LD8105GL [LEADTREND]

Constant Voltage and Constant Current Controller;


型号：	LD8105GL
厂家：	Leadtrend Technology
描述：	Constant Voltage and Constant Current Controller
文件：	总8页 (文件大小：294K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LD8105

5/29/2012

Constant Voltage and Constant Current Controller

Rev. 00

General Description

Features



Internal Precision ±1% Voltage Reference

The LD8105 is built-in with a high-accuracy 1.2V voltage

reference, two op-amps and a low-side current sensing

circuit in a SOT-26 package. It provides a highly

integrated solution for CV (constant voltage) and CC

(constant current) dual control. The LD8105 is capable to

operate under temperature ranging from -40°C to 105°C.



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

VCC

1.21V

IREF

ISEN

OUT

DC output

100mV

VSEN

LD8105

GND

Fig. 1 Typical Application Circuit -1

Leadtrend Technology Corporation www.leadtrend.com.tw

LD8105-DS-00 May 2012

LD8105

VCC

1.21V

OUT

IREF

ISEN

DC output

100mV

VSEN

LD8105

GND

Fig. 2 Typical Application Circuit -2

Pin Configuration

SOT-26 (TOP VIEW)

VCC OUT

IREF

Year code (D: 2004, E: 2005…..)

Week code

Production code

YWV

V05 : LD8105

ISEN GND VSEN

Ordering Information

Part number

Package

TOP MARK

Shipping

3000 /tape & reel

LD8105GL

SOT-26

YWV/05

The LD8105 is Green Packaged.

Leadtrend Technology Corporation www.leadtrend.com.tw

LD8105-DS-00 May 2012

LD8105

Pin Descriptions

NAME

FUNCTION

Current sense pin. The inverting input of the current loop op amp.

Ground.

ISEN

GND

Voltage sense pin. It can sense the output voltage if connected to the mid-point

of the resistor divider.

VSEN

IREF

OUT

The non-inverting input of the current loop op amp.

Common output pin of the two internal op amps.

Supply voltage pin. It is necessary to locate a 0.1F bypass capacitor between

VCC and GND.

VCC

Block Diagram

VCC

1.21V

OUT

IREF

ISEN

100mV

VSEN

GND

Leadtrend Technology Corporation www.leadtrend.com.tw

LD8105-DS-00 May 2012

LD8105

Absolute Maximum Ratings

Supply Voltage, Vcc

-0.3 ~40V

-0.3~6V

VSEN

ISEN

-0.3~6V

IREF

-0.6~6V

OUT

-0.3~Vcc

20mA

Maximum sink current

Maximum Junction Temperature

Operating Junction Temperature

Operating Ambient Temperature

Storage Temperature Range

Package Thermal Resistance

Power Dissipation (At Ambient Temperature = 85C)

Lead temperature (Soldering, 10sec)

ESD Voltage Protection, Human Body Model

ESD Voltage Protection, Machine Model

125C

-40C to 125C

-40C to 85C

-65C to 150C

250C/W

160mW

260C

2 KV

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

Leadtrend Technology Corporation www.leadtrend.com.tw

LD8105-DS-00 May 2012

LD8105

Electrical Characteristics

(T_A= +25C unless otherwise stated, V_CC=15.0V)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage (Vcc Pin)

Supply Voltage

Quiescent Current

ISEN = IREF = 0V, OUT = open

150

μA

Voltage Control Loop (VSEN PIN)

I_SEN= I_REF= 0V

1.198

1.186

1.210

1.222

1.234

Voltage loop reference voltage, VSEN

I_SEN= I_REF= 0V, (T_A= -20C ~125C)

V_SEN= 1.18V~1.24V

Voltage Loop Input Bias Current

Current Control Loop (IREF Pin)

Current loop reference voltage, IREF

Current Loop Input Bias Current

Output (Output Pin)

V_SEN= 1.21V

100

103

I_REF= 90mV~110mV

Output Low Level

@2mA sink current

200

400

Leadtrend Technology Corporation www.leadtrend.com.tw

LD8105-DS-00 May 2012

LD8105

Typical Performance Characteristics

121

105

Vcc=15V

Vcc=3V

Vcc=15V

-20

-40

100

120

-40

100

120

Temperature (C)

Fig. 1 Quiescent Current vs. Temperature

Fig. 2 Low Output Voltage Level vs. Temperature

1.23

1.22

103

102

Vcc=3V

Vcc=15V

1.21

1.20

1.19

101

100

-20

-40

100

120

-40

100

120

Temperature (C)

Fig. 3 Voltage Loop Reference vs. Temperature

Temperature (C)

Fig. 4 Current Loop Reference vs. Temperature

Leadtrend Technology Corporation www.leadtrend.com.tw

LD8105-DS-00 May 2012

LD8105

Package Information

SOT-26

Dimension in Millimeters

Dimensions in Inches

Symbol

Min

Max

Min

Max

2.692

1.397

-------

0.300

3.099

1.803

1.450

0.500

0.106

0.055

-------

0.012

0.122

0.071

0.057

0.020

0.95 BSC.

0.080

0.050

2.600

0.300

0°

0.254

0.150

3.000

0.600

10°

0.003

0.002

0.102

0.012

0°

0.010

0.006

0.118

0.024

10°

Important Notice

Leadtrend Technology Corp. reserves the right to make changes or corrections to its products at any time without notice. Customers

should verify the datasheets are current and complete before placing order.

Leadtrend Technology Corporation www.leadtrend.com.tw

LD8105-DS-00 May 2012

LD8105

Revision History

Rev. Date

Change Notice

5/29/2012

Original Specification

Leadtrend Technology Corporation www.leadtrend.com.tw

LD8105-DS-00 May 2012

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