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FAN5343UMPX Fiches technique(PDF) 5 Page - Fairchild Semiconductor

No de pièce FAN5343UMPX
Description  6-LED Series Boost LED Driver with Integrated Schottky Diode and Single-Wire Digital Interface
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5343UMPX Fiches technique(HTML) 5 Page - Fairchild Semiconductor

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© 2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
5
Electrical Specifications
VIN = 2.7V to 5.5V and TA = -40°C to +85°C unless otherwise noted. Typical values are at TA = 25°C and VIN = 3.6V.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
Power Supplies
ISD
Shutdown Supply Current
EN = GND, VIN = 3.6V
0.30
0.75
μA
VUVLO
Under-Voltage Lockout Threshold
VIN Rising
2.10
2.35
2.60
V
VIN Falling
1.90
2.15
2.40
V
VUVHYST
Under-Voltage Lockout Hysteresis
250
mV
EN: Enable Pin
VIH
HIGH-Level Input Voltage
1.2
V
VIL
LOW-Level Input Voltage
0.4
V
REN
EN Pull-Down Resistance
200
300
400
k
Ω
tLO
EN Low Time for Dimming
VIN = 3.6V; See Figure 14
0.5
300.0
µs
tHI
Time Delay Between Steps
VIN = 3.6V; See Figure 14
0.5
µs
TSD
EN Low, Shutdown Pulse Width
VIN = 3.6V; from Falling Edge of EN
1
ms
Feedback and Reference
VFB
Feedback Voltage
ILED = 20mA from -40°C to +85°C,
2.7V ≤ VIN ≤ 5.5V
237
250
263
mV
IFB
Feedback Input Current
VFB = 250mV
0.1
1.0
μA
Power Outputs
RDS(ON)_Q1 Boost Switch On-Resistance
VIN = 3.6V, ISW = 100mA
600
m
Ω
VIN = 2.7V, ISW = 100mA
650
ISW(OFF)
SW Node Leakage
(2)
EN = 0, VIN = VSW = VOUT = 5.5V,
VLED = 0
0.1
2.0
μA
ILIM-PK
Boost Switch Peak Current Limit
VIN = 3.6V
750
mA
Oscillator
fSW
Boost Regulator Switching Frequency
1.0
1.2
1.4
MHz
Output and Protection
VOVP
Boost Output Over-Voltage Protection
22.5
24.5
V
OVP Hysteresis
1.0
VTLSC
VOUT Short Circuit Detection Threshold VOUT Falling
VIN – 1.4
V
VTHSC
VOUT Short Circuit Detection Threshold VOUT Rising
VIN – 1.2
V
DMAX
Maximum Boost Duty Cycle
(3,4)
85
%
DMIN
Minimum Boost Duty Cycle
(3,4)
20
%
TTSD
Thermal Shutdown
150
°C
THYS
Thermal Shutdown Hysteresis
35
°C
Notes:
2.
SW leakage current includes the leakage current of two internal switches; SW to GND and SW to VOUT.
3.
Not tested in production, but guaranteed by design
4.
Application should guarantee that minimum and maximum duty cycle fall between 20-85% to meet the specified range.


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