LD8105 LEADTREND | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 8
Technical content
Features
Internal Precision ±1% Voltage Reference Secondary-side Constant Voltage and Constant Current Control Low Quiescent consumption Wide VCC operating range 3V to 38V Max. 40V voltage rating Low external component count SOT-26 Package
Applications
LED Lighting Typical Application DC output IREF OUT VSEN VCC GND ISEN LD8105 1.21V 100mV Fig. 1 Typical Application Circuit -1
Leadtrend Technology Corporation www.leadtrend.com.tw LD8105-DS-00 May 2012 DC output IREF OUT VSEN VCC GND ISEN LD8105 1.21V 100mV Fig. 2 Typical Application Circuit -2 Pin Configuration SOT-26 (TOP VIEW) Y : Year code (D: 2004, E: 2005…..) W : Week code PP : Production code V05 : LD8105 1 2 3 4 5 6 ISEN GND VSEN VCC OUT IREF YWV 05 pp
Ordering Information
Part number Package TOP MARK Shipping LD8105GL SOT-26 YWV/05 3000 /tape & reel The LD8105 is Green Packaged.
Leadtrend Technology Corporation www.leadtrend.com.tw LD8105-DS-00 May 2012 Pin Descriptions PIN NAME FUNCTION 1 ISEN Current sense pin. The inverting input of the current loop op amp. 2 GND Ground. 3 VSEN Voltage sense pin. It can sense the output voltage if connected to the mid-point of the resistor divider. 4 IREF The non-inverting input of the current loop op amp. 5 OUT Common output pin of the two internal op amps.
6 VCC
Supply voltage pin. It is necessary to locate a 0.1F bypass capacitor between VCC and GND. Block Diagram IREF OUT VSEN VCC GND ISEN 1.21V 100mV
Leadtrend Technology Corporation www.leadtrend.com.tw LD8105-DS-00 May 2012 Absolute Maximum Ratings Supply Voltage, Vcc -0.3 ~40V VSEN -0.3~6V ISEN -0.3~6V IREF -0.6~6V OUT -0.3~Vcc Maximum sink current 20mA Maximum Junction Temperature 125C Operating Junction Temperature -40C to 125C Operating Ambient Temperature -40C to 85C Storage Temperature Range -65C to 150C Package Thermal Resistance 250C/W Power Dissipation (At Ambient Temperature = 85C) 160mW Lead temperature (Soldering, 10sec) 260C ESD Voltage Protection, Human Body Model 2 KV ESD Voltage Protection, Machine Model 200 V Caution: Stresses beyond the ratings specified in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Recommended Operating Conditions Item Min. Max. Unit Supply Voltage Vcc 3 38 V
Leadtrend Technology Corporation www.leadtrend.com.tw LD8105-DS-00 May 2012
Electrical Characteristics
(TA = +25C unless otherwise stated, VCC=15.0V) PARAMETER CONDITIONS MIN TYP MAX UNITS Supply Voltage (Vcc Pin) Supply Voltage 3 -- 38 V Quiescent Current ISEN = IREF = 0V, OUT = open -- -- 150 μA Voltage Control Loop (VSEN PIN) Voltage loop reference voltage, VSEN ISEN = IREF = 0V 1.198 1.210 1.222 V ISEN = IREF= 0V, (TA = -20C ~125C) 1.186 -- 1.234 V Voltage Loop Input Bias Current VSEN = 1.18V~1.24V -- -- 20 nA Current Control Loop (IREF Pin) Current loop reference voltage, IREF VSEN = 1.21V 97 100 103 mV Current Loop Input Bias Current IREF= 90mV~110mV -- -- 20 nA Output (Output Pin) Output Low Level @2mA sink current -- 200 400 mV
Leadtrend Technology Corporation www.leadtrend.com.tw LD8105-DS-00 May 2012 Typical Performance Characteristics Quiescent Current (A) Fig. 1 Quiescent Current vs. Temperature Temperature (C) -40 0 60 100 120 80 80 20 -20 Vcc=3V Vcc=15V Low Output Voltage Level (V) Fig. 2 Low Output Voltage Level vs. Temperature Temperature (C) 105 121 -40 0 60 100 120 80 80 20 -20 Vcc=3V Vcc=15V Voltage Loop Reference (V) Fig. 3 Voltage Loop Reference vs. Temperature Temperature (C) 1.19 1.20 1.21 1.22 1.23 -40 0 60 100 120 80 80 20 -20 Vcc=3V Vcc=15V Current Loop Reference (mV) Fig. 4 Current Loop Reference vs. Temperature Temperature (C) 100 101 102 103 -40 0 60 100 120 80 80 20 -20 Vcc=3V Vcc=15V
Leadtrend Technology Corporation www.leadtrend.com.tw LD8105-DS-00 May 2012
Package Information
Symbol Dimension in Millimeters Dimensions in Inches Min Max Min Max A 2.692 3.099 0.106 0.122 B 1.397 1.803 0.055 0.071 D 0.300 0.500 0.012 0.020 F 0.95 BSC. H 0.080 0.254 0.003 0.010 I 0.050 0.150 0.002 0.006 J 2.600 3.000 0.102 0.118 M 0.300 0.600 0.012 0.024 θ 0° 10° 0° 10° Important Notice Leadtrend Technology Corp. reserves the right to make changes or corrections to its products at any time without notice. Cust omers should verify the datasheets are current and complete before placing order.
Leadtrend Technology Corporation www.leadtrend.com.tw LD8105-DS-00 May 2012
Revision History
Rev. Date Change Notice 00 5/29/2012 Original Specification