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| SM8145A NIPPON PRECISION CIRCUITS INC. Dual EL Driver 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. FEATURES I I I PINOUT (Top view) I I I I I I 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 15 14 13 12 11 OUTCOM N.C. OUT1 N.C. CHV OUT2 N.C. VDD N.C. ENA1 16 17 18 19 20 8145A 12345 10 9 8 7 6 ENA2 OCE OCL3 N.C. OCL2 APPLICATIONS I I I Mobile phone PDA, Handheld PC Illumination accessory ORDERING INFORMATION D e vice SM8145AB P ackag e 20-pin QFN PACKAGE DIMENSIONS (Unit : mm) Weight : 0.037g 4.20 0.20 4.00 0.10 15 16 11 10 4.20 0.20 4.00 0.10 20 6 1 0.50 5 LDR N.C. VSS N.C. OCL1 0.60 0.10 + 0.03 0.02 - 0.02 0.05 0.22 0.05 0.05 M NIPPON PRECISION CIRCUITS--1 1.00max 0.22 SM8145A BLOCK DIAGRAM VIC VBOOST EL 1 EL 2 VDD LDR CHV OUT1 OUTCOM OUT2 High Voltage Switching Circuit Divider Divider Oscillator Control logic Oscillator OCL1 OCL2 ROCL1 OCL3 ROCL2 ROCL3 ENA1 ENA2 OCE ROCE VSS PIN DESCRIPTION Pin nu m b e r 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name LDR N . C. VSS N . C. OCL1 OCL2 N . C. OCL3 OCE ENA2 ENA1 N . C. VDD N . C. OUT2 OUTCOM N . C. OUT1 N . C. CHV I/O O - - - I I - I I Ip 1 Ip 1 - - - O O - O - I Booster coil driver output No connection (must be open) Ground No connection (must be open) Coil driver oscillator 1 (oscillator frequency determined by external resistor) Coil driver oscillator 2 (oscillator frequency determined by external resistor) No connection (must be open) Coil driver oscillator 3 (oscillator frequency determined by external resistor) EL driver oscillator (oscillator frequency determined by external resistor) E n a ble input 2 (HIGH: enable, LOW : disable) E n a ble input 1 (HIGH: enable, LOW : disable) No connection (must be open) Supply No connection (must be open) Output 2 Output (common) No connection (must be open) Output 1 No connection (must be open) High-voltage DC input Function 1. Built-in pull-down resistor. NIPPON PRECISION CIRCUITS--2 SM8145A SPECIFICATIONS Absolute Maximum Ratings P arameter Supply voltage range Input voltage range Symbol VDD V IN VCHV Output voltage VLDR VOUT1/2/COM Pow er dissipation Storage temperature range PD TSTG All Input pins CHV pin LDR pin OUT1, OUT2, OUTCOM pin T a 70 C T a 85 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 120 140 100 - 55 to 125 Unit V V V V V mW mW C Recommended Operating Conditions Rating P arameter Supply voltage range Operating temperature Symbol VDD2 TO P R Including coil current, V D D = 3.0V, T a 70 C Operating current 1 ID D 2 Including coil current, V D D = 5.0V, T a 70 C Including coil current, V D D = 3.0V, T a 85 C Including coil current, V D D = 5.0V, T a 85 C Coil inductance LLDR fL D R = 64 kHz Condition min 1.6 - 40 - - - - - typ 3.0 - - - - - 0.47 max 5.5 85 85 51 60 36 - V C mA mA mA mA mH Unit 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 Supply voltage CHV output voltage O U T 1 , O U T 2 , O U T C O M H I G H - l evel output voltage O U T 1 , O U T 2 , O U T C O M L OW -level output voltage LDR output resistance OCE oscillator frequency OCE oscillator frequency range OCL1, OCL2, OCL3 oscillator frequency OCL1, OCL2, OCL3 oscillator frequency range OUT1, OUT2, OUTCOM output frequency OUT1, OUT2, OUTCOM output frequency range LDR inductance driver frequency LDR inductance driver frequency range ENA1, ENA2 HIGH-level input voltage E N A 1 , E N A 2 L OW -level input voltage ENA1, ENA2 input current ENA1, ENA2 r ise Operating current Stand-by current 1. 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 Excluding coil current E N A = L OW ENA = 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 = 180 k R O C E = 180 k R O C L = 180 k IL D R = 50 mA R O C E = 180 k Condition min 1.6 0.5 - - - 205 32 205 32 200 31 51 8 V D D - 0.5 V S S - 0.3 2.0 - - - typ 3.0 - - - 8.0 256 - 256 - 250 - 64 - - - 4.0 - - - max 5.5 100 100 0.5 12.0 307 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 A ms mA A V V V V V Unit ENA VSS VDD - 0.5 VSS + 0.5 VDD tENA NIPPON PRECISION CIRCUITS--4 SM8145A FUNCTIONAL DESCRIPTION DISPLAY MODES ENA input Operation mode ENA1 Standby EL1 EL2 EL1 + EL2 L H L H ENA2 L L H H OUTCOM L Active Active Active OUT1 L Active Hi-Z Active OUT2 L Hi-Z Active Active ROCL - R OCL1 R OCL2 ROCL3 OUTPUT status Brightness adjust 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. OUT1 ;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;; HI-Z ;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;; HI-Z ;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;; max 100V0-P 0V max 100V0-P 0V max 100V0-P 0V OUTCOM OUT2 EL 1 OFF(0V) max 200VP-P EL 2 OFF(0V) max 200VP-P ENA1 = LOW ENA2 = LOW ENA1 = HIGH ENA2 = LOW ENA1 = HIGH ENA2 = HIGH ENA1 = LOW ENA2 = HIGH NIPPON PRECISION CIRCUITS--5 SM8145A TYPICAL APPLICATIONS I EL size: 20 + 20cm2, Current consumption: 20 + 20mA 0.1F 100V CHV LDR OUT1 OUTCOM OUT2 VSS VDD ENA1 ENA2 OCE EL 20cm2 EL 20cm2 0.01F 470H OCL1 OCL2 OCL3 180k 180k 3.0V 360k 180k Diode: TOSHIBA 1SS250 Coil: MURATA LQH4N471K04M00 I EL size: 20 + 30cm2, Current consumption: 20 + 30mA 0.1F 100V CHV LDR OUT1 OUTCOM OUT2 VSS VDD ENA1 ENA2 OCE EL 20cm2 EL 30cm2 1k 0.01F 470H OCL1 OCL2 OCL3 180k 270k 3.0V 430k 180k Diode: TOSHIBA 1SS250 Coil: MURATA LQH4N471K04M00 I EL size: 10 + 30cm2, Current consumption: 10 + 30mA 0.1F 100V CHV LDR OUT1 OUTCOM OUT2 VSS VDD ENA1 ENA2 OCE EL 10cm2 EL 30cm2 1k 0.01F 470H OCL1 OCL2 OCL3 91k 270k 3.0V 360k 180k Diode: TOSHIBA 1SS250 Coil: MURATA LQH4N471K04M00 Note: Connect a 1k 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. 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 INC. NIPPON PRECISION CIRCUITS--7 |
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