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S8100
Power LED Driver IC
Description
The S8100 is a PWM high-efficiency LED driver control IC. It allows efficient operation of High Brightness (HB)
LEDs. The S8100 is capable to drive high current, high brightness LEDs up to 1.0 A by using additional external
output stages as Power MOSFET. The S8100 provides a low-frequency PWM dimming input that can accept
an external control signal with a duty ratio of 0-100% and a frequency of typical 100Hz. The output current
can be programmed between a few milliamps and up to more than 1.0A. The device is a small surface mount
package (SOT-26)
Features
Vcc : 2.5V~18V
Low Quiescent Current : 0.8mA
Output Source current : 0.15mA
PWM Dimming with pull-up resistor control
Stability compensation with 0.1µF ceramic capacitance
Small Surface-Mount SOT-26 Package
Halogen-Free Package is Available
Package : SOT-26
Pin Assignment & Description
654
VCC FB GND2
S8100
SHDN GND1 OUT
123
[Pin Assignment]
Ordering Information
Package Type
SOT-26
※ □ : Year&Week Code
Pin Symbol
Description
1 SHDN
Disable On/Off
2 GND1
Ground
3 OUTPUT
Gate
4 GND2
Bandgap GND
5 FB Feedback / 170mV Reference
6 VCC
Power Supply
Device Name
S8100
Marking
810
KSD-I5P011-001
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Absolute maximum ratings
Characteristic
Symbol
Power Supply Voltage
Output Voltage
Thermal Resistance Junction-Ambient
VCC(MAX)
VOUT(MAX)
Rth(j-a)*
Power Dissipation
PD*
Operating Temperature Range
Topr
Storage Temperature Range
Tstg
* Mounted on a glass epoxy circuit board of 30x30mm Pad dimension of 50mm2
Rating
18
16
250
0.5
-40 ~ +85
-55 ~ +150
S8100
[Ta=25]
Unit
V
V
/W
W
Electrical Characteristics (Ta=25, unless otherwise noted.)
Characteristic
Symbol
Condition
Min. Typ. Max.
Supply Current 1
IQ1 VCC=5V, FB=VOUT, SHDN=0V
- 0.8 2
Supply Current 2
IQ2 VCC=14V, FB=VOUT, SHDN=0V
- 1.0 2.2
Feedback Voltage 1
VFB1
VCC=5V, FB=VOUT, SHDN=0V
162 170 178
Feedback Voltage 2
VFB2
VCC=14V, FB=VOUT, SHDN=0V
162 170 178
SHDN Voltage
VSHDN
VCC=5V
1.15 1.21 1.27
Dimming Frequency (SHDN)
FDIM Rp=Min500~Max1K
- 100 -
Output Sink Current
IOS VCC=5V
- 45 60
Unit
mA
mA
mV
mV
V
Hz
mA
Functional block diagram
VCC
170mV
GND2
+
-
SHDN
1.2V
+
-
Out
FB
GND1
KSD-I5P011-001
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Typical Applications
S8100
R1
30K
Power BJT
(STD13003)
Supply
Voltage
9.1V Zener
(SDZ9V1)
C1
10uF
ON/OFF
VCC
OUT
S8100
SHDN
F.B
GND1, 2
CS
0.1uF
Power MOSFET
IOUT = 170mV / RFB
RFB
1) VCC = VZ - VBE
2) R1 supplies the base current which is necessary to Power BJT base.
3) If does not use an SHDN function, connect SHDN Pin with the ground.
4) Must supply the above of the voltage FETs VTH could operate enough to Vcc.
<Application 1. Constant Current LED Driver Circuit>
KSD-I5P011-001
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Typical Applications
S8100
R1
30K
9.1V Zener
(SDZ9V1)
Power BJT
(STD13003)
ISOURCE = (VCC-VTH)/RP
[Min500~Max1K]
Rp
C1
10uF
PWM
Dimming
(Typ 100Hz)
VCC
OUT
S8100
SHDN
F.B
GND1, 2
CS
0.1uF
Supply
Voltage
Power MOSFET
IOUT = 170mV / RFB
RFB
1) VCC = VZ - VBE
2) R1 supplies the base current which is necessary to Power BJT base.
3) If does not use an SHDN function, connect SHDN Pin with the ground.
4) Must supply the above of the voltage FETs VTH could operate enough to Vcc.
<Application 2. PWM Dimming LED Driver Circuit>
100
80
60
40
20 Ta = 25℃
P ower FET : S MK0260(AUK)
E n a b le Dim m in g fu n c tio n
0
10
100 1000
Frequency [Hz]
Rp=1KΩ
Rp=500Ω
LED current ratio must pay attention
according to Rp value and Power FET types.
10000
KSD-I5P011-001
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Electrical Characteristic Curves
S8100
Fig.1 Supply current vs Ambient Temperature
Fig.2 VSHDN vs Ambient Temperature
2.0
1.5 Vcc: 18V
1.0
0.5
0.0
0
Vcc: 5.0V Vcc: 2.0V
20 40 60 80
Ambient Temperature - TA []
100
1.225
1.220
1.215
1.210
1.205
1.200
0
2.0V ≤ Vcc ≤ 18V
20 40 60 80
Ambient Temperature - TA []
100
Fig.3 VFB vs Ambient Temperature
1 7 2 .0
1 7 1 .5
1 7 1 .0
Vcc: 2.0V
1 7 0 .5
1 7 0 .0
1 6 9 .5
1 6 9 .0
Vcc: 5.0V
Vcc: 18V
1 6 8 .5
1 6 8 .0
0
20 40 60 80
Ambient Temperature - TA []
100
Fig.4 Output Sink Current vs Ambient Temperature
60
Vcc: 18V
50
40
30
20 Vcc: 2.0V
10
Vcc: 5.0V
0
0 20 40 60 80 100
Ambient Temperature - TA []
KSD-I5P011-001
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