SGM3732 [SGMICRO]
PWM Dimming, 38V Boost LED Driver;
| 型号： | SGM3732 |
| 厂家： | 
Shengbang Microelectronics Co, Ltd |
| 描述： | PWM Dimming, 38V Boost LED Driver |
| 文件： | 总10页 (文件大小：513K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SGM3732
PWM Dimming, 38V Boost LED Driver
GENERAL DESCRIPTION
FEATURES
The SGM3732 is a high efficiency constant current LED
driver with a 1.1MHz PWM boost converter. An internal
low-side N-channel MOSFET and a high switching
frequency make the SGM3732 easy to use small
components and optimized for compact solutions.
● Input Voltage Range: 2.7V to 5.5V
● Support up to 10 LEDs in Series
● Integrated 40V/1.35A Switch
● High Efficiency PWM Boost Converter
● Switching Frequency: 1.1MHz
● Low Feedback Voltage: 200mV
The SGM3732 is capable of driving either up to 10
LEDs in series for 38V output or total 260mA current
with 3 LEDs in series per string while achieving high
conversion efficiency. The LED current can be
programmed by digital PWM dimming interface. The
PWM frequency is in the range from 2kHz to 60kHz.
● PWM Dimming Frequency: 2kHz to 60kHz
● 38V LED Open Protection
● 500kΩ Pull-Down Resistor on CTRL Pin
● Automatic Soft-Start for Reducing Inrush Current
● Less than 1µA Shutdown Current
● -40℃ to +85℃ Operating Temperature Range
● Available in a Green TSOT-23-6 Package
The SGM3732 provides very low shutdown current. It
also includes a comprehensive set of protection
features such as over-voltage protection, cycle-by-
cycle input current limit and thermal shutdown.
APPLICATIONS
The SGM3732 is available in a Green TSOT-23-6
package. It operates over an ambient temperature
range of -40℃ to +85℃.
LED Backlighting
Mobile Phones and Digital Photo Frames
Portable Devices
Automotive Navigation
SG Micro Corp
SEPTEMBER 2021 – REV. A. 4
www.sg-micro.com
SGM3732
PWM Dimming, 38V Boost LED Driver
PACKAGE/ORDERING INFORMATION
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
MODEL
SGM3732
TSOT-23-6
SGM3732YTN6G/TR
SKAXX
Tape and Reel, 3000
-40℃ to +85℃
MARKING INFORMATION
NOTE: XX = Date Code.
YYY X X
Date Code - Month
Date Code - Year
Serial Number
Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact your SGMICRO representative directly.
ABSOLUTE MAXIMUM RATINGS
OVERSTRESS CAUTION
Input Voltage, VIN................................................. -0.3V to 6V
High Voltage Nodes, SW, VOUT ....................... -0.3V to 40V
Other Pins, FB, CTRL...............................-0.3V to VIN + 0.3V
Package Thermal Resistance
Stresses beyond those listed in Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods
may affect reliability. Functional operation of the device at any
conditions beyond those indicated in the Recommended
Operating Conditions section is not implied.
TSOT-23-6, θJA ........................................................ 120℃/W
Junction Temperature.................................................+150℃
Storage Temperature Range........................-65℃ to +150℃
Lead Temperature (Soldering, 10s)............................+260℃
ESD Susceptibility
ESD SENSITIVITY CAUTION
This integrated circuit can be damaged if ESD protections are
not considered carefully. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failureto observe proper handlingand installation procedures
can cause damage. ESD damage can range from subtle
performance degradation tocomplete device failure. Precision
integrated circuits may be more susceptible to damage
because even small parametric changes could cause the
device not to meet the published specifications.
HBM.............................................................................4000V
MM.................................................................................200V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range...........................................2.7V to 5.5V
Operating Temperature Range.......................-40℃ to +85℃
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2021
2
SGM3732
PWM Dimming, 38V Boost LED Driver
PIN CONFIGURATION
(TOP VIEW)
SW
GND
FB
1
2
3
6
5
4
VIN
VOUT
CTRL
TSOT-23-6
PIN DESCRIPTION
PIN
1
NAME
SW
FUNCTION
Boost Converter Switching Node.
Ground Pin.
2
GND
FB
3
Feedback Input for Current. It is regulated at 200mV.
Boost Regulator Control Pin. It is used for enable and PWM dimming control.
Output Voltage Pin.
4
CTRL
VOUT
VIN
5
6
Input Supply Pin.
TYPICAL APPLICATION
L
D1
Up to 38V Output
Input Range
2.7V ~ 5.5V
6
4
1
5
VIN
SW
VOUT
COUT
CIN
Up to 10 in series
or up to 10S4P
SGM3732
1kΩ
3
PWM Dimming
CTRL
FB
RSET
GND
2
Figure 1. Typical Application Circuit
SG Micro Corp
SEPTEMBER 2021
www.sg-micro.com
3
SGM3732
PWM Dimming, 38V Boost LED Driver
ELECTRICAL CHARACTERISTICS (1)
(VIN = 3.6V, L = 10μH, CIN = 10μF, COUT = 0.47μF, Full = -40℃ to +85℃, typical values are at TA = +25℃, unless otherwise
noted.)
PARAMETER
SYMBOL
CONDITIONS
TEMP
MIN
TYP
MAX
UNITS
IC Supply
Input Voltage Range
VIN
Full
2.7
5.5
2.6
V
V
Input Under-Voltage Lockout
UVLO Hysteresis
UVLO
VHYS
Rising edge
2.5
0.15
0.20
0.72
0.1
+25℃
+25℃
+25℃
+25℃
+25℃
V
Quiescent Current (Non Switching)
Operating Current (Switching)
VIN Pin Shutdown Current
Step-Up Converter
VFB = 0.4V
VFB = 0V
VEN = 0V
0.35
1.5
1
mA
mA
μA
IQ
ISHDN
Voltage Feedback Regulation Voltage
VREF
Full
192
3.5
200
6
212.5
8.5
mV
mV
Voltage Feedback Regulation Voltage Under
Brightness Control
VREF_PWM fPWM = 10kHz, duty cycle = 3%
+25℃
VREF Filter 3dB Frequency
Voltage Feedback Input Bias Current
SW Pin Leakage Current
Peak NMOS Current Limit
Oscillator Frequency
fREF(3dB)
IFB
600
0.001
0.01
1.35
1.10
38.0
800
Hz
μA
μA
A
+25℃
Full
0.3
1
ISW
+25℃
+25℃
Full
ILIM
fS
0.90
35.5
1.4
MHz
V
Over-Voltage Threshold
VOVP
tS
Measured at VOUT pin
Full
40.5
Start-Up Time
μs
+25℃
Control
Logic Low Threshold
VIL
VIH
Full
Full
0.35
60
V
V
Logic High Threshold
1.5
2
PWM Dimming Frequency Range
Minimum Shutdown Pulse Width Timing
Junction Thermal Shutdown Threshold
Junction Thermal Shutdown Hysteresis
DFR
tOFF
kHz
ms
℃
+25℃
+25℃
3
150
15
℃
NOTE:
1. The SGM3732 is guaranteed to meet performance specifications over the -40℃ to +85℃ operating temperature range by
design, characterization and correlation with statistical process controls.
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2021
4
SGM3732
PWM Dimming, 38V Boost LED Driver
RECOMMENDED COMPONENTS OF TEST CIRCUITS
Component
Component
22μH/CD75NP-220KC
10μH/CD75NP-100KC
MBR0540
10μF/C2012X7R1H106KT
0.47μF/C2012X7R1H474KT
Inductor
Diode
Capacitor
TYPICAL PERFORMANCE CHARACTERISTICS
TA = +25℃, L = 10μH, CIN = 10μF, COUT = 0.47μF, unless otherwise noted.
Switching Waveform
Open LED Protection
VFB
VSW
AC Coupled
VOUT
VOUT
IL
IL
VIN = 3.6V, ILED = 20mA, L=10μH, 8 LEDs
VIN = 3.6V, ILED = 20mA, L = 10μH, 8 LEDs
Time (100μs/div)
Time (1μs/div)
Start-Up
Output Ripple at PWM Dimming
PWM
VOUT
ILED
VEN
AC Coupled
VOUT
IL
VIN = 3.6V, ILED = 20mA, fPWM = 10kHz,
L=10μH, 8 LEDs
VIN = 3.6V, ILED = 20mA, L = 10μH, 8 LEDs
Time (1ms/div)
Time (100μs/div)
SG Micro Corp
SEPTEMBER 2021
www.sg-micro.com
5
SGM3732
PWM Dimming, 38V Boost LED Driver
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TA = +25℃, L = 10μH, CIN = 10μF, COUT = 0.47μF, unless otherwise noted.
Feedback Voltage vs. Temperature
IN =3.6V, DPWM = 100%
Feedback Voltage vs. Input Voltage
PWM = 100%
215
210
205
200
195
190
185
215
210
205
200
195
190
185
D
V
2.5
3
3.5
4
4.5
5
5.5
-50
-25
0
25
50
75
100
Input Voltage (V)
Temperature (℃)
Efficiency vs. Input Voltage
Efficiency vs. Input Voltage
90
86
82
78
74
70
90
86
82
78
74
70
ILED = 20mA, L = 22μH
ILED = 20mA, L = 10μH
10 LEDs (32V)
10 LEDs (32V)
2.5
3
3.5
4
4.5
5
5.5
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Input Voltage (V)
Efficiency vs. Output Current
LED Current vs. PWM Duty Cycle
24
21
18
15
12
9
90
85
80
75
70
65
60
VIN = 3.6V, ILED = 20mA, L = 10μH, 6 LEDs
VIN = 3.6V, L = 10μH
fPWM = 2kHz
fPWM = 20kHz
6
3
10 LEDs (32V)
0
0
20
40
60
80
100
0
5
10
15
20
25
30
PWM Duty Cycle (%)
Output Current (mA)
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2021
6
SGM3732
PWM Dimming, 38V Boost LED Driver
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
SEPTEMBER 2021 ‒ REV.A.3 to REV.A.4
Page
Changed Ordering Information section ................................................................................................................................................................2
Changed Package Outline Dimensions section .................................................................................................................................................11
JULY 2016 ‒ REV.A.2 to REV.A.3
Page
Changed Ordering Number..................................................................................................................................................................................2
Changed Package Outline Dimensions section .................................................................................................................................................10
JUNE 2015 ‒ REV.A.1 to REV.A.2
Page
New version.......................................................................................................................................................................................................All
JULY 2014 ‒ REV.A to REV.A.1
Page
Added Functional Description section..................................................................................................................................................................8
Changed Figure 1................................................................................................................................................................................................9
Changed Figure 2..............................................................................................................................................................................................10
Changes from Original (MARCH 2014) to REV.A
Page
Changed from product preview to production data.............................................................................................................................................All
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2021
7
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
TSOT-23-6
0.69
0.95
D
e
2.59
E1
E
0.99
b
RECOMMENDED LAND PATTERN (Unit: mm)
L
A
θ
0.25
A1
c
A2
Dimensions In Millimeters
Symbol
MIN
-
MOD
MAX
1.100
0.100
1.000
0.500
0.200
3.050
1.700
2.950
A
A1
A2
b
-
0.000
0.700
0.300
0.080
2.820
1.550
2.650
-
-
-
c
-
D
E
-
-
E1
e
-
0.950 BSC
L
0.300
0°
-
-
0.600
8°
θ
NOTES:
1. Body dimensions do not include mode flash or protrusion.
2. This drawing is subject to change without notice.
SG Micro Corp
TX00038.002
www.sg-micro.com
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
P0
W
Q2
Q4
Q2
Q4
Q2
Q4
Q1
Q3
Q1
Q3
Q1
Q3
B0
Reel Diameter
P1
A0
K0
Reel Width (W1)
DIRECTION OF FEED
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Reel Width
Reel
Diameter
A0
B0
K0
P0
P1
P2
W
Pin1
Package Type
W1
(mm)
(mm) (mm) (mm) (mm) (mm) (mm) (mm) Quadrant
TSOT-23-6
7″
9.5
3.20
3.10
1.10
4.0
4.0
2.0
8.0
Q3
SG Micro Corp
TX10000.000
www.sg-micro.com
PACKAGE INFORMATION
CARTON BOX DIMENSIONS
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Length
(mm)
Width
(mm)
Height
(mm)
Reel Type
Pizza/Carton
7″ (Option)
7″
368
442
227
410
224
224
8
18
SG Micro Corp
www.sg-micro.com
TX20000.000
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