LDS8846-002-T2 IXYS, LDS8846-002-T2 Datasheet
LDS8846-002-T2
Specifications of LDS8846-002-T2
Related parts for LDS8846-002-T2
LDS8846-002-T2 Summary of contents
Page 1
... Digital Still Cameras o PDAs and Smartphones o DESCRIPTION The LDS8846 is a high efficiency ultra-low dropout current regulator that can drive up to four LEDs. The TYPICAL APPLICATION CIRCUIT © 2009 IXYS Corp. Characteristics subject to change without notice LED current is easily adjustable by an external resistor per channel ...
Page 2
... LDS8846 ABSOLUTE MAXIMUM RATINGS Parameter V , LEDx voltage IN V voltage OUT EN, CTRL0, CTRL1, CTRL2 voltage Storage Temperature Range Junction Temperature Range Soldering Temperature (10s) ESD protection HBM NOTE: Stresses listed above may cause permanent damage to thje device. Functional operation of the device at these or any other conditio ns beyond those indicated in the “ ...
Page 3
... LDS8846 CONTROL INPUTS FUNCTION Control Inputs CTRL2 CTRL1 CTRL0 LED4 OFF OFF OFF OFF OFF OFF TYPICAL CHARACTERISTICS V = 3.6V 104 mA (4 LEDs each OUT Power Efficiency vs. Input Voltage LED Current vs. Input Voltage © 2009 IXYS Corp. Characteristics subject to change without notice ...
Page 4
... LDS8846 Power-Down Delay Time EN V OUT I LED (4 LEDs) 50 mA/div PWM Mode (10 kHz, 50 Duty Cycle) CRL0 V OUT I LED (4 LEDs) 50 mA/div I Current vs. Duty Cycle LED © 2009 IXYS Corp. Characteristics subject to change without notice PWM Mode (1 kHz, 50 Duty Cycle) CRL0 V OUT I LED (4 LEDs) ...
Page 5
... LDS8846 PIN DESCRIPTION Pin # Name 1 EN Device Enable. 2 CTRL0 Output Control Bit 0 (See Table Control Pin Function) 3 CTRL1 Output Control Bit 1 (See Table Control Pin Function) 4 CTRL2 Output Control Bit 2 (See Table Control Pin Function) 5 ISET LED current setting pin 6 V Output voltage to the LED anodes ...
Page 6
... R value for typical I current is shown at the SET LED table below. © 2009 IXYS Corp. Characteristics subject to change without notice Figure 2. LDS8846 Functional Block Diagram ILED The average current value may be decreased using PWM signal applied to either CTRL0, CTRL1 or ...
Page 7
... Figure 5. Application circuit with one LED Protection Mode The LDS8846 limits output current if V shorted to ground either before or after device start. This is to prevent the device from overload in case of short circuit at the output. Device resumes normal operation after short removed. ...
Page 8
... A copper area matching the TQFN exposed pad (PAD) 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 6. LDS8846 Recommended layout 8 Doc. No. 8846DS, Rev. N1.6 ...
Page 9
... LDS8846 PACKAGE DRAWING AND DIMENSIONS 16-PIN TQFN, 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 © ...
Page 10
... LDS8846 16-PIN TQFN, 4mm x 4mm, 0.65mm PITCH SYMBOL MIN NOM A 0.70 0.75 A1 0.00 0.02 A2 0.178 0.203 b 0.28 0.33 D 3.90 4.00 D1 2.35 2.40 E 3.90 4.00 E1 2.35 2.40 e 0.65 typ L 0.55 0.60 Note: 3. All dimensions are in millimeters 4. Complies with JEDEC Standard MO-220 © 2009 IXYS Corp. ...
Page 11
... The standard lead finish is Matte-Tin. 3) The device used in the above example is a LDS8846 002–T2 ( 3x3 TQFN, Tape & Reel, 32/25/10.5 mA maximum current per LED bank). 4) For additional package and temperature options, please contact your nearest IXYS Corp. Sales office. © 2009 IXYS Corp. ...
Page 12
... LDS8846 Warranty and Use IXYS 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 ...