W-6137TD-G3 [NIDEC]
CMOS Boost Converter;
| 型号： | W-6137TD-G3 |
| 厂家： | 
NIDEC COMPONENTS |
| 描述： | CMOS Boost Converter |
| 文件： | 总16页 (文件大小：182K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
W-6137
CMOS Boost Converter -
White LED Driver
Description
The W-6137 is a DC/DC step-up converter that delivers a
regulated output current. Operation at a constant switching frequency
of 1 MHz allows the device to be used with small value external
ceramic capacitors and inductor.
The device drives a string of white LEDs connected in series and
provides the regulated current to control the LEDs with inherent
uniform brightness and matching. An external resistor R1 sets the
output current and allows up to 30 mA current to be supported over a
wide range of input supply voltages from 2.2 V to 5.5 V, making the
device ideal for battery-powered applications.
5
1
TSOTï23
LED dimming can be done by using a DC voltage, a logic signal, or
a pulse width modulation (PWM) signal. The shutdown control pin
allows the device to be placed in power-down mode with “zero”
quiescent current.
In addition to thermal protection and overload current limiting, the
device also enters a very low power operating mode during “Open
LED” fault conditions. The device is housed in a low profile (1 mm
max height) 5ïlead thin SOT23 package for space critical
applications.
PIN CONNECTIONS
1
VIN
SW
*1'
FB
SHDN
(Top View)
MARKING DIAGRAMS
Features
v Drives up to 5 White LEDs from 3 V
v Power Efficiency up to 87%
UEYM
v Low Quiescent Ground Current 0.1 mA
v Adjustable Output Current (up to 30 mA)
v High Frequency 1 MHz Operation
v “Zero” Current Shutdown Mode
v Operates Down to 2 V (from Two AA Batteries)
v Soft Start Powerïup
8(ꢅ ꢅ:ꢀꢁꢂꢃꢄ7'ï*7ꢃ
Y = Production Year (Last Digit)
M = Production Month (1ï9, A, B, C or O, N, D)
v Open LED Low Power Mode
ORDERING INFORMATION
v Automatic Shutdown at 1.9 V (UVLO)
v Thermal Shutdown Protection
v Thin SOT23 5ïlead (1 mm Max Height)
v These Devices are PbïFree, Halogen Free/BFR Free and are RoHS
Compliant
Device
Package
Shipping
TSOTï23
(PbïFree)
3,000/
:ꢀꢁꢂꢃꢄ7'ï*7ꢃ
(Note 1)
Tape & Reel
NiPdAu Plated Finish (RoHSïcompliant)
1.
Applications
v LCD Backlighting
v Cellular Phones
v Handheld Devices
v Digital Cameras
¢ NIDEC COPAL ELECTRONICS CORP.ꢀ
'HFHPEHU,ꢀ201ꢁꢀïꢀRev. ꢂ
1
Publication Order Number:ꢀ
W-6137/(
W-6137
L
D
V
IN
V
OUT
22
H
2.2 to
5.5 V
C2
F
C1
1
SW
F
0.22
VIN
W-6137
SHDN
GND
OFF
FB
ON
V
FB
= 300 mV
R1
15
L: Murata LQH32CN220
D: Central CMDSH2-3 (rated 30 V)
Figure 1. Typical Application Circuit
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter
Rating
ï0.3 to +7
ï0.3 to +7
ï0.3 to +40
ï65 to +160
ï40 to +150
300
Unit
V
VIN, FB voltage
SHDN voltage
V
SW voltage
V
Storage Temperature Range
Junction Temperature Range
Lead Temperature
C
C
C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 2. RECOMMENDED OPERATING CONDITIONS
Parameter
Range
2.2 to 5.5
0 to 24
Unit
V
VIN
SW pin voltage
V
Ambient Temperature Range
LED Bias Current
ï40 to +85
1 to 30
C
mA
2
W-6137
Table 3. ELECTRICAL OPERATING CHARACTERISTICS
(V = 3.6 V, ambient temperature of 25$C (over recommended operating conditions unless otherwise specified))
IN
Symbol
Parameter
Operating Current
Conditions
= 0.3 V
Min
Typ
Max
Unit
I
Q
V
FB
V
FB
0.4
0.1
1.5
0.3
mA
= 0.4 V (not switching)
I
Shutdown Current
FB Pin Voltage
V
= 0 V
0.1
300
0.1
1
315
1
A
mV
A
SD
SHDN
V
3 LEDs with I
= 20 mA
285
FB
FB
LED
I
FB pin input leakage
Programmed LED Current
I
R1 = 10
R1 = 15
R1 = 20
28.5
19
30
20
15
31.5
21
mA
LED
14.25
15.75
V
SHDN Logic High
SHDN Logic Low
Enable Threshold Level
0.8
0.7
1.5
V
IH
V
Shutdown Threshold Level
0.4
0.7
IL
F
Switching Frequency
Switch Current Limit
Switch “On” Resistance
Switch Leakage Current
Thermal Shutdown
1.0
300
1.0
1
1.3
400
2.0
5
MHz
mA
SW
LIM
I
250
R
I
= 100 mA
SW
SW
I
Switch Off, V
= 5 V
A
$C
$C
%
V
LEAK
SW
T
SD
150
20
T
HYS
Thermal Hysteresis
Efficiency
Typical Application Circuit
“Open LED” fault
86
V
Undervoltage Lockout (UVLO) Threshold
Output Clamp Voltage
1.9
29
UVLO
V
V
OV-SW
3
W-6137
TYPICAL CHARACTERISTICS
(V = 3.6 V, C = 1.0 F, C
= 0.22 F, L = 22 H with 3 LEDs at 20 mA, T
= 25$C, unless otherwise specified.)
AMB
IN
IN
OUT
120
100
80
1.00
VFB = 0.4 V
0.75
0.50
60
40
0.25
0
20
0
2.5
2.5
2.5
3.0
3.5
4.0
4.5
5.0
5.0
4.5
2.5
3.0
3.5
4.0
4.5
5.0
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Figure 2. Quiescent Current vs. V
(Not Switching)
Figure 3. Quiescent Current vs. V
(Switching)
IN
IN
310
305
310
305
300
3 LEDs
3 LEDs
300
295
290
295
290
3.0
3.5
4.0
4.5
0
5
10
OUTPUT CURRENT (mA)
Figure 5. FB Pin Voltage vs. Output Current
15
20
25
30
INPUT VOLTAGE (V)
Figure 4. FB Pin Voltage vs. Supply Voltage
1.10
1.05
1.00
2.0
1.5
1.0
3 LEDs at 20 mA
0.95
0.90
0.5
0
3.0
3.5
4.0
2.5
3.0
3.5
4.0
4.5
5.0
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Figure 6. Switching Frequency vs. Supply
Voltage
Figure 7. Switch ON Resistance vs.
Input Voltage
4
W-6137
TYPICAL CHARACTERISTICS
(V = 3.6 V, C = 1.0 F, C
= 0.22 F, L = 22 H with 3 LEDs at 20 mA, T
= 25$C, unless otherwise specified.)
AMB
IN
IN
OUT
35
30
0.4
R
= 10
FB
0.2
0
25
20
15
10
R
R
= 15
= 20
FB
FB
ï0.2
ï0.4
5
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.0
5.0
2.0
2.5
3.0
INPUT VOLTAGE (V)
Figure 9. LED Current Regulation
3.5
4.0
4.5
5.0
5.5
30
30
INPUT VOLTAGE (V)
Figure 8. LED Current vs. Input Voltage
(3 LEDs)
100
90
100
90
VIN = 4.2 V
VIN = 3.6 V
15 mA
80
80
20 mA
70
60
70
60
2.0
2.5
3.0
3.5
4.0
4.5
0
5
10
15
20
25
INPUT VOLTAGE (V)
LED CURRENT (mA)
Figure 10. Efficiency across Supply Voltage
(3 LEDs)
Figure 11. Efficiency across Load Current
(3 LEDs)
100
100
90
90
80
VIN = 4.2 V
VIN = 3.6 V
15 mA
20 mA
80
70
60
70
60
2.0
2.5
3.0
3.5
4.0
4.5
0
5
10
15
20
25
INPUT VOLTAGE (V)
LED CURRENT (mA)
Figure 12. Efficiency across Supply Voltage
(4 LEDs)
Figure 13. Efficiency across Load Current
(4 LEDs)
5
W-6137
TYPICAL CHARACTERISTICS
(V = 3.6 V, C = 1.0 F, C
= 0.22 F, L = 22 H with 3 LEDs at 20 mA, T
= 25$C, unless otherwise specified.)
AMB
IN
IN
OUT
304
302
1.0
ï40$C
25$C
85$C
0.8
0.6
300
298
3 LEDs at 20 mA
0.4
296
294
0.2
ï50
ï25
0
25
TEMPERATURE ($C)
Figure 14. FB Pin Voltage vs. Temperature
50
75
100
3.0
3.5
4.0
4.5
5.0
INPUT VOLTAGE (V)
Figure 15. Shutdown Voltage vs. Input Voltage
2.2
2.1
1.10
1.05
1.00
20 mA per LED
2.0
1.9
1.8
0.95
0.90
1.7
1.6
ï50
ï25
0
25
50
75
100
ï50
ï25
0
25
50
75
100
TEMPERATURE ($C)
TEMPERATURE ($C)
Figure 16. Under Voltage Lock Out vs.
Temperature
Figure 17. Switching Frequency vs.
Temperature
Figure 18. Switching Waveforms
(3 LEDs in Series)
Figure 19. Switching Waveforms
(2 LEDs in Series)
6
W-6137
TYPICAL CHARACTERISTICS
(V = 3.6 V, C = 1.0 F, C
= 0.22 F, L = 22 H with 3 LEDs at 20 mA, T
= 25$C, unless otherwise specified.)
IN
IN
OUT
AMB
Figure 20. Powerïup with 3 LEDs at 20 mA
Figure 21. Line Transient Response
(3 V ï 5.5 V)
140
120
100
80
VOUT = 10 V
60
VOUT = 17 V
40
20
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
Figure 22. Maximum Output Current vs. Input
Voltage
7
W-6137
Pin Description
VIN is the supply input for the internal logic. The device is
compatible with supply voltages down to 2.2 V and up to
5.5 V. A small bypass ceramic capacitor of 1 F is
recommended between the VIN and GND pins near the
device. The underïvoltage lockout (UVLO) circuitry will
place the device into an idle mode (not switching) whenever
the supply falls below 1.9 V.
SW pin is the drain terminal of the internal low resistance
power switch. The inductor and the Schottky diode anode
should be connected to the SW pin. Traces going to the SW
pin should be as short as possible with minimum loop area.
This pin contains over-voltage circuitry which becomes
active above 24 V. In the event of an “OpenïLed” fault
condition, the device will enter a low power mode and the
SW pin will be clamped to approximately 30 V.
SHDN is the shutdown logic input. When the pin voltage is
taken below 0.4 V, the device immediately enters shutdown
mode, drawing nearly zero current. At voltages greater than
1.5 V, the device becomes fully enabled and operational.
FB feedback pin is regulated at 0.3 V. A resistor connected
between the FB pin and ground sets the LED current
according to the formula:
GND is the ground reference pin. This pin should be
connected directly to the ground plane on the PCB.
0.3 V
ILED
R1
The lower LED cathode is connected to the FB pin.
Table 4. PIN DESCRIPTIONS
Pin #
Name
Function
1
2
3
4
5
SW
Switch pin. This is the drain of the internal power switch.
GND
FB
Ground pin. Connect the pin to the ground plane.
Feedback pin. Connect to the last LED cathode.
Shutdown pin (Logic Low). Set high to enable the driver.
Power Supply input.
SHDN
VIN
8
W-6137
Device Operation
The W-6137 is a fixed frequency (1 MHz), low noise,
inductive boost converter providing constant current to the
load. A high voltage internal CMOS power switch is used to
energize the external inductor. When the power switch is
then turned off, the stored energy inductor is released into
the load via the external Schottky diode.
While in normal operation, the device will comfortably
deliver up to 30 mA of bias current into a string of up to 5
white LEDs.
In the event of a “Open-Led” fault condition, where the
feedback control loop becomes open, the output voltage will
continue to increase. Once this voltage exceeds 24 V, an
internal protection circuit will become active and place the
device into a very low power safe operating mode. In
addition, an internal clamping circuit will limit the peak
output voltage to 29 V. If this fault condition is repaired, the
device will automatically resume normal operation.
Thermal overload protection circuitry has been included
to prevent the device from operating at unsafe junction
temperatures above 150$C. In the event of a thermal
overload condition the device will automatically shutdown
and wait till the junction temperatures cools to 130$C before
normal operation is resumed.
The on/off duty cycle of the power switch is internally
adjusted and controlled to maintain a constant regulated
voltage of 0.3 V across the external feedback resistor
connected to the feedback pin (FB). The value of external
resistor will accurately set the LED bias current accordingly
(0.3 V/R1).
During the initial power-up stage, the duty cycle of the
internal power switch is limited to prevent excessive in-rush
currents and thereby provide a “soft-start” mode of
operation.
V
IN
V
OUT
SW
C2
C1
Over Voltage
1 MHz
Oscillator
Protection
300 mV
–
+
V
REF
Driver
V
IN
A
1
+
–
I
LED
PWM &
Logic
A
2
R
C
Enable
C
N
1
C
Thermal
Shutdown
& UVLO
+
–
SHDN
R
S
GND
Current
Sense
FB
R1
15
Figure 23. Block Diagram
9
W-6137
Application Information
External Component Selection
Schottky Diode
The current rating of the Schottky diode must exceed the
peak current flowing through it. The Schottky diode
performance is rated in terms of its forward voltage at a
given current. In order to achieve the best efficiency, this
forward voltage should be as low as possible. The response
time is also critical since the driver is operating at 1 MHz.
Central Semiconductor Schottky CMDSH2ï3 (200 mA
rated) or the CMDSHï3 (100 mA rated) is recommended for
most applications.
Capacitors
The W-6137 only requires small ceramic capacitors of
1 F on the input and 0.22 F on the output. The output
capacitor should be rated at 30 V or greater. Under normal
conditions, a 1 F input capacitor is sufficient. For
applications with higher output power, a larger input
capacitor of 2.2 F or 4.7 F may be appropriate. X5R and
X7R capacitor types are ideal due to their stability across
temperature range.
LED Current Setting
Inductor
The LED current is set by the external resistor between the
feedback pin (FB) and ground. The formula below gives the
relationship between the resistor and the current:
A 22 H inductor is recommended for most of the
W-6137 applications. In cases where the efficiency is
critical, inductances with lower series resistance are
preferred. Several inductor types from various vendors can
be used. Figure 24 shows how different inductor types affect
the efficiency across the load range.
0.3 V
LED current
R1
Table 5. RESISTOR R1 AND LED CURRENT
100
LED Current (mA)
R1 ( )
3 LEDs
VIN = 3.6 V
5
60
90
10
15
20
25
30
30
20
15
80
12
SUMIDA CDRH3D16ï220
MURATA LQH32CN220
PANASONIC ELJïEA220
10
70
PANASONIC ELJïPC220
60
5
10
15
LED CURRENT (mA)
Figure 24. Efficiency for Various Inductors
20
25
30
10
W-6137
Typical Applications
L
D
For best performance, a 33 H inductor and a 1 F output
V
V
OUT
IN
capacitor are recommended for 2ïLED applications.
In ꢀï/(' configuration, the W-6137 can be powered
from two AA alkaline cells or from a Liïion battery.
33
H
2.2 V to
5.0 V
C2
C1
SW
100
1
F
1
F
VIN
W-6137
20 mA
95
V
FB
= 300 mV
OFF
SHDN
FB
ON
90
85
80
VIN = 3.6 V
VIN = 3.0 V
GND
R1
15
L: Sumida CDRH3D16ï330
D: Central CMDSH2-3 (rated 30 V)
C2: Taiyo Yuden GMK212BJ105KG-T (rated 35 V)
75
70
Figure 25. W-6137 Driving Two LEDs
0
10
20
30
40
LED CURRENT (mA)
Figure 26. Efficiency vs. LED Current, Two LEDs
11
W-6137
Dimming Control
Filtered PWM Signal
There are several methods available to control the LED
brightness.
A filtered PWM signal can be used as a variable DC
voltage that can be used to control the LED current.
Figure 29 shows the PWM control circuitry connected to the
W-6137 FB pin. The PWM signal has a voltage swing of
0 V to 2.5 V. The LED current can be dimmed within a range
from 0 to 22 mA. The PWM signal frequency can vary from
very low frequency up to 100 kHz.
PWM Signal on the SHDN Pin
LED brightness dimming can be done by applying a PWM
signal to the SHDN input. The LED current is repetitively
turned on and off, so that the average current is proportional
to the duty cycle. A 100% duty cycle, with SHDN always
high, corresponds to the LEDs at nominal current.
Figures 27 and 28 show 1 kHz and 4 kHz signals with a 50%
duty cycle applied to the SHDN pin. The PWM frequency
range is from 100 Hz to 10 kHz. The recommended PWM
frequency range is from 100 Hz to 4 kHz.
VIN
SW
W-6137
LED
SHDN
GND
Current
FB
Switching Waveforms PWM on SHDN
PWM
Signal
R
A
V
FB
= 300 mV
R
2.5 V
0 V
4.02 k
V
IN
B
R2
1 k
3.3 k
R1
15
C1
0.22 +F
Figure 29. Circuit for Filtered PWM Signal
A PWM signal at 0 V DC, or a 0% duty cycle, results in
a max LED current of about 22 mA. A PWM signal with a
100% duty cycle results in an LED current of 0 mA.
25
20
15
10
Figure 27. PWM at 1 kHz
5
0
0
20
40
DUTY CYCLE (%)
Figure 30. LED Current vs. Duty Cycle
60
80
100
Figure 28. PWM at 4 kHz
12
W-6137
Open LED Protection
In the event of an “Open LED” fault condition, the
W-6137 will continue to boost the output voltage with
maximum power until the output voltage reaches
approximately 24 V. Once the output exceeds this level,
internal circuitry immediately places the device into a very
low power mode where the total input power consumed is
less than 10 mW.
In low power mode, the input supply current will typically
drop to 2 mA. An internal clamping circuit will limit the
subsequent output voltage to approximately 29 V. This
operating mode eliminates the need for any external
protection zener diode. This protection scheme also fully
protects the device against any malfunction in the external
Schottky diode (open-circuit).
(Central CMDSH2ï3)
L
D
V
OUT
V
IN
22 +H
C1
1 +F
C2
0.22 +F
SW
VIN
W-6137
SHDN
GND
V
FB
= 300 mV
OFF
FB
ON
R1
15
Figure 31. Open LED Protection
Figure 32. Open LED Powerïup Waveforms
2.5
2.0
1.5
1.0
2.5
3.0
3.5
INPUT VOLTAGE (V)
Figure 33. Open LED Supply Current vs. VIN
4.0
4.5
5.0
13
W-6137
Board Layout
The W-6137 is a high-frequency switching regulator.
Traces carrying high-frequency switching current have to be
carefully layout on the board in order to minimize EMI,
ripple and noise in general. The thicker lines shown on
Figure 34 indicate the switching current path. All these
traces have to be short and wide enough to minimize the
parasitic inductance and resistance. The loop shown on
Figure 34 corresponds to the current path when the
W-6137 internal switch is closed. On Figure 35 is shown
the current loop when the W-6137 switch is open. Both
loop areas should be as small as possible.
Capacitor C1 has to be placed as close as possible to the
VIN pin and GND. The capacitor C2 has to be connected
separately to the top LED anode. A ground plane under the
W-6137 allows for direct connection of the capacitors to
ground. The resistor R1 must be connected directly to the
GND pin of the W-6137 and not shared with the switching
current loops and any other components.
L
D
L
D
V
OUT
V
OUT
V
IN
V
IN
SW
SW
VIN
VIN
Switch
Closed
Switch
Open
W-6137
W-6137
FB
FB
SHDN
SHDN
C
C
C
1
R1
1
2
R1
C
2
GND
GND
Figure 34. Closedïswitch Current Loop
Figure 35. Openïswitch Current Loop
14
W-6137
PACKAGE DIMENSIONS
TSOTï23, 5 LEAD
CASE 419AEï01
ISSUE O
SYMBOL
MIN
NOM
MAX
1.00
0.10
0.90
0.45
0.20
D
A
A1
A2
b
e
0.01
0.80
0.30
0.12
0.05
0.87
c
0.15
D
2.90 BSC
2.80 BSC
1.60 BSC
0.95 TYP
0.40
E1
E
E
E1
e
L
0.30
0.50
L1
L2
e
0.60 REF
0.25 BSC
0º
8º
TOP VIEW
A2 A
A1
L
b
c
L2
L1
SIDE VIEW
END VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MO-193.
15
W-6137
Example of Ordering Information (Note 5)
Prefix
Device #
Suffix
W
-
6137
TD
ï G
T3
Company ID
(Optional)
Product Number
Package
TD: TSOTï23
Lead Finish
G: NiPdAu
Tape & Reel
T: Tape & Reel
3: 3,000 / Reel
6137
3. All packages are RoHSïcompliant (Leadïfree, Halogenïfree).
4. The standard lead finish is NiPdAu.
5. The device used in the above example is a W-6137T'ïGT3 (TSO7ï23, NiPdAu Plated Finish, Tape & Reel, 3,000/Reel).
NIDEC COPAL reserves the right to make changes without further notice to any products herein.
NIDEC COPAL makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does NIDEC COPAL assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in NIDEC COPAL data sheets and/or specifications can and do vary in different applications and actual performance may vary over time.
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NIDEC COPAL does not convey any license under its patent rights nor the rights of others.
NIDEC COPAL products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to
support or sustain life, or for any other application in which the failure of the NIDEC COPAL product could create a situation where personal injury or death may occur.
Should Buyer purchase or use NIDEC COPAL products for any such unintended or unauthorized application, Buyer shall indemnify and hold NIDEC COPAL and its officers,
employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly,
any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that NIDEC COPAL was negligent regarding the design or
manufacture of the part.
W-6137/(
相关型号：
W-6137TD-GT
CMOS Boost ConverterWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
NIDEC
W-6139
22 V High Current BoostWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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NIDEC
W-6139TD-GE
22 V High Current BoostWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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NIDEC
W-6139TD-GT
22 V High Current BoostWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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NIDEC
W-6237
High Voltage CMOS BoostWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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NIDEC
W-6237TD-3
High Voltage CMOS BoostWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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NIDEC
W-6237TD-G3
High Voltage CMOS BoostWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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NIDEC
W-6237TD-GT
High Voltage CMOS BoostWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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NIDEC
W-6237TD-T
High Voltage CMOS BoostWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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NIDEC
W-6238
High Efficiency 10 LED Boost ConverterWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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NIDEC
W-6238TD-GT3
High Efficiency 10 LED Boost ConverterWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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NIDEC
W-7
FuseWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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ETC
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