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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LOW POWER LIGHTING LED DRIVER DATA SHEET MT501

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

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)

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.

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)

- SOT23-5 (dual channel, type A) – two independent

driver in single package.

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

VN

VP

1 A X X

VN

VP

1 B X X

VDD

VDD

VN

VP1

2 A X X

VDD1 VDD2

VP2

VN

VP VDD

MOS-TECH Semiconductor Co.,LTD

  

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.

Block Diagram per channel and Ideal IV characteristic

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

IS** +10%

mA

Power Dissipation (Ta=25°C)

PD

SOT 23

0.25

W

SOT 89

0.7

Thermal Resistance (On PCB, Ta=25°C)

RTH(j-a)

SOT 23

300

°C /W

SOT 89

180

Operating temperature

TOPR

-40~+85

°C

Storage temperature

TSTG

-55~+150

°C

x A xx

Channels

Product type

Output current (mA)

Top marking

Type A – IV curve Type B – IV curve

Electrical Characteristics and Recommended Operating Conditions

** IS is output saturation current.

Switching Characteristics (T = 25°

°°

°C)

Test Circuit

Characteristic Symbol Condition Min. Typ. Max. Unit

Supply voltage VDD

Room Temp.

VPN >= 1V

IS <= 25mA 1.5 - 12

V IS <= 40mA 2 - 12

IS > 40mA 2.5 - 12

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

0V < VDD < 0.4V,

VP = 10V

Type A 1 - 5 uA

Type B 0 - 0.5 uA

Line regulation %/VDD 12V > VDD

> 1.6V - - 1 %/V

Load regulation %/VP 8V > VP > 1.6V - - 1 %/V

Thermal regulation %/10 VDD = VP = 2V - - 0.5 %/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 VDD = VP = 2V IPN <= 40mA - - 5 %

IPN > 40mA - - 6

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

VDD

Function

generator

+V

VP

VN

RLoad

MT501

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

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

Timing Waveform

I/V curve

V

DD

V

N

V

P

V

P

V

N

VDD

tpHL

50%

90%

90%

50% 10%

VDD

VP

50% 50%

tpLH

tRise tFall

10%

V

DD

V

N

V

P

V

P

V

N

VDD

Load regulation characteristic (B type)

Output voltage VPN (V)

Output current IPN (mA)

1B25

1B30

VDD = 3.8V

Load regulation characteristic (A type)

Output voltage VPN (V)

Output current IPN (mA)

VDD = 3.8V

1A18

1A20

1A25

1A30 1A35

1A40

1A55

1A45

1A50

1A60

MT501

MT501

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

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 (uA)

I

DD

Vs. V

DD

Characteristic (Room Temp)

Temperature ( C)

IDD (uA)

IDD Vs. Temperature Characteristic

VDD= 5V

V

PN

= 2V

Supply voltage VDD (V)

Output current IPN (mA)

Line regulation characteristic

1A18

1A20

1A25

1A30

1A35

1A45

1A40

VPN = 1V

1A50

1A55

1A60

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

 5V PWM indicator application

 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.

 12V lighting application

 High voltage drop application

 Parallel application

 RGB display pixel application

1AXX

V

DD

V

P

V

N

8V ~ 24V

1AXX

VP

V

DD

VN

PWM

generator

+24

V

1A20

V

DD VP

VN

PWM

generator

+5V

1B20

V

DD VP

V

N

V

DD

V

P

VN

12V

V

DD

V

P

VN

PWM

generator

+5V

RGB PWM signal

1B20

V

DD VP

VN

1B20

V

DD VP

VN

1B20

V

DD VP

VN

1B20

VDD VP

VN

1B20

VDD VP

VN

1B20

VDD VP

VN

1B20

VDD VP

VN

1B20

VDD VP

VN

1B20

VDD VP

VN

PWM R

PWM R

PWM R

PWM G

PWM

G

PWM

G

PWM B

PWM

B

PWM

B

VDD1 VDD2

VDD VP

V

N

12V

V

P1 VN

12V

V

P

2

MT501

MT501

MT501 MT501 MT501 MT501 MT501

MT501 MT501 MT501

MT501 MT501 MT501

MT501 MT501

MT501

MT501

 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

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៪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

݇Ѣ߽⫼ᴀ䌘᭭ᯊⱘ⊼ᛣџ乍

⊼ᛣ

ᴀ᭛াᰃখ㗗䆥᭛ˈࠡ义᠔䕑㣅᭛⠜“Cautions”݋᳝ℷᓣᬜ࡯DŽ

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MOS-TECH Semiconductor Co.,LTD

  

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.

Keep safety first in your circuit designs!

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