SGM3759 [SGMICRO]
38V High Efficiency, Boost White LED Driver with Strobe Interface for Flash Mode;
| 型号： | SGM3759 |
| 厂家： | 
Shengbang Microelectronics Co, Ltd |
| 描述： | 38V High Efficiency, Boost White LED Driver with Strobe Interface for Flash Mode |
| 文件： | 总11页 (文件大小：791K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SGM3759
38V High Efficiency, Boost White LED
Driver with Strobe Interface for Flash Mode
GENERAL DESCRIPTION
FEATURES
The SGM3759 is a high efficiency white LED driver with
a 1.2MHz boost converter. With the fixed switching
frequency and an internal 40V/3A switch FET, the
SGM3759 is designed for powering single or parallel
LED strings for various size panel backlighting and
ideal for smart phone image capture using display
device as a flash mode light source, as it is capable of
driving up to 200mA current at 30V for 320ms when the
strobe signal is active.
● Input Voltage Range: 2.7V to 5.5V
● Integrated 40V/3A Switch
● Up to 200mA Output Current at 30V
● Accumulated 320ms Flash Timer Control
● Switching Frequency: 1.2MHz
● PWM Dimming Control
● PWM Dimming Frequency: 20kHz to 100kHz
● Strobe Interface for Image Capture Mode
● Up to 87% Efficiency for 7S2P LEDs
● Up to 92% Efficiency for 3S20P LEDs
● Dimming Stable in 1:500 Range
● Feedback Voltage
The FB feedback voltage is regulated at 200mV
typically. The backlight mode default LED current is
programmed by an external RSET resistor. During the
operation, the LED current can be controlled by
applying a PWM signal to the CTRL pin. The feedback
voltage depends on the PWM signal duty cycle. For
PWM dimming control, there are no audible noises on
the output capacitor.
Backlight Mode: 200mV
Flash Mode: 1000mV
● Flash Mode Under-Voltage Lockout
● Automatic Soft-Start for Reducing Inrush Current
● PFM Mode at Light Load
● Protection Features
The SGM3759 integrates LED open protection. It
prevents the device from damaging due to the over-
voltage during LED open conditions.
38V Over-Voltage Protection
LED Open or Short Protection
Thermal Shutdown
● -40℃ to +85℃ Operating Temperature Range
● Available in a Green TSOT-23-6 Package
When the device is in operation and the STROBE pin is
pulled up, the SGM3759 will enter flash mode within
100µs. The feedback voltage is regulated to 5× of the
backlight mode voltage that is determined by the PWM
signal duty cycle. When the STROBE pin is pulled
down or the strobe signal remains high for longer than
the 320ms timer, the SGM3759 will enter backlight
mode within 100µs.
APPLICATIONS
PDAs, Handheld Computers
Backlight for Media Form Factor LCD Displays with
1-Cell Battery Input
The SGM3759 is available in a Green TSOT-23-6
package. It operates over an ambient temperature
range of -40℃ to +85℃.
SG Micro Corp
FEBRUARY2018–REV. A
www.sg-micro.com
38V High Efficiency, Boost White LED
SGM3759
Driver with Strobe Interface for Flash Mode
PACKAGE/ORDERING INFORMATION
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
MODEL
SGM3759
TSOT-23-6
SGM3759YTN6G/TR
M17XX
Tape and Reel, 3000
-40℃ to +85℃
MARKING INFORMATION
NOTE: XX = Date Code.
TSOT-23-6
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
Voltages on VIN, CTRL, STROBE, FB ................ -0.3V to 6V
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.
Package Thermal Resistance
TSOT-23-6, θJA ........................................................ 190℃/W
Voltage on SW................................................... -0.3V to 40V
Junction Temperature.................................................+150℃
Storage Temperature Range........................-65℃ to +150℃
Lead Temperature (Soldering, 10s)............................+260℃
ESD Susceptibility
ESD SENSITIVITY CAUTION
HBM.............................................................................3000V
MM.................................................................................200V
CDM ............................................................................1000V
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.
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range...........................................2.7V to 5.5V
Output Voltage Range ........................................... VIN to 38V
Inductor........................................................... 4.7μH to 22μH
Input Capacitor ...................................................... 1μF (MIN)
Output Capacitor.................................................1μF to 10μF
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
FEBRUARY 2018
2
38V High Efficiency, Boost White LED
SGM3759
Driver with Strobe Interface for Flash Mode
PIN CONFIGURATION
(TOP VIEW)
SW
1
2
6
5
VIN
GND
FB
STROBE
3
4
CTRL
TSOT-23-6
PIN DESCRIPTION
PIN
1
NAME
SW
I/O
FUNCTION
Boost Switching Node. The device monitors the output voltage on this pin for LED open
protection. Connect an inductor between the VIN and SW pins.
I
O
I
2
GND
FB
Ground Pin.
3
Feedback Input for Current. Connect the sense resistor from FB to GND.
Boost Regulator Control Pin. It is used for enable control and PWM dimming control.
4
CTRL
STROBE
VIN
I
Strobe Signal Input Pin. STROBE synchronizes the flash pulse to the image capture.
Generally, this signal is directly generated from the image sensor.
5
I
6
I
Input Supply Pin.
TYPICAL APPLICATION
L
10μH
D1
7S2P
VIN
VIN
SW
GND
FB
2.7V to 5.5V
COUT
1μF
CIN
22μF
SGM3759
Strobe
STROBE
Enable and
CTRL
PWM Dimming Control
RSET
5Ω
Figure 1. Typical Application Circuit
SG Micro Corp
www.sg-micro.com
FEBRUARY 2018
3
38V High Efficiency, Boost White LED
SGM3759
Driver with Strobe Interface for Flash Mode
ELECTRICAL CHARACTERISTICS
(VIN = 3.6V, CTRL = VIN, CIN = 22μF, Full = -40℃ to +85℃, typical values are at TA = +25℃, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
TEMP
MIN
TYP
MAX UNITS
Power Supply
Input Voltage Range
VIN
Full
2.7
5.5
2.5
V
V
V
IN falling
2.2
2.3
100
0.2
+25℃
+25℃
+25℃
+25℃
+25℃
Under-Voltage Lockout Threshold
UVLO
VIN rising
V
UVLO Hysteresis
VHYS
IQ
mV
mA
μA
Operating Quiescent Current into VIN
Shutdown Current
VFB = 300mV, no switching
CTRL = GND
0.35
1
ISD
Boost Converter
PWM duty cycle 100%
PWM duty cycle 10%
PWM duty cycle 1%
PWM duty cycle 0.2%
PWM duty cycle 100%
PWM duty cycle 67%
PWM duty cycle 33%
VFB = 100mV
195.5
18
200
20
206.3
22
mV
mV
mV
mV
mV
mV
mV
μA
ms
Ω
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
Full
Backlight Mode Feedback Regulation Voltage
Flash Mode Feedback Regulation Voltage
VFB(BL)
1.4
2.2
0.65
1000
670
330
0.6
3
950
630
300
1050
710
360
1
VFB(FL)
FB Pin Bias Current
IFB
tREF
RDS(ON)
fSW
VREF Filter Time Constant
0.1
0.2
1.2
1.5
3
N-Channel MOSFET On-Resistance
Switching Frequency
0.3
0.9
1.35
1.85
MHz
A
Switching MOSFET Current Limit for Backlight Mode
Switching MOSFET Current Limit for Flash Mode
Output Voltage Over-Voltage Threshold
Control
ILIMBL
ILIMFL
VOVP_SW
1.15
+25℃
+25℃
Full
A
36
38
39.5
0.4
V
CTRL Logic High Voltage
VCTRLH
VCTRLL
RCTRLPD
tRP1
Full
1.6
V
V
CTRL Logic Low Voltage
Full
CTRL Pin internal Pull-Down Resistor
CTRL Logic High Time to Backlight Mode
CTRL Logic Low Time to Shutdown
STROBE Logic High Voltage
580
6
kΩ
ms
ms
V
+25℃
+25℃
+25℃
Full
tSD1
CTRL high to low
2.5
1.6
VSTROBEH
VSTROBEL
RSTROBEPD
tRP2
STROBE Logic Low Voltage
Full
0.4
V
STROBE Pin internal Pull-Down Resistor
STROBE Logic High Time to Flash Mode
STROBE Logic Low Time to Backlight Mode
Flash Mode Under-Voltage Lockout Threshold
Flash Mode UVLO Hysteresis
Flash Mode Timer
180
50
kΩ
µs
µs
V
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
tSD2
50
UVLOFL
VHYSFL
tP
3.2
3.3
100
320
3.45
mV
ms
kHz
ns
ms
%
280
20
380
100
PWM Dimming Frequency Range
Minimum PWM On-Time
DFR
40
PWM Duty Cycle Changing Time to Output
Stable Dimming Range
DCCTO Duty cycle from100% to 50%
DR
2
0.2
100
Thermal Shutdown
Thermal Shutdown Threshold
TSHUTDOWN
THYS
160
20
℃
℃
Thermal Shutdown Hysteresis
SG Micro Corp
www.sg-micro.com
FEBRUARY 2018
4
38V High Efficiency, Boost White LED
SGM3759
Driver with Strobe Interface for Flash Mode
RECOMMENDED COMPONENTS OF TEST CIRCUITS
Component
Component
Inductor
Diode
10μH/ETQP3M100KVP
1μF/C2012X7R1H105JT
22μF/C2012X7R1H226JT
Capacitor
PMEG4030ER
TYPICAL PERFORMANCE CHARACTERISTICS
TA = +25℃, L = 10μH, CIN = 22μF, COUT = 1μF, unless otherwise noted.
Feedback Voltage vs. PWM Duty Cycle
Efficiency vs. Output Current
VIN = 3.6V
200
160
120
80
100
80
60
40
20
0
VIN = 3.6V
fPWM = 40kHz
5S2P LEDs
6S2P LEDs
7S2P LEDs
8S2P LEDs
40
fPWM = 20kHz
0
0
20
40
60
80
100
0
8
16
24
32
40
PWM Duty Cycle (%)
Output Current (mA)
Efficiency vs. Output Current
VIN = 4.2V, 7S2P LEDs
Efficiency vs. Output Current
VIN = 5V, 3S20P LEDs
100
80
60
40
20
0
100
90
80
70
60
50
40
0
8
16
24
32
40
0
80
160
240
320
400
Output Current (mA)
Output Current (mA)
SG Micro Corp
www.sg-micro.com
FEBRUARY 2018
5
38V High Efficiency, Boost White LED
SGM3759
Driver with Strobe Interface for Flash Mode
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TA = +25℃, L = 10μH, CIN = 22μF, COUT = 1μF, unless otherwise noted.
Open LED Protection
Output Ripple at PWM Dimming
PWM
AC Coupled
VOUT
VOUT
VFB
IL
ILED
VIN = 3.6V, ILED = 20mA, 7S2P LEDs
Time (2s/div)
VIN = 3.6V, ILED = 20mA, 7S2P LEDs
Time (50μs/div)
Switching Waveform
Switching Waveform
VSW
VSW
VOUT
IL
AC Coupled
AC Coupled
VOUT
IL
VIN = 3.6V, ILED = 40mA, 7S2P LEDs
VIN = 3.6V, ILED = 200mA, 7S2P LEDs
Time (2μs/div)
Time (2μs/div)
Start-Up
Start-Up
VCTRL
VCTRL
VOUT
VOUT
IL
IL
VIN = 3.6V, ILED = 40mA, 7S2P LEDs
Time (2ms/div)
VIN = 3.6V, ILED = 400mA, 3S20P LEDs
Time (2ms/div)
SG Micro Corp
www.sg-micro.com
FEBRUARY 2018
6
38V High Efficiency, Boost White LED
SGM3759
Driver with Strobe Interface for Flash Mode
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TA = +25℃, L = 10μH, CIN = 22μF, COUT = 1μF, unless otherwise noted.
Flash Mode Start-Up
Flash Mode Shut-Down
STROBE
VFB
STROBE
IL
VFB
IL
VIN = 3.6V, 7S2P LEDs
VIN = 3.6V, 7S2P LEDs
Time (20μs/div)
Time (10μs/div)
Flash Mode Over Time Protection
Flash Mode Over Time Protection
STROBE
VOUT
STROBE
VOUT
VFB
VFB
IL
IL
VIN = 3.6V, T = 200ms, D = 50%, 7S2P LEDs
Time (200ms/div)
VIN = 3.6V, T = 400ms, D = 50%, 7S2P LEDs
Time (200ms/div)
Flash Mode Over Time Protection
STROBE
VOUT
VFB
IL
VIN = 3.6V, T = 800ms, D = 50%, 7S2P LEDs
Time (200ms/div)
SG Micro Corp
FEBRUARY 2018
www.sg-micro.com
7
38V High Efficiency, Boost White LED
SGM3759
Driver with Strobe Interface for Flash Mode
ADDITIONAL TYPICAL APPLICATION
L
22μH
D1
VIN
VIN
SW
GND
FB
2.7V to 5.5V
COUT
10μF
CIN
22μF
3S20P
60 LEDs
SGM3759
Strobe
……
STROBE
Enable and
CTRL
PWM Dimming Control
RSET
0.5Ω
Figure 2. Drive 60 LEDs for Media Form Factor Display
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (FEBRUARY 2018) to REV.A
Changed from product preview to production data.............................................................................................................................................All
SG Micro Corp
www.sg-micro.com
FEBRUARY 2018
8
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
Dimensions
In Inches
Symbol
MIN
MAX
MIN
MAX
0.043
0.004
0.039
0.020
0.008
0.116
0.065
0.116
A
A1
A2
b
1.000
0.100
0.900
0.500
0.200
2.950
1.650
2.950
0.000
0.700
0.300
0.080
2.850
1.550
2.650
0.000
0.028
0.012
0.003
0.112
0.061
0.104
c
D
E
E1
e
0.950 BSC
0.037 BSC
L
0.300
0°
0.600
8°
0.012
0°
0.024
8°
θ
SG Micro Corp
www.sg-micro.com
TX00038.001
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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