MEL7136A/MEL7136B
Linear Adjustable Constant Current LED Driver MEL7136A/MEL7136B
General Description
The MEL7136A is a constant current regulator
for driving LEDs with low quiescent current and low
dropout voltage. The current is adjustable from
10mA to1A with an external resistor.
The MEL7136B is only a controller , and must be
connected to an external NMOS. MEL7136B is an
external transistor, is suitable for applications
requiring a high output current . The output current
of ME7136B can be adjusted by external DC
control voltage or PWM control.
Only one external resistor is required to achieve
a constant current LED driver. Soft start , thermal
protection and low voltage protection are also
provided.
The driver pin EXT is provided for current and
voltage extension. Adding an external NMOS or
NPN transistor to this pin can extend current and
voltage range.
Features
MEL7136B is only a controller , and must be
connected to an external NMOS.
The output current of ME7136B is adjustable
Sink current:10mA to1A adjustable with an external
resistor
Current and voltage range extendable by adding an
external NMOS or NPN transistor
Power supply voltage: 2.7-18V
Low drop out voltage: 50mV@1A
Low quiescent current: 80uA
Thermal Shutdown protection：165℃
Soft start
Low voltage protection: 2.5V
Package: MEL7136A: SOT89-5, ESOP8
MEL7136B: SOT23-5
Selection Guide
Typical Application
Power Led driver and controller
Typical Application Circuit
V05
www.microne.com.cn
Page 1 of 14
MEL7136A/MEL7136B
ESOP8
SOT23-5
Operating Temperature Range
Storage Temperature Range
Lead Temperature
ESD(ESD voltage for human body model )
V
ESD
P
D
P
D
T
OPR
T
STG
2000
2000（PCB mounted）
（
*1
）
300
－40½＋125
－40½＋150
260℃，4sec
2000
V
mW
(T=25℃)
℃
℃
*1:The power dissipation figure shown in PCB mounted. Please refer to page8-9 for details.
Electrical Characteristics
MEL7136A/MEL7136B
(V
DD
= 3.6V, Ta=25
O
C, unless otherwise noted)
Parameter
Sink Current
Input Voltage
CS Voltage
Sink current accuracy
Load Regulation
Line Regulation
Output dropout
voltage
Quiescent Current
Low Voltage
Protection
Low voltage hysteresis
Maximal EXT Voltage
Thermal Shutdown
protection
Vhys
V
EXT
Tsd
V
DD
=5.0V,V
CS
=0V
2.5
Symbol
I sink
V
DD
V
CS
△ILED/ILED
LDR
LNR
V drop
I
SS
I sink=1A
VLED=0.2V to 3V
V
DD
=3.6V
VLED= 3V
3.6V≤V
DD
≤18V
V
DD
=3.6V, VLED= 0.5V
V
DD
=3.6V
2.3
Conditions
V
DD
=3.6V
I sink=1A
Min.
10
2.7
95
-5
100
-2.5
0.1
0.4
50
80
2.5
0.15
3.6
165
4.5
Typ.
Max.
1000
18
105
5
2
2
100
100
2.7
Units
mA
V
mV
%
mA/V
mA/V
mV
uA
V
V
V
℃
V05
www.microne.com.cn
Page 5 of 14
聊聊、笑笑、闹闹
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
