LDS8869 IXYS Corporation, LDS8869 Datasheet
LDS8869
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LDS8869 Summary of contents
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... PDAs and Smartphones o DESCRIPTION The LDS8869 is a high efficiency multi-mode fractional charge pump with ultra low dropout voltage that can drive up to six LEDs. Inclusion of a 1.33x fractional charge pump mode and ultra low dropout PowerLite™ Current Regulator (PCR) increases TYPICAL APPLICATION CIRCUIT © ...
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... LDS8869 ABSOLUTE MAXIMUM RATINGS Parameter V , LEDx, C1±, C2± voltage IN V voltage OUT EN/SET voltage Storage Temperature Range Junction Temperature Range Soldering Temperature RECOMMENDED OPERATING CONDITIONS Parameter V IN Ambient Temperature Range Typical application circuit with external components is shown on page 1. ELECTRICAL OPERATING CHARACTERISTICS (Over recommended operating conditions unless specified otherwise) Vin = 3.6V 0.22 µ ...
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... LDS8869 RECOMMENDED EN/SET TIMING For 2.5 VIN 5.5V, over full ambient temperature range -40 to +85ºC. Symbol Name t EN/SET setup from shutdown SETUP t EN/SET program low time LO t EN/SET program high time HI t EN/SET low time to shutdown OFF t EN/SET Delay to DATA DATADELAY t EN/SET Delay High to ADDRESS RESETDELAY Figure 1 ...
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... LDS8869 Table 3. REG2-5 Current Setting Registers Data Reg2-5 value LED Current, Pulses (binary) mA, IMODE = 0 0 000000 0.0 1 111111 3.75 2 111110 3.5 3 111101 3.25 4 111100 3 5 111011 2.75 6 111010 2.5 7 111001 2.25 8 111000 2 9 110111 1.75 10 110110 1.5 11 110101 1.25 12 110100 1 13 110011 0.75 14 110010 0.5 15 110001 0.25 16 110000 0.0 17 101111 18 101110 19 101101 20 101100 21 101011 22 101010 ...
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... LDS8869 PROGRAMMING EXAMPLES Programming 6 LEDs to 32mA Programming 6 LED to 1mA © 2009 IXIS Corp. Characteristics subject to change without notice 5 Doc. No. 8869_DS, Rev. N2.1 ...
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... LDS8869 TYPICAL CHARACTERISTICS Vin = 3.6V 120mA (6 LEDs at 20mA), C OUT Efficiency vs. Input Voltage Power-Up in 1.33x Mode EN/SET V OUT ILED 100mA/div Power- Mode EN/SET V OUT ILED 100mA/div © 2009 IXIS Corp. Characteristics subject to change without notice = 0.22 μ 1μ 25°C unless otherwise specified ...
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... LDS8869 Operating Waveforms in 1x Mode OUT ILED 100mA/div Operating Waveforms in 1.5x Mode OUT ILED 100mA/div © 2009 IXIS Corp. Characteristics subject to change without notice Operating Waveforms in 1.33x Mode OUT ILED 100mA/div Operating Waveforms in 2x Mode OUT ILED 100mA/div 7 Doc ...
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... LDS8869 PIN DESCRIPTION Pin # Name 1 LEDC2 LEDC2 cathode terminal 2 LEDC1 LEDC1 cathode terminal 3 LEDB2 LEDB2 cathode terminal 4 LEDB1 LEDB1 cathode terminal 5 LEDA2 LEDA2 cathode terminal 6 LEDA1 LEDA1 cathode terminal 7 V Charge pump output connected to the LED anodes OUT 8 V Charge pump input, connect to battery or supply ...
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... Vd ≤75 mV, and the regulated currents cannot be maintained, the low dropout PowerLite™ Current © 2009 IXIS Corp. Characteristics subject to change without notice Figure 2. LDS8869 Functional Block Diagram Regulator switches the charge pump into 1.33x mode (after a fixed delay time of about 800 mode, approximately equal to 1 ...
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... A test current is placed in the channel to sense when the channel moves below V Protection Modes The LDS8869 has follow protection modes: Figure 3. Application circuit with 5 LEDs 1. LED short LED pin is shorted to V becomes as short circuit, or LED pin voltage is within ...
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... The LDS8869 requires restart after die temperature falls below 130°C. 5. Input Voltage Under-Voltage Lockout If V falls below 2.2 V (typical value), LDS8869 IN enters shutdown mode and all registers data are cleared. Device requires restart when input voltage rises above 2 restart device, set EN/SET pin ...
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... LDS8869 PACKAGE DRAWING AND DIMENSIONS 16-PIN TQFN (HV3), 3mm x 3mm, 0.5mm PITCH SYMBOL MIN NOM A 0.70 0.75 A1 0.00 0.02 A2 0.178 0.203 b 0.20 0.25 D 2.95 3.00 D1 1.65 1.70 E 2.95 3.00 E1 1.65 1.70 e 0.50 typ L 0.325 0.375 m 0.150 typ n 0.225 typ Note: 1. All dimensions are in millimeters 2. Complies with JEDEC Standard MO-220 © 2009 IXIS Corp. ...
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... All packages are RoHS-compliant (Lead-free, Halogen-free). 2) The standard lead finish is Matte-Tin. 3) The device used in the above example is a LDS8869 002–T2 ( 3x3 TQFN, Tape & Reel). 4) For additional package and temperature options, please contact your nearest IXIS Corp. Sales office. © 2009 IXIS Corp. ...
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... LDS8869 Warranty and Use IXIS CORP. MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES ...