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PDF FP7171 Data sheet ( Hoja de datos )

Número de pieza FP7171
Descripción Universal High Brightness LED Driver
Fabricantes Feeling Technology 
Logotipo Feeling Technology Logotipo



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Universal High Brightness LED Driver
FP7171
General Description
The FP7171 is an open loop, current mode, control LED driver IC. The FP7171 can be
programmed to operate in either a constant frequency or constant off-time mode. It includes an 15 -
450V linear regulator which allows it to work from a wide range of input voltages without the need for
an external low voltage supply. The FP7171 includes a PWM dimming and 0 - 250mV linear dimming
input which can be used for linear dimming of the LED current. The FP7171 is ideally suited for buck
LED drivers. Since the FP7171 operates in open loop current mode control, the controller achieves
good output current regulation without the need for any loop compensation.
Features
Switch mode controller for single switch LED drivers
Enhanced drop-in replacement to the FP7171
Open loop peak current controller
Internal 15 to 450V linear regulator
Constant frequency or constant off-time operation
Linear and PWM dimming capability
Requires few external components for operation
Applications
DC/DC or AC/DC LED driver applications
RGB backlighting LED driver
Back lighting of flat panel displays
General purpose constant current source
Signage and decorative LED lighting
Chargers
Typical Application Circuit
VIN
VIN RT
FP7171
CS LD
GND
VDD
GATE
PWMD
Linear
Dimming
PWM
Dimming
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. 0.6
1/12

1 page




FP7171 pdf
FP7171
Recommended Operating Conditions
Parameter
Symbol
Conditions
Supply Voltage
VCC
Operating Temperature
Min.
15
-25
Typ.
Max.
450
125
Unit
V
°C
DC Electrical Characteristics (VCC=15V,TA = 25°C, unless otherwise noted)
Parameter
Symbol
Conditions
Min. Typ. Max.
Internal Regulator
Internally regulated voltage
Line regulation of VDD
VIN = 15V, IDD(ext)= 0,
VDD 500pF at GATE; RT = 226k 7.25 7.5 7.75
Ω , PWMD = VDD
VIN = 15 450V, IDD(ext)=0,
Δ VDD 500pF at GATE; RT = 226k
Ω , PWMD = VDD
0
- 1.0
Internal Regulator
Load regulation of VDD
VDD undervoltage lockout
threshold
VDD undervoltage lockout
hysteresis
PWM Dimming
IDD(ext) = 0 - 1.0mA, 500pF
Δ VDD,load at GATE; RT = 226kΩ ,
PWMD = VDD
0
100
UVLO VDD rising
6.45 6.7 6.95
Δ UVLO VDD falling
500
Pin PWMD input low voltage
VEN(lo) VIN = 15 - 450V
0.9
Pin PWMD input high voltage
Pin PWMD pull-down resistance
at PWMD
Current Sense Comparator
Current sense pull-in threshold
voltage
VEN(hi) VIN = 15 - 450V
REN VPWMD = 5.0V
-40°C < TA < +85°C
VCS,TH TA < +125°C
1.8
50 100 150
Offset voltage for LD comparator VOFFSET
-12 12
0 < TA < +85°C, VLD = VDD,
VCS = VCS,TH + 50mV after
150
215
280
Current sense blanking interval
TBLANK
TBLANK
-40 < TA < +125°C, VLD =
VDD, VCS = VCS,TH + 50mV
145
215
315
after TBLANK
Delay to output
tDELAY
80 150
Oscillator
Oscillator frequency
RT = 1.00MΩ
fOSC RT = 226kΩ
20 25 30
80 100 120
GATE Driver
GATE sourcing current
ISOURCE VGATE = 0V, VDD = 7.5V
165
GATE sinking current
ISINK VGATE = VDD, VDD = 7.5V
165
GATE output rise time
tRISE CGATE = 500pF, VDD = 7.5V
30 50
GATE output fall time
tFALL CGATE = 500pF, VDD = 7.5V
30 50
Unit
V
V
mV
V
mV
kΩ
mV
ns
ns
kHz
mA
mA
ns
ns
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. 0.6
5/12

5 Page





FP7171 arduino
Typical Application
FP7171
LED
CLED
1uF
L1 3.3mH
D1
ER2J
CIN
4.7uF
Q1
QM01N65U
RCS
5Ω
VIN RT
FP7171
CS LD
GND
VDD
GATE
PWMD
RT 220kΩ
CVDD
0.1uF
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. 0.6
11/12

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