LDS8621002-T2-960 IXYS, LDS8621002-T2-960 Datasheet

IC LED DRIVER FLASH 16WQFN

LDS8621002-T2-960

Manufacturer Part Number
LDS8621002-T2-960
Description
IC LED DRIVER FLASH 16WQFN
Manufacturer
IXYS
Series
PowerLite™r
Type
Photo Flash LEDr
Datasheet

Specifications of LDS8621002-T2-960

Topology
Linear (LDO), PWM, Switched Capacitor (Charge Pump)
Number Of Outputs
2
Internal Driver
Yes
Type - Primary
Flash/Torch
Frequency
1.1MHz
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
96mA
Internal Switch(s)
Yes
Efficiency
95%
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Other names
LDS8621-002-T2
LDS8621-002-T2-2
LDS8621-002-T2-2
LDS8621002-T2-960-2
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
TYPICAL APPLICATION CIRCUIT
© 2009 IXYS Corp.
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
1
mode and ultra low dropout PowerLite™ Current
Regulator increases device’s efficiency up to 95%.
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 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
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.
external
ceramic
capacitors.
Doc. No. 8621DS, Rev. N1.0
The
multi-

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LDS8621002-T2-960 Summary of contents

Page 1

... LEDs. The inclusion of a 1.33x fractional charge pump TYPICAL APPLICATION CIRCUIT © 2009 IXYS Corp. Characteristics subject to change without notice mode and ultra low dropout PowerLite™ Current Regulator increases device’s efficiency up to 95%. ...

Page 2

... Logic Level Pins Low Thermal Shutdown Thermal Hysteresis, T SD_HS Under Voltage Lockout (UVLO) Threshold Over Voltage Protection PWM frequency PWM duty cycle © 2009 IXYS Corp. Characteristics subject to change without notice Rating Unit 6 V 6.5 V Vin + 0.7V V -65 to +160 °C -40 to +125 ° ...

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 © 2009 IXYS Corp. Characteristics subject to change without notice Function F LEDA and LEDB provide the internal regulated μ ...

Page 4

... F Charge Pump Output Resistance at given mode, Iout is sum of all LED currents, and charge pump’ multiplication ratio. © 2009 IXYS Corp. Characteristics subject to change without notice 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. © 2009 IXYS Corp. Characteristics subject to change without notice 5. Input Voltage Under-Voltage Lockout If V falls below 2.2 V (typical value), LDS8621 IN enters shutdown mode ...

Page 6

... 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 © 2009 IXYS Corp. Characteristics subject to change without notice MAX 0.80 0.05 0.228 0.28 3.10 1.70 3.10 1.70 0.45 6 Doc. No. 8621DS, Rev. N1.0 ...

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 IXYS Corp. Sales office. © 2009 IXYS Corp. Characteristics subject to change without notice Package ...

Page 8

... 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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