LDS8621002-T2-960/960 Leadis Technology, LDS8621002-T2-960/960 Datasheet

LED Drivers 200mA Dual Output w/ PWM intereface

LDS8621002-T2-960/960

Manufacturer Part Number
LDS8621002-T2-960/960
Description
LED Drivers 200mA Dual Output w/ PWM intereface
Manufacturer
Leadis Technology
Datasheet

Specifications of LDS8621002-T2-960/960

Low Level Output Current
0 mA
High Level Output Current
192 mA
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
TQFN-16
Minimum Operating Temperature
- 45 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
LDS8621
FEATURES
APPLICATION
DESCRIPTION
The LDS8621 is a high efficiency multi-mode
fractional charge pump with ultra low feedback
voltage that can drive up to two high-current LEDs.
The inclusion of a 1.33x fractional charge pump
mode and ultra low dropout PowerLite™ Current
TYPICAL APPLICATION CIRCUIT
© 2008 Leadis Technology
Characteristics subject to change without notice
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o Tiny 3 x 3 x 0.8 mm 16-pin TQFN package
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Multi-mode charge pump: 1x, 1.33x, 1.5x, 2x
Ultra low dropout PowerLite™ Current
Regulator*
Drives two high-current LEDs up to 96 mA
each
PWM brightness control
Power efficiency up to 95%
Low noise input ripple in all modes
Low current shutdown mode
Soft start and current limiting
Short circuit protection
Thermal shutdown protection
LED Light Supply for Smart Phones, PDAs,
and Cell Phones
LED Flashlights
LED Flash/Strobe Applications
200 mA, Dual Output LED Flash/Lamp Driver
LEADIS TECHNOLOGY CONFIDENTIAL
PRELIMINARY
1
Regulator increases device’s efficiency up to 95%.
New mode
capacitors.
The PWM1/PWM2 logic inputs function as a chip
enable and a PWM mode LED brightness control.
PWM1 pin controls LED A, while PWM2 controls
bank LED B.
The maximum LEDs current value is factory
preset to 96 mA. Other current values are
available upon request. Each LED may be
programmed separately.
Low noise input ripple is achieved by operating at
a constant switching frequency which allows the
use of small external ceramic capacitors. The
multi-fractional charge pump supports a wide
range of input voltages from 2.7V to 5.5V.
The device is available in in 16-lead TQFN 3mm x
3mm package with a max height of 0.8mm.
requires
no
Doc. No. 8621DS, Rev. 0.2
additional
external

Related parts for LDS8621002-T2-960/960

LDS8621002-T2-960/960 Summary of contents

Page 1

... LEDs. The inclusion of a 1.33x fractional charge pump mode and ultra low dropout PowerLite™ Current TYPICAL APPLICATION CIRCUIT © 2008 Leadis Technology Characteristics subject to change without notice PRELIMINARY Regulator increases device’s efficiency up to 95%. ...

Page 2

... Pins Low Thermal Shutdown Thermal Hysteresis, T SD_HS Under Voltage Lockout (UVLO) Threshold Over Voltage Protection PWM frequency PWM duty cycle © 2008 Leadis Technology Characteristics subject to change without notice PRELIMINARY Rating 6 6.5 Vin + 0.7V -65 to +160 -40 to +125 300 Rating 2.7 to 5.5 ...

Page 3

... The pin must be connected to the ground plane on the PCB. C1+, C1- are connected to each side of the ceramic bucket capacitor C1 C2+, C2- are connected to each side of the ceramic bucket capacitor C2 © 2008 Leadis Technology Characteristics subject to change without notice PRELIMINARY Function F LEDA and LEDB provide the internal regulated μ ...

Page 4

... IN F Charge Pump Output Resistance at given mode, Iout is sum of all LED currents, and charge pump’ multiplication ratio. © 2008 Leadis Technology Characteristics subject to change without notice PRELIMINARY Figure 2. LDS8621 Functional Block Diagram If the input voltage is insufficient or falls to a level where Vd ≤50 mV, and the regulated currents cannot be maintained, the low dropout PowerLite™ ...

Page 5

... Over-Temperature Protection If the die temperature exceeds +150°C, the driver will enter shutdown mode. The LDS8621 requires restart after die temperature falls below 130°C. © 2008 Leadis Technology Characteristics subject to change without notice PRELIMINARY 5. Input Voltage Under-Voltage Lockout If V falls below 2 ...

Page 6

... E 2.90 3.00 E1 1.40 1.55 e 0.50 typ L 0.35 0.40 Note: 1. All dimensions are in millimeters 2. Complies with JEDEC Standard MO-220 © 2008 Leadis Technology Characteristics subject to change without notice PRELIMINARY MAX 0.80 0.05 0.228 0.28 3.10 1.70 3.10 1.70 0.45 6 Doc. No. 8621DS, Rev. 0.2 ...

Page 7

... The standard lead finish is Matte-Tin. 3) The device used in the above example is a LDS8621 002–T2 ( 3x3 TQFN, Tape & Reel). 4) For additional package and temperature options, please contact your nearest Leadis Technology Sales office. © 2008 Leadis Technology Characteristics subject to change without notice PRELIMINARY ...

Page 8

... Leadis Technology 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 Leadis Technology product could create a situation where personal injury or death may occur. Leadis Technology reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled " ...

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