LDS8866002-T2-300 IXYS, LDS8866002-T2-300 Datasheet

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LDS8866002-T2-300

Manufacturer Part Number
LDS8866002-T2-300
Description
IC LED DVR WHT/CLR BCKLGT 16WQFN
Manufacturer
IXYS
Series
PowerLite™r
Type
Backlight, White LED, Color LEDr
Datasheet

Specifications of LDS8866002-T2-300

Topology
Linear (LDO), PWM, Switched Capacitor (Charge Pump)
Number Of Outputs
6
Internal Driver
Yes
Type - Primary
Backlight
Type - Secondary
White LED
Frequency
100kHz
Voltage - Supply
2.7 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
16-WQFN Exposed Pad, 16-DQFN
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
32mA
Internal Switch(s)
Yes
Efficiency
94%
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Other names
LDS8866-002-T2
LDS8866-002-T2-2
LDS8866-002-T2-2
LDS8866002-T2-300-2
LDS8866
FEATURES
APPLICATION
DESCRIPTION
The LDS8866 is a high efficiency multi-mode
fractional charge pump with ultra low dropout voltage
that can drive up to six LEDs. Inclusion of a 1.33-x
fractional charge pump mode and ultra low dropout
TYPICAL APPLICATION CIRCUIT
© 2009 IXYS Corp.
Characteristics subject to change without notice
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o Available in 3 x 3 x 0.8 mm 16-pin TQFN
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Charge pump modes: 1-x, 1.33-x, 1.5-x, 2-x
Ultra low dropout PowerLite™ Current
Regulator*
Drives up to 6 LEDs up to 32 mA each
Factory preset current value for each LED
bank
PWM brightness control with up to 25,000:1
dimming range at 200 Hz
Power efficiency up to 94%
Low input noise & ripple in all charge pump
modes
Low current shutdown mode
Short circuit current limiting
Thermal shutdown protection
package
Keypad and Display Backlight
Cellular Phones
Digital Still Cameras
PDAs and Smartphones
6-Channel Ultra Low Dropout LED Driver
1
PowerLite™ Current Regulator (PCR) increases
device’ efficiency up to 94%. New mode requires no
additional external capacitors.
The PWM1/PWM2 logic inputs function as a chip
enable and a PWM mode LED brightness control.
PWM1 pin contorls LEDA and LEDB banks with four
LEDs, while PWM2 controls bank LEDC with two
LEDs.
The maximum LEDs current is factory preset. Every
LED bank with two LEDs each is programmable
separately in the range from 0.5 to 32 mA in 0.5 mA
steps.
Low noise input ripple is achieved by operating at a
constant switching frequency which allows the use of
small
fractional charge pump supports a wide range of
input voltages from 2.7 V to 5.5 V.
The device is available in a 16-lead TQFN 3 mm x
3 mm package with a max height of 0.8 mm.
external
ceramic
capacitors.
Doc. No. 8866DS, Rev. N2.0
The
multi-

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LDS8866002-T2-300 Summary of contents

Page 1

... LEDs. Inclusion of a 1.33-x fractional charge pump mode and ultra low dropout TYPICAL APPLICATION CIRCUIT © 2009 IXYS Corp. Characteristics subject to change without notice PowerLite™ Current Regulator (PCR) increases device’ efficiency up to 94%. New mode requires no additional external capacitors ...

Page 2

... Thermal Shutdown 1 Thermal Hysteresis V Under Voltage Lockout (UVLO Threshold V Over Voltage Protection OUT 1 Sample test only © 2009 IXYS Corp. Characteristics subject to change without notice Rating 0.7V IN -65 to +160 -40 to +125 300 Rating 2.7 to 5.5 - 3.6V, Cin = Cout = 1 µ 0.22 µ High, T ...

Page 3

... PWM pins must be held low for more than 30 ms the charge pump output that is connected to OUT the LED anodes. A small 1μ F ceramic bypass © 2009 IXYS Corp. Characteristics subject to change without notice Function capacitor is required between the V μ F ground near the device ...

Page 4

... Power-Up in 1.33-x Mode Ch1 – PWM1, PWM2, Ch2 – Vout, Ch3 – Output current (100mA/div) Power-Up in 2-x Mode Ch1 – PWM1, PWM2, Ch2 – Vout, Ch3 – Output current (100mA/div) © 2009 IXYS Corp. Characteristics subject to change without notice = 0.22 μ 1μ 25° ...

Page 5

... Ch1 – PWM1, PWM2, Ch2 – Vout, Ch3 – Output current (100mA/div) Operating Waveforms at 50kHz PWM mode Ch1 – PWM1, PWM2, Ch2 – Vout, Ch3 – Output current (100mA/div) © 2009 IXYS Corp. Characteristics subject to change without notice = 0.22 μ 1μ 25° ...

Page 6

... If this voltage falls below 75 mV (typical) at any one channel, (channel with LED with highest forward voltage), the Mode Control Block changes charge pump mode to the next multiplication ratio. © 2009 IXYS Corp. Characteristics subject to change without notice Figure 2. LDS8866 Functional Block Diagram Charge Pump Output Resistance at given mode, Iout is sum of all LED currents, and charge pump’ ...

Page 7

... PWM1/PWM2 inputs, the LDS8866’s maximum input current is determined by the factory preset maximum LED current multiplied by number of LED used, the © 2009 IXYS Corp. Characteristics subject to change without notice The LDS8866’s PWM logic control circuits have been designed to operate from 100 Hz to 100 kHz with duty cycles higher than (0.02*F)% and lower than (100 – ...

Page 8

... A test current is placed in the channel to sense when the channel moves below V – 1.5 V. OUT Figure 4. Application circuit with 5 LEDs © 2009 IXYS Corp. Characteristics subject to change without notice Protection Modes The LDS8866 has follow protection modes 1. LED short ...

Page 9

... A copper area matching the TQFN exposed pad (TAB) must be connected to the ground plane underneath. The use of multiple via improves the package heat dissipation. © 2009 IXYS Corp. Characteristics subject to change without notice Figure 5. Recommended layout 9 Doc. No. 8866DS, Rev. N2.0 ...

Page 10

... 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 IXYS Corp. Characteristics subject to change without notice MAX 0.80 0.05 0.228 0.30 3.05 1.75 3.05 1.75 0.425 10 Doc. No. 8866DS, Rev. N2.0 ...

Page 11

... The device used in the above example is a LDS8866 002–T2 ( 3x3 TQFN, Tape & Reel, 30/25/5 mA maximum current per LED bank). 4) For additional package and temperature options, please contact your nearest IXYS Corp. Sales office. © 2009 IXYS Corp. Characteristics subject to change without notice ...

Page 12

... IXYS Corp. products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the IXYS Corp. product could create a situation where personal injury or death may occur. ...

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