TCA62735AFLG [MARKTECH]
Charge Pump type DC/DC Converter for White LED Driver; 电荷泵型DC / DC转换器，用于白光LED驱动器
| 型号： | TCA62735AFLG |
| 厂家： | 
MARKTECH CORPORATE |
| 描述： | Charge Pump type DC/DC Converter for White LED Driver |
| 文件： | 总12页 (文件大小：375K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TCA62735AFLG
TOSHIBA 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.
Weight: 0.016 g (Typ.)
Characteristics
•
•
•
•
•
•
•
•
•
•
Fabricating with CMOS Process
Package : QFN16 (4mm × 4mm × 0.8mm)
Input Voltage : 2.8V (Min)
Output Voltage : 4.2V (Min)
Switching Frequency : 1MHz(Typ.)
Output Drive Current Capability : Greater than 120mA
4 Channels Built in Constant Sink Current Drivers
Sink Current Adjustment by External Resistance
Soft Start Function
Output Open Detection Function
•
Integrated protection circuit TSD (Thermal Shut Down)
Pin Assignment (top view)
Application Diagram
C2+
C2
C1+
C1–
EN
C1
1.0µF
1.0µF
C2–
GND
EN
VOUT
COUT
1.0µF
CTL0
CTL1
CTL2
CTL0
C2+
C2−
C1−
30mA
30mA
30mA
30mA
ILED1
ILED2
ILED3
ILED4
CTL1
CTL2
VIN=2.8~4.2V
VIN
CIN
2.2µF
GND
ISET
RSET
8kΩ
Company Headquarters
3 Northway Lane North
Latham, New York 12110
Toll Free: 800.984.5337
California Sales Office:
950 South Coast Drive, Suite 225
Costa Mesa, California 92626
Toll Free: 800.984.5337
Fax: 518.785.4725
Web: www.marktechopto.com | Email: info@marktechopto.com
Fax: 714.850.9314
TCA62735AFLG
TENTATIVE
Block Diagram
C2+
C2−
C1+
C1−
VIN
VOUT
Feed Back
Feed Back Circuit
Up Converting Time Change
ILED1
ON/OFF
EN
CTL0
CTL1
CTL2
ILED 2
ILED 3
ILED 4
Control
Logic
Constant Current
Regulator
GND
ISET
Explanation of Terminals
No
1
Symbol
EN
Function
Logic input terminal. (input a chip enable signal)
EN = ”H” → Operation mode, EN = ”L” → Shutdown mode
2
3
CTL0
CTL1
CTL2
ISET
VOUT
VIN
Logic input terminal. (Selection of an output number)
Please refer to the truth table on page 10.
4
5
Resistance connection terminal for setting up output current.
Output terminal.
6
7
Power supply terminal.
8
C1+
9
C1−
Capacitance connection terminal for charge pump.
GND terminal.
10
11
12
13
14
15
16
C2−
C2+
GND
ILED4
ILED3
ILED2
ILED1
Constant Sink Current Driver terminal.
ILED(mA) = 0.61V × 400 / RSET(kΩ)
This datasheet is tentative, the values and contents are subject to change without any notice.
2005-04-26 (Page 2 of 12)
TCA62735AFLG
TENTATIVE
Absolute Maximum Ratings (Topr = 25°C if without notice)
Characteristics
Symbol
Ratings
Unit
P o w e r S u p p l y V o l t a g e
VIN
Vin
−0.3~+6.0
−0.3~VIN+0.3(*1)
200
V
mA
mA/ch
°C
I n p u t
V o l t a g e
O u t p u t
C u r r e n t IOUT
O p e r a t i n g T e m p e r a t u r e
S t o r a g e T e m p e r a t u r e
J u n c t i o n T e m p e r a t u r e
Topr
Tstg
Tj
−40~+85
−55~+150
150
°C
°C
*1 : please do not exceed 6V.
Recommended Operating Condition (Topr=-40°C to 85°C if without notice)
Characteristics
P o w e r S u p p l y
Symbol
Test Condition
Min
Typ
Max
Unit
VIN
Vin
-
2.8
0
-
-
4.2
VIN
40
V
V
L o g i c I n p u t V o l t a g e
I n p u t R i p p l e V o l t a g e
Capacitance for Charge Pump
C a p a c i t a n c e f o r o u t p u t
C a p a c i t a n c e f o r i n p u t
EN,CTL0,CTL1,CTL2
-
-
-
-
-
VIN(ripple)
C1,C2
COUT
CIN
-
-
mVpp
µF
0.8
0.8
0.8
2
1.0
2.2
2.2
8
2.2
4.7
10.0
80
µF
µF
RSET
kΩ
R
r e s i s t a n c e
S
E T
Electrical Characteristics
DC-DC Regulator part (VIN=3.6V, Topr=-40 to 85°C, if it is not specified.)
C h a r a c t e r i s t i c s
Symbol
Test Condition
Min
Typ
Max
Unit
mA
2 time up converting
1.5 time up converting
1 time up converting
IOUT=5mA
120
120
120
-
-
-
-
-
O u t p u t C u r r e n t A b i l i t y
IOUT(MAX)
-
-
C o n s u m p t i o n C u r r e n t
Stand By Consumption Current
IIN(ON)
1
2
mA
IOUT=0mA
IIN(OFF)
-
0
1
µA
EN=”L”
EN, CTL0,CTL1,CTL2
VIN=2.8V to 4.2V
H
L
i
g
h
VIH
VIL
0.7VIN
-
-
-
L o g i c I n p u t
V o l t a g e
V
EN,CTL0,CTL1,CTL2
VIN=2.8V to 4.2V
o
w
-
-
0.3VIN
L o g i c I n p u t C u r r e n t
C l o c k F r e q u e n c y
Ileak
fOSC
RON
EN,CTL0,CTL1,CTL2
-
1000
5
0.1
-
µA
kHz
Ω
-
-
-
T
O
T
A
L
R
1.5 time up converting
O
N
10
LED Vf=3.6V,IOUT=80mA
VIN falling
1 X m o d e t o 1 . 5 X m o d e
t r a n s i t i o n v o l t a g e
VTRANS1X
-
4.0
-
V
This datasheet is tentative, the values and contents are subject to change without any notice.
2005-04-26 (Page 3 of 12)
TCA62735AFLG
TENTATIVE
Constant Current Driver part
(VIN=2.8V to 4.2V, Topr=-40 to 85°C, if it is not specified.)
Characteristics
Symbol
Test Condition
Min
Typ
Max
Unit
mA
RSET=47kΩ
RSET=12kΩ
RSET=8.2kΩ
RSET=8.2kΩ
-
5.1
19.6
28
-
-
-
-
Constant Current Drive Setting
ILED1~4
-
-
0.61
2.5
5
ISET Terminal Output Voltage
Constant Current Between Chs
VSET
|ILED-LED-ERR
-
-
V
%
%
|
－
－
－
－
A c c u r a c y
|ILED-ERR|
Between ICs
-
VIN=3.6V center
VIN=2.8 to 4.2V
Constant Sink Current
Supply Voltage Regulation
|∆ILED
|
1
－
－
－
%
I
OUT=80mA
CIN=2.2µF
EN="H"
ILED1 to4="OFF"
O u t p u t l e a k a g e c u r r e n t
ILEAK1~4
－
1
µA
Reference data
Efficiency vs. IOUT
Efficiency vs. VIN
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
VIN=3.0V
VIN=3.3V
VIN=3.6V
VIN=3.9V
VIN=4.2V
LED Vf=3.3V
4LEDs at 20mA LED Vf=3.51V
4.3 4.1 3.9 3.7 3.5 3.3 3.1 2.9 2.7
VIN (V)
0
20
40
60
80
100 120
IOUT (mA)
Quiescent Current vs. VIN
Quiescent Current vs. IOUT Current
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
4.0
VIN=2.7V
VIN=3.6V
VIN=4.3V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
4LEDs at 30mA
4LEDs at 20mA
4LEDs at 5mA
2.8
3.0
3.2
3.4
VIN (V)
3.6
3.8
4.0
4.2
20
40
60
80
100
120
IOUT Current (mA)
This datasheet is tentative, the values and contents are subject to change without any notice.
2005-04-26 (Page 4 of 12)
TCA62735AFLG
TENTATIVE
IOUT Current vs. VIN
ILED Current vs. VIN
160
140
120
100
80
40
35
30
25
20
15
10
5
4LEDs at 30mA
4LEDs at 20mA
4LEDs at 5mA
4LEDs at 30mA
4LEDs at 20mA
4LEDs at 5mA
60
40
20
0
0
2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2
VIN (V)
2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2
VIN (V)
1x Mode Transition Voltage vs. ILED Current
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
LED Vf=3.2V,4ch ON
LED Vf=3.4V,4ch ON
LED Vf=3.6V,4ch ON
5
10
15
20
25
30
ILED Current (mA)
Evaluation Circuit
VIN=2.8V to 4.2V
RSET=8.2kΩ to 47kΩ
A
CIN=2.2µF
V
C
OUT=1.0µF
C1=1.0µF
CTL2
CTL1
C1-
C2-
C2=1.0µF
CTL0
EN
C2+
GND
• Evaluation conditions
LED
CIN
: NACW215 (NICHIA Corp.)
V
: C1608JB1C225K (TDK Corp.)
: C1608JB1C105K (TDK Corp.)
: C1608JB1C105K (TDK Corp.)
: C1608JB1C105K (TDK Corp.)
COUT
C1
C2
A
This datasheet is tentative, the values and contents are subject to change without any notice.
2005-04-26 (Page 5 of 12)
TCA62735AFLG
TENTATIVE
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.
400 × 0.61[V]
ILED[mA] =
RSET[kΩ]
RSET vs. ILED
35
30
25
20
15
10
5
0
0
20
40
60
RSET（kΩ）
VIN=2.8V to 4.2V
RSET
CIN=2.2µF
COUT=1.0µF
C1=1.0µF
C2=1.0µF
C1-
C2-
CTL2
CTL1
CTL0
EN
C2+
GND
This datasheet is tentative, the values and contents are subject to change without any notice.
2005-04-26 (Page 6 of 12)
TCA62735AFLG
TENTATIVE
Method of Current Dimming control
1) Input PWM signal to SHDN terminal
ILED can be set according to the next expression.
0.61[V] × 400 × ON Duty[%]
ILED[mA] =
RSET[kΩ]
f
PWM will recommend 100Hz.
PWM Duty vs. IOUT
100
80
60
40
20
0
Ch1 : VPWM
Ch2 : IIN
Ch3 : VOUT
Ch4 : IOUT
0
20
40
60
80
100
PWM Duty (%)
VIN=3.6V
RSET=12kΩ
CIN=2.2µF
COUT=1.0µF
C1=1.0µF
CTL2
CTL1
C1-
C2-
C2=1.0µF
CTL0
EN
C2+
GND
PWM signal
PWM=100Hz, ON Duty50%
f
*In this PWM control operation, This IC repeats ON/OFF. In this result, rush current is occur when ON timing with
supplying charge to C . Please note it.
2OUT
This datasheet is tentative, the values and contents are subject to change without any notice.
2005-04-26 (Page 7 of 12)
TCA62735AFLG
TENTATIVE
2) Input analog voltage to ISET terminal
1. Precondition
• Please set the range of the analog voltage input by 0 to 0.61V.
2. The maximum current is defined as αmA.
R1[kΩ] + R2[kΩ]
α[mA] = 0.61[V] ×
× 400
R1[kΩ] × R2[kΩ]
3. A minimum current is defined as βmA.
β[mA] = 0.61[V] ×
1
× 400
R2[kΩ]
4. ILED can be set according to the next expression.
β[mA] - α[mA]
0.61[V]
ILED[mA] = VADJ[V] ×
+ α[mA]
ILED vs. VADJ
25
20
15
10
5
0
0
0.2
0.4
0.6
VADJ (V)
VADJ=0V to 0.61V
VIN=2.8V to 4.2V
R2=47kΩ
R1=16kΩ
CIN=2.2µF
C
OUT=1.0µF
C1=1.0µF
C2=1.0µF
CTL2
CTL1
C1-
C2-
CTL0
EN
C2+
GND
*This method is without repeating IC ON/OFF, and no need to consider holding rash current.
This datasheet is tentative, the values and contents are subject to change without any notice.
2005-04-26 (Page 8 of 12)
TCA62735AFLG
TENTATIVE
3) Input Logic signal
User can adjust ILED with Logic signal input as indicated in recommended circuit.
The Resistor connected the ON-State Nch MOS Drain and RSET determines ILED.
ILED can be set according to the next expression.
400 × 0.61[V]
ILED[mA] =
R[kΩ]
About combined resistance R[kΩ]
M1
M2
R[kΩ]
RSET[kΩ] × R1[kΩ] × R2[kΩ]
ON
ON
R1[kΩ]×RSET[kΩ]
+
R2[kΩ]×RSET[kΩ]
+ R1[kΩ]×R2[kΩ]
RSET[kΩ] × R1[kΩ]
RSET[kΩ] + R1[kΩ]
ON
OFF
OFF
OFF
ON
RSET[kΩ] × R2[kΩ]
RSET[kΩ] + R2[kΩ]
RSET[kΩ]
OFF
R2
R1
M2
M1
RSET
VIN=2.8V to 4.2V
CIN=2.2µF
COUT=1.0µF
C1=1.0µF
C2=1.0µF
CTL2
CTL1
C1-
C2-
CTL0
EN
C2+
GND
*This method is without repeating IC ON/OFF, and no need to consider holding rash current.
This datasheet is tentative, the values and contents are subject to change without any notice.
2005-04-26 (Page 9 of 12)
TCA62735AFLG
TENTATIVE
Selection of an output number by CTL0, CTL1, and CTL2 Terminal
Truth Table
Input
Output
CTL2
L
CTL1
L
CTL0
L
EN
H
H
H
H
H
H
H
H
L
ILED4
OFF
OFF
OFF
ON
ILED3
OFF
OFF
ON
ILED2
OFF
ON
ILED1
ON
L
L
H
L
OFF
OFF
OFF
ON
L
H
H
L
OFF
OFF
ON
L
H
L
OFF
OFF
ON
H
H
H
H
L
OFF
OFF
ON
L
H
L
ON
ON
H
H
L
ON
ON
ON
H
L
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
L
L
H
L
L
L
H
H
L
L
L
H
L
L
H
H
H
H
L
L
H
L
L
H
H
L
H
L
*Soft Start Function
This device is integrated Soft start function. When the power supply is ON or output is started to operate, the transition
time is controlled in order to decrease the rush current. (Reference data: The output voltage is time 200µs of made from
0 to 4.0V at the VIN=2.8V time.)
*Inrush Current of Input Current
The inrush current flows when start-up and mode switching. (Reference data: Inrush current at CE1/CE2="L" to “H” is
500mA.)
*Thermal Shut Down Function
This device has Thermal Shutdown Function to protect from thermal damage when the output is shorted.
The temperature to operate this function is set around from 140 to 160°C. (This is not guaranteed Value.)
*The Selection of Capacitor for Charge Pump, Input and Output
The input capacitor is effective to decrease the impedance of power supply and also input current is averaged.
The input capacitor should be selected by impedance of power supply, it is better to choose with lower ESR
(Equivalent Series Resistor). (i.e. ceramic capacitor etc.) Regarding to the capacitance values, it is recommended to
choose in the range from 0.8 µF to 10 µF, however larger than 2.2 µF should be better.
The output capacitor is effective to decrease the ripple noise of the output line. Also, it is better to choose the
capacitor.) Regarding to the capacitance values, it is recommended to
choose in the range from 0.8 µF to 4.7 µF, however larger than 2.2 µF should be better.
The capacitor for charge pump operation is also selected the capacitor with low ESR. .) Regarding to the
capacitance values, it is recommended to choose in the range from 0.8 µF to 2.2 µF, however larger than 1.0 µF should
be better.
This datasheet is tentative, the values and contents are subject to change without any notice.
2005-04-26 (Page 10 of 12)
TCA62735AFLG
TENTATIVE
Package Dimensions
QFN16
Unit : mm
4.00Typ.
3.75Typ.
0.9MAX
+ 0.07
0.05
0.28
-
0.25MIN
+ 0.15
0.10
0.60
-
0.65Typ.
Weight: 0.016 g (Typ.)
This datasheet is tentative, the values and contents are subject to change without any notice.
2005-04-26 (Page 11 of 12)
TCA62735AFLG
TENTATIVE
Regarding solder ability
Regarding solder ability, the following conditions have been confirmed.
● Solder ability
(1) Use of Sn-63Pb solder bath
• solder bath temperature = 230°C, dipping time = 5 seconds, number of times = once, use of R-type flux
(2) Use of Sn-3.0Ag-0.5Cu solder bath
• solder bath temperature = 245°C, dipping time = 5 seconds, number of times = once, use of R-type flux
NOTES
• Utmost care is necessary in the design of the output line, VCC, COMMON
and GND line since IC may be destroyed due to short-circuit between outputs,
air contamination fault, or fault by improper grounding.
• Do not insert devices in the wrong orientation. Make sure that the positive and
negative terminals of power supplies are connected correctly. Otherwise, the
rated maximum current of power dissipation may be exceeded and the device
may break down or undergo performance degradation, causing it to catch fire
or explode and resulting in injury.
• Please take care that IC might be destroyed in case external components were
destroyed or not connected exactly.
RESTRICTIONS ON PRODUCT USE
030619EBA
• The information contained herein is subject to change without notice.
• The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which
may result from its use. No license is granted by implication or otherwise under any patent or patent rights of
TOSHIBA or others.
• TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc..
• The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer’s own risk.
• The products described in this document are subject to the foreign exchange and foreign trade laws.
• TOSHIBA products should not be embedded to the downstream products which are prohibited to be produced
and sold, under any law and regulations.
This datasheet is tentative, the values and contents are subject to change without any notice.
2005-04-26 (Page 12 of 12)
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