SM8143

SM8143A NIPPON PRECISION CIRCUITS INC. EL Sheet Driver 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 s s s PINOUT (Top view) s s s s s 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 N.C. CHV N.C. LDR N.C. VSS N.C. OCL 1 16 N.C. OUT1 N.C. OUT2 N.C. VDD ENA 8143AV *: Adjustable with external resistance. APPLICATIONS s s s 8 9 OCE Hand held PC, Palm size PC Mobile IT equipment White EL PACKAGE DIMENSIONS (Unit : mm) ORDERING INFORMATION D e vice SM8143AV P ackag e 16-pin V S O P 4.4 0.2 6.4 0.2 0.275TYP 5.1 0.2 0.15 - + 0.1 5 0.0 0 10 0.10 0.22 - 0.05 + 0.10 0.10 0.05 1.15 0.1 0.65 0.12 M 0.5 0.2 NIPPON PRECISION CIRCUITS—1 S M8143A BLOCK DIAGRAM EL sheet < 80cm2 VDD LDR CHV OUT1 OUT2 Switching Circuit Boosting Block Dividing Circuit 1/4 Dividing Circuit 1/1024 Oscillator for Boosting VSS ENA OCL Oscillator for EL driving OCE Oscillation Block ROCL ROCE ENA from microcontroller When ENA is logical "H", SM8143A is active. N ote: Brightness and operating current are adjusted with R O C L . EL driving frequency is adjusted with R O C E . PIN DESCRIPTION P in nu m b e r 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Name N . C. CHV N . C. LDR N . C. VSS N . C. OCL OCE ENA VDD N . C. OUT2 N . C. OUT1 N . C. I/O – I – O – – – I I I – – O – O – No connection (must be open) High-voltage DC input No connection (must be open) Booster coil driver output No connection (must be open) Ground No connection (must be open) Coil driver oscillator (oscillator frequency determined by external resistor) EL driver oscillator (oscillator frequency determined by external resistor) E n a ble input (built-in pull-down resistor) Supply No connection (must be open) Output 2 No connection (must be open) Output 1 No connection (must be open) Function NIPPON PRECISION CIRCUITS—2 S M8143A SPECIFICATIONS Absolute Maximum Ratings P arameter S upply voltage range Input voltage range Symbol VDD V IN VCHV Output voltage VLDR VOUT1/2 Pow er dissipation Storage temperature range PD TSTG A ll Input pins C HV pin L DR pin O UT1, OUT2 pin T a ≤ 7 0 °C T a ≤ 8 5 °C Condition Rating − 0 .3 to 7.0 V S S − 0 .3 to V D D + 0 .3 0.5 to 120 0.5 to 120 0.5 to 120 200 140 − 5 5 to 125 Unit V V V V V mW mW °C Recommended Operating Conditions Rating P arameter S upply voltage range Operating temperature Symbol VDD2 TO P R I ncluding coil current, V D D = 3 .0V, T a ≤ 7 0 °C Operating current 1 ID D 2 Including coil current, V D D = 5 .0V, T a ≤ 7 0 °C Including coil current, V D D = 3 .0V, T a ≤ 8 5 °C Including coil current, V D D = 5 .0V, T a ≤ 8 5 °C Coil inductance LLDR fL D R = 6 4 kHz Condition min 1 .6 − 40 – – – – – typ 3.0 – – – – – 0.47 max 5.5 85 150 100 105 70 – V °C mA mA mA mA mH Unit 1 . Max value is as same as Absolute Maximum Ratings. NIPPON PRECISION CIRCUITS—3 S M8143A DC Characteristics VDD = 3.0 V, Ta = 25 °C unless otherwise noted. Rating P arameter S upply voltage CHV output voltage OUT1, OUT2 HIGH-level output voltage O U T 1 , O U T 2 L OW -level output voltage LDR output resistance O CE oscillator frequency OCE oscillator frequency range OCL oscillator frequency OCL oscillator frequency range OUT1, OUT2 output frequency OUT1, OUT2 output frequency range LDR inductance driver frequency LDR inductance driver frequency range ENA HIGH-level input voltage E N A L OW -level input voltage ENA input current ENA r ise time 1 Symbol VDD VCHV VOUTH VOUTL R LDR fO C E 1 fO C E 2 fO C L 1 fO C L 2 fO U T 1 fO U T 2 fL D R 1 fL D R 2 VENAH VENAL IE N A H tE N A ID D 1 IS T B E xcluding coil current E N A = L OW E NA = HIGH, V D D = 1 .6 to 5.5V E N A = L OW , V D D = 1 .6 to 5.5V V E N A H = V D D = 3 .0V R O C L = 1 80 k Ω R O C E = 1 80 k Ω R O C L = 1 80 k Ω IL D R = 5 0 mA R O C E = 1 80 k Ω Condition min 1 .6 0 .5 – – – 2 05 32 2 05 32 2 00 31 51 8 V D D – 0 .5 V S S – 0 .3 2.0 – – – typ 3.0 – – – 3.5 256 – 256 – 250 – 64 – – – 4.0 – – – max 5.5 100 100 0.5 5.25 307 kHz 1536 307 kHz 1536 300 Hz 1500 77 kHz 384 V D D + 0 .3 V S S + 0 .5 6.0 100 1.0 1.0 µA µs mA µA V V V V V Ω Unit Operating current Stand-by current 1. ENA VSS VDD − 0.5 VSS + 0.5 VDD tENA NIPPON PRECISION CIRCUITS—4 S M8143A TYPICAL APPLICATIONS s EL sheet size: 20 to 30cm2, Current consumption: 20mA 0.1µF 100V N.C. CHV N.C. N.C. OUT1 N.C. OUT2 N.C. VDD ENA OCE EL sheet 0.01µF 470µH LDR N.C. VSS N.C. OCL 3.0V 180kΩ Diode: TOSHIBA 1SS250 Coil: MURATA LQH4N471K04M00 180kΩ s EL sheet size: 30 to 50cm2, Current consumption: 40mA 0.1µF 100V N.C. CHV N.C. N.C. OUT1 N.C. OUT2 N.C. VDD ENA OCE EL sheet 0.01µF 470µH LDR N.C. VSS N.C. OCL 3.0V 360kΩ Diode: TOSHIBA 1SS250 Coil: MURATA LQH4N471K04M00 180kΩ s EL sheet size: 50 to 100cm2, Current consumption: 80mA 0.1µF 100V N.C. CHV N.C. N.C. OUT1 N.C. OUT2 N.C. VDD ENA OCE EL sheet 0.01µF 330µH LDR N.C. VSS N.C. OCL 3.0V 510kΩ Diode: TOSHIBA 1SS250 Coil: TOKO D73LC (817CE331M) 180kΩ N ote: 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 S M8143A N IPPON 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. 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 INC. NIPPON PRECISION CIRCUITS—6