FP7103DR-LF [FEELING]
28V, 3A Buck Constant Current Switching Regulator for White LED;
| 型号： | FP7103DR-LF |
| 厂家： | 
Feeling Technology |
| 描述： | 28V, 3A Buck Constant Current Switching Regulator for White LED |
| 文件： | 总12页 (文件大小：633K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FP7103
28V, 3A Buck Constant Current Switching Regulator
for White LED
General Description
The FP7103 is a PWM control buck converter designed to provide a simple, high efficiency
solution for driving high power LEDs. With a 0.25V reference voltage feedback control to minimize
power dissipation, an external resistor sets the current as needed for driving various types of LEDs.
The FP7103 includes a high current P-MOSFET to realize high efficiency and excellent transient
characteristics. The PWM control circuit is able to change the duty ratio linearly from 0 up to 100%.
Other features include user accessible EN pin for enabling, thermal shutdown, cycle-by-cycle current
limit and over current protection.
Features
Wide Supply Voltage Operating Range: 3.6 to 28V
Built-in P-MOSFET for 3A Loading Capability
Precision Feedback Reference Voltage: 0.25V (2%)
Low Current Consumption: 4mA
Internal Fixed Oscillator Frequency: 320KHz (Typ.)
Internal Soft-Start Function (SS)
Over Current Protection
Package: SOP-8L& SOP-8L(EP)
Typical Application Circuit
LX
LX
VCC
V
IN
FP7103
ON/OFF
EN
FB
COMP
GND
GND
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
1/12
FP7103
Function Block Diagram
EN
VCC
Enable
Control
Reference
Regulator
Oscillator
Over Current
Protection
2.50V
FB
36K
Output Drive
Control
Circuits
0.25V
500
COMP
Thermal
Shutdown
Internal Soft Start
Circuit
GND
GND
LX
LX
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
2/12
FP7103
Pin Descriptions
SOP- 8L
Top View
Name No. I / O
Description
Error Amplifier Inverting Input
Enable Control
1
FB
8
7
6
5
GND
GND
LX
FB
EN
1
2
3
4
5
6
7
8
I
I
2
EN
COMP
VCC
O
P
P
P
O
O
Error Amplifier Compensation Output
IC Power Supply (PMOS Source)
PMOS High Current Output
PMOS High Current Output
IC Ground
3
COMP
LX
4
VCC
LX
LX
GND
GND
IC Ground
SOP-8L (EP)
Top View
Name No. I / O
Description
Error Amplifier Inverting Input
Enable Control
1
FB
8
7
6
5
GND
GND
LX
FB
EN
1
2
3
4
5
6
7
8
9
I
2
EN
I
COMP
VCC
O
P
P
P
O
O
P
Error Amplifier Compensation Output
IC Power Supply (PMOS Source)
PMOS High Current Output
PMOS High Current Output
IC Ground
3
COMP
4
VCC
LX
LX
LX
GND
GND
EP
Bottom View
IC Ground
Exposed PAD. Must connect to LX
EP
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
3/12
FP7103
Marking Information
SOP-8L & SOP-8L (EP)
FP7103
Halogen Free
Lot Number
Internal ID
Per-Half Month
Year
Halogen Free: Halogen free product indicator
Lot Number: Wafer lot number’s last two digits
For Example: 132386TB 86
Internal ID: Internal Identification Code
Per-Half Month: Production period indicated in half month time unit
For Example: January → A(Front Half Month), B (Last Half Month)
February → C(Front Half Month), D (Last Half Month)
Year: Production year’s last digit
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
4/12
FP7103
Ordering Information
Part Number
FP7103DR-LF
FP7103XR-LF
Operating Temperature
Package
SOP-8L
MOQ
2500EA
2500EA
Description
Tape & Reel
Tape & Reel
-25°C ~ +85°C
-25°C ~ +85°C
SOP-8L (EP)
Absolute Maximum Ratings
Min.
Typ.
Max.
28
Parameter
Power Supply Voltage
Output Source Current
Error Amplifier Inverting Input
Allowable Dissipation
Symbol
Conditions
Unit
V
VIN
3
A
-0.3
+1.2
650
V
mW
TA≦+25℃
Thermal Resistance Junction to
Ambient
Thermal Resistance Junction to
Case
θJA
θJC
+175
+45
℃ / W
℃ / W
HBM (Human Body Mode)
MM (Machine Mode)
2
KV
V
ESD Susceptibility
200
Storage Temperature
-55
+125
+260
℃
Lead Temperature (soldering, 10
sec)
℃
IR Re-flow Soldering Curve
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
5/12
FP7103
Recommended Operating Conditions
Min.
3.6
Typ.
Max.
Parameter
Supply Voltage
Operating Temperature
Symbol
Conditions
Unit
V
VIN
28
85
-25
℃
DC Electrical Characteristics (VCC=6V, TA= 25℃, unless otherwise noted)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Reference
Output Voltage
VREF FB connected to COMP
0.245
0.25
0.255
12.5
2
V
△VREF
Input Regulation
2
1
1
mV
VCC＝3.6 V to 25 V
TA＝-25℃ to +25℃
TA＝+25℃ to +85℃
△VREF
VREF
/
Output Voltage Change with
Temperature
%
2
Oscillator Section
Oscillation Frequency
f
320
5
KHz
%
Frequency Change with Voltage
Δf / ΔV VCC=3.6V to 25V
Frequency Change with
Temperature
Δf / ΔT
5
%
TA = -25℃ to +85℃
Error Amplifier Section
Input Bias Current
IB
-1.0
1.7
-0.2
100
6
1.0
0.2
μA
V / V
MHz
V
Voltage Gain
Av
Frequency Bandwidth
Output Voltage Swing Positive
Output Voltage Swing Negative
Output Source Current
Output Sink Current
BW
VPOS
VNEG
Av=0 dB
2
0.1
-30
30
V
ISOURCE Vcomp=200mV
ISINK Vcomp=200mV
-15
15
μA
μA
Idle Period Adjustment Section
Maximum Duty Cycle
Output Section
TDUTY VFB =0.2V
100
%
PMOS D-S Voltage
VDSS VCOMP=0.1V
ID
-20
-3
V
A
PMOS Source Current
VCC=5.0V, V FB=0V
64
40
87
52
-1
PMOS On Resistance
RDS (ON)
mΩ
μA
VCC=10V, V FB=0V
Output Leakage Current
IL
VDS=-24V, VGS=0V
Thermal Shutdown Section
Thermal shutdown Temperature
150
4
℃
Over Current Protection Section
PMOS OCP Current IOCP
A
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
6/12
FP7103
Min.
Typ.
Max.
Parameter
Total Device Section
EN Input Current
Symbol
Conditions
Unit
IEN
VUPPER
VLOW
VHYS
EN pin Open
20
μA
V
Upper Threshold Voltage (EN)
Lower Threshold Voltage (EN)
Hysteresis
1.12
0.87
250
4
V
210
mV
mA
μA
Average Supply Current
VCC Shutdown Current
IAVE
6
Ishutdown
15
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
7/12
FP7103
Detailed Description
Voltage Reference
A built-in 2.5V reference regulator supplies FP7103 internal circuits. Also, this 2.5V reference
voltage is divided down by an internal resistive divider to provide a 0.25V precision reference voltage to
the error amplifier non-inverting terminal.
Setting the LED Current
FP7103 is a constant current buck regulator. The LEDs are connected between VOUT and FB pin
as shown in the Typical Application Circuit section. The FB pin is 0.25V in regulation. Therefore, the
LEDs current IF is set by VFB and the resistor R2 connected between FB and ground by the following
equation:
VFB
IF
R2
IF should not exceed the 3A current capability of FP7103 and therefore R2 minimum must be
approximately 0.083Ω
Output Voltage
The output voltage is primarily determined by the number of LEDs(n) connected between VOUT
and FB pin. Therefore, VOUT can be written as:
VOUT ((n VF ) VFB )
Where VF is the forward voltage of one LED at the set LED current level (see LED manufacturer
datasheet for forward characteristics curve)
Oscillator
The fixed PWM frequency is generated by an internal oscillator. Its typical values are 320KHz.
Thermal Protection
The thermal protection is triggered when junction temperature is higher than 150℃ that may
occurs by an abnormal heavy current loading. When this happens, the FP7103 turns output off. Once
the junction temperature is cooled down to lower than 130℃, FP7103 starts again and turns the power
switch on.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
8/12
FP7103
Over Current Protection
The FP7103 uses cycle-by-cycle current limit to protect the internal power switch. During each
switching cycle, a current limit comparator detects if the power switch current exceeds the internal
setting current. If it does, over current protection function decrease the oscillator frequency to prevent
thermal issue.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
9/12
FP7103
Application Information
Typical Application Circuit
IC1
FB
1
2
3
4
8
7
6
5
GND
GND
VIN
EN
FP7103
R1
0
C2
COMP
LX
0.1µF
L1 10µH
VIN
VCC
LX
LED
C7
C4
0.1µF
100µF
C1
0.1µF
C6
100µF
D1
SK34
R2
0.25
FP7103 3W / 5W LED for DC Input Circuit
Dimming Control Circuit
Changing the duty cycle of PWM signal can get different LED current. The PWM signal is
recommended above 10kHz. The application circuit is shown in the following.
Dimming Control
R4 2K
R3
37K
IC1
R5
1K
C5
2.2µF
1
2
3
4
8
7
6
5
GND
GND
FB
VIN
0V~5V
EN
PWM
FP7103
R1
0
C2
COMP
LX
0.1µF
L1 10µH
VIN
VCC
LX
LED
C7
100µF
C4
0.1µF
C1
0.1µF
C6
100µF
D1
SK34
R2
0.25
The LED current can be calculated by the following equation:
R4(VPWM Duty VFB
)
VFB
R3 R5
ILED
R2
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
10/12
FP7103
Package Outline
SOP-8L
UNIT: mm
Max. (mm)
Symbols
Min. (mm)
1.346
A
A1
A2
D
1.752
0.254
1.498
4.978
3.987
6.197
1.270
8°
0.101
4.800
3.810
5.791
0.406
0°
E
H
L
θ°
Note:
1. Package dimensions are in compliance with JEDEC outline: MS-012 AA.
2. Dimension “D” does not include molding flash, protrusions or gate burrs.
3. Dimension “E” does not include inter-lead flash or protrusions.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
11/12
FP7103
SOP-8L (EP)
UNIT: mm
Symbols
Min. (mm)
1.346
Max. (mm)
1.752
0.152
1.498
4.978
3.987
6.197
1.270
8°
A
A1
A2
D
0.050
4.800
3.810
5.791
0.406
0°
E
H
L
θ°
Exposed PAD Dimensions:
Symbols
Min. (mm)
Max. (mm)
E1
D1
2.184 REF
2.971 REF
Note:
1. Package dimensions are in compliance with JEDEC outline: MO-178 AA.
2. Dimension ”D” does not include molding flash, protrusions or gate burrs.
3. Dimension “E” does not include inter-lead flash or protrusions
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 0.94
12/12
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