Connectors
03/21/11
Specifications and
Applications Information
page 1 of 5.
The ERG Smart Force SeriesSmart Force Series
Smart Force SeriesSmart Force Series
Smart Force Series of LED Drivers are specifically
designed for applications which require wide dimming and LCD
brightness stability over a wide input voltage range. The
SFD2EB3893F is designed to provide backlight power for the
Sharp LQ150X1LG82 display.
Designed, manufactured and supported within the USA, the
SFD2E features:
10 mm or less in height
Wide input voltage range
Constant LED current
External dimming or on-board dimming
High dimming ratio
Soft start
One year warranty
J1-1 Vin(+)
J1-2 Vin(+)
J1-3 Vin(+)
J1-4 GND
J1-5 GND
J1-6 GND
J1-7 Enable
J1-8 Control
Output Connector *
Molex
53261-1271
SmarSmar
SmarSmar
Smart Ft F
t Ft F
t Foror
oror
orce LEDce LED
ce LEDce LED
ce LED
DriverDriver
DriverDriver
Driver
Input Connector
Molex
53261-0871
Package Configuration
Mass: 18 grams typ.
J2-1 Cathode 1 J2-7 (do not use)
J2-2 Anode 1 J2-8 (do not use)
J2-3 (do not use) J2-9 Cathode 3
J2-4 (do not use) J2-10 Anode 3
J2-5 Cathode 2 J2-11 (do not use)
J2-6 Anode 2 J2-12 (do not use)
SFD2EB3893F
PCB components are shown for reference only. Actual product may differ from that shown.
1
Output
.125
[3,18]
Dia. (2x)
2.105
[53,47]
.700
[17,79]
.145
[3,68]
Input
1.115
[28,32]
4.585
[116,5]
.830
[21,08]
1
* Requires harness:
ERG part number H12406152 recommended
page 2 of 5.
sgnitaRmumixaMetulosbA
gnitaRlobmySeulaVstinU
egnaRegatloVtupnI V
ni
0.02+ot3.0-cdV
erutarepmeTegarotS T
gts
58+ot04-
o
C
egatloVtupnIelbanE V
elbanE
niVot0cdV
egatloVtupnIlortnoC V
MWP
0.5+ot0cdV
scitsiretcarahCgnitarepO
52=aTdnacdstloV00.21=niVdetonesiwrehtosselnU
o
.C
citsiretcarahClobmySniMpyTxaMstinU
egatloVtupnI V
ni
8.01+0.21+0.81+cdV
ecafruStnenopmoC
erutarepmeT
)1etoN(
T
s
04--08+
o
C
tnerruChsurnIkaeP
)2etoN(
I
kaep
-1.1- cdA
tnerruCtupnI I
ni
97.039.070.1cdA
egatloVgnirtSDELV
DEL
2.72-8.63cdV
ycneiciffE
)3etoN(
hh
h
hh -48-%
)gnirtsrep(tnerruCtuptuOI
tuo
3989301cdAm
niPelbanE
dlohserhTno-nruT V
noht
-- 0.2cdV
dlohserhTffo-nruT V
ffoht
8.0-- cdV
ecnadepmItupnIelbanE
)4etoN(
R
elbanE
-0.5- smhOk
niPlortnoC
)6,5setoN(
dlohserhTno-lluF V
noht
-0.1- cdV
dlohserhTffo-lluF V
ffoht
-5.4- cdV
tnerruCsaiBtupnIlortnoC I
saibC
-- 01Au
ycneuqerF F
MWP
-542-zH
SFD2EB3893F
Specifications subject to change without notice.
Note 1 Surface temperature must not exceed 80°C.
Note 2 Peak inrush occurs over a 1 to 3 ms time period during initial startup.
Note 3 Efficiency is calculated using a 32V LED string.
Note 4 Enable pin input impedance is 5.0kΩ to 2.5V.
Note 5 Control pin is internally pulled up above the turn-on threshold.
Note 6 Control pin input impedance is 485kΩ.
page 3 of 5.
Application Information
The ERG SFD2EB3893F has been designed to be configured in multiple ways:
NO DIMMING
•OPERATION: The SFD2E can be configured to operate without dimming by floating the Control (J1-8) pin.
•Pins 1, 2 and 3 of connector J1 must be connected to +Vin, between 10.8 and 18 Vdc. Pins 4, 5 and 6 of
connector J1 must be connected to GND.
•Enable Pin (J1-7) must be high for driver to be on.
ONBOARD PWM DIMMING
•OPERATION: Onboard PWM configuration as shown in Figure 1 allows the user to control display brightness by
controlling the onboard PWM generator. The user is responsible to provide an analog control signal. A minimum
pulse width of 80μs is possible with this configuration.
•DIMMING: Dimming is accomplished by applying an analog voltage to the Control Pin (J1-8). Display brightness
is modulated by controlling the Control Pin voltage as shown in Graph 1.
•ENABLE/DISABLE: The driver may be enabled or disabled (turned on and off) by applying a DC voltage to the
Enable Pin(J1-7). Enable Pin on and off levels are specified in the Operating Characteristics section of the data
sheet.
• Pins 1, 2 and 3 of connector J1 must be connected to +Vin, between 10.8 and 18 Vdc. Pins 4, 5 and 6 of
connector J1 must be connected to GND.
EXTERNAL PWM DIMMING
•OPERATION: External PWM configuration as shown in Figure 2 allows the user to control display brightness
with an externally generated PWM signal. The user is responsible to provide the PWM signal. A minimum pulse
width of 80μs is possible with this configuration.
•DIMMING: Dimming is accomplished by applying a PWM signal to the Enable Pin (J1-7). Enable on and off
levels are specified in the Operating Characteristics section of the data sheet. Display brightness is modulated
by controlling the PWM duty cycle as shown in Graph 2.
•Pins 1 through 3 of connector J1 must be connected to +Vin, between 10.8 and 18 Vdc. Pins 4 through 6 of
connector J1 must be connected to GND.
SFD2EB3893F
page 4 of 5.
SFD2EB3893F
Graph 1
ONBOARD PWM DIMMING
Figure 1
Vin
GND
Control
Enable
Cathode 1
J2
+12V
GND
Vin
Analog Dimming
Voltage (0 to 5V)
J1
1,2,3
4,5,6
8
7
Cathode 2
Anode 1
+On
-Off
Optional
Potentiometer
1,2,3
4,5,6
Anode 2
Cathode 3
Anode 3
page 5 of 5.
SFD2EB3893F
U
L
®
R
E
G
I
S
T
E
R
E
D
F
I
R
M
R
E
G
I
S
T
E
R
E
D
F
I
R
M
E
n
d
i
c
o
t
t
R
e
s
e
a
r
c
h
G
r
o
u
p
,
I
n
c.
I
S
O
9
0
0
1
A
3
3
1
3
Endicott Research Group, Inc. (ERG) reserves the right to make changes in circuit design and/or
specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets
are current before placing orders. Information furnished by ERG is believed to be accurate and
reliable. However, no responsibility is assumed by ERG for its use.
Graph 2
Figure 2
Control
Enable
J2
+12V
GND
Vin
J1
1,2,3
4,5,6
8
7
EXTERNAL PWM DIMMING
(1)
(1) Nonlinear relationship from 0 to 2% duty cycle.
5V
0V
Duty Cycle
0% - 100%
Anode 1
Cathode 1
Cathode 2
Anode 2
Cathode 3
Anode 3
