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FAN5340 데이터시트(PDF) 5 Page - Fairchild Semiconductor

부품명 FAN5340
상세설명  Synchronous Constant-Current Series Boost LED Driver with PWM Brightness Control and Integrated Load Disconnect
PDF  12 Pages
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제조업체  FAIRCHILD [Fairchild Semiconductor]
홈페이지  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5340 데이터시트(HTML) 5 Page - Fairchild Semiconductor

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© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5340 • Rev. 1.0.1
5
Electrical Specifications
VIN = 2.7V to 4.8V 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
IQ
Quiescent Current
EN = VIN, Device Not Switching
1
mA
ISD
Shutdown Supply Current
EN = GND, VIN = 3.6V
0.3
1.0
μA
VUVLO
Under-Voltage Lockout
VIN Rising
2.30
2.40
2.50
V
VIN Falling
2.00
2.15
2.25
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
tSD
EN Low to Shutdown Delay
From Falling Edge of EN
20
80
ms
Feedback and Reference
VFB
Feedback Voltage
480
500
520
mV
IFB
Feedback Input Current
VFB = 500mV
0.1
1.0
μA
Power Outputs
RDS(ON)_Q1 Boost Switch On-Resistance
VIN = 3.6V, VOUT = 10V, ISW = 100mA
600
m
Ω
VIN = 2.7V, VOUT = 10V, ISW = 100mA
850
RDS(ON)_Q2 Synchronous Rectifier On-Resistance
VOUT = 10V, ISW = 100mA
2.0
Ω
RDS(ON)_Q3 Load Switch On-Resistance
VOUT = 10V, ILED = 10mA
2.8
Ω
ISW(OFF)
SW Node Leakage
(2)
EN = 0, VIN = VSW = VOUT = 5.5V,
VLED = 0
0.1
1.0
μA
ILIM-PK
Boost Switch Peak Current Limit
VIN = 3.6V
325
400
475
mA
Oscillator
fSW
Boost Regulator Switching Frequency
1.0
1.2
1.4
MHz
PWM Dimming
DPWM
PWM Duty Cycle
(3)
PWM Dimming Frequency ≤1kHz
1.0
100
%
Output and Protection
VOVP
Boost Output Over-Voltage Protection
18.0
19.0
20.0
V
VOVPHYST OVP Hysteresis
0.8
V
VTHSC
VLED Short-Circuit Detection Threshold
VOUT Falling
VIN – 1.5
V
VOUT Rising
VIN – 1.3
V
DMAX
Maximum Boost Duty Cycle
(3)
85
%
DMIN
Minimum Boost Duty Cycle
(3)
20
%
TSD
Thermal Shutdown
150
°C
THYS
Thermal Shutdown Hysteresis
25
°C
Notes:
2.
SW leakage current includes the leakage current of three internal switches; SW to GND, VOUT to VLED, and SW to VOUT.
3.
Guaranteed by design.



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