sm8146a Seiko NPC Corp., sm8146a Datasheet
sm8146a
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sm8146a Summary of contents
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... OVERVIEW The SM8146AD1 is a dedicated EL (Electro Luminescence) driver IC, capable of driving EL sheet 30cm in size. The EL drive circuit uses a technique that generates smooth sine wave EL drive waveforms without an output resistor, which has the advantage of preventing EL sheet audible noise, eliminating the need for additional peripheral components and a corresponding drop in power efficiency. Also, the EL drive voltage is constant-voltage controlled and is unaffected by supply voltage fl ...
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... O 8 CHV I 9 LDR O 10 VSS – 1. Pull-down resistor built-in BLOCK DIAGRAM < < 1. SM8146AD1 OCL VSS 1 10 OCE LDR DIM CHV ENA OUT1 VDD OUT2 Function Coil drive oscillator pin (frequency adjusted using an external resistor) EL drive oscillator pin (frequency adjusted using an external resistor) ...
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... DD2 Operating temperature range T OPR 1 Operating current I DD2 Coil inductance L LDR 1. This value includes current tolerance and should not be exceeded. SM8146AD1 Conditions All input pins CHV pin LDR pin OUT1, OUT2 pins Ta ≤ 85 ° Conditions Including coil current 3.0V DD Including coil current ...
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... VDD Standby current VDD the rating between the following levels. ENA 0.5 DD ENA ENA 2. Design guarantee value SM8146AD1 Symbol Conditions V V maximum setting OUT OUT 50mA LDR LDR = 200k Ω OCE1 OCE f OCE2 = 100k Ω ...
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... EL load is removed. Interface The SM8146AD1 uses an interface comprised by the ENA and DIM input pins. The ENA and DIM pins have a HIGH-level input voltage range of 1.4V to VDD + 0.3V, enabling direct control from a 1.8V system microcon- troller without the need for a voltage converter. Pull-down resistances are built-in. ...
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... EL Brightness Adjustment The SM8146AD1 EL brightness can be adjusted using a combination of two methods: (1) EL drive voltage control and (2) EL drive frequency control. (1) EL Brightness Adjustment using EL Drive Voltage This dimming function changes the EL brightness in response to the EL drive voltage determined by the num- ber of input pulses on the DIM pin. An internal counter is used to count the number of DIM input pulses and the OUT1/OUT2 EL drive voltage amplitude level changes in response, varying the EL brightness ...
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... EL brightness can be adjusted. VDD pin ENA pin V DIM pin Internal status DATA0: 85V DATA1: 78V DATA2: 71V DATA3: 64V DATA4: 57V DATA5: 50V DATA6: 43V DATA7: 0V SM8146AD1 85V 64V 57V 50V 43V 114Vp-p 86Vp-p ...
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... DIM pin t > 3µsec Internal DIMH status t DIML DATA0: 85V DATA1: 78V DATA2: 71V DATA3: 64V DATA4: 57V DATA5: 50V DATA6: 43V DATA7: 0V SM8146AD1 7 pulse 7 pulse 7 pulse DATA: 7-5 DATA: 6-4 DATA: 5-3 DATA:0 DATA:1 DATA:2 DATA:3 DATA:4 DATA:5 > 3µsec Recommended setting value 90msec ...
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... This condition can be caused by the inductor supply voltage being too low, the inductance value being too high, the inductor fre- quency being too high, the EL drive frequency being too high, or the EL surface area being too large. SM8146AD1 OUT1 OUT2 − ...
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... R = 100kΩ OCE 20.0 15 150kΩ 120kΩ OCE OCE 10.0 5.0 3.20 3.40 3.60 3.80 4.00 4.20 V [V] DD Figure VS SM8146AD1 R OCL OCL VSS R OCE LDR OCE DIM CHV OUT1 ENA VDD OUT2 D : TOSHIBA 1SS403 L : TAIYO YUDEN NR4012T221M C2 : MURATA GRM3192C2A222JA01 OCL OCE OUT OUT [kΩ ...
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... Power supply from stabilizing supply V > 1. OFF OFF V > 1.4V IH Ragulated voltage [V] [mA] [µH] 3.0 17.4 3.3 20.6 220 4.0 20.0 5.0 15.5 SM8146AD1 R OCL OCL VSS R OCE LDR OCE DIM CHV OUT1 ENA VDD OUT2 D : TOSHIBA 1SS403 L : TAIYO YUDEN NR4012T221M C2 : Refer to the table below OCL OCE OUT OUT [kΩ ...
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... R = 220kΩ OCE R = 180kΩ OCE 20.0 15 270kΩ OCE 10.0 5.0 3.20 3.40 3.60 3.80 4.00 4.20 V [V] DD Figure VS SM8146AD1 R OCL OCL VSS R OCE LDR OCE DIM CHV OUT1 ENA VDD OUT2 D : TOSHIBA 1SS403 L : TAIYO YUDEN NR4012T221M C2 : MURATA GRM3192C2A222JA01 OCL OCE OUT OUT [kΩ ...
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... Power supply from stabilizing supply V > 1. OFF OFF V > 1.4V IH Ragulated voltage [V] [mA] [µH] 3.0 21.0 3.3 20.9 220 4.0 19.2 5.0 20.2 SM8146AD1 R OCL OCL VSS R OCE LDR OCE DIM CHV OUT1 ENA VDD OUT2 D : TOSHIBA 1SS403 L : TAIYO YUDEN NR4012T221M C2 : Refer to the table below OCL OCE OUT OUT [kΩ ...
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... R = 300kΩ OCE 20.0 15 430kΩ 330kΩ OCE OCE 10.0 5.0 3.20 3.40 3.60 3.80 4.00 4.20 V [V] DD Figure VS SM8146AD1 R OCL OCL VSS R OCE LDR OCE DIM CHV OUT1 ENA VDD OUT2 D : TOSHIBA 1SS403 L : TAIYO YUDEN NR4012T221M C2 : MURATA GRM3192C2A332JA01 OCL OCE OUT OUT [kΩ ...
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... Power supply from stabilizing supply V > 1. OFF OFF V > 1.4V IH Ragulated voltage [V] [mA] [µH] 3.0 18.4 3.3 20.5 220 4.0 20.8 5.0 20.8 SM8146AD1 R OCL OCL VSS R OCE LDR OCE DIM CHV OUT1 ENA VDD OUT2 D : TOSHIBA 1SS403 L : TAIYO YUDEN NR4012T221M C2 : Refer to the table below OCL OCE OUT OUT [kΩ ...
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... IC and lead to electrostatic breakdown. Accordingly, the EL sheet should be designed so that the electrodes are not exposed, or otherwise covered using insulating tape to provide a similar level of protection. SM8146AD1 and R should be optimized per inductor.) ...
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... EVALUATION BOARD PATTERN SM8146AD1 Pattern (Top view) Silk + Resist (Top view) Pattern (Bottom view) SEIKO NPC CORPORATION —17 ...
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... PACKAGE DIMENSIONS (Unit: mm) TOP VIEW 3.1 ± 0.05 0.05 FOOTPRINT 0.50 1.60 2.25 3.25 Foot pattern SM8146AD1 BOTTOM VIEW 6 10 2.4 ± 0. 0.3 ± 0.05 0.65 0.40 1.60 2.35 3.15 Metal mask pattern SEIKO NPC CORPORATION —18 0.05 M ...
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... Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies. SM8146AD1 SEIKO NPC CORPORATION 15-6, Nihombashi-kabutocho, Chuo-ku, ...