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PDF TK65600B-G Data sheet ( Hoja de datos )
| Número de pieza | TK65600B-G | |
| Descripción | CMOS White Led Driver IC | |
| Fabricantes | Toko | |
| Logotipo |  |
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APPLICATION MANUAL
CMOS White LED Driver IC
TK65600B, B-G
CONTENTS
1 . DESCRIPTION
2 . FEATURES
3 . APPLICATIONS
4 . PIN CONFIGURATION
5 . PACKAGE OUTLINE
6 . BLOCK DIAGRAM
7 . ABSOLUTE MAXIMUM RATINGS
8 . ELECTRICAL CHARACTERISTICS
9 . TEST CIRCUIT
10 . TYPICAL CHARACTERISTICS
11 . PIN DESCRIPTION
12 . APPLICATIONS INFORMATION
13 . NOTES
14. OFFICES
2
2
2
2
2
3
3
4
5
5
8
8
16
16
GC3-K016
MEETING YOUR NEEDS
Page 1
1 page  
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9. TEST CIRCUIT
TK65600B, B-G
AGND A1
VDD B1
ENABLE
A2
A3 N/C
B3 FB
1uF
1uF VOUT C1
C3 PGND 33ohm
22uH D3313FB TOKO
10. TYPICAL CHARACTERISTICS
502.5
502.0
501.5
501.0
500.5
500.0
499.5
499.0
498.5
498.0
497.5
2 .7
Feedback Voltage vs.
Supply Voltage
3.3 3.9 4.5 5.1
Supply Voltage (V)
C2
IND
502.5
Feedback Voltage vs.
Temperature
502.0
501.5
501.0
500.5
500.0
499.5
499.0
498.5
498.0
497.5
-50 -25 0 25 50 75 100 125
Temperatur e (°C)
GC3-K016
Page 5
5 Page 
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TK65600B, B-G
12-2. Circuit Board Layout
As with all switching power converters, care should be given to the circuit board layout. The bolded lines, on the
schematic in Figure 1, show where the high current paths of switched currents are in the circuit. The circuit board traces
for these paths should be short and wide to minimize the power losses and electromagnetic interference generated from
the switching currents. Therefore Cin , L and Cout should be located close to the IC in the circuit board layout. Also, the
circuit board layout should keep the sense resistor close to the IC such that there is no voltage differences in the ground
references.
Figure 1: High Current Switching Paths in Step-up Converter
12-3. Inductor Selection
The inductor is the main energy storage element used in boosting the output voltage to drive the white LEDs. This
requires that the inductor be properly selected to match the output power requirements of the white LEDs to be driven in
a given application. Also, selecting an inductor larger than needs be for a given application can be a waste of precious
board space in a small mobile product. Presently, a good inductor matched to be used with this IC (except in output
power applications over about 480mW) is TOKO’s 22uH D3313FU type inductor.
GC3-K016
Page 11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet TK65600B-G.PDF ] | |
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