SM8145A Dual EL Driver NIPPON PRECISION CIRCUITS INC. OVERVIEW The SM8145A is an Electro Luminescent (EL) driver IC that can drive two EL displays simultaneously. Each EL display mode ON/OFF function can be separately controlled using two enable (ENA) pins. The luminance in each display mode can be adjusted, enabling the luminance and consumption current to be optimized to match the application. The device is supplied in ultra-small leadless QFN-20 packages, making driver circuit miniaturization possible. ■ ■ ■ ■ ■ ■ 15 14 13 12 11 OUTCOM N.C. OUT1 N.C. CHV 16 17 18 19 20 8145A LDR N.C. VSS N.C. OCL1 ORDERING INFORMATION PACKAGE DIMENSIONS (Unit : mm) P ackag e SM8145AB 20-pin QFN Weight : 0.037g 4.20 ± 0.20 4.00 ± 0.10 15 11 10 16 20 6 1 5 0.60 ± 0.10 0.50 + 0.03 0.02 − 0.02 D e vice 4.00 ± 0.10 ■ Mobile phone PDA, Handheld PC Illumination accessory 4.20 ± 0.20 ■ ENA2 OCE OCL3 N.C. OCL2 1 2 3 4 5 APPLICATIONS ■ 10 9 8 7 6 0.22 ■ 2 separate EL display drivers 2-display simultaneous driver operation Adjustable luminance and current consumption in each mode 3 display modes and a standby mode select control pins (ENA1, ENA2) 1 to 30cm2 EL display size per channel 1.6 to 5.5V supply voltage 200 Vp-p maximum EL driver voltage 20-pin QFN ultra-small leadless package High voltage CMOS Process 1.00max ■ ■ PINOUT (Top view) OUT2 N.C. VDD N.C. ENA1 FEATURES 0.05 0.22 ± 0.05 0.05 M NIPPON PRECISION CIRCUITS—1 SM8145A BLOCK DIAGRAM VIC EL 2 EL 1 VBOOST VDD LDR CHV OUT1 OUTCOM OUT2 High Voltage Switching Circuit Divider Divider Oscillator OCL1 OCL2 ROCL1 Control logic Oscillator OCL3 ROCL2 OCE ROCL3 ENA1 ENA2 VSS ROCE PIN DESCRIPTION Pin nu m b e r Name I/O 1 LDR O Booster coil driver output 2 N . C. – No connection (must be open) 3 VSS – Ground 4 N . C. – No connection (must be open) 5 OCL1 I Coil driver oscillator 1 (oscillator frequency determined by external resistor) 6 OCL2 I Coil driver oscillator 2 (oscillator frequency determined by external resistor) 7 N . C. – No connection (must be open) 8 OCL3 I Coil driver oscillator 3 (oscillator frequency determined by external resistor) 9 OCE I EL driver oscillator (oscillator frequency determined by external resistor) ENA2 Ip 1 E n a ble input 2 (HIGH: enable, LOW : disable) 11 ENA1 Ip 1 E n a ble input 1 (HIGH: enable, LOW : disable) 12 N . C. – No connection (must be open) 13 VDD – Supply 14 N . C. – No connection (must be open) 15 OUT2 O Output 2 16 OUTCOM O Output (common) 17 N . C. – No connection (must be open) 18 OUT1 O Output 1 19 N . C. – No connection (must be open) 20 CHV I High-voltage DC input 10 Function 1. Built-in pull-down resistor. NIPPON PRECISION CIRCUITS—2 SM8145A 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, OUTCOM pin 0.5 to 120 V T a ≤ 70 °C 140 mW T a ≤ 85 °C 100 mW − 55 to 125 °C VOUT1/2/COM 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 – – 85 mA Including coil current, V D D = 5.0V, T a ≤ 70 °C – – 51 mA Including coil current, V D D = 3.0V, T a ≤ 85 °C – – 60 mA Including coil current, V D D = 5.0V, T a ≤ 85 °C – – 36 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 SM8145A 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 O U T 1 , O U T 2 , O U T C O M H I G H - l evel output voltage VOUTH – – 100 V O U T 1 , O U T 2 , O U T C O M L OW -level output voltage VOUTL – – 0.5 V LDR output resistance R LDR IL D R = 50 mA – 8.0 12.0 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 OCL1, OCL2, OCL3 oscillator frequency fO C L 1 205 256 307 OCL1, OCL2, OCL3 oscillator frequency range fO C L 2 32 – 1536 OUT1, OUT2, OUTCOM output frequency fO U T 1 200 250 300 OUT1, OUT2, OUTCOM 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 ENA1, ENA2 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 1 , E N A 2 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 ENA1, ENA2 input current IE N A H V E N A H = V D D = 3.0V 2.0 4.0 6.0 µA – – 100 ms R O C L = 180 k Ω kHz kHz R O C E = 180 k Ω Hz ENA1, ENA2 r ise time 1 R O C L = 180 k Ω tE N A 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 SM8145A FUNCTIONAL DESCRIPTION DISPLAY MODES ENA input OUTPUT status Brightness adjust Operation mode ENA1 ENA2 OUTCOM OUT1 OUT2 ROCL Standby L L L L L – EL1 H L Active Active Hi-Z R OCL1 EL2 L H Active Hi-Z Active R OCL2 EL1 + EL2 H H Active Active Active ROCL3 Notes) The internal oscillator resistance is selected in response to the state of the ENA pins. The oscillator resistance (R O C E 1 / 2 / 3 ) adjust the luminance in each display mode, respectively. ;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;; HI-Z ;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;; OUT1 max 100V0-P 0V max 100V0-P OUTCOM 0V max 100V0-P ;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;; HI-Z ;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;; OUT2 0V OFF(0V) EL 1 OFF(0V) EL 2 ENA1 = LOW ENA2 = LOW ENA1 = HIGH ENA2 = LOW max 200VP-P max 200VP-P ENA1 = HIGH ENA2 = HIGH ENA1 = LOW ENA2 = HIGH NIPPON PRECISION CIRCUITS—5 SM8145A TYPICAL APPLICATIONS ■ EL size: 20 + 20cm2, Current consumption: 20 + 20mA 0.1µF 100V 0.01µF CHV OUT1 LDR OUTCOM 470µH EL 20cm2 OUT2 180kΩ 180kΩ 3.0V EL 20cm2 VSS VDD OCL1 ENA1 OCL2 ENA2 OCL3 OCE 360kΩ 180kΩ Diode: TOSHIBA 1SS250 Coil: MURATA LQH4N471K04M00 ■ EL size: 20 + 30cm2, Current consumption: 20 + 30mA 0.1µF 100V 0.01µF CHV OUT1 LDR OUTCOM 470µH EL 30cm2 OUT2 180kΩ 270kΩ 3.0V EL 20cm2 VSS VDD OCL1 ENA1 OCL2 ENA2 OCL3 OCE 430kΩ 1kΩ 180kΩ Diode: TOSHIBA 1SS250 Coil: MURATA LQH4N471K04M00 ■ EL size: 10 + 30cm2, Current consumption: 10 + 30mA 0.1µF 100V 0.01µF CHV OUT1 LDR OUTCOM 470µH EL 30cm2 OUT2 91kΩ 270kΩ 3.0V EL 10cm2 VSS VDD OCL1 ENA1 OCL2 ENA2 OCL3 OCE 360kΩ 1kΩ 180kΩ Diode: TOSHIBA 1SS250 Coil: MURATA LQH4N471K04M00 Note: Connect a 1k Ω resistor to protect IC when the EL is over 20cm 2 per channel. Note: Do not operate the S M 8 1 4 5 A with the EL NOT connected (no load to OUTCOM/OUT1/OUT2) since the IC will be damaged. NIPPON PRECISION CIRCUITS—6 SM8145A 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: +81-3-3642-6661 Facsimile: +81-3-3642-6698 http://www.npc.co.jp/ Email: sales @ npc.co.jp NC0001AE 2000.10 NIPPON PRECISION CIRCUITS—7