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PDF TCA62735AFLG Data sheet ( Hoja de datos )
| Número de pieza | TCA62735AFLG | |
| Descripción | Charge Pump type DC/DC Converter | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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TCA62735AFLG
www.DataSheetT4UO.coSmHIBA CMOS INTEGRATED CIRCIUTS SILICON MONOLITHIC
TCA62735AFLG
Charge Pump type DC/DC Converter for White LED Driver
The TCA62735AFLG is a charge pump type DC/DC Converter
specially designed for constant current driving of White LED.
This IC can outputs LED current 120mA or more to 2.8-4.2V input.
This IC observes the power-supply voltage and the output voltage,
and does an automatic change to the best of step up mode 1, 1.5 or
2 times. It is possible to prolong the battery longevity to its
maximum.
This IC is especially for driving back light white LEDs in LCD of PDA,
Cellular Phone, or Handy Terminal Equipment.
This device is Pb-free product.
VQFN16-P-0404-0.65
Weight: 0.016 g (Typ.)
Characteristics
• Fabricating with CMOS Process
• Package : VQFN16-P-0404-0.65
• Input Voltage : 2.8V (Min)
• Switching Frequency : 1MHz (Typ.)
• Output Drive Current Capability : Greater than 120mA
• 4 Channels Built in Constant Sink Current Drivers (3 or 4 LEDs can be driven.)
• Sink Current Adjustment by External Resistance
• Soft Start Function
• Output Open Detection Function
• Thermal Shut Down Function (TSD)
1/18 2007-06-21
1 page  
TCA62735AFLG
www.DaAtaSbhseoet4luU.tceomMaximum Ratings (Ta = 25°C if without notice)
Characteristics
Symbol
Ratings
Power Supply Voltage
Input Voltage
Output Current
Operating Temperature
Storage Temperature
Junction Temperature
*1 : please do not exceed 6V.
VIN
VIN(LOGIC)
IOUT
Topr
Tstg
Tj
−0.3~+6.0
−0.3~VIN+0.3(*1)
200
−40~+85
−55~+150
150
Recommended Operating Condition (Ta=-40°C to 85°C if without notice)
Characteristics
Symbol
Test Condition
Min Typ
Power Supply
Logic Input Voltage
Capacitance for Charge Pump
Capacitance for output
Capacitance for input
RSET resistance
VIN
VIN(LOGIC)
C1,C2
COUT
CIN
RSET
-
EN,CTL0,CTL1,CTL2
-
-
-
-
2.8 -
0-
0.8 1.0
0.8 1.0
0.8 2.2
8.2 12
Unit
V
mA
mA/ch
°C
°C
°C
Max Unit
4.2
VIN
2.2
4.7
10.0
47
V
V
µF
µF
µF
kΩ
Electrical Characteristics
DC-DC Regulator part (VIN=3.6V, Ta=25°C, if it is not specified.)
C h a r a c t e r i s t i c s Symbol
Test
Circuits
Test Condition
Min Typ Max Unit
2 time up converting
120 -
-
O u t p u t C u r r e n t A b i l i t y IOUT(MAX)
1
1.5 time up converting
120 -
- mA
1 time up converting
120 -
-
Consumption Current
Stand By Consumption Current
H
Logic Input
VoltageL
ig
o
h
w
Logic Input Current
Clock Frequency
TOTAL
RON
1X mode to 1.5X mode
transition voltage
IIN(ON)
IIN(OFF)
VIH
VIL
Ileak
fOSC
RON
VTRANS1X
2
2
3
3
3
4
1
4
EN=”H”, RSET=47kΩ
EN=”L”
EN, CTL0,CTL1,CTL2
VIN=2.8V~4.2V
EN,CTL0,CTL1,CTL2
VIN=2.8V~4.2V
EN,CTL0,CTL1,CTL2
-
1.5 time up converting
LED Vf=3.6V, RSET=12kΩ
VIN falling
- 1 2 mA
- 0 1 µA
0.7VIN -
-
V
- - 0.3VIN
- - 0.1 µA
- 1000 - kHz
- 5 10 Ω
- 4.0 -
V
Constant Current Driver part (VIN=3.6V, Ta=25°C, if it is not specified.)
Characteristics
Symbol
Test
Circuits
Test Condition
Min Typ Max Unit
RSET=47kΩ
- 5.1 -
Constant Current Drive Setting ILED1~4
5
RSET=12kΩ
- 19.6 - mA
RSET=8.2kΩ
- 28 -
ISET Terminal Output Voltage
VSET
5
RSET=8.2kΩ
- 0.61 -
V
Constant Current Between Chs |ILED-LED-ERR|
5
-
2.5 %
A c c u r a c y Between ICs
Constant Sink Current
Supply Voltage Regulation
|ILED-ERR|
|∆ILED|
5-
5
VIN=3.6V center,VIN=2.8~4.2V
IOUT=80mA
5
1
%
%
O u t p u t l e a k a g e c u r r e n t ILEAK1~4
5
EN="L"
1 µA
5/18 2007-06-21
5 Page 
www.DataSheet4U.com
TCA62735AFLG
Method of setting ILED
The current of the terminal ILED1 to 4 is set by resistance RSET connected with the terminal ISET.
ILED can be set according to the next expression.
ILED[mA] =
400 × 0.61[V]
RSET[kΩ]
35
30
25
20
15
10
5
0
0
RSET vs ILED
5 10 15 20 25 30 35 40 45 50
RSET(kΩ)
C1=1.0µF
C2=1.0µF
C1-
C2-
C2+
GND
RSET
COUT=1.0µF
VIN=2.8V~4.2V
CIN=2.2µF
CTL2
CTL1
CTL0
EN
11/18
2007-06-21
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet TCA62735AFLG.PDF ] | |
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