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FAN5640 데이터시트(PDF) 4 Page - Fairchild Semiconductor

부품명 FAN5640
상세설명  FAN5640 Dual High-Side Constant Current Source for High-Voltage Keypad LED Illumination
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제조업체  FAIRCHILD [Fairchild Semiconductor]
홈페이지  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5640 데이터시트(HTML) 4 Page - Fairchild Semiconductor

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© 2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5640 • Rev. 1.0.2
4
Electrical Characteristics
VIN = 6V to 20V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C, VIN = 14V, ILED = 15mA.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
Power Supplies
VIN
Input Voltage Range
6
20
V
IQ
Quiescent Current
Measured at GND pin, VIN = 20V
48
65
µA
Measured at GND pin, VIN = 6V
44
55
ISD
Shutdown Supply Current
VIN = 20V, EN = GND
8
13
µA
VIN = 6V, EN = GND
5
8
VEN
Enable High-Level Input Voltage
1.2
V
Enable Low-Level Input Voltage
0.4
IEN
Enable Input Current
EN = 5V
9
15
µA
EN=GND
0.1
1.0
Regulation
ILIM1
Channel 1 Current Limit
(2)
30
mA
ILIM2
Channel 2 Current Limit
(2)
30
mA
∆IOUT
Output Current Accuracy
2.5mA < IOUT ≤ 5mA
(3)
-15
+15
%
5mA < IOUT ≤ 25mA
(3)
-10
+10
IMATCH
Channel-to-Channel Current Matching
(4)
-3
+3
%
VDO
Output Dropout Voltage
VIN – VOUT at 90% IOUT
Programmed IOUT = 25mA
1.80
2.50
V
VIN – VOUT at 90% IOUT
Programmed IOUT = 2.5mA
0.43
0.60
VREF
Reference Voltage
475
mV
IMIRROR
Current Mirror Ratio
IOUT / IRSET
275
∆IOUT/∆VIN Power Supply Current Dependency VOUT = VIN – 2V
(5)
0.5
2.0
%/V
TON
Turn-On Time
VIN=14V , IOUT=12.5mA
(6)
5
8
µs
TSD
Thermal Shutdown Protection
Rising Temperature
150
°C
Hysteresis
20
Notes:
2.
If only one channel is needed, IOUT1 can be tied to IOUT2 to boost maximum current to 50mA.
3.
REXT resistor tolerance adds to the specification limit of the pin RSET to determine overall current accuracy.
4.
Matching defined as [(IOUT1-IOUT2)/(IOUT1+IOUT2)]×100.
5.
VOUT is the total voltage drop across the LED string.
6.
Measured from EN crossing 1.8V to output current reaching 90% of target IOUT.


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