SSMG501 Series
Elektronische Bauelemente
Low Power Constant Current LED Driver
RoHS Compliant Product
A suffix of “-C” specifies halogen or lead -free
DESCRIPTION
SSMG501 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, SSMG501 keep LED’s
current very stable even when power or load fluctuate in a wide range and make intensity very uniform in large
area of LED light source.
Except power supply function, the VDD pin of SSMG501 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 SSMG501 be used as a current regulative diode (CRD) when VDD and
VP pin are tight together. This application makes SSMG501 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 application, two or more single channel SSMG501 can be
connected in series to share redundant high voltage. the extra redundant voltage can be share by each SSMG501 by
a reasonable mechanism. This special capability let SSMG501 very suit for the usage of wide range power supply
that many liner type LED drivers cannot work.
SOT-23
FEATURES
18mA~30mA constant current regulator
Self power structure, no extra power supply is needed
0.4V~17V output voltage
2µS/2µS current rising/falling time
Cascade-able for higher voltage application
No external current setting resistor is needed
1.6V~12V supply voltage
PWM dimming by V
DD
pin
-40℃~120℃ junction operating temperature
Less than 1%/V load(or line) regulation
A
L
3
3
Top View
1
2
C B
1
2
K
E
D
F
REF.
A
B
C
D
E
F
G
Millimeter
Min.
Max.
2.70
3.10
2.10
3.00
1.20
1.80
0.89
1.40
1.78
2.04
0.30
0.50
H
REF.
G
H
J
K
L
J
Millimeter
Min.
Max.
0.09
0.18
0.45
0.70
0.08
0.25
-
-
0.89
1.02
APPLICATIONS
General LED Lighting
LED back lighting
LED torch/flashing
RGB lighting
MARKING CODE
SSMG501-18: 1A18
SSMG501-20: 1A20
SSMG501-25: 1A25
SSMG501-30: 1A30
Note: 18, 20, 25, 30 = Output Current(mA)
PACKAGE INFORMATION
Weight: 0.07800g (Approximately)
http://www.SeCoSGmbH.com/
Any changes of specification will not be informed individually.
11-Dec-2009 Rev. B
Page 1 of 4
SSMG501 Series
Elektronische Bauelemente
Low Power Constant Current LED Driver
BLOCK DIAGRAMS PER CHANNEL AND IDEAL I
V
CHARACTERISTICS
TERMINAL DESCRIPTION
Pin name
V
DD
V
P
V
N
Function
Power supply
Current in
Current out
Pin #
2
1
3
ABSOLUTE MAXIMUM RATINGS
(T
A
= 25°C)
PARAMETER
Supply Voltage
Output Voltage
Output Current
Power Dissipation
Thermal Resistance
Operating Temperature
Storage Temperature
SYMBOL
V
DD
V
P
I
PN
P
D
R
θJA
T
OPR
T
STG
RATINGS
0 ~ 17
-0.2 ~ 20
IS** +10%
250
300
-40 ~ +85
-55 ~ +150
UNIT
V
V
mA
mW
℃
/W
℃
℃
ELECTRICAL CHARACTERISTICS AND RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
Supply Current
Output Voltage
Output Current
Leakage
Line Regulation
Load Regulation
Thermal Regulation
Threshold Voltage
Current Boost
**
I
s
is output saturation current.
SYMBOL
V
DD
I
DD
V
P
I
S
I
Leakage
%/V
DD
%/V
P
%/10℃
V
iboost
I
boost
CONDITION
Room Temp.
-
V
DD
=5V, I
P
≒
I
S
**
V
DD
=3V, I
P
≒
I
S
**
V
DD
=1.7V, I
P
≒
I
S
**
Spec
0.4V > V
DD
> 0V, V
P
=15V
12V > V
DD
> 1.6V
10V > V
P
> 1.6V
V
DD
=VP=2V
I
P
=IS*1.1
V
P
=Viboost
MIN
1.6
100
0.4
0.45
1.2
15
1
-
-
-
11
7
TYP
-
150
-
-
-
-
-
-
-
-
12
10
MAX
12
250
17
17
17
30
5
±1
±1
±0.5
13
13
UNIT
V
µA
V
V
V
mA
µA
%/V
%/V
%/10℃
V
%* IS
SWITCHING CHARACTERISTICS
(T
A
= 25°C)
PARAMETER
Propagation Delay Time VDD “L”
→”H”
Output Current Rising Time
Propagation Delay Time VDD “H”
→”L”
Output Current Falling Time
SYMBOL
t
pLH
t
Rise
t
pHL
t
Fall
CONDITION
VP=1V, VDD=0V→3V
VP=1V, VDD=0V→3V
VP=1V, VDD=3V→0V
VP=1V, VDD=3V→0V
MIN
-
-
-
-
TYP
1
1.5
1
1.5
MAX
-
5
-
5
UNIT
µS
µS
µS
µS
http://www.SeCoSGmbH.com/
Any changes of specification will not be informed individually.
11-Dec-2009 Rev. B
Page 2 of 4
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