KODENSHI S8300

S8300
Linear LED Driver IC
◈ Description
The S8300 is an integrated adjustable constant-current source, driving loads up to 600mA. The output
current level can be adjusted via an external resistor(RFB). The integrated SHDN input of the S8300P
permits LED brightness regulation by pulse width modulation (PWM), with the SHDN input, the LED
brightness can be regulated via duty cycle. Also, SHDN low sets the S8300 in sleep mode, the SHDN pin
also can be used as an enable input.
This discrete integration technology eliminates individual components by combining them into a single
package, which results in a significant reduction of both system cost and board space.
◈ Features
• Supplies stable bias current for LEDs
• LED drive current adjustable via single external resistor (Max 600mA)
• Low Cost, Low External Parts Count
• Halogen-Free Package is Available
◈ Pin Assignment & Description
8
1
Pin No
Symbol
Description
1
VCC
Power Supply
2
SHDN
Disable On/Off
3
GND
Ground
4
N.C
No connection
5
N.C
No connection
6
N.C
No connection
7
OUTPUT
Open Collector Output
8
FB
Feedback / 0.2V Reference
Package : SOP-8
◈ Ordering Information
Package Type
Device Name
Marking
SOP-8
S8300
S8300
KSD-I7F016-001
1
S8300
◈ Absolute maximum ratings
[Ta=25℃]
Characteristic
Symbol
Rating
Unit
Power Supply Voltage
VCC(MAX)
25
V
Output Voltage
VOUT(MAX)
25
V
Output Sink Current
IOUT(MAX)
600
mA
Thermal Resistance Junction-Ambient
Rth(j-a)*
156.3
℃/W
Power Dissipation
PD*
0.8
W
Operating Temperature Range
Topr
-40 ~ +85
℃
Storage Temperature Range
Tstg
-55 ~ +125
℃
2
* : Mounted on a glass epoxy circuit board of50x50mm Pad dimension of 50mm
◈ Recommended operating conditions
Characteristic
Symbol
Power Supply Voltage
Rating
Unit
Min
Max
VCC
3
24
V
Output Voltage
VOUT
1.5
Vcc
V
Output Sink Current
IOUT
-
500
mA
Shut Down Voltage
SHDN
-0.3
Vcc
V
◈ Electrical Characteristics (Ta=25℃, unless otherwise noted.)
Characteristic
Symbol
IQ Maximum
IQ
Leak Current
Condition
Min. Typ. Max.
Unit
VCC=3~24V, Iout=20mA, Vout=open
-
8
12
mA
Ileak
Vcc=5V, Vout=24V
-
0.1
1
µA
VFB
VCC=5V, Iout=10mA
-
200
208
mV
Dropout Voltage
Vdrop
VCC=5V, Iout=500mA
-
0.5
1.5
V
Line Regulation
△VFB1
VCC=3V~24V, Iout=10mA
-
2
10
mV
Load Regulation
△VFB2
VCC=5V, Iout=10mA~Iomax
-
3
25
mV
SHDN Voltage On
Vdis on
VCC=5V, Iout=10mA, Vout=Vcc
1.5
-
-
V
SHDN Voltage Off
Vdis off
VCC=5V, Iout=10mA
-
-
0.5
V
SHDN Pin Current
Idis
Vcc=5V, SHDN=5V
230
430
630
µA
Short Circuit Current
ISC
RFB=0Ω
-
1300
-
mA
-
-
160
-
℃
Feedback Voltage
Thermal Shutdown
TTSD
KSD-I7F016-001
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S8300
◈ Functional block diagram
VCC
OCP
TSD
Out
+
0.2V
SHDN
FB
GND
◈ Design Consideration
1) Calculation for RFB
- RFB = 0.2V / ILED
2) Calculation for Vdrop
- Vdrop = VCC – VLED
3) Calculation for Power Dissipation on the S8300P
-PD1 = (Vdrop – VFB) x ILED
-PD2 = VCC x IQ
-PD(total) = PD1 + PD2
4) If does not use an Dimming function, connect SHDN Pin with the ground.
5) When Vcc uses to exceed 25V, Dimming functions the use is impossible.
KSD-I7F016-001
3
S8300
◈ Typical Applications
<APP1. Constant Current LED Driver Circuit>
<APP2. PWM Dimming LED Driver Circuit>
<APP3. VAC Landscape Lighting Application Circuit>
KSD-I7F016-001
4
S8300
◈ Typical Applications
<APP4. High Voltage Operation of S8300P (1) >
<APP5. High Voltage Operation of S8300P (2) >
For operation in excess of S8300 specified maximum voltage (VCC & VOUT) of 25V, one way is
to connect a sufficient number of LEDs between the power supply voltage and the DC input of
the VCC&VOUT such that the voltage seen at pin(VCC & VOUT)is less than 25V.
That is to say, use additional LEDs to drop the voltage fed to the S8300 below its maximum
rating, in the usual way. Refer to APP4,5 Note that the exact number of diodes required will
depend on the supply voltage VCC and output voltage VOUT ,the voltage drops across the
particular LEDs being used. (Red, Blue and White LEDs have different forward voltage drop.)
Use enough LEDs such that voltage at pin(VCC & VOUT) of S8300 is < 25V
※ Caution : When VS uses to exceed 25V, Dimming functions the use is impossible.
<APP6. Power Supply Where Separates Operation of S8300P >
KSD-I7F016-001
5
S8300
◈ Electrical Characteristic Curves
Fig.2 Line Regulation vs TA
1.5
2.0
VCC = 5V
Io = 10mA
2.0
Line Regulation- △VFB [mV]
[%]
2.5
Feedbak Voltage Change - VFB
Fig.1 VFB vs TA
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
-60
-40
-20
0
20
40
60
80
△VCC=21V
Io=10mA
1.9
1.7
1.6
1.4
1.3
1.1
1.0
0.8
0.7
0.5
-60
100
-40
-20
Ambient Temperature - TA [℃]
40
60
10.0
8.0
Quiescent Current - IQ [mA]
VCC=5V
△Iout=490mA
9.0
80
100
Fig.4 Quiescent Current vs TA
Fig.3 Load Regulation vs TA
Load Regulation- △VFB [mV]
20
Ambient Temperature - TA [℃]
10.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
Io=20mA
Vo=Open
9.5
9.0
8.5
8.0
7.5
7.0
6.5
Vcc=3V
Vcc=5V
Vcc=24V
6.0
5.5
5.0
0.0
-60
-40
-20
0
20
40
60
80
-60
100
Ambient Temperature - TA [℃]
-20
0
20
40
60
80
100
Fig.6 Output Current vs Supply Voltage
650
600
VCC=5V
Io=500mA
630
-40
Ambient Temperature - TA [℃]
Fig.5 Dropout Voltage vs TA
RFB=0.4Ω
TA=25℃
550
610
Output Current [mA]
Dropout Voltage- VDROP[mV]
0
590
570
550
530
510
490
500
450
400
350
300
250
200
150
100
470
50
450
0
-60
-40
-20
0
20
40
60
80
100
Ambient Temperature - TA [℃]
0
5
10
15
20
25
30
Supply Voltage - Vcc [V]
KSD-I7F016-001
6
S8300
◈ Electrical Characteristic Curves
Fig.8 Short Circuit Current
Fig.7 Dimming Curve
100
Fre.1kHz
Fre.10KHz
LED Current ratio [%]
90
Ch1►
80
Ch2►
70
60
50
40
30
20
10
Ch3►
0
0
10
20
30
40
50
60
70
80
90
100
SHDN : Duty Ratio(%)
Ch1 : SHDN, 5V/Div
Ch2 :VOUT, 5V/Div
Ch3 : IOUT, 500mA/Div
Power Dissipation - PD [mW]
Fig.9 Power Dissipation vs TA
Ambient Temperature - TA [℃]
KSD-I7F016-001
7
S8300
SOP-8 Outline Dimension (mm)
※ Recommend PCB solder land
KSD-I7F016-001
[Unit: mm]
8
S8300
The AUK Corp. products are intended for the use as components in general electronic
equipment (Office and communication equipment, measuring equipment, home
appliance, etc.).
Please make sure that you consult with us before you use these AUK Corp. products
in equipments which require high quality and / or reliability, and in equipments which
could have major impact to the welfare of human life(atomic energy control, airplane,
spaceship, transportation, combustion control, all types of safety device, etc.). AUK
Corp. cannot accept liability to any damage which may occur in case these AUK Corp.
products were used in the mentioned equipments without prior consultation with AUK
Corp..
Specifications mentioned in this publication are subject to change without notice.
KSD-I7F016-001
9