MIC4826YMM

MIC4826 Low Input Voltage, 160 VPP Output Voltage, EL Driver Features General Description • • • • The MIC4826 is a high output voltage, DC to AC converter, designed for driving Electroluminescent (EL) lamps. The device operates from an input voltage range of 1.8V to 5.5V, making it suitable for 1-cell Li Ion and 2- or 3-cell alkaline, NiCad, and NiMH battery applications. The MIC4826 converts a low voltage DC input to a 160 VPP AC output signal that drives the EL lamp. 1.8V to 5.5V DC Input Voltage 160 VPP Regulated AC Output Waveform Independently Adjustable EL Lamp Frequency Independently Adjustable Boost Converter Frequency • 0.1 µA Shutdown Current Applications • • • • • • • LCD Panel Backlight Cellular Phones PDAs Pagers Calculators Remote Controls Portable Phones The MIC4826 has two stages: a boost stage, and an H-bridge lamp driver stage. The boost stage steps the input voltage up to +80V. The H-bridge stage then alternately switches the +80V output to each terminal of the EL lamp, thus creating a 160 VPP AC signal to drive the EL lamp and generate light. The MIC4826 features separate oscillators for the boost and H-bridge stages. External resistors independently set the operating frequency of each stage. This flexibility allows the EL lamp circuit to be optimized for maximum efficiency and brightness. The MIC4826 uses a single inductor and a minimum number of external components, making it ideal for portable, space-sensitive applications. The MIC4826 is available in an 8-lead MSOP package with an ambient temperature range of –40°C to +85°C. Package Type MIC4826 8-Pin MSOP (MM)  2019 -2022 Microchip Technology Inc. VDD 1 8 VA RSW 2 7 VB REL 3 6 CS GND 4 5 SW DS20006134B-page 1 MIC4826 Typical Application Circuit L1 220PH VIN CIN 10PF D1 BAV19WS COUT 0.01PF/100V MIC4826 1 VDD SW 5 442k 2 RSW CS 6 2M 3 REL VA 8 4 GND VB 7 2in2 EL LAMP Functional Block Diagram L1 220mH VIN 1 CIN D1 VDD 5 RSW SW 2 RWS Switch Oscillator COUT 6 CS Q1 8 REL VA Q2 EL Oscillator VREF EL LAMP Q3 7 VB 3 Q4 REL 4 DS20006134B-page 2 GND  2019 -2022 Microchip Technology Inc. MIC4826 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † Supply Voltage (VDD) ................................................................................................................................... –0.5V to +6V Output Voltage (VCS) ............................................................................................................................... –0.5V to +100V Frequency Control Voltage (VRSW, VREL) ....................................................................................... –0.5V to (VDD +0.3V) Power Dissipation @ TA = 85°C ..........................................................................................................................200 mV Storage Temperature (TS)...................................................................................................................... –65°C to +150°C ESD Rating .......................................................................................................................................................... (Note 1) Operating Ratings ‡ Supply Voltage (VDD) ................................................................................................................................ +1.8V to +5.5V Lamp Drive Frequency (fEL).................................................................................................................. 60 Hz to 1000 Hz Switching Transistor Frequency (fSW) ....................................................................................................8 kHz to 200 kHz Ambient Temperature............................................................................................................................... –40°C to +85°C Package Thermal Resistance (R(JA), 8-Pin MSOP) ..........................................................................................206°C/W † Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended periods may affect device reliability. Specifications are for packaged product only. ‡ Notice: The device is not guaranteed to function outside its operating ratings. Note 1: Devices are ESD sensitive. Handling precautions are recommended. ELECTRICAL CHARACTERISTICS Electrical Characteristics: VIN = VDD = 3.0V, RSW = 560 kΩ, REL = 1.0 MΩ.TA = 25°C unless otherwise noted. Bold values indicate –40°C ≤ TA ≤ +85°C. Parameter Symbol Min. Typ. Max. On-Resistance of Switching Transistor RDS(ON) — 3.8 7.0 Output Voltage Regulation Output Peak-to-Peak Voltage VCS VA-VB Units Conditions Ω ISW = 100 mA, VCS = 75V 75 80 85 V 73 87 VDD = 1.8V to 5.5V — V — 150 160 170 V 146 174 VDD = 1.8V to 5.5V — V — Input Low Voltage (Turn Off) VEN-L — — 0.5 V VDD = 1.8V to 5.5V Input High Voltage (Turn On) VEN-H VDD–0.5 — — V VDD = 1.8V to 5.5V Shutdown Current (Note 2) ISD — µA RSW = LOW; REL = LOW VDD = 5.5V Input Supply Current IVDD Boosted Supply Current Input Current Including Inductor Current 0.01 0.1 — 0.5 — 21 75 µA RSW = HIGH; REL = HIGH VCS = 75V; VA, VB OPEN ICS — 200 400 µA RSW = HIGH; REL = HIGH VCS = 75V; VA, VB OPEN IIN — 28 — mA VIN = VDD = 1.8V. See (Figure 1-1) VA - VB Output Drive Frequency fEL 285 360 435 Hz — Switching Transistor Frequency fSW 53 66 79 kHz — Switching Transistor Duty Cycle D — 90 — % — Note 1: 2: Specification for packaged product only. Shutdown current is defined as the sum of current going into pin 1, 5, and 6 when the device is disabled.  2019 -2022 Microchip Technology Inc. DS20006134B-page 3 MIC4826 TEMPERATURE SPECIFICATIONS (Note 1) Parameters Sym. Min. Typ. Max. Units Conditions Storage Temperature Range TS –65 — +150 °C — Ambient Temperature TA –40 — +85 °C — JA — 206 — °C/W — Temperature Ranges Package Thermal Resistances Thermal Resistance 8-Pin MSOP Note 1: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Test Circuit L1 220PH VIN 442k 2M DS20006134B-page 4 COUT 0.01PF/100V MIC4826 CIN 10PF FIGURE 1-1: D1 BAV19WS 1 VDD SW 5 2 RSW CS 6 3 REL VA 8 4 GND VB 7 100: 10nF MIC4826 Test Circuit.  2019 -2022 Microchip Technology Inc. MIC4826 2.0 Note: TYPICAL PERFORMANCE CURVES The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. FIGURE 2-1: Voltage. Total Input Current vs. Input FIGURE 2-4: Temperature. Output Voltage vs. FIGURE 2-2: Temperature. Total Input Current vs. FIGURE 2-5: Voltage. CS Voltage vs. Input FIGURE 2-3: Voltage. Output Voltage vs. Input FIGURE 2-6: Temperature. CS Voltage vs.  2019 -2022 Microchip Technology Inc. DS20006134B-page 5 MIC4826 FIGURE 2-7: Voltage. Switch Resistance vs. Input FIGURE 2-10: Input Voltage. Switching Frequency vs. FIGURE 2-8: Switch Resistor. Switching Frequency vs. FIGURE 2-11: Voltage. EL Frequency vs. Input FIGURE 2-9: Resistor. EL Frequency vs. EL FIGURE 2-12: Temperature. Switching Frequency vs. DS20006134B-page 6  2019 -2022 Microchip Technology Inc. MIC4826 FIGURE 2-13: Temperature. EL Frequency vs. FIGURE 2-14: Size. Output Voltage vs. Lamp FIGURE 2-15: Size. Total Input Current vs. Lamp  2019 -2022 Microchip Technology Inc. DS20006134B-page 7 MIC4826 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE Pin Number Pin Name 1 VDD Supply (Input): 1.8V to 5.5V for internal circuitry. 2 RSW Switch Resistor (External Component): Set switch frequency of the internal power MOSFET by connecting an external resistor to VDD. Connecting the external resistor to GND disables the switch oscillator and shutdown the device. 3 REL EL Resistor (External Component): Set EL frequency of the internal H-bridge driver by connecting an external resistor to VDD. Connecting the external resistor to GND disables the EL oscillator. 4 GND Ground return. 5 SW Switch Node (Input): Internal high voltage power MOSFET drain. 6 CS Regulated Boost Output (External Component): Connect to the output capacitor of the boost regulator and connect to the cathode of the diode. 7 VB EL Output: Connect to one end of the EL lamp. Polarity is not important. 8 VA EL Output: Connect to the other end of the EL lamp. Polarity is not important. DS20006134B-page 8 Description  2019 -2022 Microchip Technology Inc. MIC4826 4.1 for Overview The MIC4826 is a high voltage EL driver with an AC output voltage of 160V peak-to-peak capable of driving EL lamps up to 6 in2. Input supply current for the MIC4826 is typically 21 µA with a typical shutdown current of 10 nA. The high voltage EL driver has two internal oscillators to control the switching MOSFET and the H-bridge driver. Both of the internal oscillators’ frequencies can be individually programmed through the external resistors to maximize the efficiency and the brightness of the lamps. 4.2 Regulation Referring to Figure 4-1, initially power is applied to VDD. The internal feedback voltage is less than the reference voltage causing the internal comparator to go low which enables the switching MOSFET’s oscillator. When the switching MOSFET turns on, current flows through the inductor and into the switch. The switching MOSFET will typically turn on for 90% of the switching frequency. During the on time, energy is stored in the inductor. When the switching MOSFET turns off, current flowing into the inductor forces the voltage across the inductor to reverse polarity. The voltage across the inductor rises until the external diode conducts and clamps the voltage at VOUT+VD1. The energy in the inductor is then discharged into the COUT capacitor. The internal comparator continues to turn the switching MOSFET on and off until the internal feedback voltage is above the reference voltage. Once the internal feedback voltage is above the reference voltage, the internal comparator turns off the switching MOSFET’s oscillator. When the EL oscillator is enabled, VA and VB switch in opposite states to achieve a 160V peak-to-peak AC output signal. The external resistor that connects to the REL pin determines the EL frequency. VIN = 3.0V L = 220mH COUT = 0.01mF Lamp = 2in2 RSW = 332k REL = 3.32M VB (50V/div) See Section 5.0, Application Information component selection and pre-designed circuits. VA (50V/div) FUNCTIONAL DESCRIPTION VA – VB (50V/div) 4.0 TIME (2ms/div) FIGURE 4-1: Waveform. 4.3 108 Hz Typical Output Switching Frequency The switching frequency of the converter is controlled via an external resistor between RSW pin and VDD pin of the device. The switching frequency increases as the resistor value decreases. For resistor value selections, see Figure 2-8 or use equation Equation 4-1. The switching frequency range is 8 kHz to 200 kHz, with an accuracy of ±20%. EQUATION 4-1: 36 f SW  kHz  = -----------------------R SW  M  4.4 EL Frequency The EL lamp frequency is controlled via an external resistor connected between REL pin and VDD pin of the device. As the lamp frequency increases, the resistor value decreases. For resistor value selections, see Figure 2-9 or use equation Equation 4-2. The EL frequency range is 60 Hz to 1000 Hz, with an accuracy of ±20%. EQUATION 4-2: 360 f EL  Hz  = -----------------------R EL  M   2019 -2022 Microchip Technology Inc. DS20006134B-page 9 VA – VB (50V/div) VB (50V/div) VA (50V/div) MIC4826 TIME (2ms/div) FIGURE 4-2: 180 Hz Output Waveform. VA (50V/div) In general, as the EL lamp frequency increases, the amount of current drawn from the battery will increase. The color of the EL lamp and the intensity are dependent upon its frequency. VA – VB (50V/div) VB (50V/div) VIN = 3.0V L = 220mH COUT = 0.01mF Lamp = 2in2 RSW = 562k REL = 1M TIME (2ms/div) FIGURE 4-3: 4.5 360 Hz Output Waveform. Enable Function The enable function of the MIC4826 is implemented by switching the RSW and REL resistor between ground and VDD. When RSW and REL are connected to ground, the switch and the EL oscillators are disabled; therefore the EL driver becomes disabled. When these resistors connect to VDD, both oscillators will function and the EL driver is enabled. DS20006134B-page 10  2019 -2022 Microchip Technology Inc. MIC4826 Inductor In general, smaller value inductors, which can handle more current, are more suitable to drive larger size lamps. As the inductor value decreases, the switching frequency (controlled by RSW) should be increased to avoid saturation or the input voltage should be increased. Typically, inductor values ranging from 220 µH to 560 µH can be used. Murata offers the LQH3C series up to 560 µH and LQH4C series up to 470 µH, with low DC resistance. A 220 µH Murata (LQH4C221K04) inductor is recommended for driving a lamp size of 3 square inches. It has a maximum DC resistance of 4.0Ω. 5.2 Diode The diode must have a high reverse voltage (100V) since the output voltage at the CS pin can reach up to 100V. A fast switching diode with lower forward voltage and higher reverse voltage (100V), such as BAV19WS, can be used to enhance efficiency. 5.3 Output Capacitor Low ESR capacitors should be used at the regulated boost output (CS pin) of the MIC4826 to minimize the switching output ripple voltage. Selection of the capacitor value will depend upon the peak inductor current, inductor size, and the load. MuRata offers the GRM40 series with up to 0.015 µF at 100V, with a X7R temperature coefficient in 0805 surface mount package. Typically, values ranging from 0.01 µF to 0.1 µF at 100V can be used for the regulated boost output capacitor.  2019 -2022 Microchip Technology Inc. Pre-Designed Application Circuits L1 D1 220PH Vishay Telefunken Murata BAV19WS LQH4C221K04 Li-Ion Battery VIN 3.0V to 4.2V C2 10PF/6.3V Murata GRM42-6X5R106K6.3 COUT 0.01PF/100V GRM40X7R103K MIC4826 C1 0.22PF/10V Murata GRM39X7R 224K10 R2 3.32M R1 322k 1 VDD SW 5 2 RSW CS 6 3 REL VB 7 4 GND VA 8 3in2 LAMP VIN IIN VA-VB FEL Lamp Size 3.3V 20 mA 160VPP 100 Hz 3in2 FIGURE 5-1: Lamp. 100 Hz EL Driver for 3in2 VA (50V/div) 5.1 5.4 VB (50V/div) APPLICATION INFORMATION VA – VB (50V/div) 5.0 FIGURE 5-2: Typical Characteristics for 100 Hz EL Driver for 3in2 Lamp. DS20006134B-page 11 MIC4826 L1 220mH Murata LQH4C221K04 VIN 2.5V to 5.5V C2 10mF/6.3V Murata GRM42-6X5R106K6.3 D1 Diodes BAV20WS COUT 0.1mF/100V GRM42-2X7R104K100 MIC4826 R2 3.32M R1 332k 1 VDD SW 5 2 RSW CS 6 3 REL VB 7 4 GND VA 8 L1 560mH Murata LQ32CN561K21 VIN 3.3V to 5.5V C2 10mF/6.3V Murata GRM42-6X5R106K6.3 COUT 0.01mF/100V GRM40X7R103K100 MIC4826 R2 3.32M R1 332k 1 VDD SW 5 2 RSW CS 6 3 REL VB 7 4 GND VA 8 EL LAMP LSI X533-13 EL LAMP LSI X533-13 VIN IIN VA-VB FEL Lamp Size 3.3V 14 mA 160VPP 100 Hz 2in2 VIN IIN VA-VB FEL Lamp Size 3.3V 13.2 mA 160VPP 100 Hz 2in2 FIGURE 5-5: 560 µF. EL Driver for 2in2 Lamp with VA (50V/div) 100 Hz EL Driver for 2in2 VA – VB (50V/div) VA – VB (50V/div) VB (50V/div) VB (50V/div) VA (50V/div) FIGURE 5-3: Lamp. D1 Diodes BAV20WS TIME (2ms/div) TIME (2ms/div) FIGURE 5-4: Typical Characteristics for EL Driver for 2in2 Lamp with CS = 0.1 µF. DS20006134B-page 12 FIGURE 5-6: Typical Characteristics for EL Driver for 2in2 Lamp with 560 µH Inductor.  2019 -2022 Microchip Technology Inc. MIC4826 L1 220mH Murata LQH4C221K04 VIN 1.5V C2 10mF/6.3V Murata GRM42-6X5R106K6.3 VDD 1.8V to 5.5V R1 C1 0.01mF/50V Murata GRM40-X7R103K50 442k R2 3.32M D1 Diodes BAV20WS COUT 0.01mF/100V MIC4826 1 VDD SW 5 2 RSW CS 6 3 REL VB 7 4 GND VA 8 GRM40X7R103K100 EL LAMP VIN IIN VDD IDD VA-VB FEL Lamp Size 1.5V 22 mA 3.0V 36 µA 160VPP 100 Hz 1.6in2 V A – VB (50V/div) VB (50V/div) VA (50V/div) FIGURE 5-7: Typical for Split Power Supplies Applications. TIME (2ms/div) FIGURE 5-8: Typical Characteristics for Split Power Supplies Applications.  2019 -2022 Microchip Technology Inc. DS20006134B-page 13 MIC4826 6.0 PACKAGING INFORMATION 6.1 Package Marking Information 8-Lead MSOP* (front) XXXX XXX 8-Lead MSOP* (back) WNNN Legend: XX...X Y YY WW NNN e3 * Example 4826 YMM Example 9722 Product code or customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week ‘01’) Alphanumeric traceability code Pb-free JEDEC® designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package. ●, ▲, ▼ Pin one index is identified by a dot, delta up, or delta down (triangle mark). Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. Package may or may not include the corporate logo. Underbar (_) and/or Overbar (‾) symbol may not be to scale. Note: If the full seven-character YYWWNNN code cannot fit on the package, the following truncated codes are used based on the available marking space: 6 Characters = YWWNNN; 5 Characters = WWNNN; 4 Characters = WNNN; 3 Characters = NNN; 2 Characters = NN; 1 Character = N DS20006134B-page 14  2019 -2022 Microchip Technology Inc. MIC4826 8-Lead MSOP Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging.  2019 -2022 Microchip Technology Inc. DS20006134B-page 15 MIC4826 NOTES: DS20006134B-page 16  2019 -2022 Microchip Technology Inc. MIC4826 APPENDIX A: REVISION HISTORY Revision A (January 2019) • Converted Micrel document MIC4826 to Microchip data sheet DS20006134B. • Minor text changes throughout. Revision B (February 2022) • Corrected package marking drawing in Section 6.1, Package Marking Information section.  2019 -2022 Microchip Technology Inc. DS20006134B-page 17 MIC4826 NOTES: DS20006134B-page 18  2019 -2022 Microchip Technology Inc. MIC4826 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office. PART NO. X XX –XX Device Junction Temperature Range Package Media Type Device: MIC4826: Low Input Voltage, 160 VPP Output Voltage, EL Driver Junction Temperature Range: Y Package: MM = 8-Lead MSOP Media Type: Blank = TR = 100/Tube 2,500/Reel = Examples: a) MIC4826YMM: Low Input Voltage, 160 VPP Output Voltage, EL Driver, –40°C to +85°C Temperature Range, 8-Lead MSOP Package, 100/Tube b) MIC4826YMM-TR: Low Input Voltage, 160 VPP Output Voltage, EL Driver, –40°C to +85°C Temperature Range, 8-Lead MSOP Package, 2,500/Reel –40°C to +85°C  2019 -2022 Microchip Technology Inc. Note 1: Tape and Reel identifier only appears in the catalog part number description. This identifier is used for ordering purposes and is not printed on the device package. Check with your Microchip Sales Office for package availability with the Tape and Reel option. DS20006134B-page 19 MIC4826 NOTES: DS20006134B-page 20  2019 -2022 Microchip Technology Inc. Note the following details of the code protection feature on Microchip products: • Microchip products meet the specifications contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is secure when used in the intended manner, within operating specifications, and under normal conditions. • Microchip values and aggressively protects its intellectual property rights. Attempts to breach the code protection features of Microchip product is strictly prohibited and may violate the Digital Millennium Copyright Act. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of its code. 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Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, Augmented Switching, BlueSky, BodyCom, CodeGuard, CryptoAuthentication, CryptoAutomotive, CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, Espresso T1S, EtherGREEN, GridTime, IdealBridge, In-Circuit Serial Programming, ICSP, INICnet, Intelligent Paralleling, Inter-Chip Connectivity, JitterBlocker, Knob-on-Display, maxCrypto, maxView, memBrain, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, NVM Express, NVMe, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE, Ripple Blocker, RTAX, RTG4, SAM-ICE, Serial Quad I/O, simpleMAP, SimpliPHY, SmartBuffer, SmartHLS, SMART-I.S., storClad, SQI, SuperSwitcher, SuperSwitcher II, Switchtec, SynchroPHY, Total Endurance, TSHARC, USBCheck, VariSense, VectorBlox, VeriPHY, ViewSpan, WiperLock, XpressConnect, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. 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