SM8143A EL Sheet Driver NIPPON PRECISION CIRCUITS INC. OVERVIEW The SM8143A is a transformer-less electroluminescent (EL) driver IC, capable of driving displays up to 80 cm2 in size. It is a high-efficiency driver that features revised coil switching transistor ON resistance and output circuit configuration to reduce loss. The EL drive frequency and coil drive frequency can be controlled independently, making the driver circuit optimizable to match application requirements. A microcontroller interface pin (ENA) is provided, which can be used to control the EL driver ON/OFF function. The device is available in 16-pin VSOP packages. FEATURES ■ ■ ■ ■ ■ ■ (Top view) N.C. LDR N.C. VSS OUT2 N.C. VDD ENA 8 9 OCE PACKAGE DIMENSIONS ORDERING INFORMATION D e vice P ackag e SM8143AV 16-pin V S O P (Unit : mm) 4.4 0.2 6.4 0.2 ■ Hand held PC, Palm size PC Mobile IT equipment White EL N.C. N.C. OCL N.C. OUT1 N.C. APPLICATIONS ■ 16 CHV *: Adjustable with external resistance. ■ 1 8143AV ■ Dedicated EL driver 1.6 to 5.5 V supply voltage 150mA maximum operating current (VDD = 3.0V, Ta ≤ 70°C) 3.5Ω typical output resistance 200 Vp-p maximum EL driver voltage* 31 to 1500 Hz EL drive frequency range* High voltage CMOS Process 16-pin VSOP plastic package + 0.1 0.05 0.15 - 0.275TYP 5.1 0.2 0 10 0.65 0.10 + 0.10 0.22 - 0.05 0.12 M 0.10 0.05 1.15 0.1 ■ PINOUT 0.5 0.2 NIPPON PRECISION CIRCUITS—1 SM8143A BLOCK DIAGRAM EL sheet < 80cm2 VDD LDR CHV OUT1 OUT2 Switching Circuit Boosting Block VSS Dividing Circuit 1/4 Dividing Circuit 1/1024 Oscillator for Boosting Oscillator for EL driving ENA OCE OCL Oscillation Block ROCL ROCE ENA from microcontroller When ENA is logical "H", SM8143A is active. Note: Brightness and operating current are adjusted with R O C L . EL driving frequency is adjusted with R O C E . PIN DESCRIPTION Pin nu m b e r Name I/O Function 1 N . C. – No connection (must be open) 2 CHV I High-voltage DC input 3 N . C. – No connection (must be open) 4 LDR O Booster coil driver output 5 N . C. – No connection (must be open) 6 VSS – Ground 7 N . C. – No connection (must be open) 8 OCL I Coil driver oscillator (oscillator frequency determined by external resistor) 9 OCE I EL driver oscillator (oscillator frequency determined by external resistor) 10 ENA I E n a ble input (built-in pull-down resistor) 11 VDD – Supply 12 N . C. – No connection (must be open) 13 OUT2 O Output 2 14 N . C. – No connection (must be open) 15 OUT1 O Output 1 16 N . C. – No connection (must be open) NIPPON PRECISION CIRCUITS—2 SM8143A SPECIFICATIONS Absolute Maximum Ratings P arameter Symbol Supply voltage range VDD Input voltage range V IN Output voltage Storage temperature range All Input pins Rating Unit − 0.3 to 7.0 V V S S − 0.3 to V D D + 0.3 V VCHV CHV pin 0.5 to 120 V VLDR LDR pin 0.5 to 120 V OUT1, OUT2 pin 0.5 to 120 V T a ≤ 70 °C 200 mW T a ≤ 85 °C 140 mW − 55 to 125 °C VOUT1/2 Pow er dissipation Condition PD TSTG Recommended Operating Conditions Rating P arameter Symbol Condition Unit min typ max Supply voltage range VDD2 1.6 3.0 5.5 V Operating temperature TO P R − 40 – 85 °C Including coil current, V D D = 3.0V, T a ≤ 70 °C – – 150 mA Including coil current, V D D = 5.0V, T a ≤ 70 °C – – 100 mA Including coil current, V D D = 3.0V, T a ≤ 85 °C – – 105 mA Including coil current, V D D = 5.0V, T a ≤ 85 °C – – 70 mA fL D R = 64 kHz – 0.47 – mH Operating current 1 Coil inductance ID D 2 LLDR 1. Max value is as same as Absolute Maximum Ratings. NIPPON PRECISION CIRCUITS—3 SM8143A DC Characteristics VDD = 3.0 V, Ta = 25 °C unless otherwise noted. Rating P arameter Symbol Condition Unit min typ max Supply voltage VDD 1.6 3.0 5.5 V CHV output voltage VCHV 0.5 – 100 V OUT1, OUT2 HIGH-level output voltage VOUTH – – 100 V O U T 1 , O U T 2 L OW -level output voltage VOUTL – – 0.5 V LDR output resistance R LDR IL D R = 50 mA – 3.5 5.25 Ω OCE oscillator frequency fO C E 1 R O C E = 180 k Ω 205 256 307 OCE oscillator frequency range fO C E 2 32 – 1536 OCL oscillator frequency fO C L 1 205 256 307 OCL oscillator frequency range fO C L 2 32 – 1536 OUT1, OUT2 output frequency fO U T 1 200 250 300 OUT1, OUT2 output frequency range fO U T 2 31 – 1500 LDR inductance driver frequency fL D R 1 51 64 77 LDR inductance driver frequency range fL D R 2 8 – 384 ENA HIGH-level input voltage VENAH ENA = HIGH, V D D = 1.6 to 5.5V V D D – 0.5 – V D D + 0.3 E N A L OW -level input voltage VENAL E N A = L OW , V D D = 1.6 to 5.5V V S S – 0.3 – V S S + 0.5 ENA input current IE N A H V E N A H = V D D = 3.0V 2.0 4.0 6.0 µA – – 100 µs ENA r ise time 1 R O C L = 180 k Ω R O C E = 180 k Ω R O C L = 180 k Ω tE N A kHz kHz Hz kHz V Operating current ID D 1 Excluding coil current – – 1.0 mA Stand-by current IS T B E N A = L OW – – 1.0 µA 1. ENA VSS VDD − 0.5 VDD VSS + 0.5 tENA NIPPON PRECISION CIRCUITS—4 SM8143A TYPICAL APPLICATIONS ■ EL sheet size: 20 to 30cm2, Current consumption: 20mA 0.1µF 100V 470µH 0.01µF 3.0V N.C. N.C. CHV OUT1 N.C. N.C. LDR OUT2 N.C. N.C. VSS VDD N.C. ENA OCL OCE 180kΩ EL sheet 180kΩ Diode: TOSHIBA 1SS250 Coil: MURATA LQH4N471K04M00 ■ EL sheet size: 30 to 50cm2, Current consumption: 40mA 0.1µF 100V 470µH 0.01µF 3.0V N.C. N.C. CHV OUT1 N.C. N.C. LDR OUT2 N.C. N.C. VSS VDD N.C. ENA OCL OCE 360kΩ EL sheet 180kΩ Diode: TOSHIBA 1SS250 Coil: MURATA LQH4N471K04M00 ■ EL sheet size: 50 to 100cm2, Current consumption: 80mA 0.1µF 100V 330µH 0.01µF 3.0V N.C. N.C. CHV OUT1 N.C. N.C. LDR OUT2 N.C. N.C. VSS VDD N.C. ENA OCL OCE 510kΩ EL sheet 180kΩ Diode: TOSHIBA 1SS250 Coil: TOKO D73LC (817CE331M) Note: Do not operate the S M 8 1 4 3 A with the EL sheet NOT connected (no load to OUT1/OUT2) since the IC will be damaged. NIPPON PRECISION CIRCUITS—5 SM8143A NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility fo r the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification. The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter, including compliance with expor t controls on the distribution or dissemination of the products. Customers shall not expor t, directly or indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies. NIPPON PRECISION CIRCUITS INC. NIPPON PRECISION CIRCUITS INC. 4-3, Fukuzumi 2-chome Koto-ku, Tokyo 135-8430, Japan Telephone: 03-3642-6661 Facsimile: 03-3642-6698 NC9923AE 2000.05 NIPPON PRECISION CIRCUITS—6