQ18913GRPE-AEC1-Z 1ms 12ms MPQ18913GRPE-A-AEC1-Z 20ms 120ms

ORDERING INFORMATION

Part Number* Package Top Marking MSL Rating MPQ18913GRPE-AEC1 QFN-10 (2mmx2.5mm) See Below 1 MPQ18913GRPE-A-AEC1 EVQ-18913-D-00A Evaluation kit * For Tape & Reel, add suffix –Z (e.g. MPQ18913GRPE-AEC1-Z). TOP MARKING MPQ18913GRPE-AEC1 ML: Product code of MPQ18913GRPE-AEC1 Y: Year code LLL: Lot number TOP MARKING MPQ18913GRPE-A-AEC1 MM: Product code of MPQ18913GRPE-A-AEC1-Z Y: Year code LLL: Lot number PACKAGE REFERENCE TOP VIEW FREQ NC BST SW GND VCC 3VIN 9FLT AGND Package Diagram QFN-10 (2mmx2.5mm) package with wettable flank

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 3 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. PIN FUNCTIONS Package Pin # Name Description 1 FLT Fault Indicator. FLT pin is an open-drain output. 2 EN/SYNC Enable/External Clock. Pull high to enable MPQ18913, pull low to disable MPQ18913. Apply external clock to sync switching frequency. 3 VIN Input Voltage. Bypass VIN to GND with a 1µF ceramic capacitor as close as possible to the IC. 4 GND Ground. 5 AGND Analog Ground. Connect to power GND through single point connection. 6 VCC Bias Supply. Decouple with 1µF or larger ceramic capacitor referred to GND. Place the capacitor as close as possible. 7 SW Switch Node. 8 BST Drive Voltage for HS FET. Connect a ceramic capacitor from this pin to SW. 9 NC Please float NC pin. For internal test use only. 10 FREQ Switching Frequency set pin. Connect a resistor from FREQ to GND. Place the resistor as close as possible. ABSOLUTE MAXIMUM RATINGS (1) Continuous Power Dissipation (TA = +25° C) (2) ESD Rating Recommended Operating Conditions (3) Thermal Resistance 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 T J (MAX), the junction -to- ambient thermal resistance θ JA, 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. Exceedin g the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on EVQ18913-D-00A, 6-layer PCB 5) Measured on JESD51-7, 4-layer PCB. 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.

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 4 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

VIN = 24V, TJ = -40° C to 150°C, typical values are at TJ = +25° C, unless otherwise noted. Parameter Symbol Condition Min Typ Max Units Power Supply Transformer Driver VCC Regulator VCC ICC=0-20mA, VEN=1.5V 4.55 4.7 4.85 V Vcc UVLO Thresholds VCCUV_R VCC rising 4.1 4.25 4.4 V VCCUV_F VCC falling 3.95 4.1 4.25 V VCCUV_HYS Hysteresis 150 mV Vin UVLO Thresholds VINUV_R VIN rising 4.35 4.65 4.9 V VINUV_F VIN falling 4 4.25 4.5 V VINUV_HYS Hysteresis 400 mV Shut Down Current ISD VEN=0V 4 12 µA Supply Current IQ VEN=1.5V, Fsw=1MHz set by Resistor, SW floating 9.5 mA Input Over Voltage Protection Threshold VOVP_T Rising 31 33 35 V VOVP_F Falling 28.5 30.5 32.5 V Input OVP Hysteresis VOVP_H 2.5 V EN Turn on Threshold VEN_ON VEN rising 1.0 1.1 1.2 V EN Turn off Threshold VEN-OFF EN falling 0.8 0.9 1.0 V EN Hysteresis VEN-HYS 0.2 V EN Pull Down REN 2 MΩ EN/SYNC Turn Off Blanking(6) tEN_SD_BLK EN OFF to stop switching 6 µs SYNC Input High Threshold VSYNC_HI rising 1.7 V SYNC Input Low Threshold VSYNC_LO falling 0.9 V SYNC Input Hysteresis VSYNC_HYS 0.8 V HS FET Ron RON_HS IDS=0.1A 180 mΩ LS FET Ron RON_LS IDS=0.1A 180 mΩ Switch Leakage SWLKG VEN=0, VSW=24V, TJ=25° C 1 µA VEN=0, VSW=24V, TJ=-40° C to 150° C 6 µA Average SW capacitance CSW VEN=0, Charge SW from 0 to 24V 100 125 150 pF FLT Output Low Threshold VOL 0.2 0.3 V

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 5 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. ELECTRICAL CHARACTERISTICS (continued) VIN = 24V, TJ = -40° C to 150°C, typical values are at TJ = +25° C, unless otherwise noted. Parameter Symbol Condition Min Typ Max Units Switching Frequency Setting fSW RFREQ=33kΩ -3% 3 +3% MHz RFREQ=100kΩ -3% 1 +3% MHz Frequency Setting Resistor Range RFREQ 20 250 kΩ SYNC Frequency Range 0.4 5 MHz First Level OC Limit ILIM -15% 1.2 +15% A First Level OCP Blanking(6) tOCP MPQ18913 -20% 1 +20% ms MPQ18913-A -20% 20 +20% ms Short Circuit Protection Threshold ISC Fast off limit 6 A Hiccup Time(6) tHICCUP MPQ18913 -20% 12 +20% ms MPQ18913-A -20% 120 +20% Dead-time(6) tD -20% 25 +20% ns Soft-Start Time(6) tSS MPQ18913 1 ms MPQ18913-A 20 ms Thermal Shutdown TSD 170 °C Thermal Shutdown Hysteresis ∆TSD 20 °C Note: 6) Derived from bench characterization, not production tested.

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 6 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. TYPICAL CHARACTERISTICS Performance curves and waveforms are tested on the evaluation board. VIN = 24V, VOUT = 24V, TA = 25°C, unless otherwise noted. 0 100 200 300 EFFICIENCY (%) LOAD CURRENT (mA) Efficiency vs. Load Current VIN=21.6V VIN=24V VNI=26.4V 0 100 200 300 OUTPUT VOLTAGE (V) LOAD CURRENT (mA) Line&Load Regulation vs. Load Current VIN=21.6V VIN=24V VNI=26.4V

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 7 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS VIN = 24V, IOUT=0.25A, TA = 25° C, unless otherwise noted. Steady State IOUT = 0.25A Steady State IOUT = 0A CH2: SW 6V/div. CH4: IPRI 0.5A/div. CH2: SW 6V/div. CH4: IPRI 0.1A/div. 200ns/div. 200ns/div. Vin Turn On MPQ18913 Vin Turn On MPQ18913A CH1:VIN 10V/div. CH2: SW 10V/div. CH3: VOUT 10V/div. CH4: IPRI 2A/div. 2ms/div. 12.5ms/div. EN Turn On MPQ18913 EN Turn On MPQ18913A CH1:EN 5V/div. CH2: SW 10V/div. CH3: VOUT 10V/div. CH4: IPRI 2A/div. 2ms/div. 12.5ms/div.

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 8 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 24V, IOUT=0.25A, TA = 25° C, unless otherwise noted. Vin Turn Off EN Turn Off CH1:VIN 10V/div. CH2: SW 10V/div. CH3: VOUT 10V/div. CH4: IPRI 2A/div CH1:EN 5V/div. CH2: SW 10V/div. CH3: VOUT 10V/div. CH4: IPRI 2A/div. 5ms/div. 1ms/div. Output Short MPQ18913 Output Short Recovery MPQ18913 CH1:FLT 4V/div. CH2: SW 10V/div. CH3: VOUT 10V/div. CH4: IPRI 3A/div. CH1:FLT 4V/div. CH2: SW 10V/div. CH3: VOUT 10V/div. CH4: IPRI 3A/div. 1.5ms/div. 5ms/div.

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 9 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. FUNCTIONAL BLOCK DIAGRAM VIN GND SW BST VCC EN/SYNC FLT FREQ LDO VIN PWM Soft- Start OCP SCP OVP UVLO OTP Freq Set VCC Figure 1: Functional Block Diagram

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 11 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. Table 1: FLT Reporting Function Table(7) EN Vin Vcc FLT X P P H X UP UP L L P UP L L UP P(8) L H P UP(8) L H UP P(8) L Note: 7) L: Logic Low; H: Logic High; X: Irrelevant; P: Powered; UP: Unpowered, UVLO condition. 8) This operation can happen only when external Vcc bias is applied. It is not recommended to power Vcc when V in is unpowered, or pull EN high when Vin is powered but Vcc is unpowered.

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 12 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved.

APPLICATION INFORMATION

Selecting the Rectification Diodes Schottky diodes are recommended to minimize power losses and help achieve ZVS of MPQ18913, because Schottky diodes feature low forward voltage drop and fast recovery. The current rating of the diodes can be calculated with Equation (1): Ipk≈π×Iload (1) Selecting the Output Capacitor The output voltage ripple is determined by the value of capacitance and the gate charge of power device, e.g. SiC or IGBT. To maintain an acceptable voltage ripple , Vripple , the output capacitance for the two output voltage rails can be estimated with Equation (2): Cout, positive rail=Cout, negative rail≥ Qg Vripple (2) If the capacitance of each rail needs to be larger than 22uF, MPQ18913A should be selected instead of MPQ18913 due to it s longer soft start time. Selecting the Switching Frequency Higher switching frequency can reduce the size of transformer, but it will lead to larger transformer windings AC resistance, which limits the output power. The recommended switching frequency is as Equation (3): Fsw= { 0.4MHz-0.75MHz, Pout≤6W 0.75MHz-2MHz, Pout≤3W 1.5MHz-5MHz, Pout≤2W (3) To setup the switching frequency, the FREQ resistor can be calculated as RFREQ= 100kΩ Fsw(MHz) (4) Selecting the Magnetizing Inductance of the Transformer The design target of magnetizing inductance based on ZVS achievement can be calculated from equation (5). Lm= Dead Time 8×CSW×FSW = 25ns 8×0.17nF×Fsw (5) If the magnetizing inductance is larger than the target, it does not have enough magnetizing current to achieve full ZVS. With the low input voltage and small parasitic capacitance on the switcher, partial ZVS will not raise concerns in thermal or electrical stress . If the magnetizing inductance is smaller than the design target, it will lead to more magnetizing current than needed, which results in extra conduction loss. Given the small Rds,on and a reasonable ACR of transformer, the conduction loss will not raise thermal concerns as well. It is recommended that the magnetizing inductance be more than 10 times larger than leakage inductance, in order to decrease the output voltage’s sensitivity to the tolerance of inductance and resonant capacitance. Selecting the Resonant Capacitor The value of resonant capacitor can be calculated with equation (6): Cr= 1 4×π2×Lr×Fsw 2 (6) Where the Lr is the leakage inductance of the transformer, reflected to the primary side.

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 13 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. PCB LAYOUT GUIDELINES(9) Efficient PCB layout is critical for standard operation and EMI performance. For the best results, refer to Figure 4 and follow the guidelines below: 1. Place the input capacitor, Vcc capacitor and BST capacitor as close to the corresponding pins as possible 2. Place the FREQ resistor as close to the FREQ pin as possible. Use short and direct trace to connect the resistor to FREQ pin. The other terminal of FREQ resistor should be connected to AGND. 3. Connect AGND to power GND through single point connection. 4. Minimize the area of switch nodes on both primary side and secondary side to reduce EMI emission. 5. Place the input filter at the bottom layer to improve EMI performance. Note: 9) The recommended layout is based on the typical application circuit (see Figure 5). Top Layer Mid-Layer 1 Mid-Layer 2

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 14 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. Mid-Layer 3 Mid-Layer 4 Bottom Layer Figure 4: Recommended PCB Layout

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 15 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. TYPICAL APPLICATION CIRCUITS TX1 +20V 2.2uF R2 2.2uF 4.7uF 4.7uF -4V FLT VCC VIN 24V NC SW EN/ SYNC BST GND 4.7uF Cr FREQ 0.47uF 2.2uF 100k 22nF Lr 1.1uH BZX84- C3V6 BAT165A BAT165A 4.7k35V, X7R 35V, X7R 10V, X7R 25V, X7R 25V, X7R Figure 5: VIN=24V, VOUT=+20V/-4V, 6W LLC with Input Voltage Start Up

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ18913 Rev. 0.8 MonolithicPower.com 16 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved.

PACKAGE INFORMATION

QFN-10 (2mmx2.5mm) PACKAGE OUTLINE DRAWING FOR 10L FCQFN (2.0X2.5MM)-3 MF-PO-D-0556 revision 0.0 SIDE VIEW BOTTOM VIEW PIN 1 ID MARKING TOP VIEW PIN 1 ID INDEX AREA RECOMMENDED LAND PATTERN PIN 1 ID 0.15X45º TYP 0.15X45º SECTION A-A NOTE: 1) THE LEAD SIDE IS WETTABLE. 2) ALL DIMENSIONS ARE IN MILLIMETERS. 3) LEAD COPLANARITY SHALL BE 0.08 MILLIMETERS MAX. 4) JEDEC REFERENCE IS MO-220. 5) DRAWING IS NOT TO SCALE.

MPQ18913 – 30V, 0.3A High Frequency Transformer Driver PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third-party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MPQ18913 Rev. 0.8 MonolithicPower.com 17 12/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2021 MPS. All Rights Reserved. CARRIER INFORMATION Part Number Package Description Quantity/Reel Quantity/Tube Quantity/Tray Reel Diameter Carrier Tape Width Carrier Tape Pitch MPQ18913GRPE- AEC1 QFN-10 (2mmx2.5mm) 5000 N/A N/A 13 in. 12 mm 8 mm MPQ18913GRPE- A-AEC1 Pin1 1 1 1 1 ABCD ABCD ABCD ABCD Feed Direction