HV861

HV861 MICROCHIP | Alldatasheet

Document overview

• Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
• PDF pages: 17

Technical content

Features

• Adjustable Output Regulation for Dimming
• Lamp Fade-in/Fade-out Capability
• Low Audible Noise
• 180 VPP Output Voltage for Higher Brightness
• 1.5V Enable Input Logic High
• Single-cell Lithium Ion-compatible
• One Miniature Inductor to Power both Lamps
• Separately Adjustable Lamp and Converter Frequencies
• Split Supply Capability

Applications

• Dual Display Cellular Phones
• Keypad and LCD Backlighting
• Personal Digital Assistant (PDA)
• Handheld Wireless Communication Products
• Global Positioning Systems (GPS) General Description The HV861 is a low-noise dimmable high-voltage dual EL lamp driver designed for driving two electroluminescent (EL) lamps with a combined area of 5 in 2. The input supply voltage range is from 2.5V to 4.5V. Enable input logic high can go as low as 1.5V, which allows logic interface operating from typical 1.8V supplies. The device is designed to minimize audible noise emitted by the EL lamps. The device uses a single inductor and a minimum number of passive components. With the internal reference voltage, the regulated output voltage is at a nominal value of 90V. The EL lamps therefore see ±90V. The two EL lamps can be turned on and turned off using two CMOS logic inputs, EN1 and EN2. The driver is disabled when both EN1 and EN2 are at logic low. The HV861 has two internal oscillators, a switching MOSFET, and two high-voltage EL lamp driver H-bridges. Each driver has its own half-bridge common output, COM1 and COM2, which significantly minimizes the DC offset seen by the EL lamp. The frequency for the switching MOSFET is set by an external resistor connected between the RSW-Osc pin and the supply pin, VDD. The EL lamp driver frequency is set by an external resistor connected between the REL-Osc pin and the VDD pin. An external inductor is connected between the L X and V DD pins or V IN for split supply applications. Depending upon the EL lamp sizes, a 1 nF to 10 nF capacitor is connected between the C S and ground. As the switching MOSFET charges the external inductor and discharges it into the capacitor at CS, the voltage at CS starts to increase. Once the voltage at C S reaches a nominal value of 90V, the switching MOSFET is turned off to conserve power. EL lamp dimming can be accomplished by applying a PWM logic signal to the PWM pin. The EL lamp brightness will be inversely proportional to the PWM duty cycle. The HV861 can also slowly turn on or turn off the EL lamp, giving a fade on/off appearance. Package Type See Table 2-1 for pin information. 16-lead WQFN (Top view) 1 12 5 6 7 8 13 141516 VREF VREG VOUT PWM EL1 COM1 COM2 EL2 REL-Osc RSW-Osc VDD EN1 EN2 GND LX CS Low-Noise Dimmable Dual EL Lamp Driver Obsolete Device

DS20005911B-page 2  2023-2026 Microchip Technology Inc. and its subsidiaries Functional Block Diagram VCS VCS VCS EL1 COM1 EL2 COM2 Output Drivers VSENSE 1.26V VREF PWM Switch Oscillator 0 to 88% 2 x EL Freq. 1 x EL Freq. CSLXVDD EN1 EN2 RSW-Osc VREG VOUT GND REL-Osc PWM VREF EL1 Enable EL2 Enable 60pF C +

 2023-2026 Microchip Technology Inc. and its subsidiaries DS20005911B-page 3 HV861 Typical Application Circuit 100μH 3.3MΩ 2.0MΩ 825kΩ VDD = 3.0V 0.1μF 2.2μF Input Logic Control: ON = 1.5 to VDD OFF = 0 to 0.2V GND EN1 VDD 1415 16 13 PWMVREF EN2 RSW-Osc REL-Osc VREG VOUT LX CS EL1 COM1 EL2 COM2 HV861 EL1 EL2 3.3nF 100V NPO 1N41484.7μF VIN = 3.2 to 4.2V

DS20005911B-page 4  2023-2026 Microchip Technology Inc. and its subsidiaries

1.0 ELECTRICAL CHARACTERISTICS

Absolute Maximum Ratings( †) Power Dissipation: † 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 condi- tions 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. RECOMMENDED OPERATING CONDITIONS Parameter Sym. Min. Typ. Max. Unit Conditions Input Voltage VDD 2.5 — 4.5 V Switching Frequency fSW 40 — 200 KHz EL Lamp Frequency fEL 150 — 500 Hz EL Lamp Capacitance Load CLOAD 0 — 20 nF Operating Ambient Temperature TA –40 — +85 °C

ELECTRICAL CHARACTERISTICS

Electrical Specifications: Over recommended operating conditions unless otherwise specified. Parameter Sym. Min. Typ. Max. Unit Conditions On-resistance of Switching Transistor R DS(ON) — — 7 Ω I = 100 mA Maximum Output Regulation Voltage VCS 80 90 100 V V DD = 2.5V to 4.5V Output Regulation Voltage VCS — 78 — V VDD = 2.5V to 4.5V, VREG = 1.092V — 62 — V VDD = 2.5V to 4.5V, VREG = 0.862V — 45 — V VDD = 2.5V to 4.5V, VREG = 0.632V External Input Voltage Range VREG 0 — 1.40 V V DD = 2.5V to 4.5V VREF Output High Voltage VREFH 1.12 1.26 140 V V DD = 2.5V to 4.5V Quiescent VDD Supply Current IDDQ — — 150 nA EN = Low Average Sourcing Current from VREF Pin I REF(SOURCE) — 6 — µA V DD = 2.5V to 4.5V Average Sinking Current from VREF Pin I REF(SINK) — 6 — µA V DD = 2.5V to 4.5V Quiescent VDD Supply Current IDDQ — — 300 nA VDD = 2.5V, EN1 = EN2 = PWM = low — — 400 nA VDD = 3V, EN1 = EN2 = PWM = low — — 500 nA VDD = 4.5V, EN1 = EN2 = PWM = low Input Current going into the VDD Pin IDD — — 250 µA VDD = 2.5V to 4.5V, REL = 2 MΩ, RSW = 825 kΩ Input Current including Inductor Current I IN — 25 50 mA V IN = 3.2V See Figure 3-1. EL Lamp Frequency fEL 160 190 220 Hz R EL = 2 MΩ

 2023-2026 Microchip Technology Inc. and its subsidiaries DS20005911B-page 5 HV861 Switching Transistor Frequency fSW 84 100 116 kHz R SW = 825 kΩ Switching Transistor Duty Cycle D — 88 — % Input PWM Frequency PWM 10 — 100 kHz LOGIC INPUTS Enable Input Logic High Voltage VIH 1.5 — V DD V V DD = 2.5V to 4.5V Enable Input Logic Low Voltage VIL 0 — 0.2 V V DD = 2.5V to 4.5V Enable Input Logic High Current IIH — — 1 µA V IH = VDD = 2.5V to 4.5V Enable Input Logic Low Current IIL — — –1 µA VIL = 0V, VDD = 2.5V to 4.5V Enable Input Capacitance CIN — — 15 pF TEMPERATURE SPECIFICATIONS Parameter Sym. Min. Typ. Max. Unit Conditions TEMPERATURE RANGE Operating Ambient Temperature Range T A –40 — +85 °C Storage Temperature Range TS –65 — +150 °C PACKAGE THERMAL RESISTANCE 16-lead WQFN JA — 33 — °C/W ELECTRICAL CHARACTERISTICS (CONTINUED) Electrical Specifications: Over recommended operating conditions unless otherwise specified. Parameter Sym. Min. Typ. Max. Unit Conditions

DS20005911B-page 6  2023-2026 Microchip Technology Inc. and its subsidiaries

2.0 PIN DESCRIPTION

The details on the pins of HV861 are listed in Table 2-1. Refer to Package Type for the location of pins. TABLE 2-1: PIN FUNCTION TABLE Pin Number Pin Name Description

1 REL-Osc

External resistor from REL-Osc to VDD sets the EL frequency. The EL frequency is inversely proportional to the external REL resistor value. Reducing the resistor value by a factor of two results in an increase in the EL frequency by two.

2 RSW-Osc

External resistor from RSW-Osc to VDD sets the switch converter frequency. The switch converter frequency is inversely proportional to the external RSW resistor value. Reducing the resistor value by a factor of two results in an increase in the switch converter frequency by two.

3 VDD Low-voltage input supply pin

4 EN1 Enable input signal for EL Lamp 1. CMOS logic input pin. (Refer to Table 3-2.) 5 EN2 Enable input signal for EL Lamp 2. CMOS logic input pin. (Refer to Table 3-2.)

6 GND Device ground

Drain of internal switching MOSFET. Connection for an external inductor. The inductor LX is used to boost the low-input voltage by inductive flyback. When the internal switch is on, the inductor is being charged. When the internal switch is off, the charge stored in the inductor is transferred to the high-voltage capacitor, CS. The energy stored in the capacitor is connected to the internal H-bridge, and there- fore to the EL lamp. 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 of the inductor (controlled by RSW) should be increased to avoid saturation. 8 CS Connect a 100V capacitor between this pin and ground. This capacitor stores the energy transferred from the inductor.

9 EL2 EL Lamp 2 connection

10 COM2 Common connection for EL2 Lamp

11 COM1 Common connection for EL1 Lamp

12 EL1 EL Lamp 1 connection

13 PWM

PWM pulse input for EL lamp dimming. The duty cycle of the PWM signal is inversely proportional to the output voltage. If PWM dimming is not desired, then the PWM pin should be tied to ground.

14 VOUT Switched internal reference voltage

15 VREG

Input voltage to set VCS regulation voltage. This pin allows an external voltage source to control the VCS amplitude. EL lamp dimming can be accomplished by varying the input voltage to VREG. The VCS voltage is approximately 71 times the voltage seen on VREG. External resistor connected between VREG and VOUT pins controls the VCS charging rate. The charging rate is inversely proportional to the resistor value. fEL 2M 190Hz REL fSW 825k 100kHz RSW

 2023-2026 Microchip Technology Inc. and its subsidiaries DS20005911B-page 7 HV861

16 VREF

Internal reference voltage to set the regulation voltage. Connect an external capacitor, CREF, from VREF to ground to slowly brighten the lamp during power-up and dim down the lamp during power-down. The size of the capacitor determines the time taken to brighten up or dim down. If fade-in and fade-out are not required, this pin should be left floating. Fade-in/fade-out time = CREF x 210 x 103 seconds. TABLE 2-1: PIN FUNCTION TABLE (CONTINUED) Pin Number Pin Name Description

DS20005911B-page 8  2023-2026 Microchip Technology Inc. and its subsidiaries

3.0 APPLICATION INFORMATION

FIGURE 3-1: Test Circuit. TABLE 3-1: TYPICAL PERFORMANCE (EL1 LAMP SIZE = EL2 LAMP SIZE = 3.6 IN 2) EN1 EN2 EL1 EL2 COM1 COM2 IC 0 0 High Z High Z High Z High Z OFF 0 1 High Z ON High Z ON ON 1 0 ON High Z ON High Z ON 1 1 ON ON ON ON ON 100μH 3.3MΩ 2.0MΩ 825kΩ VDD = 3.0V 0.1μF 2.2μF Input Logic Control: ON = 1.5 to VDD OFF = 0 to 0.2V GND EN1 VDD 1415 16 13 PWMVREF EN2 RSW-Osc REL-Osc VREG VOUT LX CS EL1 COM1 EL2 COM2 HV861 EL1 EL2 3.3nF 100V NPO 1N41484.7μF VIN = 3.2 to 4.2V TABLE 3-2: TRUTH FUNCTION TABLE VDD (V) VIN (V) Lamp IIN (mA) VCS (VPEAK) fEL (Hz) Lamp Brightness (cd/m2) EL1 EL2 3 4 EL1 ON 16.5 93 188 14 — EL2 ON 16.5 — 14 EL1 and EL2 ON 29.8 14 14

 2023-2026 Microchip Technology Inc. and its subsidiaries DS20005911B-page 9 HV861 FIGURE 3-2: Typical Waveform EL1, COM1 and Differential Waveform EL1 – COM1. FIGURE 3-3: Split Supply and Enable/Disable Configuration.

3.1 Split Supply Configuration

The HV861 can also be used for handheld devices operating from a battery where a regulated voltage is available. This is shown in Figure 3-3. The regulated voltage can be used to run the internal logic of the HV861. The amount of current necessary to run the internal logic is 250 µA (maximum value). Therefore, the regulated voltage could easily provide the current without being loaded down.

3.2 Enable/Disable Configuration

The EL1 and EL2 outputs can be enabled and disabled through a logic control signal on the EN1 and EN2 pins, respectively. When EN1 is high or low, Lamp 1 (EL1) will be on or off. When EN2 is high or low, Lamp 2 (EL2) will be on or off. The control signal can be from a microprocessor. EL1 EL1 - COM1 COM1 LX RREG REL RSW CDD CREF Input Logic Control: Input Logic Control: GND EN1 VDD 1415 16 13 PWMVREF EN2 RSW-Osc REL-Osc VREG VOUT LX CS EL1 COM1 EL2 COM2 HV861 EL1 EL2 CS D Battery Voltage = VIN Regulated Voltage = VDD CIN

DS20005911B-page 10  2023-2026 Microchip Technology Inc. and its subsidiaries

4.0 PACKAGING INFORMATION

4.1 Package Marking Information

Legend: XX...X Product Code or Customer-specific information Y Year code (last digit of calendar year) YY Year code (last 2 digits of calendar year) WW Week code (week of January 1 is week ‘01’) NNN Alphanumeric traceability code Pb-free JEDEC ® designator for Matte Tin (Sn) * This package is Pb-free. The Pb-free JEDEC designator ( ) can be found on the outer packaging for this package. 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 product code or customer-specific information. Package may or not include the corporate logo. 16-lead WQFN XXXXX YYWW NNN Example H861 2325 394

 2023-2026 Microchip Technology Inc. and its subsidiaries DS20005911B-page 11 HV861 A BA 0.15 C 0.15 C

0.10 C A B

0.05 C C SEATING PLANE TOP VIEW SIDE VIEW BOTTOM VIEW NOTE 1 0.10 C 0.08 C Microchip Technology Drawing C04-303A Sheet 1 of 2 D E (A3) 16X b e K L 16X For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging Note: 16-Lead Very, Very Thin Plastic Quad Flat, No Lead Package (3P) - 3x3 mm Body [WQFN]; Supertex Legacy Package K7 ș NOTE 1 N N (DATUM B) (DATUM A) See Detail A for Pullback Leads alternative © 2021 Microchip Technology Inc.

DS20005911B-page 12  2023-2026 Microchip Technology Inc. and its subsidiaries Microchip Technology Drawing C04-303A Sheet 2 of 2 REF: Reference Dimension, usually without tolerance, for information purposes only. BSC: Basic Dimension. Theoretically exact value shown without tolerances. Notes: Pin 1 visual index feature may vary, but must be located within the hatched area. Package is saw singulated Dimensioning and tolerancing per ASME Y14.5M 16-Lead Very, Very Thin Plastic Quad Flat, No Lead Package (3P) - 3x3 mm Body For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging Note: [WQFN]; Supertex Legacy Package K7 Number of Terminals Overall Height Terminal Width Overall Width Terminal Length Exposed Pad Width Terminal Thickness Pitch Standoff Units Dimension Limits A b e L E N

0.50 BSC

0.20 REF

0.20 0.18 0.70 0.00 0.25 0.30 0.75 0.02

3.00 BSC

0.45 0.30 0.80 0.05 MAX K- 0.20 -Terminal-to-Exposed-Pad Overall Length Exposed Pad Length D D2 1.50 1.65 1.80 1.50 1.65 1.80 ș -0.20 - Mold Angle 0° 7° 14° L DETAIL A Pullback L1 -- 0 . 1 5 © 2021 Microchip Technology Inc.

 2023-2026 Microchip Technology Inc. and its subsidiaries DS20005911B-page 13 HV861 RECOMMENDED LAND PATTERN Dimension Limits Units Optional Center Pad Width Contact Pad Spacing Optional Center Pad Length Contact Pitch 1.65 1.65 MILLIMETERS E MAX 2.90 Contact Pad Length (X16) Contact Pad Width (X16) 0.85 0.30 Microchip Technology Drawing C04-2303A NOM 16-Lead Very, Very Thin Plastic Quad Flat, No Lead Package (3P) - 3x3 mm Body SILK SCREEN E C1Contact Pad Spacing 2.90 Contact Pad to Center Pad (X16) G1 0.20 Thermal Via Diameter V Thermal Via Pitch EV 0.30 1.00 ØV EV EV BSC: Basic Dimension. Theoretically exact value shown without tolerances. Notes: Dimensioning and tolerancing per ASME Y14.5M For best soldering results, thermal vias, if used, should be filled or tented to avoid solder loss during reflow process For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging Note: [WQFN]; Supertex Legacy Package K7 © 2021 Microchip Technology Inc.

DS20005911B-page 14  2023-2026 Microchip Technology Inc. and its subsidiaries NOTES:

 2023-2026 Microchip Technology Inc. and its subsidiaries DS20005911B-page 15 HV861 APPENDIX A: REVISION HISTORY Revision B (January 2026)

• Added the Obsolete Device label on the first page. Revision A (June 2023)
• Converted Supertex Doc# DSFP-HV861 to Microchip DS20005911A
• Changed the package marking format
• Changed the quantity of the 16-lead WQFN Package from 3000/Reel to 3300/Reel to align packaging specifications with the actual BQM
• Made minor text changes throughout the docu- ment

DS20005911B-page 16  2023-2026 Microchip Technology Inc. and its subsidiaries PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office. Example: a) HV861K7-G: Low-Noise Dimmable Dual EL Lamp Driver, 16-lead WQFN (3 X 3), 3300/Reel PART NO. Device Device: HV861 = Low-Noise Dimmable Dual EL Lamp Driver Package: K7 = 16-lead WQFN (3 X 3) Environmental: G = Lead (Pb)-free/RoHS-compliant Package Media Type: (blank) = 3300/Reel for a K7 Package XX Package - X - X Environmental Media Type Options

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