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LTM8042 데이터시트 PDF




Linear Technology에서 제조한 전자 부품 LTM8042은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 LTM8042 자료 제공

부품번호 LTM8042 기능
기능 uModule Boost LED Driver and Current Source
제조업체 Linear Technology
로고 Linear Technology 로고


LTM8042 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




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LTM8042 데이터시트, 핀배열, 회로
FEATURES
n True Color PWM™ with 3000:1 Dimming Ratio
n Operates in Boost, Buck Mode or Buck-Boost Mode
n Wide Input Voltage Range:
Operation from 3V to 30V
Transient Protection to 40V
n Gate Driver for Optional PWM Dimming with
P-channel MOSFET
n Adjustable Frequency: 250kHz to 2MHz
n Constant-Current and Constant-Voltage Regulation
n Low Shutdown Current: <1μA
n RoHS Compliant Package with Gold Pad Finish
n Tiny, Low Profile (9mm × 15mm × 2.82mm)
Surface Mount LGA Package
APPLICATIONS
n Display Backlighting
n Automotive and Avionic Lighting
n Illumination
n Scanners
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks
and True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are
the property of their respective owners.
LTM8042/LTM8042-1
µModule Boost LED Driver
and Current Source
DESCRIPTION
The LTM®8042 is a complete µModule® Boost LED Driver
specifically designed to drive LEDs up to 1A, while the
LTM8042-1 drives up to 350mA. It combines a boost
power topology with a unique current loop to operate as
a constant-current source. The PWM input provides as
much as 3000:1 LED dimming, while 10:1 analog dimming
can be accomplished by a single resistor or analog voltage
applied to the CTL pin. As with any boost topology, the
LTM8042/LTM8042-1 has an uninterrupted current path
between its input and output and is thus intolerant to a
short-circuit or overload from the output to ground.
# WHITE LEDS
6
7
8
9
LED CURRENT
1A
350mA
1A
350mA
12VIN
LTM8042
LTM8042-1
24VIN
LTM8042
LTM8042-1
The LTM8042/LTM8042-1 is packaged in a thermally
enhanced, compact overmolded land grid array (LGA)
package. The LTM8042/LTM8042-1 is Pb-free and a
RoHS compliant.
TYPICAL APPLICATION
µModule Boost LED Driver, Driving 8 White LEDs at 1A
VIN
16V TO 26V
4.7µF
VCC LTM8042
RUN
BSTIN/BKLED
LED+
TG
PWM BSTOUT/BKIN
SYNC
TGEN
SS
RT GND CTL
33.2k
fSW = 550kHz
UP TO 26.8V
1A
4.7µF
80421 TA01a
Efficiency vs VIN
97
96
95
94
93
92
91
90
89
88
87
16 17 18 19 20 21 22 23 24 25 26
VIN (V)
80421 TA01b
For more information www.linear.com/LTM8042
80421fb
1




LTM8042 pdf, 반도체, 판매, 대치품
LTM8042/LTM8042-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
LTM8042
6E.ff8iVcieant c1yAvLsEVDINS,trBionogst Operation,
1E0ff.i1ciVenacty1AvsLVEIDN,SBtroionsgt Operation,
1E3ff.i4ciVenacty1AvsLVEIDN,SBtroionsgt Operation,
90
94
89
88 92
95
94
93
87 90
86
88
85
92
91
90
84 86
89
83 84
82
81 82
88
87
86
80
4
5
VIN (V)
80
6 5 6 7 8 9 10
VIN (V)
85
7 8 9 10 11 12 13
VIN (V)
80421 G01
80421 G02
80421 G03
E1f6f.i7ciVenacty1AvsLVEIDN,SBtroionsgt Operation,
94
92
90
88
86
84
82
80
8
9 10 11 12 13 14 15 16
VIN (V)
80421 G04
2E0ff.i1ciVenacty1AvsLVEIDN,SBtroionsgt Operation,
97
95
93
91
89
87
85
83
11 12 13 14 15 16 17 18 19
VIN (V)
80421 G05
Efficiency vs VIN, Boost Operation,
23.4V at 1A LED String
97
95
93
91
89
87
85
83
12 13 14 15 16 17 18 19 20 21 22
VIN (V)
80421 G06
2E6ff.i8ciVenacty1AvsLVEIDN,SBtroionsgt Operation,
97
96
95
94
93
92
91
90
89
88
87
16 17 18 19 20 21 22 23 24 25 26
VIN (V)
80421 G07
3E.ff5iVcieant c1yAvLsEVDINS,trBiuncgk Mode,
89
87
85
83
81
79
77
75
4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34
VIN (V)
80421 G08
6E.ff8iVcieant c1yAvLsEVDINS,trBiuncgk Mode,
94
92
90
88
86
84
82
80
8 10 12 14 16 18 20 22 24 26 28 30 32 34
VIN (V)
80421 G09
80421fb
4 For more information www.linear.com/LTM8042

4페이지










LTM8042 전자부품, 판매, 대치품
LTM8042/LTM8042-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
LTM8042
Junction Temperature Rise vs Load,
Buck Mode, 2.9V at 1A LED String
18
Junction Temperature Rise vs Load,
Buck Mode, 3.8V at 1A LED String
18
Junction Temperature Rise vs Load,
Buck Mode, 8.3V at 1A LED String
25
16
14
12 24VIN
10
16
14 24VIN
12
10
20
24VIN
15
8
12VIN
8
12VIN
10
66
12VIN
4 45
22
0
0 200 400 600 800 1000
LED CURRENT (mA)
0
0 200 400 600 800 1000
LED CURRENT (mA)
0
0 200 400 600 800 1000
LED CURRENT (mA)
80421 G26
80421 G27
80421 G28
Junction Temperature Rise vs Load,
Buck Mode, 10.9V at 1A LED String
25
Junction Temperature Rise vs Load,
Buck Mode, 13.6V at 1A LED String
30
Junction Temperature Rise vs Load,
Buck Mode, 18.1V at 1A LED String
25
20
24VIN
15
10
5
25
20
24VIN
15
10
5
20
24VIN
15
10
5
0
0 200 400 600 800 1000
LED CURRENT (mA)
80421 G29
Junction Temperature Rise
vs Load, Buck-Boost Mode,
2.9V at 1A LED String
25
20
24VIN
15
10 5VIN
5
12VIN
0
0 200 400 600 800 1000
LED CURRENT (mA)
80421 G32
0
0 200 400 600 800 1000
LED CURRENT (mA)
80421 G30
Junction Temperature Rise
vs Load, Buck-Boost Mode,
3.8V at 1A LED String
30
25 5VIN
20
24VIN
15
12VIN
10
5
0
0 200 400 600 800 1000
LED CURRENT (mA)
80421 G33
For more information www.linear.com/LTM8042
0
0 200 400 600 800 1000
LED CURRENT (mA)
80421 G31
Junction Temperature Rise
vs Load, Buck-Boost Mode,
8.3V at 1A LED String
40
35
30
12VIN
25
20
15
10
5
0
0 200 400 600 800 1000
LED CURRENT (mA)
80421 G34
80421fb
7

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