MT501 Datasheet. Www.s Manuals.com. Mos Tech

User Manual: Marking of electronic components, SMD Codes 2A, 2A*, 2A***, 2A18, 2A20, 2A25, 2A30, 2A35, 2A4, 2A40, 2A45, 2A50, 2A55, 2A60, 2A7, 2AG, 2AL. Datasheets FAN5350UCX, FMMT3906, KST3906, MMBT3906, MMBT3906G-AE3, MMBT3906G-AL3, MMBT3906G-AN3, MMBT3906L-AE3, MMBT3906L-AL3, MMBT3906L-AN3, MT501, PZM2.4NBA, PZM2.7NB2A, Si2302ADS.

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MOS-TECH Semiconductor Co.,LTD


MT501

LOW POWER LIGHTING LED DRIVER DATA SHEET

15 ~ 60mA Single/Dual channel LED Driver
Features
 The most easy used linear constant current LED driver
 15mA~ 60mA, 1 to 2 channel constant current
regulator
 No external current setting resistor is needed
 1.5V ~ 12V wide supply voltage range supports self
power structure in lighting application
 Very low dropout voltage
IPN ≦ 40mA → VPN ≒ 0.4V
IPN > 40mA → VPN ≒ 0.6V
 PWM dimming by VDD pin
 2uS/2uS current rising/falling time
 -40℃ ~ 120℃ junction operating temperature
 Cascade-able for higher voltage applications*
( type 1Axx only)
 Current leak/no leak design for lighting/display
Application
 Low chip to chip current skew
IPN ≦ 40mA → chip current skew < ±5%
IPN > 40mA → chip current skew < ±6%
 Less than 1%/V load (or line) regulation
 Minimized footprint
 Green package
*
Patent pending

can be connected in series to share redundant high voltage.
With the unique share voltage technology of MOS-TECH
Semiconductor, the extra redundant voltage can be shared
by each MT501 by a reasonable mechanism. This special
capability let MT501 very suit for the usage of wide range
power supply that many liner type LED drivers cannot work.

Product Description
MT501 is a simple general purpose current regulation
component that can be easily used in various LED lighting
applications. With the excellent load/line regulation and
minimized chip current skew, MT501 keep LED’s current
very stable even when power or load fluctuate in a wide
range and make light intensity very uniform in large area of
LED light source.
Except power supply function, the VDD pin of MT501 is
output enable (OE) also, and can be used in digital PWM
controlled circuit to achieve more precise current adjusting
in gray level applications.
The minimized power supply voltage let MT501 be used
as a current regulative diode (CRD) when VDD and VP pin
are tight together. This application makes MT501 very easy
to be used. Just like a diode, when this diode is inserted in
LED series, the current in circuit is regulated.
In high supply voltage and low LED load voltage
applications, two or more single channel MT501 (A type)



Applications
Type A – For lighting application
 General LED lighting
 LCD back lighting
 LED torch / flashlight
 RGB lighting
Type B – For display application (No current leak)
 RGB display pixel driver
Package Type
 SOT 23-3 (single channel, type A/B)

VN

VN

1AXX

1BXX

VP

VDD

VP

VDD

SOT23-5 (dual channel, type A) – two independent
driver in single package.

VDD1

VDD2

2AXX
VP1


VN VP2

SOT89-3 (single channel, type A, package option)

1AXX
XXXX
VP

VN

VDD

Terminal Description
Pin Name

Function

VDD

Power supply

VP

Current in

VN

Current out

Ordering Information
Part Number: MT501

Example: “1A25” is single channel cascade-able MT501, current 25mA.
“1B25” is single channel NU501, current 25mA
“2A20” is dual channel NU501, current 20mA.
PS: Before you issue your P.O., please contact your agent or
MOS-TECH Semiconductor to make sure the channel and center current
that is available.

Top marking

x A xx
Channels

Output current (mA)

Product type

Block Diagram per channel and Ideal IV characteristic

VDD

Ipn

Vp

Type A – IV curve

Type B – IV curve

Ip

Ip

Vrefence

Iboost
Is

Is

Vt

Vn

Viboost

Vt

Vp

Vp

Maximum Ratings (T = 25°C)
Characteristic

Symbol

Rating

Unit

Supply voltage

VDD

0 ~ 16

V

Output voltage

VP

-0.2 ~ 17

V

Output current

IPN

Power Dissipation (Ta=25°C)
Thermal Resistance (On PCB, Ta=25°C)

PD
RTH(j-a)

IS**

+10%

SOT 23

0.25

SOT 89

0.7

SOT 23

300

SOT 89

180

mA
W
°C /W

Operating temperature

TOPR

-40~+85

°C

Storage temperature

TSTG

-55~+150

°C

Electrical Characteristics and Recommended Operating Conditions
Characteristic

Symbol

Supply voltage

VDD

Room Temp.
VPN >= 1V

Min.

Typ.

Max.

IS <= 25mA

1.5

-

12

IS <= 40mA

2

-

12

IS > 40mA

2.5

-

12

Unit
V

Supply current

IDD

-

100

150

250

uA

Minimum dropout voltage

VPNmin

VDD >=3.8V

0.4

-

0.6

V

Maximum output voltage

VPNmax

IPN = IS

-

-

0.25 / IPN

V

Output breakdown voltage

VPNBD

IPN = 0, VDD = 0V

-

-

17

V

Output current

IS

Spec.

15

-

60

mA

Leakage

ILeakage

Type A

1

-

5

uA

Type B

0

-

0.5

Line regulation

%/VDD

12V > VDD > 1.6V

-

-

Load regulation

%/VP

8V > VP > 1.6V

-

-

VDD = VP = 2V

-

-

±1
±1
±0.5

uA

%/10

Thermal regulation

**

Condition

0V < VDD < 0.4V,
VP = 10V

℃

%/V
%/V

℃

%/10

Threshold voltage (Type A only)

Viboost

IP = IS*1.1

11

12

13

V

Current boost (Type A only)

Iboost

VP = Viboost

7

10

13

% * IS

Chip current skew

ISkew

IPN <= 40mA

-

-

5

IPN > 40mA

-

-

6

VDD = VP = 2V

%

IS is output saturation current.

Switching Characteristics (T = 25°°C)
Characteristic

Symbol

Condition

Min.

Typ.

Max.

Unit

Propagation Delay Time
VDD from “L” to “H”

tpLH

VP=1V, VDD = 0V → 3V

-

1

-

uS

Output current rising time

tRise

VP=1V, VDD = 0V → 3V

-

1.5

5

uS

Propagation Delay Time
VDD from “H” to “L”

tpHL

VP=1V, VDD = 3V → 0V

-

1

-

uS

Output current falling time

tFall

VP=1V, VDD = 3V → 0V

-

1.5

5

uS

Test Circuit

+V

RLoad
VDD
Function
generator

VP

MT501
VN

Timing Waveform

VDD

50%

50%

tpLH

tpHL
90%
50%
10%

VP

90%
50%
10%

tRise

tFall

I/V curve

Load regulation characteristic (A type)
VDD

70.00

VDD

VP

MT501
VN

VN

Output current IPN (mA)

VP

1A60
1A55
1A50

60.00
50.00

1A45
1A40

40.00
1A30
1A25

30.00
20.00

1A35

1A20
1A18

10.00

VDD = 3.8V
0.1
0.5
1
1.8
2.6
3.4
4.2
5
5.8
6.6
7.4
8.2
9
9.8
10.6
11.4
12.2
13
13.8
14.6
15.4
16.2
17

0.00

Output voltage VPN (V)

VDD

VP

VDD

VP

MT501
VN

VN

Output current IPN (mA)

Load regulation characteristic (B type)

1B30
1B25

VDD = 3.8V

Output voltage VPN (V)

Line regulation characteristic
70.0
1A60

Output current IPN (mA)

60.0

1A55
1A50

50.0

1A45
1A40
1A35

40.0
30.0

1A30
1A25

20.0

1A20
1A18

10.0

VPN = 1V

0.0
0.9

1.4

1.9

2.4

2.9

3.5

4.4

5.2

6.2

7.2

8.2

9.2

Supply voltage VDD (V)

IDD Vs. Temperature Characteristic

VDD= 5V
VPN = 2V

IDD (uA)

IDD (uA)

IDD Vs. VDD Characteristic (Room Temp)

Supply voltage VDD (V)

°

Temperature ( C)

Application design consideration
MT501 is a linear constant current driver. While this device is designed in lighting system, the heat generation should be
considered. Generally, the higher current designed in system, the higher power will suffer by this
power consuming by MT501 and to increase the whole system efficiency, the drop voltage across
minimized. The following design note can reduce the heat generation from
output constant current and the needed supply voltage (normal operation condition).
1. Drop the power supply voltage as low as possible in the normal operation condition.
2. Get the LEDs in current loop as many as possible in the normal operation condition.
3. Get a voltage sharing resistor in series in current loop .
4. If system power is greater that 24V, it suggests to connect a small SMD type capacitor (0.1uF~10uF) between VDD and
VN pin. That will greatly improve the stability of system.

Application Circuits
 Parallel application

 5V PWM indicator application
+5V

VDD

VP

MT501

PWM
generator

1B20

12V

VN

VDD

VDD

VP

VP

MT501

MT501
VN

VN

 24V PWM lighting with dimming application
With the special designed character of leak, the A type
NU501 can be used in dimming application even when
system power is higher than the maximum VP voltage.
 RGB display pixel application
+24V

+5V

PWM
generator

PWM R
VDD

PWM
generator

PWM G
VP

VP

RGB PWM signal

MT501
1A20

VN

 12V lighting application

12V

VP

MT501

MT501
VP1

VN

VN

VN

VN

 High voltage drop application

VDD

VP

MT501
1AXX

VN

8V ~ 24V
VDD

VP

MT501
1AXX

VN

1B20

PWM R
VDD

VN

1B20

PWM G

VP

VDD

PWM B

VP

VDD

VP

MT501

MT501

MT501

VN

VN

VN

1B20

1B20

1B20

PWM G

VP

VDD

PWM B

VP

VDD

MT501

MT501

MT501

VN

VN

VN

1B20

VP2

VP

MT501

VDD

VDD1 VDD2

VDD

MT501

PWM R

12V

VDD

PWM B
VP

MT501
1B20

VDD

VDD

1B20

1B20

VP

 36V light tube application

LED Vf = 3.3V ~ 3.5V
VLED = 35.5V ~ 40V

Package Dimensions
 SOT23-3

Taping Specification
PACKAGE

Q’TY/REEL

SOT23-3

3,000 ea

SOT23-5

3,000 ea

SOP89

1,000 ea

 SOT23-5

 SOT89

MOS-TECH Semiconductor Co.,LTD


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೼ᴀ݀ৌ㾘ᅮⱘֱ䆕㣗ೈ‫ݙ‬Փ⫼DŽབᵰ䍙ߎњᴀ݀ৌ㾘ᅮⱘֱ䆕㣗ೈՓ⫼ᯊˈᇍѢ⬅ℸ㗠䗴៤ⱘᬙ䱰੠ߎ⦄
ⱘџᬙˈᴀ݀ৌᇚϡᡓᢙӏԩ䋷ӏDŽ
10.ᴀ݀ৌϔⳈ㟈࡯Ѣᦤ催ѻકⱘ䋼䞣੠ৃ䴴ᗻˈԚϔ㠀ᴹ䇈ˈञᇐԧѻકᘏӮҹϔᅮⱘὖ⥛থ⫳ᬙ䱰ǃ៪㗙⬅
ѢՓ⫼ᴵӊϡৠ㗠ߎ⦄䫭䇃䖤㸠ㄝDŽЎњ䙓‫ܡ‬಴ᴀ݀ৌⱘѻકথ⫳ᬙ䱰៪㗙䫭䇃䖤㸠㗠ᇐ㟈Ҏ䑿џᬙ੠☿♒
៪䗴៤⼒Ӯᗻⱘᤳ༅ˈᏠᳯᅶ᠋㛑㞾㸠䋳䋷䖯㸠‫ݫ‬ԭ䆒䅵ǃ䞛পᓊ⚻ᇍㄪঞ䖯㸠䰆ℶ䫭䇃䖤㸠ㄝⱘᅝܼ䆒䅵
˄ࣙᣀ⹀ӊ੠䕃ӊϸᮍ䴶ⱘ䆒䅵˅ҹঞ㗕࣪໘⧚ㄝˈ䖭ᰃ԰Ўᴎ఼੠㋏㒳ⱘߎॖֱ䆕DŽ⡍߿ᰃऩ⠛ᴎⱘ䕃ӊˈ
⬅Ѣऩ⣀䖯㸠偠䆕ᕜೄ䲒ˈ᠔ҹ㽕∖೼乒ᅶࠊ䗴ⱘ᳔㒜ⱘᴎ఼ঞ㋏㒳Ϟ䖯㸠ᅝܼẔ偠Ꮉ԰DŽ
11. བᵰᡞᴀ䌘᭭᠔䆄䕑ⱘѻકҢ݊䕑ԧ䆒໛Ϟौϟˈ᳝ৃ㛑䗴៤၈‫ܓ‬䇃৲ⱘॅ䰽DŽ乒ᅶ೼ᇚᴀ݀ৌѻકᅝ㺙ࠄ
乒ᅶⱘ䆒໛Ϟᯊˈ䇋乒ᅶ㞾㸠䋳䋷ᇚᴀ݀ৌѻક䆒㕂Ўϡᆍᯧ࠹㨑ⱘᅝܼ䆒䅵DŽབᵰҢ乒ᅶⱘ䆒໛Ϟ࠹㨑㗠
䗴៤џᬙᯊˈᴀ݀ৌᇚϡᡓᢙӏԩ䋷ӏDŽ
12.೼᳾ᕫࠄᴀ݀ৌⱘџ‫ܜ‬к䴶䅸ৃᯊˈϡৃᇚᴀ䌘᭭ⱘϔ䚼ߚ៪㗙ܼ䚼䕀䕑៪㗙໡ࠊDŽ
13.བᵰ䳔㽕њ㾷݇Ѣᴀ䌘᭭ⱘ䆺㒚‫ݙ‬ᆍˈ៪㗙᳝݊Ҫ݇ᖗⱘ䯂乬ˈ䇋৥ᴀ݀ৌⱘ㧹Ϯにষ੼䆶DŽ

Keep safety first in your circuit designs!
1. MOS-TECH Semiconductor Corp. puts the maximum effort into making semiconductor products better
and more reliable, but there is always the possibility that trouble may occur with them. Trouble with
semiconductors may lead to personal injury, fire or property damage.
Remember to give due consideration to safety when making your circuit designs, with appropriate
measures such as (i) placement of substitutive, auxiliary circuits, (ii) use of nonflammable material or
(iii) prevention against any malfunction or mishap.

©2010 MOS-TECH Semiconductor Corporation

www.mtsemi.com

www.s-manuals.com



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