SM8142 EL Sheet Driver NIPPON PRECISION CIRCUITS INC. OVERVIEW The SM8142 is a transformer-less electroluminescent (EL) sheet lamp driver, capable of driving sheets up to 30 cm2 in size. It employs a high-efficiency driver output circuit configuration to control power dissipation. It is available in ultra-small 8-pin SON (Small Outline Non-leaded) packages*, making possible the construction of small, thin, low-power driver units. * : SM8142×D FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Dedicated EL driver Noise-less smooth drive waveform High-efficiency output circuit Two oscillator circuits built-in (SM8142A) Stand-by function (SM8142B) Stable temperature characteristics Ultra-small package 1.6 to 5.5 V supply voltage 0.3 mA typ. (VDD = 3.0 V) current consumption (excluding coil current) 200 Vp-p maximum EL driver voltage 31 to 1000 Hz EL drive frequency range 0.22 mH minimum coil inductance ORDERING INFORMATION D e vice P ackag e SM8142AD 8-pin SON SM8142BD 8-pin SON SM8142AV 8-pin V S O P SM8142BV 8-pin V S O P NIPPON PRECISION CIRCUITS—1 SM8142 PINOUT (Top View) ■ PACKAGE DIMENSIONS (Unit : mm) 8-pin SON ■ 8-pin SON SM8142AD 5 OUT2 SM8142BD + 0.1 0.80 − 0.05 6 OUT1 0.48typ 0.125 ± 0.05 VDD 4 7 CHV 0.65 0.05 + 0.1 0.30 − 0.05 8 ENA 3 4 2B OSC 2 VDD 4 7 CHV 6 OUT1 5 OUT2 8-pin VSOP ■ 8-pin VSOP 8 OUT1 LDR 2 7 OUT2 VSS 3 6 VDD OCL 4 5 OCE 8142A 0.575 typ 1 8 OUT1 LDR 2 7 OUT2 VSS 3 6 VDD OSC 4 5 ENA 1.15 ± 0.05 CHV 8142B +0.1 0.15 −0.05 3.1 ± 0.3 SM8142BV 0.5 ± 0.2 1 6.4 ± 0.3 CHV 4.4 ± 0.2 SM8142AV 0.65 0.22 ± 0.1 0.1 ± 0.05 ■ LDR 0.20 ± 0.08 VSS 1 0.05 M 0.20 ± 0.08 OCE 3 4 2A OCL 2 LDR 2.80 ± 0.1 8 VSS 1 3.00 ± 0.1 2.90 ± 0.1 NIPPON PRECISION CIRCUITS—2 SM8142 BLOCK DIAGRAM ■ SM8142A ■ SM8142B EL sheet EL sheet VDD LDR CHV OUT1 OUT2 VDD LDR CHV Dividing Circuit Oscillator for Boosting Voltage Oscillator for EL Driving VSS Dividing Circuit Dividing Circuit Oscillator for Boosting Voltage and EL Driving OCE OCL OUT2 High Voltage Switching Circuit High Voltage Switching Circuit Dividing Circuit OUT1 VSS OSC ENA PIN DESCRIPTION Pin nu m b e r Ver. Name I/O 7 A/B CHV I High-voltage DC input 2 8 A/B LDR O Booster coil driver output 3 1 A/B VSS – Ground A OCL I Coil driver oscillator (oscillator frequency determined by external resistor) B OSC I Coil and EL driver oscillator (oscillator frequency determined by external resistor) A OCE I EL driver oscillator (oscillator frequency determined by external resistor) B ENA Ip 1 E n a ble input (HIGH: enable, LOW : disable) VSOP-8 SON-8 1 4 5 2 3 Function 6 4 A/B VDD – Supply 7 5 A/B OUT2 O Output 2 8 6 A/B OUT1 O Output 1 1. Built-in pull-down resistor NIPPON PRECISION CIRCUITS—3 SM8142 SPECIFICATIONS Absolute Maximum Ratings P arameter Symbol Supply voltage range VDD Input voltage range V IN Output voltage Condition 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 100 mW − 55 to 125 °C VOUT1/2 Pow er dissipation PD Storage temperature range T stg T a ≤ 85 °C 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 Operating current 1 Including coil current, V D D = 3.0V – – 60 ID D 2 Including coil current, V D D = 5.0V – – 36 fL D R = 64 kHz – 0.47 – Coil inductance LLDR2 mA mH 1. Max value is as same as Absolute Maximum Ratings. NIPPON PRECISION CIRCUITS—4 SM8142 DC Characteristics VDD = 3.0 V, Ta = 25 °C unless otherwise noted. Rating P arameter Ver. Symbol Condition Unit min typ max Supply voltage A/B VDD 1.6 3.0 5.5 V CHV output voltage A/B VCHV 0.5 – 100 V OUT1, OUT2 HIGH-level output voltage A/B VOUTH – – 100 V O U T 1 , O U T 2 L OW -level output voltage A/B VOUTL – – 0.5 V LDR output resistance A/B R LDR IL D R = 50 mA – 8.0 12.0 Ω fO C E 1 R O C E = 180 k Ω 205 256 307 32 – 1024 205 256 307 32 – 1024 205 256 307 32 – 1024 200 250 300 31 – 1000 51 64 77 8 – 256 OCE oscillator frequency A OCE oscillator frequency range fO C E 2 OCL oscillator frequency A OCL oscillator frequency range fO C L 1 R O C L = 180 k Ω fO C L 2 OSC oscillator frequency B OSC oscillator frequency range fO S C 1 R O S C = 180 k Ω fO S C 2 OUT1, OUT2 output frequency A/B OUT1, OUT2 output frequency range fO U T 1 R O C E /R O S C = 180 k Ω fO U T 2 LDR inductance driver frequency A/B LDR inductance driver frequency range fL D R 1 R O C L /R O S C = 180 k Ω fL D R 2 ENA HIGH-level input voltage B E N A L OW -level input voltage kHz kHz kHz Hz kHz VENAH ENA = “H”, V D D = 1.6 to 5.5V V D D – 0.5 – V D D + 0.3 VENAL ENA = “L”, V D D = 1.6 to 5.5V V S S – 0.3 – V S S + 0.5 V ENA input current B IE N A H V E N A H = V D D = 3.0V 2.0 4.0 6.0 µA Operating current A/B ID D 1 Excluding coil current – – 0.5 mA Stand-by current B IS T B ENA = “L” – – 1.0 µA NIPPON PRECISION CIRCUITS—5 SM8142 TYPICAL APPLICATIONS ■ SM8142AD 0.47mH VSS EL sheet size:5cm2 to 10cm2 Current Consumption:15mA LDR OCL CHV OCE OUT1 VDD OUT2 100kΩ C bypass 0.01µF EL sheet 180kΩ 0.1µF 100V 3.0V Diode:TOSHIBA 1SS370 Coil:RIVER ELETEC FLC32PC 0.47mH VSS LDR OCL CHV OCE OUT1 VDD OUT2 C bypass 0.01µF EL sheet size:20cm2 to 30cm2 Current Consumption:20mA 180kΩ EL sheet 180kΩ 0.1µF 100V 3.0V Diode:TOSHIBA 1SS370 Coil:MURATA LQH4N471K04M00 0.47mH VSS LDR OCL CHV OCE OUT1 VDD OUT2 360kΩ C bypass 0.01µF EL sheet size:10cm2 to 15cm 2 Current Consumption:20mA EL sheet 180kΩ 1.5V 0.1µF 100V 3.0V Diode:TOSHIBA 1SS370 Coil:MURATA LQH4N471K04M00 0.47mH VSS LDR OCL CHV OCE OUT1 EL sheet size:30cm 2 to 50cm 2 Current Consumption:40mA 360kΩ EL sheet 180kΩ 1kΩ* VDD 3.0V C bypass 0.01µF OUT2 0.1µF 100V Diode:TOSHIBA 1SS370 Coil:MURATA LQH4N471K04M00 * : Connect a 1k Ω resistor to protect IC when the size of EL sheet is over 30cm 2 . Note: Do not operate the S M 8 1 4 2 with the EL sheet NOT connected (no load to OUT1/OUT2) since the IC will be damaged. NIPPON PRECISION CIRCUITS—6 SM8142 ■ SM8142BD 0.47mH VSS LDR OSC CHV ENA OUT1 VDD OUT2 100kΩ C bypass 0.01µF EL sheet size:5cm2 to 10cm2 Current Consumption:15mA EL sheet 0.1µF 100V 3.0V Diode:TOSHIBA 1SS370 Coil:RIVER ELETEC FLC32PC 0.47mH VSS EL sheet size:20cm2 to 30cm2 Current Consumption:20mA LDR OSC CHV ENA OUT1 VDD OUT2 C bypass 0.01µF 180kΩ EL sheet 0.1µF 100V 3.0V Diode:TOSHIBA 1SS370 Coil:MURATA LQH4N471K04M00 0.22mH VSS LDR OSC CHV ENA OUT1 VDD OUT2 180kΩ 1.5V EL sheet size:10cm2 to 15cm 2 Current Consumption:20mA EL sheet 0.1µF 100V 3.0V Diode:TOSHIBA 1SS370 Coil:MURATA LQH4N221K04M00 0.22mH VSS LDR OSC CHV ENA OUT1 C bypass 0.01µF EL sheet size:30cm 2 to 50cm 2 Current Consumption:40mA 180kΩ EL sheet 1kΩ* VDD 3.0V C bypass 0.01µF OUT2 0.1µF 100V Diode:TOSHIBA 1SS370 Coil:MURATA LQH4N221K04M00 * : Connect a 1k Ω resistor to protect IC when the size of EL sheet is over 30cm 2 . Note: Do not operate the S M 8 1 4 2 with the EL sheet NOT connected (no load to OUT1/OUT2) since the IC will be damaged. NIPPON PRECISION CIRCUITS—7 SM8142 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 for 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 NC9810HE 2000.08 NIPPON PRECISION CIRCUITS—8