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FAN5616 데이터시트(PDF) 5 Page - Fairchild Semiconductor

부품명 FAN5616
상세설명  High-Efficiency, Constant-Current LED Driver with Adaptive Charge Pump
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제조업체  FAIRCHILD [Fairchild Semiconductor]
홈페이지  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5616 데이터시트(HTML) 5 Page - Fairchild Semiconductor

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FAN5616 Rev. 1.0.0
Electrical Characteristics
Unless otherwise noted, VIN = 2.7V to 5.5V, ILED = 2mA to 20mA, EN1 = EN2 = HIGH, TA = -40°C to +85°C. Typical
values are at 25°C.
Notes:
1. Current Matching refers to the absolute value of the difference in the current between the two LED branches.
2. Efficiency is expressed as a ratio between the electrical power into the LEDs and the total power consumed from
the input power supply.
Some competitors calculate the efficiency as a function of VOUT instead of LED VF. Their method does not account
for the power lost due to the cathode voltage not being equal to zero. This method allows them to provide an
“improved” efficiency up to 5%.
Parameter
Conditions
Min
Typ
Max
Unit
Input Under-Voltage Lockout
VIN falling
1.6
V
VIN rising
2.3
ILED/ISET Ratio
VIN = 3.6V, IOUT = 15mA
240
255
270
ILED/ISET Ratio
ILED = 2 to 20mA
230
260
280
ILED/ISET Ratio
EN1 = HIGH, EN2 = LOW
86
EN1 = LOW, EN2 = HIGH
173
Current Matching with Unmatched
LEDs (Note 1)
2mA
≤ ILED ≤ 15mA
2.8V
≤ LED VF <4V
0.6
+3
%
Reference Voltage for Current Set
588
600
612
mV
Start Up time
COUT = 1µF, VIN = 3.6V,
ILED = 15mA
200
270
500
µS
Minimum Cathode Voltage
ILED = 15mA
170
250
mV
Quiescent Current
VIN = 5.5V, IOUT = 5mA
250
µA
Shutdown Supply Current
EN1 = EN2 = Logic “L”
0.1
1
µA
Output Short Circuit Current
VIN = 5.5V, VOUT = 0V
65
80
mA
VOUT Over-voltage Protection
6
V
VIN at Mode Transition from 1x to 1.5x
LED Vf = 3.5V, ILED = 3 x 20mA
3.9
V
VIN at Mode Transition from 1.5x to 2x
LED Vf = 3.5V, ILED = 3 x 20mA
2.9
V
Peak Efficiency (Note 2)
VIN = 3.75V, LED Vf = 3.4V,
ILED = 18mA
90
%
Oscillator Frequency
0.8
1
1.2
MHz
Thermal Shutdown Threshold
150
°C
Thermal Shutdown Hysteresis
15
°C
“EN1” Logic Input Low Voltage
0.4
V
“EN1” Logic Input High Voltage
1.6
V
“EN2” Logic Input Low Voltage
0.4
V
“EN2” Logic Input High Voltage
1.6
V
(
(
)
)
LEDj
LEDi
LEDj
LEDi
I
I
100
x
I
I
Current Matching (%)
+
, where i, j = 1, 2 or 3
IN
IN
3
1
i
LEDi
LEDi
I
x
V
I
x
V
Efficiency
=
Σ


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