FP7183
LED Driver with Average-Mode Constant Current Control
General Description
The FP7183 is an average current mode control LED driver IC operating in a constant off-time
mode. FP7183 does not produce a peak-to-average error, and therefore greatly improves accuracy,
line and load regulation of the LED current without any need for loop compensation or high-side
current sensing. The output LED current accuracy is ±2%.
The FP7183 can be powered from an 8.0 - 100V supply. A PWM dimming input is provided that
accepts an external control TTL compatible signal. The output current can be programmed by an
internal 250mV reference, or controlled externally through a 0.2 – 1.5V dimming input.
Features
Fast average current control
Internal 8 to 100V linear regulator
Linear and PWM dimming capability
Output short circuit protection with skip mode
Requires few external components for operation
Internal 100V N-MOSFET
Applications
DC/DC LED driver applications
Back lighting of flat panel displays
General purpose constant current source
Signage and decorative LED lighting
Chargers
Typical Application Circuit
VIN
Up to 100V
VIN
PWM and Linear
Dimming
GND
LED
DIM
GND
VDD
LX
CS
LX
FP7183
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. 0.61
1/13
FP7183
Function Block Diagram
VIN
Regulator
Internal
supply
POR
UVLO
VDD
LX
DIM
200mV/250mV
Average Current
Logic Control
100V N-MOS
DIM to CS ratio = 0.167
LEB
CS
GND
OTP
T
OFF
Timer
SCP
550mV
Pin Descriptions
SOP-8L(EP)
Top View
VIN
DIM
VDD
CS
1
8
Name
GND
GND
LX
LX
No. I / O
1
2
3
4
5
6
7
8
9
I
I
I
I
O
O
P
P
O
Description
This pin is the input of an 8 - 100V linear
regulator.
This pin is the linear and PWM dimming input
of the IC.
This is the power supply pin for all internal
circuits.
This pin is the current sense pin used to
sense the FET current by means of an
external sense resistor.
Power switch
Power switch
Ground return for all internal circuitry.
Ground return for all internal circuitry.
Exposed PAD. Must connect to LX.
VIN
DIM
VDD
CS
LX
LX
GND
GND
2
7
FP7183
XXx-XXL
EP
3
6
4
5
Bottom View
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. 0.61
2/13
FP7183
Marking Information
XXx - XXL
FP7183
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
Lot : 123456
XXx-56L
Internal ID:
Internal Identification Code
Per-Half Month:
Production period indicator in half month time unit
For Example : A → First Half Month of January
B → Second Half Month of January
C → First Half Month of February
D → Second Half Month of February
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. 0.61
3/13
FP7183
Ordering Information
Part Number
FP7183XR-G1
Operating Temperature
-25°C ~ +85°C
Package
SOP-8L(EP)
MOQ
2500 EA
Description
Tape & Reel
Absolute Maximum Ratings
Parameter
Power Supply Voltage
CS, DIM, GATE,
Internal MOS V
DS
Breakdown
Voltage
Allowable Power Dissipation
Junction to Ambient Thermal
Resistance
Operating Temperature
Storage Temperature
SOP-8L(EP) Lead Temperature
T
S
SOP-8L(EP)
(soldering, 10 sec)
V
DS
P
D
θ
JA
-25
-40
SOP-8L(EP) T
A
≦+25°C
128
+85
+150
+260
Symbol
V
IN
V
DD
Conditions
V
IN
to GND
V
DD
to GND
Min.
Typ.
Max.
100
8.5
Unit
V
V
V
V
-0.3
100
V
DD
-0.3V
630
mW
°C / W
°C
°C
°C
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. 0.61
4/13
FP7183
Recommended Operating Conditions
Parameter
Supply Voltage
Operating Temperature
Symbol
V
IN
Conditions
Min.
8.5
-25
Typ.
Max.
100
85
Unit
V
°C
DC Electrical Characteristics
(V
IN
=11V,T
A
= 25°C, unless otherwise noted)
Parameter
Internal Regulator
Internally regulated voltage
Line regulation of VDD
Load regulation of V
DD
V
DD
undervoltage lockout
threshold
V
DD
undervoltage lockout
hysteresis
V
DD
ΔV
DD,line
ΔV
DD,load
UVLO
VIN = 8V, I
DD(ext)
= 0, 500pF at
GATE;DIM = VDD
VIN = 8 – 100V, I
DD(ext)
=0,
500pF at GATE;, DIM= VDD
I
DD(ext)
= 0 – 0.6mA, 500pF at
GATE;DIM = VDD
V
DD
rising
7.25
0
0
6.5
500
7.5
-
7.75
1.0
100
V
V
mV
V
mV
Symbol
Conditions
Min.
Typ.
Max.
Unit
ΔUVLO V
DD
falling
PWM Dimming
Pin DIM input low voltage
Pin DIM input high voltage
V
EN(lo)
V
EN(hi)
V
IN
= 8 - 100V
V
IN
= 8 - 100V
1.6
0.1
V
V
Average Current Sense Logic
Current sense reference voltage
DIM-to-CS voltage ratio
DIM-to-CS voltage offset
CS threshold temp regulation #
DIM input voltage, shutdown
DIM input voltage, enable
Current sense blanking interval
Minimum on-time
V
DIM(OFF)
△
V
DIM(OFF)
V
CS
A
V(DIM)
AV
DIM
(OFFSET)
0.245
0.164
Offset = V
CS
– A
V(DIM)
‧V
DIM
V
DIM
=1.2V
0
0.25
0.167
0.255
0.17
10
5
mV
mV
mV
mV
mV
200
250
250
CS=V
CS
+ 30mV
350
1000
T
BLANK
T
ON(min)
ns
ns
Short Circuit Protection
Hiccup threshold voltage
Current limit delay CS – GATE #
Short circuit hiccup time
Minimum on-time (short circuit)
V
CS
T
DELAY
T
HICCUP
T
ON(min)
CS=V
DD
CS=V
CS
+ 30mV
450
550
495
550
605
150
650
600
mV
ns
us
ns
Notes
:
# Guaranteed by design
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. 0.61
5/13
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