SM8130

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. FEATURES I PINOUT (Top view) I I I I I I I I I I I 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 CONT 1 ENA 2 C1M 3 VIN 4 C1P 5 10 9 8 7 6 DIN3 DIN2 DIN1 VSS VOUT PACKAGE DIMENSIONS (Unit: mm) APPLICATIONS I I I I I I I I I I I I 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 2.80 ± 0.1 3.00 ± 0.1 0.45TYP 0.125 ± 0.05 2.90 ± 0.1 0.5 ± 0.05 0.05 + 0.1 0.25 − 0.05 ORDERING INFORMATION Device SM8130A50D Package 10-pin SON NIPPON PRECISION CIRCUITS INC.—1 0.03 0.05 M + 0.1 0.80 − 0.05 0.20 ± 0.08 0.20 ± 0.08 SM8130 series BLOCK DIAGRAM VIN VREF AMP Soft Start ENA Driver OSC MOS Switch C1M C1P VOUT CONT Current Limiter Current Control DIN1 DIN2 DIN3 VSS PIN DESCRIPTION Number 1 2 3 4 5 6 7 8 9 10 Name CONT ENA C1M VIN C1P VOUT VSS DIN1 DIN2 DIN3 I/O I Ip*1 – – – O – O O O Description LED driving current control voltage input pin Chip enable (High active) Charge pump capacitor connection pin 1M Power supply Charge pump capacitor connection pin 1P LED driving voltage output pin GND LED driving current control output pin 1 LED driving current control output pin 2 LED driving current control output pin 3 *1. Input with built-in pull-down resistor NIPPON PRECISION CIRCUITS INC.—2 SM8130 series SPECIFICATIONS Absolute Maximum Ratings Parameter Supply voltage range Input voltage range Output voltage range Power dissipation Operating temperature range Storage temperature range Symbol VIN VENA, VCONT VDIN1 to 3 VOUT PD Topr Tstg Rating −0.3 to 6.5 VSS – 0.3 to VIN + 0.3 VSS – 0.3 to VIN + 0.3 6.5 667 (Ta = 25°C)*1 –30 to 85 −55 to 125 Unit V V V V mW °C °C *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 PD = (TMAX − Ta) θJ 800 700 Power dissipation [mW] 667 533 400 600 500 400 300 267 200 100 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 Supply voltage Standby current Quiescent current Output voltage Maximum output current Switching frequency Soft start time Offset current LED current Limit current Leak current Input voltage Pin VIN VIN VIN VOUT VOUT C1M, C1P DIN1 to 3 DIN1 to 3 DIN1 to 3 DIN1 to 3 DIN1 to 3 ENA ENA Input current CONT Symbol VIN ISTB IDD VOUT IOUT fOSC TSS IOFFSET1 to 3 ILED1 to 3 ILIMIT1 to 3 ILEAK VIH VIL IIH ICONTL ICONTH VENA = 3.6V VCONT = 0V VCONT = VIN VCONT = 0V VCONT = 0.5V VCONT = 1.0V VENA = 0V, VDIN1 to 3 = 5.0V VENA = 0V ILOAD = 0mA IOUT = 60mA VOUT = 5.0V Condition min 2.7 – – 4.8 – 450 – – 19.4 27.0 – 1.8 – – – – typ 3.6 0.01 3.5 5.0 – 500 1.0 0.3 20.0 30.0 – – – 10.0 – – max 4.6 1.0 5.0 5.2 100 550 2.0 1.5 20.6 33.0 1.0 – 0.6 20.0 1.0 1.0 V µA mA V mA kHz ms mA mA mA µA V V µA µA µA Unit 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 control voltage input ILED ILED current 30mA Limiter on ILED = VCONT 0.04 [A] 0.75V hys 5mA TYPICAL APPLICATIONS IIN 4.7µF VIN VREF AMP C1M ENA Soft Start MOS Switch Driver OSC C1P 1.0µF DC 2.7 to 4.6V VOUT 4.7µF ILED VCONT CONT Current Control DIN1 DIN2 DIN3 VSS Current Limiter VCONT 0.125V 0.250V 0.375V 0.500V ILED/pcs 5mA/pcs 10mA/pcs 15mA/pcs 20mA/pcs IIN 35mA 65mA 95mA 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: sales@npc.co.jp NC0209AE 2003.09 NIPPON PRECISION CIRCUITS INC.—6