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| www..com Product Brief CP2133 DC/DC Series High Efficiency 1X/1.5X Fractional Charge Pump for White LED OVERVIEW The CP2133 is optimized for white LED supplies in backlight color display applications. The device provides a constant current, set by an external resistor, for each LED. The supply voltage ranges from 2.7 V to 5.5 V and is ideally suited for all applications powered by a single LI-Ion battery cell or three to four NiCd, NiMH, or Alkaline 3mm*3mm QFN 16L -4085 battery cells. The CP2133 provides up to 30 mA per LED, for a total of 120 mA, for input voltage rang from 3 V to 5.5 V. High efficiency is achieved by utilizing a 1x/1.5x adaptive fractional conversion technique in combination with very low dropout current sources. Additionally, the current controlled charge pump ensures low input current ripple and EMI. Only two external 1F and two 0.47 F capacitors are required to build a complete small and low cost power supply solution. The CP2133 switches at 1 MHz operating frequency and is available in a small 16-pin QFN package to keep a minimum board space. FEATURES Drives up to 4 LEDs at 30 mA Each Regulated Output Current With 0.5% Matching Over Temperature LED Brightness Control Through PWM Control Signal0Hz50KHz Low Input Ripple and Low EMI Over-current and Over-temperature Protected Less than 0.1A Quiescent Current In Shutdown Mode RoHS Compliant and 100% Lead (Pb)-Free Pin Diagram (Top View) C2+ C1+ C212 11 10 VIN 9 C1- 13 8 VOUT PGND D1 D2 GND EN1 EN2 14 7 CP2133 15 6 16 5 1 2 3 Copyright (c)2005 Chiphomer Technology Limited 4 D4 NC D3 ISET 1 www..com Product Brief CP2133 DC/DC Series High Efficiency 1X/1.5X Fractional Charge Pump for White LED APPLICATIONS Cell phone Digital Camera MP3,PMP,PDA TYPICAL APPLICATION C2 0.47F C1 0.47F C2VIN EN1 C1- C1+ C2+ VOUT Li-ion Battery + - CIN 1F CP2133 COUT 1F D4 D3 D2 EN2 ISET GND PGND D1 RSET RELATED PRODUCTS CP2130High Efficiency 1X/1.5X Fractional Charge Pump for White LED CP2131High Efficiency 1X/1.5X Fractional Charge Pump for White LED Chiphomer Technology Limited Add: 4F, Building D, 1618 Yishan Road, Shanghai, 201103, P.R.C. Tel: +86-(0)21-64058488, 64014543 Fax: +86-(0)21-64050030 Email: sales@chiphomer.com Web: www.chiphomer.com Shenzhen Office: 10D, Building 2, Dushi Yangguang Garden CheGongMiao, Futian District, Shenzhen, 518048, P.R.C. Tel: +86-(0)755-82046706, 82047789 Fax: +86-(0)755-82046709 Copyright (c)2005 Chiphomer Technology Limited 2 |
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