SM8130 series White LED Driver IC OVERVIEW The SM8130 series are a doubler charge pump DC/DC converter with built-in constant current circuit (independent 3ch). Stable output supply can be realized by an input series regulator and an output side charge pump. 1 to 3 lights of white LED connected in parallel can be lighted. Current variation among LED is reduced due to the independent 3ch constant circuit. Current value sent to white LED can be set by supply level of CONT pin. In addition, brightness can also be adjusted by controlling of CONT pin supply. PINOUT FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 1 to 3 lights of white LED (connected in parallel) lighted Output current value can be set by CONT pin supply (0.25V: 10mA/pcs, 0.50V: 20mA/pcs) Brightness adjustable by controlling of CONT pin supply Current variation among LED decreased by high precision LED current regulation function for LED protection from excess current (ILIMIT1 to 3 = 30mA ± 10%) Input voltage range: 2.7 to 4.6V Output voltage: 5.0V (typ) Quiescent current: 3.5mA (typ) Standby current: 1.0µA (max) Switching frequency: 500kHz (typ) LED current accuracy: 20mA ± 3% (VCONT = 0.50V) Package: 10-pin SON (Top view) CONT 1 10 DIN3 ENA 2 9 DIN2 C1M 3 8 DIN1 VIN 4 7 VSS C1P 5 6 VOUT PACKAGE DIMENSIONS (Unit: mm) ■ ■ ■ ■ ■ ■ ■ ■ 0.20 ± 0.08 3.00 ± 0.1 0.45TYP 0.5 ± 0.05 2.90 ± 0.1 0.05 + 0.1 0.25 − 0.05 0.20 ± 0.08 ■ + 0.1 0.80 − 0.05 ■ Cellular phone Pager Digital still camera Handy terminal PDAs Portable games White LED driving Smart card reader USB port Li-ion battery backup supply PCMCIA local 5V supply Local 3V to 5V conversion 0.03 ■ 0.125 ± 0.05 ■ 2.80 ± 0.1 APPLICATIONS 0.05 M ORDERING INFORMATION Device Package SM8130A50D 10-pin SON NIPPON PRECISION CIRCUITS INC.—1 SM8130 series BLOCK DIAGRAM VIN VREF AMP C1M Soft Start ENA MOS Switch Driver OSC C1P VOUT CONT DIN1 Current Control Current Limiter VSS DIN2 DIN3 PIN DESCRIPTION Number Name I/O Description 1 CONT I 2 ENA Ip*1 3 C1M – Charge pump capacitor connection pin 1M 4 VIN – Power supply 5 C1P – Charge pump capacitor connection pin 1P 6 VOUT O LED driving voltage output pin 7 VSS – GND 8 DIN1 O LED driving current control output pin 1 9 DIN2 O LED driving current control output pin 2 10 DIN3 O LED driving current control output pin 3 LED driving current control voltage input pin Chip enable (High active) *1. Input with built-in pull-down resistor NIPPON PRECISION CIRCUITS INC.—2 SM8130 series SPECIFICATIONS Absolute Maximum Ratings Parameter Symbol Rating Unit VIN −0.3 to 6.5 V VENA, VCONT VSS – 0.3 to VIN + 0.3 V VDIN1 to 3 VSS – 0.3 to VIN + 0.3 V VOUT 6.5 V Power dissipation PD 667 (Ta = 25°C)*1 mW Operating temperature range Topr –30 to 85 °C Storage temperature range Tstg −55 to 125 °C Supply voltage range Input voltage range Output voltage range *1.When mounted on a 23 × 32 × 1.6mm glass-epoxy substrate, the relation of power dissipation and operating temperature see below. Power dissipation: PD [mW] Maximum junction temperature: TMAX = 125°C Operating temperature: Ta [°C] Thermal resistance: θJ = 150°C/W (TMAX − Ta) θJ PD = 800 667 700 Power dissipation [mW] • • • • 600 533 500 400 400 300 267 200 100 0 25 35 45 55 65 75 85 Operating temperature [°C] NIPPON PRECISION CIRCUITS INC.—3 SM8130 series Electrical Characteristics VIN = 3.6V, VSS = 0V, Ta = 25°C unless otherwise noted Rating Parameter Pin Symbol Condition Unit min typ max 2.7 3.6 4.6 V Supply voltage VIN VIN Standby current VIN ISTB VENA = 0V – 0.01 1.0 µA Quiescent current VIN IDD ILOAD = 0mA – 3.5 5.0 mA Output voltage VOUT VOUT IOUT = 60mA 4.8 5.0 5.2 V Maximum output current VOUT IOUT VOUT = 5.0V – – 100 mA Switching frequency C1M, C1P fOSC 450 500 550 kHz Soft start time DIN1 to 3 TSS – 1.0 2.0 ms Offset current DIN1 to 3 IOFFSET1 to 3 – 0.3 1.5 mA LED current DIN1 to 3 ILED1 to 3 VCONT = 0.5V 19.4 20.0 20.6 mA Limit current DIN1 to 3 ILIMIT1 to 3 VCONT = 1.0V 27.0 30.0 33.0 mA Leak current DIN1 to 3 ILEAK – – 1.0 µA – – V ENA VIH 1.8 Input voltage VIL – – 0.6 V ENA Input current CONT VCONT = 0V VENA = 0V, VDIN1 to 3 = 5.0V IIH VENA = 3.6V – 10.0 20.0 µA ICONTL VCONT = 0V – – 1.0 µA ICONTH VCONT = VIN – – 1.0 µA NIPPON PRECISION CIRCUITS INC.—4 SM8130 series FUNCTIONAL DESCRIPTION LED driving current is able to control by regulating CONT pin input voltage. The relation between VCONT and ILED is ILED [A] = 0.04 × VCONT [V]. If CONT pin input voltage is over the limit value, the LED current limiter turns on to keep ILED at a constant limit current. By the CONT input hysteresis, VCONT – ILED relation has a discontinuity area at limiter turning off. VCONT ILED ILED control voltage input ILED current 0.75V 30mA Limiter on hys 5mA ILED = VCONT 0.04 [A] TYPICAL APPLICATIONS IIN VIN 4.7µF VREF AMP C1M Soft Start ENA DC 2.7 to 4.6V MOS Switch Driver 1.0µF C1P OSC VOUT 4.7µF ILED VCONT DIN1 CONT VSS Current Limiter Current Control DIN2 DIN3 VCONT ILED/pcs IIN 0.125V 5mA/pcs 35mA 0.250V 10mA/pcs 65mA 0.375V 15mA/pcs 95mA 0.500V 20mA/pcs 125mA NIPPON PRECISION CIRCUITS INC.—5 SM8130 series Please pay your attention to the following points at time of using the products shown in this document. The products shown in this document (hereinafter “Products”) are not intended to be used for the apparatus that exerts harmful influence on human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such use from NIPPON PRECISION CIRCUITS INC. (hereinafter “NPC”). Customers shall be solely responsible for, and indemnify and hold NPC free and harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties. Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document. Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products, and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or modification. 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. 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: [email protected] NC0209AE 2003.09 NIPPON PRECISION CIRCUITS INC.—6